Hebei Tianze pipeline limited company specializing in the production of spiral steel pipe. The commonly used standard spiral pipe generally: SY/T5037-2000 (standard, also known as the common fluid pipeline with spiral submerged arc welded steel pipe, GB/T9711.1-1997 (GB), also called industrial oil gas transportation pipe technical delivery conditions - Part 1: steel pipes (up to now require strict GB/T9711.2 B grade steel), API-5L (United States) Petroleum Association, also called line pipe; which is divided into PSL1 and PSL2 two levels), SY/T5040-92 (pile with spiral submerged arc welded steel pipe).
Manufacturing process: spiral steel pipe is a strip coil as raw material, often warm extrusion molding in city, spiral double wire automatic submerged arc welding process double-sided welded pipe joints.
(1) raw material that is strip coil, welding wire, flux. Have to go through strict physical and chemical tests before they are put into the investment.
(2) strip head and tail docking, using single or double wire submerged arc welding, the steel tube rolled by automatic submerged arc welding welding.
(3) before molding, the strip passes through the leveling, trimming, planing, surface cleaning and conveying, and bending and handling.
(4) using the electric contact pressure gauge to control the pressure of the cylinder on both sides of the conveyor, to ensure the smooth delivery of the strip.
(5) the external control or internal control roll forming. Beijing spiral steel pipe / spiral steel pipe factory / spiral steel pipe prices
(6) using the welding gap control device to ensure that the weld gap to meet the requirements of welding, pipe diameter, the wrong side of the amount and the weld gap are strictly controlled.
(7) in welding and welding are used in the United States Lincoln welding machine for single or double wire submerged arc welding, thereby obtaining the stable welding specification.
(8) the welding seam after welding is through the online continuous ultrasonic automatic inspection, to ensure that 100% of the spiral weld nondestructive testing coverage rate. If there are defects, automatic alarm and spraying marks, the production workers at any time to adjust the process parameters, timely elimination of defects.
(9) the air plasma cutting machine to cut a single pipe.
(10) into a single tube, each batch of steel pipe should be carried out strict inspection system first, chemical composition and mechanical properties of weld, inspection, blending, surface quality of steel pipe as well as a nondestructive inspection, to ensure that the process of good control, can be formally put into production.
(11) in the weld on the site of continuous acoustic inspection marks, after manual ultrasound and X ray review, if there are defects, after repair, once again after the non destructive testing, until the defects have been eliminated.
(12) strip butt weld and intersect with the spiral seam type joint in the tube, all through X ray TV or film examination.
(13) each pipe is tested by hydrostatic pressure, and the pressure is sealed by radial seal. The test pressure and time are strictly controlled by the steel pipe water pressure computer testing device. Automatic print record of test parameters.
(14) the pipe end machining, the end verticality, accurate control of slope angle and blunt edge. Specification and classification of spiral tube: a pressurized fluid walks with spiral submerged arc welded steel pipe (SY5036-83) is mainly used to send oil and natural gas pipeline; pressure fluid transport with spiral seam high frequency welding steel tube (SY5038-83), high frequency welding method for welding, fluid retention of spiral seam high frequency welding steel tube feeding. Steel bearing ability, good plasticity, easy processing and welding molding; common low pressure fluid transport for spiral submerged arc welded steel pipe (SY5037-83), using double-sided automatic submerged arc welding or welding method made for submerged arc welded steel pipe for water, gas, air and steam as ordinary low pressure fluid conveyor