Process notes of lsaw steel pipe

Process notes of lsaw steel pipe:

(1) Longitudinal volume of raw materials ie steel, wire, flux. Go through rigorous physical and chemical testing before it is put.

(2) Strip head and tail docking, a single wire or twin-wire submerged arc welding, in the rolled back using automatic submerged arc welding Longitudinal.

(3) Before forming the strip after flattening, cutting, trimming, planing, surface transport and to clean up the crimping process.

(4) Electrical contacts on both sides of pressure control conveyor cylinder pressure to ensure the smooth delivery of the strip.(5) The external control or internal control roller shape.

(6) The weld gap control device to ensure that the weld gap to meet the welding requirements, diameter, volume and the wrong side of the weld gap have been strictly controlled.

(7) Used in welding and outside welding Lincoln welding machine single-wire or twin-wire submerged arc welding, thereby obtaining a stable Longitudinal welding specifications.

(8) Finished welding the weld were injured after a online continuous ultrasonic instrument automatically checks to ensure 100% coverage of non-destructive testing spiral weld.If defects, automatic alarm and spraying tags, production workers and so at any time adjusting the process parameters, and remove defects.

(9) Using air plasma cutting machine will cut Longitudinal single.

(10) Cut into a single pipe, each consisting of three Longitudinal head first to conduct a rigorous inspection system, the mechanical properties of the weld inspection, chemical composition, fusion status, Longitudinal surface quality and after NDT inspection, Make sure the pipe process qualified before they can formally put into production.

(11) Marked the site of continuous acoustic testing on welds, through manual ultrasonic and X-ray review, if there are defects after repair again after destructive testing,until the confirmation defects have been eliminated.

(12) Strip Longitudinal butt welds and weld intersects with D-type connector where the pipe all through the X-ray television or film examination.

(13) Each Longitudinal after the hydrostatic test pressure radial seal. Test pressure and time by steel pipe pressure microcomputer detection device is strictly controlled. Test parameters are automatically printed record.

(14) Pipe end machining, so that the end vertical slope altercation and accurate control of the blunt edge.