L450 straight seam steel pipe Hebei Pu Hao straight seam steel pipe Co., Ltd. The main processing methods are: Forged steel: the use of a reciprocating hammer impact force or pressure presses the blank into what we need to change the shape and size of a pressure processing Methods. Extrusion: the steel of the metal simple squeeze on the closed, the pressure applied to one end of the metal from a predetermined hole in the extrusion mold to obtain a finished product with the shape and size of the processing method used for production of non-ferrous metal steel . Rolling: a steel metal blank by a pair of rotating rolls gap (various shapes), due to compression of the material roll reduced cross-section, the length of the increased pressure processing method. Pullout Steel: is already rolled metal blank (type, tubes, products, etc.) through the die hole pull aside into a reduced cross-section to increase the length of the processing methods are mostly used as a cold. Pipeline Co., Ltd., Hebei Pu Hao ERW welded pipe production and sales, the company's main steel pipe, high-frequency straight seam steel pipe, welded pipe, straight seam pipe, straight seam double submerged arc welding steel pipes, ERW steel pipe steel bridge Structural pipe exhaust using today's advanced roll forming technology, the electrical configuration using the German company Siemens PRC and the United Kingdom MENT digital DC speed control device to ensure that the unit high-precision, high-efficiency operation reliability. Producing ERW Longitudinal OD Φ13.5mm ~ Φ1820mm, wall thickness 0.8mm ~ 60mm ERW welded pipe material Q235A Q235B Q235C Q345B Q345C Q345D Q345E Q345F 10 # steel 20 # steel X42-X70 L245 L290 L360 and so on. The company produces ERW Longitudinal all in accordance with the national standard GB/T3091-2001, GB/T9711.1 GB/T9711.2 GB/T13793-92, GB/T6728-2002 API5LPSL1 API5LPSL2 organize production. Since its inception, the production of ERW Longitudinal reached advanced domestic and international industry standards. And passed the ISO9001: 2000 quality management system certification. The company produces ERW Longitudinal complete specifications, excellent price, good quality. My company is willing to cooperate sincerely with all levels of users are welcome to visit us.