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LSAW Steel Pipe, Longitudinal Submerged Arc Welded Pipe

LSAW pipe (Longitudinally Submerged Arc Welding) is basically formed by pressing or rolling a single piece of medium-thickness steel plate into a pipe billet by mould or forming machine and is subsequently merged longitudinally (externally and internally) by submerged arc welding followed by expansion of pipe diameter. In this way, the welded joint is consistent, tough and tensile. In addition, the product features large diameter, thick wall, and good resistant of high pressure, low temperature and causticity.

LSAW pipe enjoys a wide range of specifications and is used in various fields including transformation of petroleum and natural gas, drilling, offshore platform, shipbuilding, chemical industry, construction, electrical engineering and others.

Production Range
1. Size: 16″~56 (457mm~1422mm)
2. Wall thickness: 8mm~50mm
3. Length: 5800mm~12300mm

Material
Q235, Q345, A25, B, X42, X46, X52, X56, X60, X65, X70, X80, etc

Standard
API Spec 5L (PSL1,PSL2), ASTM A252, ASTM A672, ISO3183, EN10219

Process

Steel plate - - - plate analyzing - - - vacuum lifting - - - plate ultrasonic testing (UT) - - - edge milling - - - pre-bending - - - JCO forming - - - pre-welding - - - run-on/ run-off tab welding - - - internal welding - - - external welding - - - run-on/ run-off tab removal - - - end facing - - - washing - - - mechanical expanding - - - washing - - - straightening - - - hydrostatic testing - - - auto UT - - - pipe end grinding - - - end beveling - - - X-ray testing - - - pipe end X-ray testing - - - pipe end circumferential U.T for lamination - - - internal coating - - - marking - - - delivery

Related Names
Flow Process Tube | Metal Petroleum Tubing | Double Side Welded Piping