Hydraulic pressure test method for PCCP pipeline

A hydraulic test and pressure test technology, which is applied in the direction of applying stable tension/pressure to test material strength, fluid tightness test, machine/structural component test, etc. It can solve the problems of troublesome test and inaccurate test. Achieve maximum economic benefits, shorten the test cycle, reduce temporary facilities and the effects of water abandonment

Inactive Publication Date: 2017-12-05
SINOHYDRO BUREAU 11 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned utility model uses a simple device to realize the pressure test inside the pipeline, which is easy to operate and low in cost. However, the above-mentioned equipment is suitable for small pipelines. When testing large pipelines, it must be divided into countless sections, which brings trouble to the test. not accurate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Said method comprises:

[0057] (1) All the pipe joints have completed three joint pressure tests, and the joint pressure test steps are as follows:

[0058] (1.1) The first joint pressure inspection,

[0059] (1.1.1) Use the booster pump to press water from the water inlet hole at the lower part of the joint, and the upper exhaust hole to exhaust;

[0060] (1.1.2) After exhausting, tighten the bolts, pressurize to 0.6MPa, and keep the pressure for 5 minutes without dropping, it is qualified;

[0061] Air pressure inspection can also be used after the approval of the project supervisor. The pressure and stabilization time of air pressure inspection are the same as water pressure inspection.

[0062] (1.2) The second joint pressure inspection,

[0063] After installing 3 sections of PCCP pipeline 6, the first joint of the 3 sections of PCCP pipeline 6 should be subjected to a second joint pressure inspection, the method is the same as (1.1);

[0064] (1.3) The third ...

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PUM

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Abstract

The invention belongs to the technical field of PCCP pipelines, and relates to a hydraulic pressure test method for a PCCP pipeline. The method includes the following steps: three-time joint bulge test; automatic exhausting of a high-point exhaust valve and manual exhaust of a valve welded in the three-way valve of a steel converter in the hydrostatic stage; hydrostatic test and recording of a test pipeline through a water injection technology. The novel hydraulic pressure test method for the PCCP pipeline shortens the test period, reduces temporary facilities and abandoned water and obtains great economic benefits in the application process.

Description

technical field [0001] The invention belongs to the technical field of PCCP pipelines, and relates to a hydraulic test method for PCCP pipelines. Background technique [0002] At present, domestic and foreign PCCP pipelines are usually subjected to hydrostatic tests in sections, the length of which does not exceed 1.0 km, and is carried out several times. Temporary concrete or masonry back walls need to be removed many times. The continuity of installation and construction has a greater impact, and the required construction period is longer. [0003] For example, the utility model patent whose application number is CN201220174708 discloses a pressure pipeline hydraulic test device, including: [0004] Electric pressure pump, water suction pipe, water outlet pipe, water tank, water meter, pressure gauge, pressure sensor and control device; [0005] The electric pressure pump is provided with a water suction pipe and a water outlet pipe, the water suction pipe is arranged in...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01M3/28
CPCG01N3/12G01M3/2815G01N2203/0003G01N2203/0019G01N2203/0048G01N2203/0274G01N2203/0611
Inventor 齐敬雅孙东阳杨东东崔仕晓
Owner SINOHYDRO BUREAU 11 CO LTD
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