The production process of precision welded pipe has a little difference with the different production method, but the formation of welding part of the production process is basically the same, the difference only in the subsequent process. Typical production process is as follows:
1. The first production mode production process of precision welded pipe:
Strip preparation → open → flat → cut head → butt welding → live storage → forming → welding → remove the burr → weld heat treatment → cooling → sizing → nondestructive testing → Flying shear cut → straighten → cut flat head → eddy current testing / water pressure test → inspection packaging → finished
2. The second production mode production process precision welded tube:
Steel preparation → open roll → straightening → cutting head → butt welding → loose storage material → forming → welding → cleaning burr → weld heat treatment → cooling → sizing → nondestructive testing → flying shear cut off → preparation (drawing) → rolling → heat treatment → pickling → phosphating and saponification → cold drawing machine → straightening (cold rolling) → cutting flat head → oil lubrication → cold rolling mill → eddy current inspection → acceptance packaging → finished product
3. The third production mode production process precision welded pipe:
Strip preparation → open → flattening → cutting head → butt welding → live storage → forming → welding → cleaning burr → cooling → cold reducing machine → nondestructive testing → flying shear cut → heat treatment → straightening → flat head cut off → eddy current inspection → acceptance packaging → finished product
