Cangzhou Rendezvous Pipeline Co. specializing in the production of spiral pipe. Common standards generally spiral: SY / T5037-2000 (Ministry of standard, also known as general fluid pipes with spiral submerged arc welded pipe), GB / T9711.1-1997 (GB, also known as the oil and gas industries - Steel pipe cross Cargo technical conditions for the first part: A grade steel (to the current demanding a GB / T9711.2 B grade steel)), API-5L (American Petroleum Institute, also known as line pipe; which is divided into two levels PSL1 and PSL2) , SY / T5040-92 (pile with spiral submerged arc welded pipe). Manufacturing Process: Spiral Pipe is a strip coil for raw materials, often warm extrusion molding the city to automatically double-wire submerged arc welding process double-sided spiral welded steel pipe (1) raw materials that strip, 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 steel by automatic submerged arc welding. (3) before forming the strip after flattening, cutting, trimming, planing, surface transport and to clean up the crimping process. (4) The 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. Beijing province spiral steel pipe / spiral steel pipe factory / spiral steel prices (6) of the weld gap control device to ensure that the weld gap to meet the welding requirements, diameter, misalignment and weld gap have been strictly controlled. (7) welding and outside welding Lincoln welding machine for single or double wire submerged arc welding, thereby obtaining a stable welding specifications. (8) finished welding the weld line ultrasonic injury examination was 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) air plasma cutting machine to cut a single tube. (10) cut into a single pipe, each batch of steel pipe should be carried out strict inspection system, the mechanical properties of the weld inspection, chemical composition, fusion status, quality steel surface and after NDT inspection, to ensure that the pipe process qualified before we can formally put into production. (11) with a continuous ultrasonic inspection mark the site of the weld, 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 butt weld, and intersect with spiral weld small joint where the pipe all through the X-ray television or film examination. (13) each pipe after hydrostatic test pressure radial seal. Test pressure and time by a 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. Spiral and specifications Category: Pressure fluid walks with spiral submerged arc welded pipe (SY5036-83) walked mainly used in petroleum, natural gas pipelines; pressure fluid walks with spiral seam high frequency welded steel pipe (SY5038-83) by high frequency lap welding method for pressurized fluid walked spiral seam high frequency welded steel pipe. Strong pressure steel can, plastic, and easy welding and machining molding; general low pressure fluid walks with spiral submerged arc welded pipe (SY5037-83), using double-sided automatic submerged arc welding or welding into the legal system for water, gas, air and steam and other general low pressure fluid walked SAW pipe.