What are the parameters of galvanizing process?

Galvanized pipe welding should pay attention to:

1. Galvanized steel pipe with pipe diameter greater than 100mm should be connected with flange or sleeve special pipe fitting.

2. galvanized steel pipe and flange welding, in order to ensure the quality of welding, should be galvanized welding treatment, the application of hand grinding wheel or sandpaper to clean the galvanized layer, or gas welding flame to remove the galvanized layer.

3. The welding of galvanized steel pipe and flange should be galvanized twice.

Measures to ensure welding quality are:

1. the human factor is the control focus of gas galvanized pipe welding. Due to the lack of necessary post-welding control means, it is easy to cut corners and affect the quality; At the same time, the special welding of galvanized pipe makes it difficult to ensure the welding quality. Therefore, before the start of the project, it should be selected skilled, preferably hold the corresponding boiler pressure vessel or equivalent welder certificate welders, carry out the necessary technical training, disclosure, refer to the boiler pressure vessel welder examination rules for on-site welder assessment and approval, give permission to enter the site welding. And shall not be replaced at will, to ensure that the welding of the pipeline welder is relatively stable.

2. welding material control: to ensure that the purchase is a regular channel of welding material, quality assurance, certificate, in line with the process requirements; The acceptance of welding materials and material issuance procedures should be complete, and the recycling of electrode heads should be strictly controlled to ensure the flow direction and dosage; The welding material should be baked strictly according to the process, and the dosage should not exceed half a day at a time.

3. welding machine; Welding machine is a welding machine, must ensure reliable performance, meet the needs of the process; The welding machine must have a qualified current and voltmeter to ensure the correct implementation of the welding process. The welding cable should not be too long. If it is too long, the welding parameters should be adjusted.

4. welding process method: ensure the strict implementation of the special operation method of galvanized pipe, according to the welding process for pre-welding groove inspection, welding process parameters, operation control, welding appearance quality inspection, if necessary, increase post-welding non-destructive testing. Control the welding level and the amount of welding material at each pass.

5. welding environment control: to ensure that the welding temperature, humidity, wind speed meet the process requirements. Do not weld unconditionally