LSAW steel pipe industry usage

LSAW pipe in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.


LSAW pipes are mainly used as long distance transportation pipeline for oil, gas, liquid coal etc. on land and offshore.

And also can be applied as construction pipes on offshore platform, power station, petrochemistry and city construction etc.

Size range:

  • O.D: Ф323.8-Ф1822.4mm
  • Length: Max.12.2m(40ft)
  • Wall Thickness: When the steel grade is X70
  • the wall thickness ranges from 6.4 to 26.4mm(0.252-1.04in);

When the steel grade is lower, the wall thickness will be increased accordingly

Product Standard:

  • ISO3183-3
  • API Spec 5L
  • GB9711
  • ASTM A53
  • ASTM A252
  • ASTM A500

Steel grade : GR.B, X42, X46, X52, X56, X60, X65, X70, API 5L PSL1 & API 5L PSL2

Capacity: The annual output is 0.2-0.3million tons

Major characteristics

① The pipe internal stress is very small and uniformly distributed after the full- length expansion. The corrosion and cracking of the pipe owing to stress can be effectively prevented.

The application of welding on site is very easy because of the high dimension precision;

② The inside and outside welding are performed after the tack welding, so the welding process is very stable with good weld quality;

③ The NDT is easy to perform on the weld during production and field operation as well;

④ The length of the weld is shorter than that of the non-longitudinal seam pipe, so the probability of defects occurrence is very low;

⑤ The coverage of the pipe specification is very wide. The pipe can be either in very large diameter with thick wall or in very small diameter with thick wall.