Pipeline welding process

Abstract

The invention provides a pipeline welding process. The pipeline welding process comprises the steps of welding a root layer through manual welding and welding a filling layer and / or a cover surface layer through an automatic welding machine. The welding process provided by the invention has the advantages that under the circumstance of not increasing welders on a large area, the construction progress is promoted and the labor cost is greatly reduced; the welding construction of large-diameter thick-walled pipelines can be carried out on a large area and the production efficiency is high; moreover, the first pass yield of welding lines is high by adopting the welding process provided by the invention, unnecessary reworking is avoided, the construction quality is high and the quality cost isreduced; and the operability of the construction process is high, the operation is easy, the quality accident rate and the safety accident rate in the practical application are both zero and the process is safe and reliable.

Description

technical field [0001] The invention relates to the field of process pipeline construction, and more specifically, relates to a pipeline welding process. Background technique [0002] The construction of process pipelines has always been a key and difficult point of the whole project, especially the construction of large-caliber thick-walled pipelines (the diameter of which is not less than 320mm and not greater than 600mm) is more difficult; only by speeding up the progress of pipeline prefabrication and improving the quality, Relief of stress during the piping installation phase is the preferred approach. In order to catch up with the construction period, the traditional method of pipeline construction must be to deploy a large number of manpower to the site for battle, that is, to adopt the "crowd tactics"; but now the cost of labor is increasing, high-level skilled workers are not easy to find, and outsourcing teams and personnel are highly mobile. Therefore, it will br...

AI Technical Summary

Problems solved by technology

In order to catch up with the construction period, the traditional method of pipeline construction must be to deploy a large number of manpower to the site for battle, that is, to adopt the "crowd tactics"; but now the cost of labor is increasing, high-level skilled workers are not easy to find, and outsourcing teams and personnel are highly mobile. and other reasons, so it will bring a series of problems: increased labor costs; difficult to guarantee quality; chaotic management; increased investment in temporary construction, etc.

[0003] During the construction of the large-diameter A691-1.25CR-Cl22 pipe, the construction progress was slow, the investment in personnel and equipment was large, and the construction quality was difficult to guarantee, which led to the overall lag in the installation of the device pipeline.

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