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Process for cleaning whole inner wall of long pipeline for high-purity gas

A high-purity gas, integrated process technology, applied in the direction of cleaning hollow objects, cleaning methods and utensils, drying solid materials, etc., can solve the problems of incomplete cleaning of impurities, discontinuous time schedule, and insufficient manual work, to avoid The effect of reverse running of the pig, improving construction quality and reducing labor costs

Active Publication Date: 2014-09-03
TIANJIN PIPELINE ENG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cleaning technology is a one-way cleaning pipeline, which mainly has the following defects: 1. There are many value-added links, such as manual work is not full, and the time arrangement is not continuous, resulting in relatively high costs
2. There may be residual impurities in the welding joints of the 90 bends of the pipeline, the upper return and the lower return, which cannot be completely cleaned
It takes a long time to clean the oxide scale, which wastes a lot of materials, labor and construction period

Method used

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  • Process for cleaning whole inner wall of long pipeline for high-purity gas
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  • Process for cleaning whole inner wall of long pipeline for high-purity gas

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Embodiment Construction

[0031] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be noted that the embodiments are illustrative, not restrictive, and cannot limit the protection scope of the present invention.

[0032] An integral process for cleaning the inner wall of a high-purity gas long pipeline, which includes the following steps:

[0033] ⑴. Pipeline status investigation and treatment.

[0034] The pipeline status investigation and treatment include the following items: understand the direction of the pipeline, the relationship between the position and other pipelines through the drawings; the pipelines that need to be cleaned must meet the following conditions: the inner diameter of the same pipeline should be the same or similar, and the difference between the inner diameters is ≤ 10mm ;Pipeline layout should be as straight as possible, and the general curvature radius of the elbow that must be used is R≥1.5D; ...

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Abstract

The invention relates to a process for cleaning the whole inner wall of a long pipeline for high-purity gas. The process includes the following steps that (1), present situation investigation and processing are carried out on the pipeline; (2), rust removal and dedusting cleaning processing is carried out on the inner wall of the pipeline, wherein a leather cup steel brush pipe cleaner and a foam pipe cleaner are pushed through oil-free compressed air to rapidly move in a laid long-distance pipeline in one direction so as to push quantities of residues and other impurities in the long-distance pipeline out of the pipeline; (3), drying processing is conducted on the inner wall of the pipeline, wherein a large-scale compressor and a gas storage tank accumulator are utilized to purge a pipeline system; (4) protection is conducted on a finished pipeline. The process for cleaning the whole inner wall of the long pipeline for high-purity gas is reasonable in design, easy and convenient to operate and especially applied to processing the inner wall of the pipeline for high-purity gas. By the adoption of the process, the construction progress can be quickened, construction quality can be improved, manual operation can be reduced, construction cost can be saved, and efficiency of construction operation is effectively improved.

Description

technical field [0001] The invention relates to the technical field of pipeline inner wall treatment, in particular to an integral process for cleaning the inner wall of a high-purity gas long pipeline. Background technique [0002] The application of high-purity industrial gases is becoming more and more extensive. It is called one of the blood of industry and has an important impact on the high-tech fields of various industries. During the construction process of carbon steel pipelines transporting high-purity oxygen, it is necessary to strictly carry out the inner wall cleaning, degreasing, drying and other processes to meet the "three degrees" requirements of gas purity, dryness, and cleanliness. The existing cleaning technology is a one-way cleaning pipeline, which mainly has the following defects: 1. There are many value-added links, such as manual work is not full, and the time arrangement is not continuous, resulting in relatively high costs. 2. There may be residua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/027B08B9/053F26B5/00
CPCB08B9/0328B08B9/0497F26B5/00
Inventor 孟繁强陈宝强张雪丽孙涛戴广峻潘中奇
Owner TIANJIN PIPELINE ENG GROUP
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