An installation tightness process of stainless steel double-wall pipe

Abstract

The invention relates to a process for installing tightness of a stainless steel double-walled pipe. The process includes the following steps: S1, using several brackets to support the inner pipe; S2, sealing both ends of the inner pipe, and ventilating the inner pipe, Inspect the airtightness; S3. Lift the outer tube, put one end of the outer tube on one end of the inner tube, and move the outer tube along one end of the inner tube to the other end. During the moving process of the outer tube, remove the brackets near the end of the outer tube one by one. When one end of the inner tube passes through the other end of the outer tube, use a bracket to support the end of the inner tube; S4, seal the two ends of the outer tube and then inflate the outer tube to check the airtightness of the outer tube; S5, inside The equidistant parts are installed between the pipe and the outer pipe, and the equidistance parts are respectively welded and fixed to the outer pipe and the inner pipe, and the bracket is removed. The invention has simple and clear technical process, high installation efficiency, can ensure the installation accuracy of the double-wall pipe, is beneficial to the protection of the stainless steel pipe during installation, and can effectively check the tightness after installation to ensure the tightness of the connection between the inner and outer pipes.

Description

technical field [0001] The invention relates to the technical field of installation of pipe systems, in particular to a technique for installing tightness of stainless steel double-wall pipes. Background technique [0002] In shipbuilding and other equipment manufacturing industries, double-layer piping systems are sometimes used. For example, when a ship's cable passes through an oil tank, a double-layer pipeline is required. The cable passes through the inner tube, and the flammable oil is isolated outside the outer tube. The double-layer pipe wall can effectively ensure the isolation of oil and electricity, and ensure the safety of sailing. The installation, welding and tightness test of stainless steel double-wall pipes are more complicated than conventional single-layer pipelines. The control of the concentricity of the inner and outer pipes is the key point, and the tightness test of the inner and outer pipes is a technical difficulty. In order to ensure that the sea...

AI Technical Summary

Problems solved by technology

In order to ensure the tightness of the connection between the inner tube and the outer tube meets the requirements respectively, the inner tube and the outer tube need to be installed separately, and cannot be installed as a whole

In addition, the oil tank piping system is generally made of stainless steel, and special attention must be paid to the protection of stainless steel, which brings greater difficulty to the construction

[0003] The traditional pipe system installation process has relatively low precision, and the control of the concentricity of the inner pipe and the outer pipe cannot be guaranteed. If the accuracy is simply guaranteed, the inner pipe and the outer pipe are made into segments, and then the segmented If the inner pipe and the outer pipe are connected, the tightness of the inner pipe and the outer pipe cannot be checked independently, and the workload is relatively large

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