SSAW Spiral Submerged Arc Welded Pipe High Impact Strength
SSAW spiral submerged arc welded pipe
SSAW spiral submerged arc welded pipe includes ordinary spiral steel pipe and thick-walled spiral steel pipe. Thick-walled spiral steel pipe with respect to the general wall of the advantages of spiral steel pipe is: high compressive strength, high impact strength, high safety performance, longer service life. The strength of the SSAW spiral submerged arc welded pipe is generally higher than that of the straight seam welded pipe, and the pipe with larger diameter can be produced with a narrow billet. The pipe with different diameter can also be produced with the same width. SSAW spiral submerged arc welded pipe nominal diameter, also known as the average diameter. This is the tube from the metal tube is thin, tube diameter and tube diameter is almost the same, so the outer diameter of the tube and the tube diameter of the average as the diameter of the call.
SSAW spiral submerged arc welded pipe Processing technology
SSAW spiral submerged arc welded pipe is based on strip coil as raw material, often temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded seam steel pipe.
1 using the gap gap control device to ensure that the weld gap to meet the welding requirements, diameter, misalignment and weld gap are strictly controlled.
2 steel head and tail docking, the use of single or double wire submerged arc welding, rolled into steel pipe after the use of automatic submerged arc welding.
3 welding of the weld have been through the continuous continuous ultrasonic ultrasonic injury inspection to ensure that the spiral weld nondestructive testing coverage. If there are defects, automatic alarm and spray marking, production workers at any time to adjust the process parameters, the timely elimination of defects.
4 before forming, the strip through the leveling, cutting edge, planing edge, surface cleaning and delivery to the edge of the treatment.
5 using electric contact pressure gauge control conveyor pressure on both sides of the pressure to ensure a smooth delivery of the strip.
6 cut into a single steel pipe, each batch of steel pipe must be strictly seized the first inspection system to check the mechanical properties of the weld, chemical composition, melting conditions, steel pipe surface quality and after nondestructive testing to ensure that the pipe process qualified, Can be formally put into production.
7 welds with continuous acoustic flaw marks on the site, after manual ultrasound and X-ray review, if there are defects, after repair, again after the nondestructive test until the defect has been confirmed to eliminate.