1, check the material and specifications are in line with the design requirements, material certification and certification is complete, there are cracks, wrinkling, stratification and other defects, should refuse to use.

2, electrode requirements: welding carbon steel electrode using E4303 electrode, welding 16Mn steel electrode using E5016 electrode. When 16Mn steel and carbon steel joints at E4316 electrode. Before the use of electrodes, should be carried out according to the instructions, and in use to keep dry, the electrode coating should be no shedding and obvious cracks.

3, roll pipe wall thickness ≥ 6mm should be in the next material, playing a good groove, with groove machine processing groove.

4, first do pressure head processing, and then roll.

5, according to the diameter of the tube diameter production model, the arc length of the pipe circumference of 1/6 ~ 1/4, do not fit the gap to meet the requirements.

6, pipe, pipe group on the time, should check the groove quality. And the inner and outer sides of the groove to clean up, rust can be used grinding machine grinding.

7, wall thickness of different pipe butt welding, the difference between the two wall thickness shall not be greater than the wall thickness of 15%, and shall not exceed 3mm.

8, different diameter pipe welding, the tube can be welded to the end of the processing of the size of the head, can also be used to produce the size of steel head.

9, the formal welding of welding materials the same process.

10, the general first brush two red salad antirust paint, and then brushing two different colors of oil to reconcile a variety of enamel paint.