Construction method of non-stop contact opening for pressurized pipeline

A pipeline and construction method technology, which is applied in the field of pipeline butt joint construction, can solve the problems of inconvenient replacement of the hole opener and inconvenient repositioning of the hole opener, and achieve the effects of reducing the risk of repeated construction, improving the service life, and ensuring the effect of sealing

Active Publication Date: 2018-10-26
THE 14TH METALLURGICAL CONSTR GRP YUNNAN INSTALLATION ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2. When the aperture of the hole is large, due to the serious wear on the hole saw, once the hole is not opened, it is extremely inconvenient to replace the hole saw, especially when a certain gap is drilled and the pressure in the pipeline is high. , it is inconvenient to reposition the hole saw

Method used

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  • Construction method of non-stop contact opening for pressurized pipeline
  • Construction method of non-stop contact opening for pressurized pipeline
  • Construction method of non-stop contact opening for pressurized pipeline

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Experimental program
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Embodiment Construction

[0041] combine Figure 1-7 The construction method shown in the construction method of non-stop bump opening of pressurized pipelines includes the following steps: during preparation, since the bumped pipelines are all under pressure and in working condition, adequate safety precautions should be taken depending on the location of the bump. Potholes and subsidence should be prevented at locations below the ground, and fall protection should be done for aerial operations. It is best to build a solid operating platform.

[0042] A. Welding of short pipe with flange 1:

[0043] Select the joint position on the main pipe 4 according to the design requirements, and weld the short pipe 1 at the joint position. One end of the short pipe 1 is provided with the first flange 3 for connecting with the gate valve 2, and the other end of the short pipe 1 is welded on the main pipe. 4 above; the inner diameter of the short pipe 1 usually needs to be 25 mm or more larger than the designed r...

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Abstract

The invention relates to the technical field of pipeline docking construction and aims to provide efficient and stable construction method of non-stop contact opening for pressurized pipeline. The technical scheme relates to a construction method of non-stop contact opening for pressurized pipeline, including the following steps: A, welding a flanged short pipe; B, installing a gate valve; C, checking tightness; D, installing a reaming device; E, reaming; F, removing the reaming device; G, connecting a pipe. The method can stably and effectively detect the sealing property between the main tube and the short tube during welding and the sealing property of the connection between the gate valve and the short pipe, so as to quickly and conveniently realize the non-stop contact opening construction of the main tube and the branch pipe, reduce the risk of duplicate construction, and improve the efficiency of the construction as a whole and speed up the construction schedule.

Description

technical field [0001] The invention relates to the technical field of pipeline butt joint construction, and in particular to a construction method for non-stop butt joint opening of pressurized pipelines. Background technique [0002] In industrial production and civil life, because the medium in many pipelines is related to the production of countless production departments and people's lives, especially the medium supervisor, the collision of other branch pipes is not allowed to stop production, and the shutdown will bring about comprehensive damage to relevant departments. Stopping production and living is inconvenient, so a convenient, safe and fast opening method is the key to solving this kind of collision problem. [0003] At present, the main method used in the construction of the joint between the main pipe and the branch pipe is to weld a short pipe with a flange at the joint position of the main pipe and the branch pipe, and then install a gate valve on the short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B7/00
CPCE03B7/00
Inventor 吴江锐蒋黎刚魏东龙者邹大祥
Owner THE 14TH METALLURGICAL CONSTR GRP YUNNAN INSTALLATION ENG CO LTD
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