What are the precautions for galvanized pipe welding?

Measures to ensure welding quality include:

1, the human factor is the focus of gas galvanized pipe welding control. Due to the lack of necessary post-welding control methods, it is easy to cut corners and affect the quality; at the same time, the welding specificity of galvanized pipe makes it difficult to ensure the quality of welding. Therefore, before the start of the project, a welder who is skilled and holds the appropriate boiler pressure vessel or equivalent welder's license should be selected to carry out the necessary technical training and handover, and to carry out on-site welder's examination and approval according to the boiler. Pressure vessel welder examination rules . Access to the welding site is permitted. Shall not be arbitrarily altered to ensure the relative stability of welders welding pipelines.

2, welding material control: to ensure that the procurement of welding materials from formal channels, quality assurance and certificate of conformity, in line with the process requirements; welding material acceptance, sorting, distribution procedures should be formal and complete, welding rod head recycling control should be strictly controlled to ensure that the flow of the dosage: Welding materials must be baked in strict accordance with the process, the dosage of welding materials shall not exceed half a day.

3, the welder: the welder is a tool for welding, must ensure reliable performance, in line with the process requirements; the welder must have a qualified current and voltmeter to ensure the correct implementation of the welding process. Welding cable should not be too long, longer welding parameters should be adjusted.

4, welding process methods: to ensure the strict implementation of special operating methods for galvanized pipe, according to the welding process for pre-weld bevel inspection, control of welding process parameters and operating methods, post-weld inspection of the appearance of the quality, and add the need to carry out non-destructive testing after welding. Control the level of welding and the number of welding consumables for each pass.

5, welding environment control: to ensure that the welding temperature, humidity, wind speed in line with the process requirements. Unconditional welding is not allowed.