CN103697284B - A kind of pipe pressure test device - Google Patents
A kind of pipe pressure test device Download PDFInfo
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- CN103697284B CN103697284B CN201310731752.0A CN201310731752A CN103697284B CN 103697284 B CN103697284 B CN 103697284B CN 201310731752 A CN201310731752 A CN 201310731752A CN 103697284 B CN103697284 B CN 103697284B
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- pressure testing
- land
- pipe
- seal ring
- testing cylinder
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2884—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for welds
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of pipe pressure test device, the block head comprising pressure testing cylinder and coordinate with pressure testing cylinder; Described pressure testing cylinder is both ends open or one end open, and pressure testing cylinder inwall is provided with intake pipe and the spill pipe of both sides inside and outside conducting pressure testing cylinder; Described block head comprises the sealing configuration and land that are provided with seal ring; Described sealing configuration is placed on outside pressure testing cylinder, and described pressure testing drum outer wall is provided with the screens projection or screens step that coordinate with sealing configuration; Described land is connected with pressure testing cylinder by locking mechanism, and land is connected with sealing configuration.Pipe pressure test device of the present invention save material, pressure testing efficiency high, do not need, at pipe fitting two ends welding plug, to connect two seal plugs by intermediate connection tube, make delicate structure, simple, practical.
Description
Technical field
The present invention relates to a kind of pipe pressure test device.
Background technique
In the prior art, the pressure testing of the pipe fittings such as perforate, shutoff threeway, insulating short section, receiving ball tube is generally end socket of being burn-on at its two ends, wherein one end end socket is installed into water pipe and pressure gauge, is prescinded by the end socket burn-on in two ends after pressure testing terminates again.Also have a kind of Pressure test program for seal face (about 100mm) is reserved by machined in threeway two ends, require its circularity and degree of finish, need a pressure testing end face excision after pressure testing completes, and process end face on lathe, reach delivery requirements.
Existing technological scheme has following shortcoming: 1) need customize nonstandard end socket, waste of material is serious; 2) welding regenerates welding stress to heat treated elbow, affects pipe fitting quality; 3) welding job amount is large, and efficiency is low; 4) manufacturing procedure is many, and difficulty is large.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide and a kind ofly save the pipe pressure test device that material, pressure testing efficiency are high, do not need welding plug and pipeline tapping.
Technological scheme of the present invention is achieved in that
A kind of pipe pressure test device, the block head comprising pressure testing cylinder and coordinate with pressure testing cylinder; Described pressure testing cylinder is both ends open or one end open, and pressure testing cylinder inwall is provided with intake pipe and the spill pipe of both sides inside and outside conducting pressure testing cylinder; Described block head comprises the sealing configuration and land that are provided with seal ring; Described sealing configuration is placed on outside pressure testing cylinder, and described pressure testing drum outer wall is provided with the screens projection or screens step that coordinate with sealing configuration; Described land is connected with pressure testing cylinder by locking mechanism, and land is connected with sealing configuration.
Above-mentioned pipe pressure test device, the seal ring that described sealing configuration comprises two-layer flange platen and is arranged between two-layer flange platen; Described flange platen and seal ring are placed on outside pressure testing cylinder; Wherein one deck flange platen is blocked by screens projection or screens step, and another layer of flange platen contacts with land; Can axial relative motion between two-layer flange platen, the inner side of described seal ring radial direction contacts with described pressure testing drum outer wall.
Above-mentioned pipe pressure test device, on described seal ring, the equal and seal ring interior thickness of each several part outer diameter is less than the two-end thickness of seal ring axis.Described thickness is want the outer radius of calculating section present position to deduct inside radius.
Above-mentioned pipe pressure test device, one end that described flange platen contacts with seal ring is provided with annular table terrace, and seal ring coordinates with the annular table terrace of flange platen; One end that described land contacts with flange platen is also provided with annular table terrace, coordinates with the annular table terrace of land with land engagement flange platen.
Above-mentioned pipe pressure test device, described locking mechanism comprises the inner bolt hole be arranged on pressure testing cylinder, be positioned on land with the through hole of described inner bolt hole corresponding position and the bolt that coordinates with described inner bolt hole.
Above-mentioned pipe pressure test device, also comprises pre-tightening apparatus, and described pre-tightening apparatus comprises hydraulic station and the oil hydraulic cylinder be communicated with described hydraulic station by hydraulic tube, and the piston rod end of described oil hydraulic cylinder is connected with land.
Pressure device of the present invention is used for the harmless pressure testing of the pipe fittings such as threeway, insulating short section and receiving ball tube; Tool has the following advantages: 1, without the need to welding end socket, do not damage pipe fitting; 2, cost-saving, raise the efficiency; 3, compact, easy to operate, the safety of complete machine.
Accompanying drawing explanation
Fig. 1 is the structural representation of pipe pressure test device of the present invention for threeway pressure testing.
Fig. 2 is the structural representation of pipe pressure test device of the present invention for the pressure testing of pipe-line wrapping pipe nipple.
Fig. 3 is the structural representation of pipe pressure test device of the present invention for receiving ball tube.
Fig. 4 is the round inner structure enlarged view in Fig. 2.
In above-mentioned accompanying drawing, 1, pressure testing cylinder; 2, block head; 3, threeway; 4, insulating short section; 5, receiving ball tube; 11, intake pipe; 12, spill pipe; 21, seal ring; 22, land; 23, flange platen; 24, bolt.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, the invention discloses a kind of pipe pressure test device, the block head comprising pressure testing cylinder 1 and coordinate with pressure testing cylinder 1; Pressure testing cylinder 1 is both ends open or one end open, and the opening end of pressure testing cylinder 1 by block head shutoff, thus ensures to form airtight cavity between pressure testing drum outer wall and the pipe fitting treating pressure testing.Pressure testing cylinder 1 inwall is provided with intake pipe 11 and the spill pipe 12 of both sides inside and outside conducting pressure testing cylinder 1.Intake pipe 11 and spill pipe 12 Bonding pressure testing apparatus (being the pressure test equipment used in prior art) respectively; The water injecting pipe of intake pipe 11 Bonding pressure testing apparatus, pressure gauge and the bleed valve of spill pipe 12 and pressure test equipment are connected.Block head comprises the sealing configuration and land 22 that are provided with seal ring 21; Sealing configuration is placed on outside pressure testing cylinder 1, and pressure testing cylinder 1 outer wall is provided with the screens projection or screens step that coordinate with sealing configuration; Sealing configuration blocks by position projection or screens step, is conducive to realizing the deformation of seal ring 21 thus fills up pressure testing pipe 1 outer wall and treat the gap between pressure testing pipe inwall, ensures seal.Land 22 is connected with pressure testing cylinder 1 by locking mechanism, and land 22 is connected with sealing configuration; Under the effect of compression device, the screens projection of land 22 and pressure testing cylinder 1 or screens step are formed sealing configuration oppresses, thus makes seal ring 21 deformation, fills up pressure testing pipe 1 outer wall and treats the gap between pressure testing pipe inwall, ensures seal.
In Fig. 1, Fig. 2 and Fig. 3, the seal ring 21 that sealing configuration comprises two-layer flange platen 23 and is arranged between two-layer flange platen; Described flange platen 23 is placed on outside pressure testing cylinder 1 with seal ring 21; Wherein one deck flange platen 23 is blocked by screens projection or screens step, and another layer of flange platen 23 contacts with land 22; Can axial relative motion between two-layer flange platen 23, the inner side of described seal ring 21 radial direction and described pressure testing cylinder 1 wall contacts.Seal ring 21 is made up of elastic caoutchouc.Under the effect of compression device, the screens projection of land 22 and pressure testing cylinder 1 or screens step are formed two-layer flange platen 23 respectively oppresses, two-layer flange platen 23 is drawn close to direction close to each other, seal ring 21 is forced to produce deformation, fill up pressure testing pipe 1 outer wall and treat the gap between pressure testing pipe inwall, ensure the seal forming airtight chamber.
On seal ring 21 outer wall, equal and seal ring 21 interior thickness of each several part outer diameter is less than the two-end thickness of seal ring 21 axis.Design like this, when seal ring 21 be subject to two flange platens 23 extrude time, according to mechanics principle, easier in the Direction distortion (namely the inwall of pressure testing pipe is treated in extruding) away from seal ring 21 axis in the middle part of seal ring 21, seal ring 21 two ends (part namely contacted with flange platen 23) is easier in the Direction distortion near seal ring 21 axis; So, then ensure that seal ring 21 can better realize airtight effect.
In Fig. 1, Fig. 2 and Fig. 3, one end that flange platen 23 contacts with seal ring 21 is provided with annular table terrace, and seal ring 21 coordinates with the annular table terrace of flange platen 23; One end that described land 22 contacts with flange platen 23 is also provided with annular table terrace, and the flange platen 23 contacted with land 22 coordinates with the annular table terrace of land 22.Seal ring 21 coordinates with the annular table terrace of flange platen 23, makes seal ring 21 increase with the area of contact of flange platen 23 first, increases the leakproofness that seal ring 21 contacts with flange platen 23, improve sealing effect; On the other hand, the annular table terrace of two-layer flange platen 23, limits the position of seal ring 21, make to install convenient, fast improve working efficiency.And flange platen 23 coordinates with the annular table terrace of land 22, then define the link position of land 22 and flange platen 23, when ensureing to install, uniform force on flange platen 23, and then ensure that the deformation of seal ring 21 uniform stressed, the consequences such as the gas leakage avoiding the deformation inequality produced due to seal ring 21 discontinuity to cause.
Locking mechanism is also show, the bolt 24 that described locking mechanism comprises the inner bolt hole be arranged on pressure testing cylinder 1, is positioned at through hole corresponding with described inner bolt hole position on land 22 and coordinates with described inner bolt hole in Fig. 1, Fig. 2 and Fig. 3.During use, bolt 24 is through being threaded with the inner bolt hole on pressure testing cylinder 1 by rear, and the head of bolt 24 is stuck in the side away from pressure testing cylinder 1 on land 22.Swivel bolt 24 makes land 22 compress/loosen pressure testing cylinder 1, thus realizes the process of attaching/detaching pressure testing device.
Above-mentioned locking mechanism also comprises pre-tightening apparatus (be in figure and illustrate), and pre-tightening apparatus comprises hydraulic station and the oil hydraulic cylinder be communicated with described hydraulic station by hydraulic tube, and the piston rod end of described oil hydraulic cylinder is connected with land 22.By the control of hydraulic station, oil hydraulic cylinder shrinks, and drive land 22 pretension flange platen 23, flange platen 23 compresses seal 21, makes seal ring radial deformation, and treats that pressure testing pipe inwall is adjacent to.
Hereafter for pipe pressure test device of the present invention applies to the pressure-measuring method of different pipe fitting:
Embodiment 1 pipe pressure test device is used for threeway pressure testing
Pressure testing step is as follows:
The pressure testing pipe 1 of a, employing both ends open is installed in the straight tube of threeway 3, also needs the perforate of not installing block head to block if this threeway 3 is perforate threeway; Then flange platen 23, seal ring 21, land 22 are enclosed within the outer wall at pressure testing pipe 1 two ends according to the mode preset, construction bolt 24, swivel bolt 24 makes flange platen 23 compresses seal 21, seal ring 21 radial deformation, thus tightly fit with threeway 3 inwall, such pressure testing pipe 1 outer wall and threeway 3 inwall form an airtight cavity.(as shown in Figure 1) if desired pretension, also to need to use pre-tightening apparatus to carry out pretension setting before swivel bolt 24;
B, the note hose coupling that pressure instrumentataion is drawn and intake pipe 11 conducting, the pressure gauge of spill pipe 12 and pressure instrumentataion and outlet valve, open outlet valve, by intake pipe 11 to pressure testing cylinder 1 inwall with treat water filling in the closed cavity that pressure testing pipe inwall is formed, after filling, water intake 11 is switched to and is connected with the hydraulic test pump of pressure instrumentataion;
Whether c, inspection pressure testing device leak, and need continue if any leaking the bolt screwing two ends, and observe land 22 and treat the gap between pressure testing pipe inwall, adjustment is consistent;
D, the pressure testing of startup hydraulic test pump, as in process, block head has leakage, then continue screwing bolts 24 and make seal ring 21 continue distortion, or check adjustment land 22 and treat the gap between pressure testing pipe inwall after needing pressure release;
E, continuing to boost to test pressure voltage stabilizing, whether have seepage or leakage, and do respective record if observing the weld seam treated on pressure testing pipe, sealing position and other outer surface portions;
After f, observation, test ending, close pressure instrumentataion, open outlet valve pressure release draining, after treating pressure release draining, counterrotating bolt 24, namely completes the work pressure test that all reduces pressure after being removed by pipe pressure test device.
Embodiment 2 pipe pressure test device is used for insulating short section pressure testing
Pressure testing step is as follows:
The pressure testing pipe 1 of a, employing both ends open is installed in insulating short section 4; Then flange platen 23, seal ring 21, land 22 are enclosed within the outer wall at pressure testing pipe 1 two ends according to the mode preset, construction bolt 24, swivel bolt 24 makes flange platen 23 compresses seal 21, seal ring 21 radial deformation, thus tightly fit with insulating short section 4 inwall, such pressure testing pipe 1 outer wall and insulating short section 4 inwall form an airtight cavity.(as shown in Figure 2 and Figure 4) if desired pretension, also to need to use pre-tightening apparatus to carry out pretension setting before swivel bolt 24;
B, the note hose coupling that pressure instrumentataion is drawn and intake pipe 11 conducting, the pressure gauge of spill pipe 12 and pressure instrumentataion and outlet valve, open outlet valve, by intake pipe 11 to pressure testing cylinder 1 inwall with treat water filling in the closed cavity that pressure testing pipe inwall is formed, after filling, water intake 11 is switched to and is connected with the hydraulic test pump of pressure instrumentataion;
Whether c, inspection pressure testing device leak, and need continue if any leaking the bolt screwing two ends, and observe land 22 and treat the gap between pressure testing pipe inwall, adjustment is consistent;
D, the pressure testing of startup hydraulic test pump, as in process, block head has leakage, then continue screwing bolts 24 and make seal ring 21 continue distortion, or check adjustment land 22 and treat the gap between pressure testing pipe inwall after needing pressure release;
E, continuing to boost to test pressure voltage stabilizing, whether have seepage or leakage, and do respective record if observing the weld seam treated on pressure testing pipe, sealing position and other outer surface portions;
After f, observation, test ending, close pressure instrumentataion, open outlet valve pressure release draining, after treating pressure release draining, counterrotating bolt 24, namely completes the work pressure test that all reduces pressure after being removed by pipe pressure test device.
Embodiment 3 pipe pressure test device is used for receiving ball tube pressure testing
Pressure testing step is as follows:
The pressure testing pipe 1 of a, employing one end open is installed in receiving ball tube 5, and opening end is near the opening of receiving ball tube 5; The not opening end of pressure testing pipe 1 coordinates with receiving ball tube 5 Inner Dimension, prevents pressure testing pipe 1 from going out the outlet of receiving ball tube 5; Then flange platen 23, seal ring 21, land 22 are enclosed within the outer wall at pressure testing pipe 1 two ends according to the mode preset, construction bolt 24, swivel bolt 24 makes flange platen 23 compresses seal 21, seal ring 21 radial deformation, thus tightly fit with receiving ball tube 5 inwall, such pressure testing pipe 1 outer wall and receiving ball tube 5 inwall form an airtight cavity.(as shown in Figure 3) if desired pretension, also to need to use pre-tightening apparatus to carry out pretension setting before swivel bolt 24;
B, the note hose coupling that pressure instrumentataion is drawn and intake pipe 11 conducting, the pressure gauge of spill pipe 12 and pressure instrumentataion and outlet valve, open outlet valve, by intake pipe 11 to pressure testing cylinder 1 inwall with treat water filling in the closed cavity that pressure testing pipe inwall is formed, after filling, water intake 11 is switched to and is connected with the hydraulic test pump of pressure instrumentataion;
Whether c, inspection pressure testing device leak, and need continue if any leaking the bolt screwing two ends, and observe land 22 and treat the gap between pressure testing pipe inwall, adjustment is consistent;
D, the pressure testing of startup hydraulic test pump, as in process, block head has leakage, then continue screwing bolts 24 and make seal ring 21 continue distortion, or check adjustment land 22 and treat the gap between pressure testing pipe inwall after needing pressure release;
E, continuing to boost to test pressure voltage stabilizing, whether have seepage or leakage, and do respective record if observing the weld seam treated on pressure testing pipe, sealing position and other outer surface portions;
After f, observation, test ending, close pressure instrumentataion, open outlet valve pressure release draining, after treating pressure release draining, counterrotating bolt 24, namely completes the work pressure test that all reduces pressure after being removed by pipe pressure test device.
Above-described embodiment is only for the invention example is clearly described, and the restriction not to the invention embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description, exhaustive without the need to also giving all mode of executions here.And thus the apparent change of amplifying out or variation be still among the protection domain of the invention claim.
Claims (5)
1. a pipe pressure test device, is characterized in that, the block head (2) comprising pressure testing cylinder (1) and coordinate with pressure testing cylinder (1); Described pressure testing cylinder (1) is both ends open or one end open, and pressure testing cylinder (1) inwall is provided with intake pipe (11) and the spill pipe (12) of the inside and outside both sides of conducting pressure testing cylinder (1); Described block head (2) comprises the sealing configuration and land (22) that are provided with seal ring (21); Described sealing configuration is placed on pressure testing cylinder (1) outside, and described pressure testing cylinder (1) outer wall is provided with the screens projection or screens step that coordinate with sealing configuration; Described land (22) is connected with pressure testing cylinder (1) by locking mechanism, and land (22) is connected with sealing configuration; The seal ring (21) that described sealing configuration comprises two-layer flange platen (23) and is arranged between two-layer flange platen; Described flange platen (23) and seal ring (21) are placed on pressure testing cylinder (1) outside; Wherein one deck flange platen (23) is blocked by screens projection or screens step, and another layer of flange platen (23) contacts with land (22); Can axial relative motion, the inner side that described seal ring (21) is radial and described pressure testing cylinder (1) wall contacts between two-layer flange platen (23).
2. pipe pressure test device according to claim 1, is characterized in that, on described seal ring (21) outer wall, equal and seal ring (21) interior thickness of each several part outer diameter is less than the axial two-end thickness of seal ring (21).
3. pipe pressure test device according to claim 1, is characterized in that, one end that described flange platen (23) contacts with seal ring (21) is provided with annular table terrace, and seal ring (21) coordinates with the annular table terrace of flange platen (23); One end that described land (22) contacts with flange platen (23) is also provided with annular table terrace, and the flange platen (23) contacted with land (22) coordinates with the annular table terrace of land (22).
4. pipe pressure test device according to claim 2, it is characterized in that, the bolt (24) that described locking mechanism comprises the inner bolt hole be arranged on pressure testing cylinder (1), is positioned at the upper through hole corresponding with described inner bolt hole position of land (22) and coordinates with described inner bolt hole.
5. according to the arbitrary described pipe pressure test device of claim 1-4, it is characterized in that, also comprise pre-tightening apparatus, described pre-tightening apparatus comprises hydraulic station and the oil hydraulic cylinder be communicated with described hydraulic station by hydraulic tube, and the piston rod end of described oil hydraulic cylinder is connected with land (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310731752.0A CN103697284B (en) | 2013-12-18 | 2013-12-18 | A kind of pipe pressure test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310731752.0A CN103697284B (en) | 2013-12-18 | 2013-12-18 | A kind of pipe pressure test device |
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| CN103697284A CN103697284A (en) | 2014-04-02 |
| CN103697284B true CN103697284B (en) | 2015-07-29 |
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| CN201310731752.0A Active CN103697284B (en) | 2013-12-18 | 2013-12-18 | A kind of pipe pressure test device |
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| CN104833460B (en) * | 2015-05-04 | 2017-03-01 | 天津博益气动股份有限公司 | Cylindrical chamber door portion air-tightness detection tool |
| CN105334038B (en) * | 2015-11-26 | 2018-07-27 | 荆门市双创专利技术服务有限公司 | Valve water pressure test system |
| CN105300805B (en) * | 2015-11-26 | 2018-05-18 | 斯耐特(湖北)工业制造有限公司 | A kind of Super high pressure valve water pressure testing board |
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| CN107271262A (en) * | 2017-07-18 | 2017-10-20 | 中国海洋石油总公司 | Single weld seam pressure testing device in one kind pipe |
| CN108224093B (en) * | 2017-12-06 | 2024-01-30 | 周庆兵 | Quick-connection receiving and transmitting ball cylinder device and application method thereof |
| CN109443634B (en) * | 2018-12-25 | 2024-06-04 | 四川优机实业股份有限公司 | Sealing pressure measuring structure |
| CN110595700B (en) * | 2019-08-27 | 2021-03-23 | 浙江大学 | Static pressure bearing leakage test experiment table |
| CN112179569B (en) * | 2020-09-18 | 2021-06-15 | 中国水利水电第五工程局有限公司 | Water supply steel pipe hydrostatic test inner plugging head and plugging method thereof |
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| CA2312577C (en) * | 2000-06-27 | 2005-02-08 | Horst Gotowik | Apparatus for testing or isolating a segment of pipe |
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| GB2242530A (en) * | 1990-03-27 | 1991-10-02 | Int Pipeline Products Ltd | Pressure testing of pipeline welds |
| CN101915647A (en) * | 2010-08-25 | 2010-12-15 | 天津双街钢管有限公司 | End face seal pressure test head device of hydraulic pressure testing machine |
| CN202066751U (en) * | 2011-01-25 | 2011-12-07 | 中国石油大学(北京) | Pressure testing device for flange weld joints |
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| CN203628136U (en) * | 2013-12-18 | 2014-06-04 | 天津绿清管道科技股份有限公司 | Pipe fitting pressure testing device |
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| CN103697284A (en) | 2014-04-02 |
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