Method for fireproof isolation welding in oil and gas pipeline hot work

A technology for hot work and oil and gas pipelines, applied to pipeline systems, welding equipment, hollow objects, etc., can solve problems such as poor fire prevention effect of oil and gas leakage, unstable butter wall, etc., and achieve the effect of low use cost and low price

Inactive Publication Date: 2015-03-04
陕西延长石油(集团)有限责任公司管道运输公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for welding fireproof isolation in oil and gas pipeline hot work, which solves the technical problem in the prior art that when butter wall is used for fireproof isolation, the butter wall is unstable and the fire prevention effect of oil and gas leakage is not good.

Method used

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  • Method for fireproof isolation welding in oil and gas pipeline hot work
  • Method for fireproof isolation welding in oil and gas pipeline hot work
  • Method for fireproof isolation welding in oil and gas pipeline hot work

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Perform pressure relief and oil discharge on oil and gas pipelines. If the pipeline does not have the conditions for pressure relief and oil discharge, seal the pipeline under pressure to ensure that the pipeline that needs to be equipped with a fireproof wall is free of oil and pressure;

[0040] Step 2: Measure the industrial salt and butter, and weigh them according to the mass percentage, the industrial salt is 40%, the butter is 60%, mix and stir the two, so that the industrial salt and butter are evenly mixed;

[0041] Step 3:

[0042] Step 3.1: Add water to the obtained industrial salt and stir to make the industrial salt moist;

[0043] Step 3.2: Put the industrial salt prepared in step 3.1 into the heating tube, the inner diameter of the heating tube is equal to the inner diameter of the oil and gas pipeline;

[0044] Step 3.3: Turn on the heating tube in step 3.2 to heat until the industrial salt forms agglomerates;

[0045] Step 4: Take out the form...

Embodiment 2

[0050] Step 1: Perform pressure relief and oil discharge on oil and gas pipelines. If the pipeline does not have the conditions for pressure relief and oil discharge, seal the pipeline under pressure to ensure that the pipeline that needs to be equipped with a fireproof wall is free of oil and pressure;

[0051] Step 2: Measure the industrial salt and butter, and weigh them according to the mass percentage, the industrial salt is 50%, the butter is 50%, mix and stir the two, so that the industrial salt and butter are evenly mixed;

[0052] Step 3:

[0053] Step 3.1: Add water to the obtained industrial salt and stir to make the industrial salt moist;

[0054] Step 3.2: Put the industrial salt prepared in step 3.1 into the heating tube, the inner diameter of the heating tube is equal to the inner diameter of the oil and gas pipeline;

[0055] Step 3.3: Turn on the heating tube in step 3.2 to heat until the industrial salt forms agglomerates;

[0056] Step 4: Take out the form...

Embodiment 3

[0061] Step 1: Perform pressure relief and oil discharge on oil and gas pipelines. If the pipeline does not have the conditions for pressure relief and oil discharge, seal the pipeline under pressure to ensure that the pipeline that needs to be equipped with a fireproof wall is free of oil and pressure;

[0062] Step 2: Measure the industrial salt and butter, and weigh them according to the mass percentage, the industrial salt is 60%, the butter is 40%, mix and stir the two, so that the industrial salt and butter are evenly mixed;

[0063] Step 3:

[0064] Step 3.1: Add water to the obtained industrial salt and stir to make the industrial salt moist;

[0065] Step 3.2: Put the industrial salt prepared in step 3.1 into the heating tube, the inner diameter of the heating tube is equal to the inner diameter of the oil and gas pipeline;

[0066] Step 3.3: Turn on the heating tube in step 3.2 to heat until the industrial salt forms agglomerates;

[0067] Step 4: Take out the form...

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Abstract

The invention discloses a method for fireproof isolation welding in oil and gas pipeline hot work. The method comprises the steps that firstly, pressure relief oil draining is carried out on an oil conveying pipeline; industrial salt and butter are measured and are weighed according to the mass percent; the 40 percent to 60 percent of industrial salt and 40 percent to 60 percent of butter are mixed and stirred and are evenly mixed; the industrial salt is contained into a heating pipe to be heated and formed, and then is contained in the pipeline; a mixture of the industrial salt and the butter is contained in the pipeline; a pipeline welding device is used for carrying out welding; and finally, warm water is used for cleaning the pipeline. According to the method for fireproof isolation welding in oil and gas pipeline hot work, the industrial salt is adopted to carry out fireproof isolation; operation is convenient; the effect is obvious; and meanwhile the industrial salt is cheap and low in cost.

Description

technical field [0001] The invention belongs to the technical field of oil and gas pipelines, and relates to a method for welding and fireproof isolation in hot work of oil and gas pipelines. Background technique [0002] When steel pipelines are used for long-distance oil transportation, maintenance and hot-fire welding pipelines often occur. Even if the transportation is stopped, there will still be a certain amount of oil, oil and gas inside the oil and gas pipelines, and there will be a certain amount of pressure , For construction safety, oil and gas must be isolated from hot fire points to prevent explosion and fire hazards. In the current oil and gas pipeline hot construction and pipeline maintenance and repair process, the oil and gas isolation at the hot spot uses a butter wall, which is unstable and prone to collapse during long-term hot construction, leaking oil and gas, threatening hot construction It is safe, and at the same time, it is easy to flow and form ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
CPCB23K31/02B23K2101/10
Inventor 杨振华拓东刘占兵冯建平
Owner 陕西延长石油(集团)有限责任公司管道运输公司
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