CN107795774B - Corrosion protection structure and construction method for connecting dissimilar metal pipes on ships - Google Patents
Corrosion protection structure and construction method for connecting dissimilar metal pipes on ships Download PDFInfo
- Publication number
- CN107795774B CN107795774B CN201711216646.3A CN201711216646A CN107795774B CN 107795774 B CN107795774 B CN 107795774B CN 201711216646 A CN201711216646 A CN 201711216646A CN 107795774 B CN107795774 B CN 107795774B
- Authority
- CN
- China
- Prior art keywords
- dissimilar metal
- insulating
- flange
- corrosion protection
- enamel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 104
- 239000002184 metal Substances 0.000 title claims abstract description 104
- 238000005260 corrosion Methods 0.000 title claims abstract description 73
- 230000007797 corrosion Effects 0.000 title claims abstract description 51
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 39
- 238000009413 insulation Methods 0.000 claims abstract description 38
- 239000013535 sea water Substances 0.000 claims abstract description 34
- 239000002131 composite material Substances 0.000 claims abstract description 32
- 230000001681 protective effect Effects 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims description 28
- 239000003973 paint Substances 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 23
- 239000000565 sealant Substances 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 11
- 239000002320 enamel (paints) Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 2
- 230000001070 adhesive effect Effects 0.000 claims 2
- 102000004310 Ion Channels Human genes 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 150000002739 metals Chemical class 0.000 description 16
- 238000010292 electrical insulation Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 14
- 239000002966 varnish Substances 0.000 description 11
- 238000007689 inspection Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000006056 electrooxidation reaction Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 2
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 239000010964 304L stainless steel Substances 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 230000036449 good health Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
- F16L25/02—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00 specially adapted for electrically insulating the two pipe ends of the joint from each other
- F16L25/026—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00 specially adapted for electrically insulating the two pipe ends of the joint from each other for flanged joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/003—Auxiliary devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/187—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for flanged joints
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Paints Or Removers (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
技术领域Technical Field
本发明属于电化学腐蚀防护技术领域，更具体地，涉及一种舰船异种金属管系连接腐蚀防护结构及施工方法。The present invention belongs to the technical field of electrochemical corrosion protection, and more specifically, relates to a ship dissimilar metal pipe connection corrosion protection structure and a construction method.
背景技术Background technique
舰船船体、设备及管路等系统构件由不同金属制造而成，主要包括碳钢、低合金钢、不锈钢、铜与铜合金、钛合金等材料。结构或系统之间的连接有时不可避免的涉及到异种金属的接触，若防护处理不到位，异种金属直接接触会形成一个“原电池”，在海水或潮湿环境下，“原电池”回路接通，此时电位较低的金属(阳极构件)向电位较高的金属(阴极构件)提供电子，导致电位低的金属腐蚀加速，而电位较高的金属得到保护，这种腐蚀现象称为异种金属接触腐蚀。Ship hulls, equipment, pipelines and other system components are made of different metals, mainly including carbon steel, low alloy steel, stainless steel, copper and copper alloys, titanium alloys and other materials. The connection between structures or systems sometimes inevitably involves the contact of dissimilar metals. If the protection treatment is not in place, the direct contact of dissimilar metals will form a "galvanic cell". In seawater or humid environments, the "galvanic cell" circuit is connected. At this time, the metal with lower potential (anode component) provides electrons to the metal with higher potential (cathode component), resulting in accelerated corrosion of the metal with lower potential, while the metal with higher potential is protected. This corrosion phenomenon is called dissimilar metal contact corrosion.
异种金属接触腐蚀问题普遍存在。目前国内相关修、造船厂针对舰船异种金属管系连接的腐蚀问题采取了一定的防护措施，但由于绝缘措施不彻底，实际防护效果并不明显。现有异种金属防护施工方法中存在的问题是：(1)采用单一材料制作的电绝缘垫片或者普通的石棉密封垫片隔离异种金属法兰，电绝缘效果不佳；(2)相关管路内、外侧没有涂刷绝缘涂料，无法有效隔断异种金属法兰管路海水中间的离子通道；(3)现有工艺中绝缘套筒或衬套内没有灌注绝缘胶，紧固件端部未完全涂覆绝缘密封胶；(4)对于船体结构、主要管路等全寿命构件的异种金属腐蚀防护不到位。The problem of contact corrosion between dissimilar metals is widespread. At present, relevant domestic repair and shipbuilding yards have taken certain protective measures to address the corrosion problem of dissimilar metal pipe connections on ships, but due to incomplete insulation measures, the actual protection effect is not obvious. The problems existing in the existing dissimilar metal protection construction methods are: (1) The use of electrical insulating gaskets made of a single material or ordinary asbestos sealing gaskets to isolate dissimilar metal flanges has poor electrical insulation effect; (2) The inside and outside of the relevant pipelines are not coated with insulating paint, and the ion channel between the dissimilar metal flange pipeline and the seawater cannot be effectively isolated; (3) In the existing process, the insulating sleeve or bushing is not injected with insulating glue, and the end of the fastener is not completely coated with insulating sealant; (4) The dissimilar metal corrosion protection of full-life components such as hull structures and main pipelines is not in place.
发明内容Summary of the invention
针对现有技术的以上缺陷或改进需求，本发明提供一种舰船异种金属管系连接腐蚀防护结构及施工方法，其目的在于，使用复合电绝缘垫片隔离管系对接法兰(或座板)面和紧固件，切断异种金属接触产生的电子通道，在异种金属管路连接结构及结构两端一定范围内的管路内外壁涂覆绝缘磁漆，增加异种金属接头处两端管系内海水之间的电阻，隔断海水内的离子通道，从而实现良好的电绝缘效果。In view of the above defects or improvement needs of the prior art, the present invention provides a ship dissimilar metal piping connection corrosion protection structure and construction method, the purpose of which is to use a composite electrical insulating gasket to isolate the piping docking flange (or seat plate) surface and fasteners, cut off the electron channel generated by the contact of dissimilar metals, coat the dissimilar metal piping connection structure and the inner and outer walls of the pipeline within a certain range at both ends of the structure with insulating magnetic paint, increase the resistance between the seawater in the piping at both ends of the dissimilar metal joint, and cut off the ion channel in the seawater, thereby achieving a good electrical insulation effect.
为了实现上述目的，按照本发明的一个方面，提供一种舰船异种金属管系连接腐蚀防护结构,包括设于异种金属管系法兰接口外圆周上的螺栓以及与所述螺栓相匹配的螺母，In order to achieve the above object, according to one aspect of the present invention, a ship dissimilar metal pipe connection corrosion protection structure is provided, comprising bolts arranged on the outer circumference of the dissimilar metal pipe flange interface and nuts matching the bolts.
所述法兰接口之间设有复合电绝缘垫片，用于隔断所述法兰之间的电子通道；A composite electrical insulating gasket is provided between the flange interfaces to isolate the electronic channels between the flanges;
所述螺栓的外圆周上套设有保护管，用于切断所述螺栓与所述法兰的电子通道；A protective tube is sleeved on the outer circumference of the bolt to cut off the electronic passage between the bolt and the flange;
所述法兰与螺母之间设有复合电绝缘垫圈，用于切断所述异种法兰与螺母之间的电子通道；且A composite electrical insulating gasket is provided between the flange and the nut to cut off the electronic passage between the heterogeneous flange and the nut; and
在所述异种金属管系连接法兰及两端一定范围内的管路内外壁涂覆绝缘磁漆，增加异种金属接头处两端管系内海水之间的电阻，从而实现所述异种金属管系连接处的绝缘防护。Insulating varnish is applied to the inner and outer walls of the pipes within a certain range at both ends of the dissimilar metal pipe connection flange to increase the resistance between the seawater in the pipes at both ends of the dissimilar metal joint, thereby achieving insulation protection at the connection of the dissimilar metal pipes.
作为本发明进一步优选，所述绝缘磁漆的涂覆长度与所述金属管系的通径关系为：As a further preferred embodiment of the present invention, the relationship between the coating length of the insulating enamel and the diameter of the metal pipe system is:
作为本发明进一步优选，所述保护管与螺栓之间灌注绝缘磁漆或绝缘胶。As a further preferred embodiment of the present invention, insulating varnish or insulating glue is poured between the protection tube and the bolt.
作为本发明进一步优选，在潮湿环境下所述螺栓和螺母包覆密封胶或在海水环境下所述腐蚀防护结构整体包覆密封胶。As a further preferred embodiment of the present invention, the bolts and nuts are coated with sealant in a humid environment or the corrosion protection structure is entirely coated with sealant in a seawater environment.
作为本发明进一步优选，所述密封胶为绝缘磁漆或绝缘胶。As a further preferred embodiment of the present invention, the sealant is insulating varnish or insulating glue.
作为本发明进一步优选，所述法兰之间设有防腐蚀增设管路，所述防腐蚀增设管路的长度为5～8倍的管路通径。As a further preferred embodiment of the present invention, an anti-corrosion additional pipeline is provided between the flanges, and the length of the anti-corrosion additional pipeline is 5 to 8 times of the pipeline diameter.
按照本发明的另一个方面，提供一种所述的舰船异种金属管系连接腐蚀防护结构的施工方法，包括如下步骤：According to another aspect of the present invention, there is provided a construction method for connecting a corrosion protection structure of a ship's dissimilar metal pipe system, comprising the following steps:
(1)异种金属管系法兰接口处表面清洁、检查；(1) Clean and inspect the surface of the flange interface of dissimilar metal pipes;
(2)绝缘磁漆调配，将A、B两种组分按比例混合，在30°～50°恒定温度下，搅拌使其混合均匀；(2) Preparation of insulating enamel: Mix components A and B in proportion and stir at a constant temperature of 30° to 50° to make them uniform;
(3)将调制好的绝缘磁漆均匀的涂覆在异种金属管系连接结构处；(3) Apply the prepared insulating enamel evenly on the connection structure of the dissimilar metal pipe system;
(4)异种金属管系绝缘磁漆涂覆完成后，继续其他加工工序；(4) After the coating of insulating enamel on dissimilar metal pipes is completed, continue with other processing steps;
(5)异种金属管系上船；(5) Different metal pipes are mounted on board;
(6)复合电绝缘垫片、复合电绝缘垫圈、螺栓、螺母及其绝缘零件、绝缘胶的准备、安装；(6) Preparation and installation of composite electrical insulating gaskets, composite electrical insulating washers, bolts, nuts and their insulating parts, and insulating glue;
(7)安装后检查。(7) Inspection after installation.
作为本发明进一步优选，步骤(2)中所述比例为8:1～10:1。As a further preferred embodiment of the present invention, the ratio in step (2) is 8:1 to 10:1.
作为本发明进一步优选，步骤(3)中所述涂覆方法为涂覆2～3次，间隔20～30分钟。As a further preferred embodiment of the present invention, the coating method in step (3) is to coat 2 to 3 times with an interval of 20 to 30 minutes.
作为本发明进一步优选，步骤(3)中所述涂覆方法为第一道漆表面晾干后，再涂刷第二道漆，绝缘磁漆厚度不低于300μm。As a further preferred embodiment of the present invention, the coating method in step (3) is to apply a second coat of paint after the surface of the first coat of paint is dried, and the thickness of the insulating enamel is not less than 300 μm.
总体而言，通过本发明所构思的以上技术方案与现有技术相比，能够取得下列有益效果：In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:
(1)本发明的舰船异种金属管系连接腐蚀防护结构，使用复合电绝缘垫片隔离管系对接法兰(或座板)面和紧固件，切断异种金属接触产生的电子通道，在异种金属管路连接结构及结构两端一定范围内的管路内外壁涂覆绝缘磁漆，增加异种金属接头处两端管系内海水之间的电阻，隔断海水内的离子通道，从而实现良好的电绝缘效果。(1) The ship's dissimilar metal piping connection corrosion protection structure of the present invention uses a composite electrical insulating gasket to isolate the piping docking flange (or seat plate) surface and fasteners, cuts off the electron channel generated by the contact of dissimilar metals, and coats the dissimilar metal piping connection structure and the inner and outer walls of the pipes within a certain range at both ends of the structure with insulating varnish, thereby increasing the resistance between the seawater in the piping at both ends of the dissimilar metal joint and cutting off the ion channel in the seawater, thereby achieving a good electrical insulation effect.
(2)本发明的舰船异种金属管系连接腐蚀防护结构，在绝缘套筒和紧固螺栓(或其他紧固件)之间灌注绝缘胶，进一步实现异种金属连接的绝缘。(2) The ship's dissimilar metal pipe system connection corrosion protection structure of the present invention injects insulating glue between the insulating sleeve and the fastening bolt (or other fasteners) to further achieve insulation of the dissimilar metal connection.
(3)本发明的舰船异种金属管系连接腐蚀防护结构，在潮湿环境下所述螺栓和螺母包覆密封胶或在海水环境下所述腐蚀防护结构整体包覆密封胶，避免了舰船异种金属在海水环境或潮湿环境的电化学腐蚀。(3) The ship's dissimilar metal pipe system of the present invention is connected to the corrosion protection structure. In a humid environment, the bolts and nuts are coated with sealant, or in a seawater environment, the corrosion protection structure is entirely coated with sealant, thereby avoiding electrochemical corrosion of the ship's dissimilar metals in a seawater environment or a humid environment.
(4)本发明的舰船异种金属管系连接腐蚀防护结构施工方法，操作工艺简单，采用多种材料相结合，切断异种金属接触产生的电子通道，实现舰船异种金属之间的良好绝缘，避免其发生腐蚀。(4) The construction method of the corrosion protection structure for connecting dissimilar metal pipes on a ship of the present invention has a simple operation process and adopts a combination of multiple materials to cut off the electron channel generated by the contact of dissimilar metals, thereby achieving good insulation between the dissimilar metals on the ship and avoiding corrosion.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明实施例一种舰船异种金属管系连接腐蚀防护施工结构涉及的典型法兰式连接结构的绝缘处理示意图；FIG1 is a schematic diagram of insulation treatment of a typical flange connection structure involved in a corrosion protection construction structure for connecting dissimilar metal pipes on a ship according to an embodiment of the present invention;
图2为本发明实施例一种舰船异种金属管系连接腐蚀防护施工结构涉及的典型座板式连接结构的绝缘处理示意图；FIG2 is a schematic diagram of insulation treatment of a typical seat plate type connection structure involved in a corrosion protection construction structure for connecting dissimilar metal pipes on a ship according to an embodiment of the present invention;
图3为本发明实施例一种舰船异种金属管系连接腐蚀防护施工结构涉及的典型对夹式连接结构的绝缘处理示意图；FIG3 is a schematic diagram of insulation treatment of a typical clamp-type connection structure involved in a corrosion protection construction structure for connecting dissimilar metal pipes on a ship according to an embodiment of the present invention;
图4为本发明实施例一种舰船异种金属管系连接腐蚀防护施工方法涉及的船体等全寿命结构连接时的绝缘防护示意图；4 is a schematic diagram of insulation protection during connection of full-life structures such as hulls, according to a method for corrosion protection of connection of dissimilar metal pipes on a ship according to an embodiment of the present invention;
图5为本发明实施例一种舰船异种金属管系连接腐蚀防护施工方法涉及的与液舱内海水管系连接时的绝缘防护示意图。5 is a schematic diagram of insulation protection when connected to a seawater pipe system in a liquid tank, which is involved in a corrosion protection construction method for connecting dissimilar metal pipe systems on a ship according to an embodiment of the present invention.
在所有附图中，同样的附图标记表示相同的技术特征，具体为：1-螺栓、2-复合电绝缘垫圈、3-复合电绝缘垫片、4-保护管、5-螺母、6-偏平垫圈、7-法兰、8-防腐蚀增设管路、9-海水系统管路。In all the drawings, the same reference numerals represent the same technical features, specifically: 1-bolt, 2-composite electrical insulating gasket, 3-composite electrical insulating gasket, 4-protective tube, 5-nut, 6-flat gasket, 7-flange, 8-anti-corrosion additional pipeline, 9-seawater system pipeline.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
连接法兰处异种金属(不同牌号的同质材料，如304与304L不锈钢，也判定为异种金属)连接的部位应采取异种金属连接腐蚀防护措施。异种金属连接条件下，一般的，管路与管路或管路与设备之间连接时，按工艺要求直接进行绝缘处理即可；但当管路或设备与船体结构、主管路等全寿命结构连接时，除了进行异种金属绝缘处理外，还要在两者之间增加一段管路作为牺牲管段。Dissimilar metal connection corrosion protection measures should be taken at the connection flange where dissimilar metals (different grades of homogeneous materials, such as 304 and 304L stainless steel, are also considered dissimilar metals) are connected. Under dissimilar metal connection conditions, generally, when connecting pipelines to pipelines or pipelines to equipment, insulation treatment can be directly performed according to process requirements; but when pipelines or equipment are connected to full-life structures such as hull structures and main pipelines, in addition to dissimilar metal insulation treatment, a section of pipeline must be added between the two as a sacrificial pipe section.
本发明实施例中的异种金属连接腐蚀防护结构及使用的材料主要包括绝缘磁漆、复合电绝缘垫片、紧固件及复合电绝缘垫圈、密封胶等。The dissimilar metal connection corrosion protection structure and the materials used in the embodiment of the present invention mainly include insulating enamel, composite electrical insulating gaskets, fasteners and composite electrical insulating washers, sealants, etc.
舰船异种金属管系连接腐蚀防护工艺是主要针对海水系统管路异种金属接触腐蚀问题而增加的电绝缘防护措施，原则上应用于海水异种金属管系连接部位，包括法兰式、座板式、对夹式连接结构，同时也可应用于任何具有电绝缘要求的法兰连接结构。The corrosion protection process for shipboard dissimilar metal piping connections is an electrical insulation protection measure mainly aimed at the problem of dissimilar metal contact corrosion in seawater system pipelines. In principle, it is applied to the connection parts of seawater dissimilar metal piping systems, including flange type, seat plate type, and clamp type connection structures. It can also be applied to any flange connection structure with electrical insulation requirements.
典型法兰式、座板式、对夹式连接结构示例如图1-3所示，该异种金属连接结构包括螺栓1、复合电绝缘垫圈2、复合电绝缘垫片3、保护管4、螺母5及平垫圈6。其中，两个法兰7接口之间设有复合电绝缘垫片3，法兰7的外圆周开设有通孔，用于安装螺栓1，螺栓1与该通孔之间设有保护管4，螺栓1的两端设有螺母5，螺母5与法兰7之间设有复合电绝缘垫圈2及平垫圈6，且复合电绝缘垫圈2及平垫圈6套设于螺栓1上。Typical flange type, seat plate type, and clamp type connection structure examples are shown in Figures 1-3. The dissimilar metal connection structure includes bolts 1, composite electrical insulating washers 2, composite electrical insulating washers 3, protective tubes 4, nuts 5, and flat washers 6. Among them, a composite electrical insulating washers 3 is provided between the two flange 7 interfaces, a through hole is provided on the outer circumference of the flange 7 for installing the bolt 1, a protective tube 4 is provided between the bolt 1 and the through hole, nuts 5 are provided at both ends of the bolt 1, composite electrical insulating washers 2 and flat washers 6 are provided between the nut 5 and the flange 7, and the composite electrical insulating washers 2 and flat washers 6 are sleeved on the bolt 1.
绝缘垫片宜采用复合电绝缘垫片，复合电绝缘垫片的型号为：HGJYDP-10型，其性能满足绝缘法兰(座板)及各系统的要求，其电绝缘性能指标不低于500KΩ。Insulating gaskets should adopt composite electrical insulating gaskets. The model of composite electrical insulating gaskets is: HGJYDP-10. Its performance meets the requirements of insulating flanges (seat plates) and various systems, and its electrical insulation performance index is not less than 500KΩ.
管系绝缘组件的安装：a.将紧固螺栓浸入磁漆或清漆；b.在浸有磁漆的紧固螺栓上套入绝缘套筒，使绝缘套筒与螺柱根部贴紧；c.在绝缘套筒上套入金属保护垫圈；d.在绝缘套筒套入绝缘复合垫圈；e.将绝缘紧固件穿过法兰孔；f.套入绝缘复合垫圈；g.套入金属保护垫圈；h.拧上螺母；i.对绝缘组件进行预紧。Installation of pipe insulation components: a. Immerse the fastening bolts in enamel or varnish; b. Slide the insulating sleeve over the fastening bolts soaked in enamel, so that the insulating sleeve is in close contact with the root of the stud; c. Slide the metal protective gasket over the insulating sleeve; d. Slide the insulating composite gasket into the insulating sleeve; e. Pass the insulating fastener through the flange hole; f. Slide the insulating composite gasket; g. Slide the metal protective gasket; h. Tighten the nut; i. Pre-tighten the insulation component.
紧固件及其绝缘零件的技术要求应满足《舰船防腐防漏系列技术要求》的规定。根据安装形式的不同，紧固件及其绝缘零件可分为法兰式紧固件及其绝缘零件、对夹式紧固件及其绝缘零件和座板式紧固件及其绝缘零件。The technical requirements for fasteners and their insulating parts should meet the requirements of the "Technical Requirements for Ship Anti-corrosion and Anti-leakage". According to the different installation forms, fasteners and their insulating parts can be divided into flange fasteners and their insulating parts, clamp-type fasteners and their insulating parts, and seat plate fasteners and their insulating parts.
A型紧固件及其绝缘零件连接尺寸满足GB569-65《船用法兰连接尺寸和密封面》的要求。B型紧固件及其绝缘零件连接尺寸满足GB2501-89《船用法兰连接尺寸和密封面(四进位)》的要求。The connection dimensions of type A fasteners and their insulating parts meet the requirements of GB569-65 "Marine flange connection dimensions and sealing surfaces". The connection dimensions of type B fasteners and their insulating parts meet the requirements of GB2501-89 "Marine flange connection dimensions and sealing surfaces (four-position)".
紧固件及其绝缘零件按紧固件的材料可分为不锈钢及碳钢，紧固件的配置原则上使用配套的紧固件，选用规格较常规小一档，强度等级提升一级，也可根据绝缘处理需要使用定制的紧固件和绝缘零件。具体的组成及技术要求参见表1。Fasteners and their insulating parts can be divided into stainless steel and carbon steel according to the material of the fasteners. In principle, matching fasteners are used in the configuration of fasteners, and the specifications are selected to be one level smaller than the conventional ones, and the strength level is increased by one level. Customized fasteners and insulating parts can also be used according to the needs of insulation treatment. See Table 1 for specific composition and technical requirements.
表1紧固件及其绝缘零件组成及技术要求Table 1 Composition and technical requirements of fasteners and their insulating parts
作为本发明的进一步的改进，法兰7接口与复合电绝缘垫片3之间、保护管4与螺栓1之间、螺母5与复合电绝缘垫圈2之间均涂覆磁漆，确保各接触面之间绝缘。As a further improvement of the present invention, magnetic paint is coated between the flange 7 interface and the composite electrical insulating gasket 3, between the protective tube 4 and the bolt 1, and between the nut 5 and the composite electrical insulating gasket 2 to ensure insulation between the contact surfaces.
作为本发明的进一步的改进，在潮湿环境下所述螺栓和螺母包覆密封胶或在海水环境下所述腐蚀防护结构整体包覆密封胶，避免了舰船异种金属在海水环境或潮湿环境的电化学腐蚀。As a further improvement of the present invention, the bolts and nuts are coated with sealant in a humid environment or the corrosion protection structure is entirely coated with sealant in a seawater environment, thereby avoiding electrochemical corrosion of dissimilar metals of the ship in a seawater environment or a humid environment.
作为本发明的进一步的改进，异种金属绝缘处理时，连接螺栓与绝缘套筒之间应灌注绝缘胶；灌注的绝缘胶应以浸涂的方式完全覆盖紧固件的连接处。绝缘性能应满足绝缘法兰(座板)的要求，其电绝缘性能指标不低于500KΩ。As a further improvement of the present invention, when the dissimilar metals are insulated, insulating glue should be poured between the connecting bolts and the insulating sleeve; the poured insulating glue should completely cover the connection of the fasteners by dipping. The insulation performance should meet the requirements of the insulating flange (seat plate), and its electrical insulation performance index should not be less than 500KΩ.
如前所述，当管路或设备与船体结构、主管路等全寿命结构连接时，为了保护船体或主管路，对其连接结构除了进行异种金属绝缘处理外，还要在两者之间增加一段与低电位金属管路材质相同的管路作为牺牲管段，牺牲管段长度取5-8倍的管路通径。As mentioned above, when pipelines or equipment are connected to full-life structures such as hull structures and main pipes, in order to protect the hull or main pipes, in addition to the insulation treatment of dissimilar metals on the connection structure, a section of pipeline made of the same material as the low-potential metal pipeline should be added between the two as a sacrificial pipe section. The length of the sacrificial pipe section should be 5-8 times the pipeline diameter.
(1)与船体直接连接的情况(1) Direct connection to the hull
当海水系统设备与船体结构直接连接时，应在系统管路上距离设备进、出口取5-8倍通径法兰(座板)连接处增加布置异种金属连接腐蚀防护措施，并增加一段防腐牺牲管段(后期需视情更换)，具体防护措施详见图4。When the seawater system equipment is directly connected to the hull structure, additional corrosion protection measures for dissimilar metal connections should be arranged at the flange (seat plate) connection 5-8 times the diameter of the equipment inlet and outlet on the system pipeline, and an anti-corrosion sacrificial pipe section should be added (which needs to be replaced later depending on the situation). Specific protection measures are detailed in Figure 4.
如图4所示，设备进出口法兰7，材料为耐海水腐蚀材料，电位值较高，防腐蚀增设管路8的材料一般为钢质，电位值最低，海水系统管路9的材料为B10铜镍合金、双相不锈钢或紫铜等，电位值高。As shown in FIG4 , the inlet and outlet flanges 7 of the equipment are made of seawater corrosion-resistant material with a relatively high potential value. The material of the anti-corrosion additional pipeline 8 is generally steel with the lowest potential value. The material of the seawater system pipeline 9 is B10 copper-nickel alloy, duplex stainless steel or copper, etc. with a high potential value.
其中，海水系统设备的进出口的法兰7与防腐蚀增设管路8的连接处布置异种金属连接腐蚀防护措施；防腐蚀增设管路8与海水系统管路9的连接处布置异种金属连接腐蚀防护措施；异种金属连接腐蚀防护措施应满足前述“常规情况下的绝缘处理要求”，其中防腐蚀增设管路8的绝缘磁漆不可全部涂覆，可为弯管，长度L＝5-8L1；防腐蚀增设管路8应布置在易于检查维修的部位，且在此防腐蚀增设管路上一般不设置管路吊架，若必须设置时，应在吊架的内箍圈内铺上绝缘垫片，绝缘垫片厚度不小于4mm，向一侧凸出10mm。Among them, the connection between the flange 7 of the inlet and outlet of the seawater system equipment and the anti-corrosion additional pipeline 8 is arranged with dissimilar metal connection corrosion protection measures; the connection between the anti-corrosion additional pipeline 8 and the seawater system pipeline 9 is arranged with dissimilar metal connection corrosion protection measures; the dissimilar metal connection corrosion protection measures shall meet the aforementioned "insulation treatment requirements under normal circumstances", wherein the insulating enamel of the anti-corrosion additional pipeline 8 shall not be fully coated, and it may be a curved pipe with a length of L=5-8L1; the anti-corrosion additional pipeline 8 shall be arranged in a position that is easy to inspect and maintain, and generally no pipeline hanger is set on this anti-corrosion additional pipeline. If it must be set, an insulating gasket shall be laid in the inner hoop of the hanger, the thickness of the insulating gasket shall not be less than 4mm, and it shall protrude 10mm to one side.
(2)与液舱内海水管系直接连接的情况(2) Direct connection with the seawater piping system in the tank
对于与液舱内海水管系通舱件连接的情况，应在液舱外系统管路上距离该通舱件在5-8倍通径法兰(座板)连接处增加布置异种金属连接腐蚀防护措施，并增加一段钢质牺牲管段(后期需视情更换)，具体防护措施详见图5。For the connection with the seawater piping system through-tank fittings in the liquid tank, additional corrosion protection measures for dissimilar metal connections should be arranged at the connection of the flange (seat plate) 5-8 times the diameter of the through-tank fittings on the system pipeline outside the liquid tank, and an additional steel sacrificial pipe section (which needs to be replaced later depending on the situation). Specific protection measures are detailed in Figure 5.
如图5所示，设备进出口法兰7，期材料为耐海水腐蚀材料，电位值较高，防腐蚀增设管路8的材料一般为钢质，电位值最低，海水系统管路9的材料为B10铜镍合金、双相不锈钢或紫铜等，电位值高。As shown in FIG5 , the inlet and outlet flanges 7 of the equipment are made of seawater corrosion-resistant material with a relatively high potential value. The material of the anti-corrosion additional pipeline 8 is generally steel with the lowest potential value. The material of the seawater system pipeline 9 is B10 copper-nickel alloy, duplex stainless steel or copper, etc. with a high potential value.
具体而言，设备进出口法兰7连接件的安装形式应满足轻围壁、水密、耐火舱壁穿舱的要求；法兰7与防腐蚀增设管路8连接处应布置异种金属连接腐蚀防护措施；防腐蚀增设管路8与海水系统管路9连接处布置异种金属连接腐蚀防护措施；异种金属连接腐蚀防护措施应满足前述“常规情况下的绝缘处理要求”，其中防腐蚀增设管路8绝缘磁漆不可全部涂覆，可为弯管，长度L＝5-8L1；防腐蚀增设管路8应布置在易于检查维修的部位，且在此防腐蚀增设管路上一般不设置管路吊架，若必须设置时，并在吊架的内箍圈内铺上绝缘垫片，绝缘垫片厚度不小于4mm，向一侧凸出10mm。Specifically, the installation form of the equipment inlet and outlet flange 7 connectors should meet the requirements of light enclosure, watertight, and fire-resistant bulkhead penetration; dissimilar metal connection corrosion protection measures should be arranged at the connection between flange 7 and the anti-corrosion additional pipeline 8; dissimilar metal connection corrosion protection measures should be arranged at the connection between the anti-corrosion additional pipeline 8 and the seawater system pipeline 9; dissimilar metal connection corrosion protection measures should meet the aforementioned "insulation treatment requirements under normal circumstances", among which the anti-corrosion additional pipeline 8 cannot be fully coated with insulating enamel, and can be a curved pipe with a length of L = 5-8L1; the anti-corrosion additional pipeline 8 should be arranged in a position that is easy to inspect and maintain, and generally no pipeline hanger is set on this anti-corrosion additional pipeline. If it must be set, an insulating gasket shall be laid in the inner hoop of the hanger, the thickness of the insulating gasket shall not be less than 4mm, and it shall protrude 10mm to one side.
(3)与其他管路连接的情况(3) Connection with other pipelines
在异种金属绝缘处理的同时搭配增设牺牲管路的处理措施，不限于以上描述的两类典型情况，同样可应用于保护船舶底部附件、舷侧附件，并可根据实际情况进行适应性调整。The treatment measures of adding sacrificial pipelines in conjunction with the insulation treatment of dissimilar metals are not limited to the two typical situations described above, but can also be applied to protect the bottom and side accessories of the ship, and can be adaptively adjusted according to actual conditions.
本发明实施例一种舰船异种金属管系连接腐蚀防护施工方法，异种金属连接腐蚀防护方法主要内容包括：使用复合电绝缘垫片隔离管系对接法兰(或座板)面和紧固件，切断异种金属接触产生的电子通道；在绝缘套筒和紧固螺栓(或其他紧固件)之间灌注绝缘胶；在海水环境或潮湿环境下对连接结构整体包覆密封胶(包括涂覆紧固螺母)；在异种金属管路连接结构及结构两端一定范围内的管路内外壁涂覆绝缘磁漆，增加异种金属接头处两端管系内海水之间的电阻，隔断海水内的离子通道。An embodiment of the present invention provides a method for corrosion protection of ship dissimilar metal pipe system connections. The main contents of the dissimilar metal connection corrosion protection method include: using a composite electrical insulating gasket to isolate the pipe system docking flange (or seat plate) surface and fasteners, cutting off the electronic channel generated by the contact of dissimilar metals; pouring insulating glue between the insulating sleeve and the fastening bolts (or other fasteners); coating the entire connection structure with sealant (including coating fastening nuts) in a seawater environment or a humid environment; coating the inner and outer walls of the dissimilar metal pipe connection structure and the pipes within a certain range at both ends of the structure with insulating varnish, increasing the resistance between the seawater in the pipes at both ends of the dissimilar metal joint, and cutting off the ion channel in the seawater.
具体包括如下步骤：The specific steps include:
1.准备工作1. Preparation
(1)船舶修理时将需增加配置异种金属连接腐蚀防护措施(绝缘磁漆涂覆)的管系，送至内场(车间)；新造船舶完成管路的加工制作后送至内场(车间)。(1) When repairing a ship, the piping system that needs to be equipped with corrosion protection measures for dissimilar metal connections (insulating enamel coating) will be sent to the inner yard (workshop); the newly built ship will be sent to the inner yard (workshop) after the processing and manufacturing of the piping is completed.
(2)检查管系的表面清洁度等满足绝缘磁漆涂覆的要求。(2) Check the surface cleanliness of the pipe system to ensure it meets the requirements for insulating varnish coating.
(3)检查环境要求(温度、湿度等)满足绝缘磁漆涂覆的要求(3) Check that the environmental requirements (temperature, humidity, etc.) meet the requirements for insulating enamel coating
(4)检查内场(车间)照明、通风条件、作业区周边环境情况，安全防护措施到位。(4) Check the lighting and ventilation conditions in the workshop and the surrounding environment of the work area, and ensure that safety protection measures are in place.
(5)负责加工的人员，做好防护措施，做到身体健康和重量两不误。(5) Personnel responsible for processing should take protective measures to ensure both good health and good weight.
2.绝缘磁漆现场调配2. On-site preparation of insulating enamel
绝缘磁漆由A、B两种组分组成。调配时，将A:B两种组分按8:1～10:1配比，称重后混合于容器中；在30°～50°度恒定温度下，调置搅拌机转速为600转/分钟，搅拌15分钟，然后停止搅拌，适度加温，使油漆温度提升至60度左右，然后静置20(夏天)-30(冬天)分钟，待油漆温度降至室温后用400目以上的滤网过滤。配置好的绝缘磁漆建议一次性使用完，如果在使用的过程中，磁漆变得粘稠，可视情况在油漆中加入10-40％的磁漆稀释剂，搅拌均匀后，继续使用。调配出来的磁漆要求在两、三个小时内使用完毕。Insulating enamel consists of two components, A and B. When mixing, mix the two components A and B in a ratio of 8:1 to 10:1, weigh and mix them in a container; at a constant temperature of 30° to 50°, set the mixer speed to 600 rpm, stir for 15 minutes, then stop stirring, heat appropriately to raise the paint temperature to about 60 degrees, then let it stand for 20 (in summer) -30 (in winter) minutes, and filter it with a filter of 400 mesh or more after the paint temperature drops to room temperature. It is recommended to use the prepared insulating enamel at one time. If the enamel becomes viscous during use, add 10-40% of enamel thinner to the paint as needed, stir evenly, and continue to use it. The prepared enamel is required to be used up within two or three hours.
3.管路和连接件的绝缘磁漆的涂覆3. Coating of insulating enamel on pipes and connectors
根据绝缘磁漆的技术要求进行涂覆，涂层要求均匀，涂层厚度应不低于300μm，不能剥落和存在其它缺陷。绝缘涂料的技术要求如下：The coating shall be carried out according to the technical requirements of the insulating enamel. The coating shall be uniform and the coating thickness shall not be less than 300μm. It shall not peel off or have other defects. The technical requirements of the insulating coating are as follows:
(1)安全要求(1) Safety requirements
绝缘磁漆的存放应满足油漆存放的相关安全技术要求。磁漆涂装工作应安排在内场进行，安全防护到位，配备灭火、水、电、管路涂漆晾干用置物架等基本设施；场地照明、通风良好，不允许出现风、雨、油污等有害因素侵袭，环境温度尽可能保持在25度至40度之间，湿度等参数要求可参考其他油漆的一般要求。施工人员戴橡胶手套，穿工作服，并具备必要的个人防护措施。涂装工作完成后应做好个人及环境的清洁工作。The storage of insulating enamel should meet the relevant safety and technical requirements for paint storage. The enamel painting work should be arranged in the inner field, with safety protection in place, equipped with basic facilities such as fire extinguishing, water, electricity, and racks for drying pipeline paint; the site should be well lit and ventilated, and no harmful factors such as wind, rain, and oil pollution should be allowed to invade. The ambient temperature should be kept between 25 and 40 degrees as much as possible. The parameters such as humidity can refer to the general requirements of other paints. Construction workers should wear rubber gloves, work clothes, and have necessary personal protection measures. After the painting work is completed, personal and environmental cleaning should be done.
(2)清洁度要求(2) Cleanliness requirements
绝缘磁漆的型号为：HGCQ-10型，其涂覆对于管路表面清洁度要求：管路涂覆前，应对管路表面进行适度打磨、清洁处理，处理后表面无污渍、油脂、金属碎屑、灰尘等。The model of insulating enamel is HGCQ-10, and its coating has the following requirements for the cleanliness of the pipeline surface: Before coating the pipeline, the pipeline surface should be properly polished and cleaned, and after treatment, the surface should be free of stains, grease, metal debris, dust, etc.
(3)磁漆涂覆方法及一般过程(3) Magnet coating method and general process
可采用刷涂、浸涂或喷涂的方法对管路涂覆绝缘磁漆，均要求油漆厚度均匀。刷涂时，涂覆2～3次，间隔20～30分钟，对湿度较大、温度较低的环境，也可等第一道漆表干后，再涂刷第二道漆，然后静置、晾干。浸涂、喷涂的要求与刷涂基本一致，但管路在浸涂、提起后，必须用刷子刷掉管路上多余的油漆，防止漆膜过厚。Insulating enamel can be applied to pipelines by brushing, dipping or spraying, and the paint thickness is required to be uniform. When brushing, apply 2 to 3 times, with an interval of 20 to 30 minutes. For environments with high humidity and low temperature, you can also wait for the first coat of paint to dry before applying the second coat of paint, and then let it stand and dry. The requirements for dipping and spraying are basically the same as those for brushing, but after dipping and lifting the pipeline, the excess paint on the pipeline must be brushed off with a brush to prevent the paint film from being too thick.
(4)磁漆涂覆范围(4) Magnetic paint coating range
绝缘磁漆涂覆在连接件及其连接管段的内外表面上(连接件密封槽亦涂覆)。当需要对涂漆后的管路进行油漆修补时，可在油漆缺损部位喷涂或刷涂绝缘磁漆或绝缘清漆。绝缘清漆的技术要求同绝缘磁漆。Insulating enamel is coated on the inner and outer surfaces of the connector and its connecting pipe section (the connector sealing groove is also coated). When it is necessary to repair the painted pipeline with paint, insulating enamel or insulating varnish can be sprayed or brushed on the paint defective part. The technical requirements of insulating varnish are the same as those of insulating enamel.
不带氧化涂层的异种金属管路连接时，连接法兰处的两端管路均需涂覆绝缘磁漆。除连接件(如法兰、座板)需全部涂覆外，管路内外表面绝缘磁漆涂覆长度与管系的通径关系见表1。When connecting dissimilar metal pipes without oxidation coating, both ends of the pipes at the connection flange need to be coated with insulating enamel. In addition to the connection parts (such as flanges and seat plates) that need to be fully coated, the relationship between the length of the insulating enamel coating on the inner and outer surfaces of the pipe and the diameter of the pipe system is shown in Table 1.
表1管路内外表面磁漆涂覆长度与管路通径的关系Table 1 Relationship between the length of enamel coating on the inner and outer surfaces of the pipeline and the diameter of the pipeline
当异种金属连接法兰的一端为阀件、附件或设备，一端为连接管路时，两端均需涂覆绝缘磁漆。管路的涂覆长度要求见表1，阀件、附件及设备的涂覆长度应根据实际情况尽量实施。When one end of the dissimilar metal connection flange is a valve, accessory or equipment, and the other end is a connecting pipeline, both ends need to be coated with insulating enamel. The coating length requirements for pipelines are shown in Table 1. The coating length of valves, accessories and equipment should be implemented as much as possible according to actual conditions.
(5)其他要求(5) Other requirements
绝缘磁漆的涂层要求均匀，不能剥落和存在其它缺陷。经过氧化处理的特种合金管(如铝合金管)的连接件及管段，不需要涂覆绝缘磁漆；管系内表面进行涂塑处理后，内表面不需要涂覆绝缘磁漆；管系内表面进行钝化处理后，内表面不需要涂覆绝缘磁漆。The coating of insulating enamel must be uniform and must not peel or have other defects. The connectors and pipe sections of special alloy pipes (such as aluminum alloy pipes) that have been oxidized do not need to be coated with insulating enamel; the inner surface of the pipe system does not need to be coated with insulating enamel after plastic coating; the inner surface of the pipe system does not need to be coated with insulating enamel after passivation.
4.绝缘磁漆涂装后管系完成后续加工制造4. After the insulating enamel coating, the pipe system completes the subsequent processing and manufacturing
根据管系的加工制造要求完成后续工作。Complete subsequent work according to the processing and manufacturing requirements of the piping system.
5.管系上船5. Pipeline on board
安装前，要检查管路、阀件等部件的磁漆涂覆质量，密封面的油漆要求平整光滑，其上不能有污渍、油脂、金属碎屑或其它杂质。如果油漆表面出现破损、剥落、突起或其他缺陷，要进行打磨、清洁、补漆。管路或设备表面油漆质量检测合格后，搬运前，应采用弹性保护材料对油漆面进行包覆，保护涂层，防止在运送和安装过程出现磕碰、投掷等问题。Before installation, check the quality of the enamel coating on the pipeline, valves and other parts. The paint on the sealing surface must be flat and smooth, and there must be no stains, grease, metal debris or other impurities on it. If the paint surface is damaged, peeling, protruding or other defects, it must be polished, cleaned and repainted. After the paint quality inspection of the pipeline or equipment surface is qualified, before transportation, the paint surface should be covered with elastic protective materials to protect the coating and prevent bumps, throwing and other problems during transportation and installation.
6.复合电绝缘垫片、紧固件及其绝缘零件、紧固件绝缘胶的准备、安装6. Preparation and installation of composite electrical insulating gaskets, fasteners and their insulating parts, and fastener insulating glue
管路安装前，应对复合电绝缘垫片、紧固件及其绝缘零件、紧固件绝缘胶组成进行外观检查，特别是复合电绝缘垫片及绝缘零件(衬套、管套)，发现有破损或变形应及时修理或更换；复合电绝缘垫片表面不允许存在污渍、油脂、金属碎屑或其它杂质，但允许打磨再涂漆。Before installing the pipeline, the composite electrical insulating gaskets, fasteners and their insulating parts, and the fastener insulating glue components should be visually inspected, especially the composite electrical insulating gaskets and insulating parts (bushings, pipe sleeves). If they are damaged or deformed, they should be repaired or replaced in time; stains, grease, metal debris or other impurities are not allowed on the surface of the composite electrical insulating gasket, but grinding and painting are allowed.
7.安装后的检查7. Post-installation inspection
(1)外观检查(1) Appearance inspection
完成紧固件的安装后进行检查绝缘漆面，视情修补；修补时用绝缘清漆修补，绝缘清漆应在内场调配。After completing the installation of the fasteners, check the insulating paint surface and repair it as needed; use insulating varnish when repairing, and the insulating varnish should be mixed in the field.
(2)电绝缘性能检查(2) Electrical insulation performance inspection
1)绝缘性能测量方法1) Insulation performance measurement method
安装异种金属连接腐蚀防护措施连接件的绝缘性能根据总体所及《舰船防腐防漏工作管理规定》21项技术要求进行检查。The insulation performance of connectors for installing corrosion protection measures for dissimilar metal connections is checked according to the overall and 21 technical requirements of the "Regulations on the Management of Ship Anti-corrosion and Anti-leakage Work".
2)测量前的准备工作2) Preparation before measurement
为了保证测量的准确性，要求将测量点进行打磨工作，直到露出金属光泽。In order to ensure the accuracy of the measurement, the measuring point is required to be polished until the metallic luster is exposed.
3)干式状态、湿式状态及完全沉浸液体的沉浸状态绝缘检测设备要求3) Requirements for insulation testing equipment in dry, wet and fully immersed liquid states
a.管系中尚未注水的干态情况下(俗称“干式状态”)，采用100V/250V/500V摇表或HGJC-01型专用电绝缘监测设备进行测量。a. In the dry state where water has not yet been injected into the pipe system (commonly known as the "dry state"), use a 100V/250V/500V megohmmeter or HGJC-01 special electrical insulation monitoring equipment for measurement.
b.浸泡海水之后的潮湿情况下(俗称“湿式状态”)，排空管路内水介质，采用10V-25V的摇表或HGJC-01型专用电绝缘监测设备进行测量；然后用压缩空气吹除管路，再次测量绝缘值。b. In the wet state after soaking in seawater (commonly known as "wet state"), drain the water medium in the pipeline and use a 10V-25V megohmmeter or HGJC-01 special electrical insulation monitoring equipment for measurement; then blow out the pipeline with compressed air and measure the insulation value again.
c.完全沉浸液体的湿态情况下(俗称“沉浸状态”)，排空管路内水介质，采用HGJC-01型专用电绝缘监测设备进行测量；然后用压缩空气吹除管路，再次测量绝缘值。c. In the wet state where the pipe is completely immersed in liquid (commonly known as the "immersion state"), drain the water medium in the pipe and use the HGJC-01 special electrical insulation monitoring equipment to measure; then blow out the pipe with compressed air and measure the insulation value again.
4)电绝缘测量判定值4) Electrical insulation measurement judgment value
“干式状态”阻值应不低于10kΩ。如所测的绝缘电阻值大于10KΩ，则说明绝缘性能是满足防腐要求的。如果绝缘阻值低于标准，则说明缘性能是不满足防腐要求的。The "dry state" resistance should not be less than 10kΩ. If the measured insulation resistance value is greater than 10KΩ, it means that the insulation performance meets the anti-corrosion requirements. If the insulation resistance value is lower than the standard, it means that the insulation performance does not meet the anti-corrosion requirements.
“湿式状态”和“沉浸状态”下，排空管路内水介质后，若没用压缩空气吹除管路，对于HGJC-01型电绝缘监测仪所测湿态电阻在1欧左右，或电位为零的连接头，需要拆开接头检查并重新安装，直到满足要求为止。如若使用压缩空气吹除过管路，对于HGJC-01型电绝缘监测仪所测湿态电阻小于1千欧的连接头，需要拆开接头检查并重新安装，直到满足要求为止。In the "wet state" and "immersion state", after draining the water medium in the pipeline, if the pipeline is not blown out with compressed air, for the connectors with a wet resistance of about 1 ohm or a potential of zero measured by the HGJC-01 electrical insulation monitor, it is necessary to disassemble the connectors for inspection and reinstall until the requirements are met. If the pipeline is blown out with compressed air, for the connectors with a wet resistance of less than 1 kiloohm measured by the HGJC-01 electrical insulation monitor, it is necessary to disassemble the connectors for inspection and reinstall until the requirements are met.
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711216646.3A CN107795774B (en) | 2017-11-28 | 2017-11-28 | Corrosion protection structure and construction method for connecting dissimilar metal pipes on ships |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711216646.3A CN107795774B (en) | 2017-11-28 | 2017-11-28 | Corrosion protection structure and construction method for connecting dissimilar metal pipes on ships |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107795774A CN107795774A (en) | 2018-03-13 |
| CN107795774B true CN107795774B (en) | 2024-08-06 |
Family
ID=61536964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711216646.3A Active CN107795774B (en) | 2017-11-28 | 2017-11-28 | Corrosion protection structure and construction method for connecting dissimilar metal pipes on ships |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107795774B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612502A (en) * | 2018-04-23 | 2018-10-02 | 刘洪俊 | A kind of production tree easy to assembly, fixation and operating method |
| US11339823B2 (en) * | 2018-08-09 | 2022-05-24 | J.S.T. Corporation | System and method for sealing a metal fastener from electrolyte in an area of dissimilar metals |
| IT201900005528A1 (en) * | 2019-04-10 | 2020-10-10 | Tecnoseal Foundry S R L | A method for eliminating the problem of corrosion in the coupling of two metal bodies, preferably of the flanged type |
| CN110410595B (en) * | 2019-07-25 | 2020-12-29 | 湖北省水利水电规划勘测设计院 | A kind of loose sleeve force transmission insulating flange and its surface crack detection method |
| CN113339598A (en) * | 2021-06-04 | 2021-09-03 | 舟山长宏国际船舶修造有限公司 | Novel outboard pipe |
| CN113898802A (en) * | 2021-10-26 | 2022-01-07 | 中船黄埔文冲船舶有限公司 | Anti-corrosion flange connecting structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205781550U (en) * | 2016-06-27 | 2016-12-07 | 永嘉县特富隆防腐设备有限公司 | A kind of anti-corrosion pipeline attachment structure |
| CN205824493U (en) * | 2016-07-19 | 2016-12-21 | 上海阿勒法船舶设备有限公司 | A kind of boats and ships topside pollution discharge anticorrosion device |
| CN205842036U (en) * | 2016-06-23 | 2016-12-28 | 上海阿勒法船舶设备有限公司 | One prevents dissimilar metal from connecting and produces electrochemical corrosion insulation assembly |
| CN207514444U (en) * | 2017-11-28 | 2018-06-19 | 中国人民解放军海军工程大学 | Naval vessel dissimilar metal piping junction corrosion safeguard structure |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3014158A1 (en) * | 1979-04-19 | 1980-10-30 | John J Hunter | METHOD FOR LINING THE OPEN END OF A TUBE AND PIPE CONNECTION |
| KR200181300Y1 (en) * | 1999-12-13 | 2000-05-15 | 포항종합제철주식회사 | Protecting system from galvanic corrosion in flange coupling |
| NL1037432C2 (en) * | 2009-11-02 | 2011-05-03 | C C Rombouts Kunststof Techniek Holding B V | METHOD FOR LOCKING A CONNECTION BETWEEN TWO TUBES. |
| CN202107770U (en) * | 2011-09-29 | 2012-01-11 | 中国船舶重工集团公司第七一九研究所 | Electric insulation structure for pipelines |
| CN204004920U (en) * | 2013-12-25 | 2014-12-10 | 保定天威保变电气股份有限公司 | A kind of high-power transformer cooling unit union insulation system |
| DE102014213119A1 (en) * | 2014-07-07 | 2016-01-07 | Schaeffler Technologies AG & Co. KG | Arrangement for the detachable connection of a flange element with a housing element |
| CN206191098U (en) * | 2016-08-09 | 2017-05-24 | 北京艾路浦科技发展有限公司 | Cup -shaped tube coupling anticorrosives |
| CN206145315U (en) * | 2016-11-10 | 2017-05-03 | 广州华尔法密封机械有限公司 | Electric insulation sleeve subassembly that dissimilar metal connects and mounting structure thereof |
| CN206487994U (en) * | 2017-02-17 | 2017-09-12 | 中国石油天然气集团公司 | Pipeline yard and the insulation seal device of valve chamber flange form instrumentation connection |
-
2017
- 2017-11-28 CN CN201711216646.3A patent/CN107795774B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205842036U (en) * | 2016-06-23 | 2016-12-28 | 上海阿勒法船舶设备有限公司 | One prevents dissimilar metal from connecting and produces electrochemical corrosion insulation assembly |
| CN205781550U (en) * | 2016-06-27 | 2016-12-07 | 永嘉县特富隆防腐设备有限公司 | A kind of anti-corrosion pipeline attachment structure |
| CN205824493U (en) * | 2016-07-19 | 2016-12-21 | 上海阿勒法船舶设备有限公司 | A kind of boats and ships topside pollution discharge anticorrosion device |
| CN207514444U (en) * | 2017-11-28 | 2018-06-19 | 中国人民解放军海军工程大学 | Naval vessel dissimilar metal piping junction corrosion safeguard structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107795774A (en) | 2018-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107795774B (en) | Corrosion protection structure and construction method for connecting dissimilar metal pipes on ships | |
| CN100419035C (en) | Anticorrosion coating paint for pipeline and preparation method thereof | |
| CN206990275U (en) | A kind of marine ballasting waterpipe probe tube | |
| CN107061929A (en) | Steel circulating water pipe anti-corrosion method | |
| CN202278789U (en) | Anti-corrosive compound coating with abrasion resistance and high-temperature resistance for steel structure sprayed with stainless steel | |
| CN207514444U (en) | Naval vessel dissimilar metal piping junction corrosion safeguard structure | |
| CN104946097B (en) | A kind of low temperature non-stick vaseline anti-corrosion plaster | |
| CN103289608B (en) | Oxidative polymerization type rust-proof anti-corrosion adhesive paste | |
| CN208431250U (en) | Fixed structure and signal tower | |
| Guirong et al. | Failure process of epoxy coating subjected test of alternating immersion in artificial seawater and dry in air | |
| Yoo et al. | Influence of cathodic protection on the lifetime extension of painted steel structures | |
| CN105001775B (en) | A kind of non-stick vaseline anti-corrosion plaster | |
| CN111992474B (en) | A method for fully coating the inner wall of a small-diameter straight pipe or a special-shaped metal pipeline with anti-corrosion paint | |
| CN104696654A (en) | A corrosion-resistant tee | |
| CN111408532A (en) | Corrosion prevention method for ship desulfurization device exhaust side outer pipe and obtained exhaust side outer pipe | |
| CN209909332U (en) | Environment-friendly corrosion-resistant pipeline for liquid | |
| CN221644831U (en) | Repairing coating structure for cracking steel coating | |
| CN111004988A (en) | Flange surface treatment method | |
| CN217383133U (en) | High-temperature-resistant air conditioner for aging room | |
| CN207020056U (en) | Coating experimental rig and coating testing equipment | |
| JP3231615U (en) | Connection nut set | |
| CN204073576U (en) | One has the marine seawater filter of resistance to corrosion-resistant | |
| CN116790180A (en) | A rust-bearing anti-corrosion coating and its preparation method and application | |
| CN210566756U (en) | Corrosion-resistant seamless stainless steel pipe | |
| CN209164007U (en) | Wind turbine tower anti-corrosion coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Zhuying Inventor after: Li Haitao Inventor after: Zhang Xiaodong Inventor after: Liu Ye Inventor after: Jing Wangda Inventor after: Zhao Ya Inventor after: Cao Wenkang Inventor before: Li Zhuying Inventor before: Li Haitao Inventor before: Zhang Xiaodong Inventor before: Qian Yongxin Inventor before: Liu Jing Inventor before: Liu Ye Inventor before: Jing Wangda Inventor before: Zhao Ya Inventor before: Cao Wenkang |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20250225 Address after: 430033 Hubei province in Qiaokou District of Wuhan City Jiefang Road No. 717 Patentee after: NAVAL University OF ENGINEERING Country or region after: China Address before: 430033 Hubei province in Qiaokou District of Wuhan City Jiefang Road No. 717 Patentee before: NAVAL University OF ENGINEERING Country or region before: China Patentee before: NANTONG HAIDA NEW MATERIAL TECHNOLOGY CO.,LTD. |