Liaocheng Zhuoya Steel Co. Ltd.   

Harbin spiral pipe price spiral pipe specifications Tel: 15965258800, 13153811314, 15954162956 0635-5087755.5087055 Fax: 0635-8787458 contact: Zheng Wendong Spiral management on weight spiral pipe specifications. In the investment must go through strict physical and chemical inspection. (2) the strip head and tail docking, using single or double wire submerged arc welding in steel pipe, the automatic submerged arc welding. (3) before forming, strip after flattening, cutting edge, edge planing, surface cleaning to the transmission and bending process. (4) by controlling the conveyor on both sides of cylinder pressure electric contact pressure gauge, ensure the smooth conveying the strip. (4) by controlling the conveyor on both sides of cylinder pressure electric contact pressure gauge, ensure the smooth conveying the strip. (5) the external control or internal roll forming. (6) the weld gap control device to ensure the weld gap to meet the requirement of welding, pipe diameter, misalignment and seam gap have been strictly controlled. (13) each pipe by hydrostatic pressure test, the radial sealing pressure. (13) each pipe by hydrostatic pressure test, the radial sealing pressure. Test pressure and time by detecting device for strict control of hydraulic tube microcomputer. Test parameters automatically print records. (14) the pipe end machining, the end verticality, can accurately control slope angle and blunt edge. The characteristics of spiral pipe: longitudinal welded pipe has the advantages of simple production process, high production efficiency, low cost, rapid development. Spiral welded pipe ERW pipe strength than high, can use a narrow billet production of large diameter pipe, also can use the billet production and the width of the same diameter different welded pipe. But with the same length of straight pipe, weld length increased by 30100%, and lower production rate. Therefore, small caliber pipe adopt welded, large diameter welded pipe mostly using spiral welding Spiral pipe and its standard classification: pressurized fluid conveying seam submerged arc welding steel pipe with spiral (SY5036-83) is mainly used to transport oil, natural gas pipeline; pressure fluid delivery welded steel tube with spiral (SY5038-83), high frequency welding method of welding lap, used for pressure liquid transportation spiral welded steel pipe. Steel pipe pressure bearing capacity, good plasticity, easy welding and machining; general low-pressure fluid submerged arc welded steel pipe with spiral (SY5037-83), using double-sided automatic submerged arc welding or welding was made by submerged arc welded steel pipe for water, gas, air and steam conveying the low-pressure fluid Now commonly used standard spiral pipe is generally divided into: SY/T5037-2000 (standard, also known as the common fluid conveying pipe with spiral submerged arc welded steel pipe, GB/T9711.1-1997 (GB), also called industrial oil gas transportation steel technical conditions of delivery of the first part: steel pipes (to the strict requirements of GB/T9711.2 grade B steel tube), API-5L () America Petroleum Association, also called line pipe; which is divided into PSL1 and PSL2 two levels), SY/T5040-92 (pile for spiral submerged arc welded pipe) Spiral pipe material: Q235A, Q23b, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Q345 L245 L290 X42 X46 X70 X80

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