Characteristics and Application of ERW Straight Seam Welded Pipe

Production technology of oil casing


Cold drawing:
Tube blank - Inspection - shear - heating - hot piercing - tap - capillary storage - pickling, phosphating, saponification - cold drawing - heat treatment - physical and chemical experiments - straightening - cutting head and tail - surface and dimensional inspection - eddy current testing - Ultrasonic testing - wire turning and tube end machining
Hot-rolling:
Tube blank - Inspection - cutting - ring furnace heating - piercing - tube rolling - reducing micro tension - straightening - cutting head and tail - Inspection - NDT - hydraulic testing - turning wire and tube end


quality testing:
Routine NDT + hydrostatic test (MPI for magnetic particle test, et for eddy current test, UT for ultrasonic test, RT for radiographic test).