Hydrostatic test compensator and method of carrying out pipe hydrostatic tests by using same

A hydrostatic test and compensator technology, applied in the direction of applying stable tension/pressure to test the strength of materials, using liquid/vacuum to measure liquid tightness, etc., can solve problems such as large water intake, low efficiency, and long time , to achieve the effect of improving efficiency, reducing overall time and high safety

Inactive Publication Date: 2013-12-04
BEIJING LONGSHINE OIL TUBULAR TECH
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Problems solved by technology

Existing hydrostatic testing technology for large-diameter pipes shows the problems of large water intake, long time, and low efficiency, which often become the control bottleneck in the production process of steel pipes

Method used

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  • Hydrostatic test compensator and method of carrying out pipe hydrostatic tests by using same
  • Hydrostatic test compensator and method of carrying out pipe hydrostatic tests by using same
  • Hydrostatic test compensator and method of carrying out pipe hydrostatic tests by using same

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Embodiment Construction

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] Such as Figure 1 to Figure 4 A hydraulic test compensator is shown, the hydraulic test compensator is a cylinder that can withstand an external pressure not lower than the pressure of the pipe hydraulic test without damage, and the cylinder is a solid cylinder , in other embodiments, it can also be a hollow shell structure with sealed heads at both ends; the envelope outer diameter of the hydrostatic test compensator is 96% of the inner diameter of the corresponding hydrostatic test pipe, and the outermost two ends The length of the flange is 50mm to 150mm short...

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Abstract

The invention discloses a hydrostatic test compensator. The hydrostatic test compensator is a cylinder which can bear the external pressure not less than the pressure size of the hydrostatic test for a pipe without damage; the cylinder is a solid cylinder or is in a hollow shell structure with the two ends sealed by adopting sealing heads. The invention also discloses a method of carrying out pipe hydrostatic tests, and the method comprises following steps: propelling the hydrostatic test compensator into a pipe to be tested, then fixing the pipe to be tested, which has been stuffed with the hydrostatic test compensator, and the hydrostatic test compensator to a hydrostatic test machine, and then carrying out hydrostatic tests according to normal methods. When the hydrostatic-test compensator is used for the hydrostatic test of the pipe, due to the capability of bearing the external pressure, the hydrostatic-test compensator is not deformed in the process of the hydrostatic test of the pipe, so that the water feeding time and the water discharging time in the hydrostatic test can be greatly reduced, and therefore the whole time for the hydrostatic test of the pipe is reduced and the efficiency of the hydrostatic test is increased.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to a hydrostatic test compensator and a method for performing a hydrostatic test of pipes. Background technique [0002] According to the requirements of pipe standards or pipe technical specifications (such as GB / T 9711, API SPEC 5L), pipes used for oil and gas transportation (or other pressure-bearing pipes) need to undergo hydrostatic tests (strength test and tightness test). And the hydrostatic test often becomes the control link of the production capacity of the pipe production line (the process takes a relatively long time). When the outer diameter of the steel pipe increases (such as 813mm and above), the hydrostatic test will have a more significant impact on the production capacity of the pipe production line. . Existing hydrostatic testing technology for large-diameter pipes shows the problems of large water intake, long time, and low efficiency, which of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01M3/02
Inventor 李记科李云龙杨红兵王长安吴金辉杨专钊王耀光
Owner BEIJING LONGSHINE OIL TUBULAR TECH
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