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Our company is specialized in metal pipes and pipe fittings products R & D, design, production and sales, is the domestic high grade steel, resistant to high pressure, large diameter end pipe fittings products professional supplier. The company production of straight seam submerged arc welded steel pipe, steel pipe diameter ( LSAW ): with 219 with 1420mm: 3-12m; steel pipe length of longest 18.4m; wall thickness: 8-50mm, pipe wall thickness is reduced with material and different degree increment; steel material Q235, Q345, L245-L360, X42-X70. Longitudinal submerged arc welded pipe ( LSAW ) is the single plate as raw material, the plate in the mold or forming pressure (volume ), using double-sided submerged arc welding and expanding into production. The finished product specifications range is wide, the toughness of welding metal, plastic, uniformity and compactness is better, with big diameter, wall thickness, high pressure resistance, low temperature resistance and strong advantages. In the construction of high strength, high toughness, high quality of long distance oil and gas pipeline, pipe is mostly needed in large diameter thick wall longitudinal submerged arc. According to the API standard, in large oil and gas conveying pipeline, when the alpine zone, sea, city populated area in 1 categories, 2 kinds of areas, longitudinal submerged arc is the only designated for tube type. According to the forming in different ways can be divided into:

UOE: single plate at the edge of pre bend molding, the U, O forming, welding, welding, mechanical cold expansion process;

JCOE: press" J-C-O-E" tack welding, molding, welding after cold expanding process;

HME: by the mandrel rolling process according to the" C-C-O" forming, welding after cold expanding process.

Product standards: 1, ISO3183-3, API Spec 5L, GB / T9711, 2, GB / T3091-2001, GB / T13793-92, GB / T6728-2002, the company an annual output of large caliber straight seam submerged arc welded steel pipe 20 - 300000 tons. Products are mainly used in onshore, offshore oil and gas, coal slurry, pulp and the conveying medium and marine platform, power plant, chemical and city building structural tube.