CN105855320A - Preparation method of anticorrosion coiled steel pipe for marine environment - Google Patents
Preparation method of anticorrosion coiled steel pipe for marine environment Download PDFInfo
- Publication number
- CN105855320A CN105855320A CN201610410788.2A CN201610410788A CN105855320A CN 105855320 A CN105855320 A CN 105855320A CN 201610410788 A CN201610410788 A CN 201610410788A CN 105855320 A CN105855320 A CN 105855320A
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- China
- Prior art keywords
- welding
- seam
- steel pipe
- marine environment
- conducting
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/30—Finishing tubes, e.g. sizing, burnishing
Abstract
The invention discloses a preparation method of an anticorrosion coiled steel pipe for the marine environment. The method includes the steps of firstly, detecting a plate; secondly, cutting the plate through flames and blanking, and forming grooves; thirdly, conducting coiling, wherein a polished steel plate is coiled into an O shape through a supporting type coiling technology; fourthly, conducting pairing, roundness correcting and longitudinal seam UT flaw detecting; fifthly, conducting longitudinal seam internal and external welding, wherein in the internal welding process and the external welding process, an anticorrosion welding agent are adopted, and a laser welding seam automatic tracking device with tracking precision of 0.25 mm is adopted; sixthly, conducting annular seam welding; seventhly, conducting welding seam residual height grinding, wherein seam surplus height is ground flat through a seam surplus height grinding machine; eighthly, conducting annular seam UT flaw detecting and X-ray flaw detecting; ninthly, marking the product for leaving a factory. The method is simple and solves the problems that an existing steel pipe for the marine environment is short in validity period, prone to ageing, poor in weather resistance, poor in corrosion resistance, low in size precision and the like.
Description
Technical field
The present invention relates to a kind of marine environment and roll steel pipe preparation method with anticorrosive, belong to steel pipe manufacture processing skill
Art field.
Background technology
Oil, natural gas are the important energy source of the national economic development, and the proportion in energy-consuming increases day by day,
And steel pipe market becomes a kind of most economical, the long distance delivery instrument safely, uninterruptedly of oil, natural gas.
Marine oil and gas rich reserves, development of resources marches to ocean becomes inexorable trend.Marine environment is sufficiently complex,
Tube material is required the highest by submarine pipeline.Current marine environment steel pipe exist effect duration short, the most aging,
The shortcomings such as weatherability is poor, corrosion-resistant, dimensional accuracy are low.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of marine environment rolls steel pipe with anticorrosive
Preparation method, solves existing marine environment steel pipe and has that effect duration is short, the most aging, weatherability is poor, corrosion resistant
The problems such as erosion property is poor, dimensional accuracy is low.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of marine environment rolls steel pipe preparation method with anticorrosive, comprises the following steps:
(1) sheet material detection: by ultrasonic flaw detection steel plate；
(2) flame cutting blanking, groove is beaten；
(3) roll: use brace type to roll technology and the roll of steel plate after polishing is made " O " type；
(4) group is to, school circle, longitudinal joint UT flaw detection；
(5) external welding in longitudinal joint: interior weldering uses mariages tandem Lincoln weld, and first is direct current, electric current
For 825-955A, voltage is 31-33V；Second is exchange, and electric current is 400-450A, and voltage is 34-36V；
Distance between weldingwires is 10-13mm, and speed of welding is 1.9-2.2m/min；
Outside weld uses mariages tandem Lincoln weld, and first is direct current, and electric current is 925-1055A, and voltage is
31-33V；Second is exchange, and electric current is 380-420A, and voltage is 34-36V；Distance between weldingwires is 13-16mm,
Speed of welding is 1.9-2.2m/min；
Described interior weldering, outer Welding all use anti-corrosion solder flux, and use tracking accuracy to reach the laser of 0.25mm
Automatic following device of welding seam；
(6) girth welding；
(7) weld reinforcement grinding: use weld reinforcement milling drum butt welded seam reinforcement to carry out grinding leveling.
(8) circumferential weld UT flaw detection, x-ray inspection；
(9) labelling dispatches from the factory.
Brace type described in step (3) rolls technology, is by three rolls plate bending machine, increases design one
Planting the cantilever of liftable band bearing, in coiling process, cantilever is rotated at random at pile pipe inwall, has reached top and has propped up
Support effect, it is ensured that the requirement of the ovality of steel pipe.
The chemical composition of the anti-corrosion solder flux described in step (5) is by weight percentage: CaF214-18%,
CaO+MgO 26-30%, Al2O3+ MnO≤25%, SiO2≤ 20%, S≤0.006%, P≤0.012%.
Compared with the prior art, beneficial effects of the present invention is as follows:
The marine environment of the present invention rolls steel pipe preparation method with anticorrosive, and method is simple, solves existing ocean
There is the problems such as effect duration is short, the most aging, weatherability is poor, corrosion-resistant, dimensional accuracy are low in environment steel pipe.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but the present invention is not limited only to these embodiments,
On the premise of without departing from present inventive concept, within any improvement made all falls within protection scope of the present invention.
Embodiment 1:
A kind of marine environment rolls steel pipe preparation method with anticorrosive, comprises the following steps:
(1) sheet material detection: by ultrasonic flaw detection steel plate；
(2) flame cutting blanking, groove is beaten；
(3) roll: use brace type to roll technology and the roll of steel plate after polishing is made " O " type；Described props up
Support formula rolls technology, is by three rolls plate bending machine, increases the cantilever designing a kind of liftable band bearing,
In coiling process, cantilever is rotated at random at pile pipe inwall, has reached top braces effect, it is ensured that the ovality of steel pipe
Requirement.
(4) group is to, school circle, longitudinal joint UT flaw detection；
(5) external welding in longitudinal joint: interior weldering uses mariages tandem Lincoln weld, and first is direct current, electric current
For 825A, voltage is 31V；Second is exchange, and electric current is 400A, and voltage is 34V；Distance between weldingwires is
10mm, speed of welding is 1.9m/min；Outside weld uses mariages tandem Lincoln weld, and first is direct current,
Electric current is 925A, and voltage is 31V；Second is exchange, and electric current is 380A, and voltage is 34V；Distance between weldingwires
For 13mm, speed of welding is 1.9m/min；Described interior weldering, outer Welding all use anti-corrosion solder flux, and use
Tracking accuracy reaches the laser welded seam autotracker of 0.25mm；The chemical composition of described anti-corrosion solder flux is pressed
Percentage by weight is: CaF214%, CaO+MgO 26%, Al2O3+ MnO≤25%, SiO2≤ 20%, S≤0.006%,
P≤0.012%.
(6) girth welding；
(7) weld reinforcement grinding: use weld reinforcement milling drum butt welded seam reinforcement to carry out grinding leveling.
(8) circumferential weld UT flaw detection, x-ray inspection；
(9) labelling dispatches from the factory.
Steel pipe decay resistance prepared by the inventive method is as follows:
Claims (3)
1. a marine environment rolls steel pipe preparation method with anticorrosive, it is characterised in that: comprise the following steps:
(1) sheet material detection: by ultrasonic flaw detection steel plate；
(2) flame cutting blanking, groove is beaten；
(3) roll: use brace type to roll technology and the roll of steel plate after polishing is made " O " type；
(4) group is to, school circle, longitudinal joint UT flaw detection；
(5) external welding in longitudinal joint: interior weldering uses mariages tandem Lincoln weld, and first is direct current, electric current
For 825-955A, voltage is 31-33V；Second is exchange, and electric current is 400-450A, and voltage is 34-36V；
Distance between weldingwires is 10-13mm, and speed of welding is 1.9-2.2m/min；
Outside weld uses mariages tandem Lincoln weld, and first is direct current, and electric current is 925-1055A, and voltage is
31-33V；Second is exchange, and electric current is 380-420A, and voltage is 34-36V；Distance between weldingwires is 13-16mm,
Speed of welding is 1.9-2.2m/min；
Described interior weldering, outer Welding all use anti-corrosion solder flux, and use tracking accuracy to reach the laser of 0.25mm
Automatic following device of welding seam；
(6) girth welding；
(7) weld reinforcement grinding: use weld reinforcement milling drum butt welded seam reinforcement to carry out grinding leveling.
(8) circumferential weld UT flaw detection, x-ray inspection；
(9) labelling dispatches from the factory.
Marine environment the most according to claim 1 rolls steel pipe preparation method with anticorrosive, and its feature exists
In: the brace type described in step (3) rolls technology, is by three rolls plate bending machine, increases design one
Planting the cantilever of liftable band bearing, in coiling process, cantilever is rotated at random at pile pipe inwall, has reached top and has propped up
Support effect, it is ensured that the requirement of the ovality of steel pipe.
Marine environment the most according to claim 1 rolls steel pipe preparation method with anticorrosive, and its feature exists
In: the chemical composition of the anti-corrosion solder flux described in step (5) is by weight percentage: CaF214-18%, CaO+MgO
26-30%, Al2O3+ MnO≤25%, SiO2≤ 20%, S≤0.006%, P≤0.012%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410788.2A CN105855320A (en) | 2016-06-03 | 2016-06-03 | Preparation method of anticorrosion coiled steel pipe for marine environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410788.2A CN105855320A (en) | 2016-06-03 | 2016-06-03 | Preparation method of anticorrosion coiled steel pipe for marine environment |
Publications (1)
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| CN105855320A true CN105855320A (en) | 2016-08-17 |
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| CN201610410788.2A Pending CN105855320A (en) | 2016-06-03 | 2016-06-03 | Preparation method of anticorrosion coiled steel pipe for marine environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107363473A (en) * | 2017-06-27 | 2017-11-21 | 浙江莱德桑机械有限公司 | A kind of manufacturing process of ammonia tank |
| CN108637050A (en) * | 2018-05-03 | 2018-10-12 | 陈浩 | A method of it improving ship plate and rolls precision |
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2016
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| CN102233510A (en) * | 2011-05-23 | 2011-11-09 | 天津市裕兴钢管有限公司 | Production process of large-caliber straight-slit submerged-arc welding steel pipe |
| CN102433870A (en) * | 2011-09-14 | 2012-05-02 | 山东省呈祥电工电气有限公司 | Composite marine wind tower base pile pipe and processing technic thereof |
| CN102330034A (en) * | 2011-09-30 | 2012-01-25 | 中国石油集团渤海石油装备制造有限公司 | X65MS steel-grade spiral welded tube for acidic corrosion environment and manufacturing method thereof |
| CN102513787A (en) * | 2011-12-08 | 2012-06-27 | 中国海洋石油总公司 | Process for production line of an ocean engineering structural steel pipes |
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|---|---|---|---|---|
| CN107363473A (en) * | 2017-06-27 | 2017-11-21 | 浙江莱德桑机械有限公司 | A kind of manufacturing process of ammonia tank |
| CN107363473B (en) * | 2017-06-27 | 2019-05-24 | 浙江莱德桑机械有限公司 | A kind of manufacturing process of ammonia tank |
| CN108637050A (en) * | 2018-05-03 | 2018-10-12 | 陈浩 | A method of it improving ship plate and rolls precision |
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Application publication date: 20160817 |
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