Gas pipeline leakage can repairing method

Abstract

The invention provides an iron box wrapping-repairing method for gas pipe leakage; the method includes the following steps of: 1) making a wedge-shaped wooden plug the diameter of which is similar to that of a leak source and driving the wooden plug into the leak source; 2) coating sealant on a slit between the wooden plug and the leak source; 3) making an iron box the opening of which can be matched with a pipe line according to the size of the leak source, arranging an air inlet and an air outlet on the iron box simultaneously and installing one air intake valve and one drain tap on the air inlet and the air outlet respectively; 4) filling paste with volume no more than 3 / 4 that of the iron box into the iron box in advance, and covering the iron box on the leak source in an inverted way; 5) introducing nitrogen in from the air intake valve, opening the drain tap simultaneously, installing a rubber tube on the drain tap, and drawing the rubber tube far away from the area of the leak source; 6) coating the sealant in the slit between the iron box and the pipe line to completely cut off the coal gas at a welding position; 7) welding the iron box and the pipe line after confirming that the concentration of CO at the area of the leak source is less than 30ppm; and 8) after welding, cutting nitrogen off, and closing the air intake valve and the drain tap.

Description

technical field [0001] The invention relates to a gas pipeline leakage iron box repair method, in particular to a treatment method for the leakage of a low-pressure gas pipeline in a gas system in the metallurgical industry. Background technique [0002] Gas pipelines in the metallurgical industry are generally laid overhead, located outdoors, exposed to the wind and the sun for a long time, the outer wall of the pipeline is prone to corrosion, and due to other external forces, the pipeline is often torn and traumatized, causing gas leakage. [0003] Gas pipelines leak, especially after a large amount of leakage, because the gas is poisonous, inflammable and explosive, it is often necessary to immediately stop the gas in the pipeline for maintenance. However, the production of the metallurgical industry has great continuity, and the stop of gas energy supply will cause very large economic losses. The utility model introduces a safe and effective method for dealing with larg...

AI Technical Summary

Problems solved by technology

[0009] 1. When welding and repairing the board, a large amount of gas leaks from the weld, and the gas is ignited during welding, making the welding very unsafe

And the closure of the weld becomes extremely difficult due to the gas pressure and the condensed water in the gas

[0010] 2. The user's suspension of production caused a huge loss in the economic benefits of the enterprise

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