Longitudinal Submerged Arc Welded Steel Pipes (LSAW Pipes) | Hebei Haihao Group

Longitudinal Submerged Arc Welded Steel Pipes (LSAW Pipes)

Longitudinal submerged arc welded steel pipe can be abbreviated to LSAW steel pipe,is a type of longitudinally welded steel pipe produced by using the double sided submerged arc welding method.LSAW steel pipes are made of steel plates cut from leveled hot rolled coils by JCOE and UOE forming processes (the plate like the letter “J”,”C”,”O” or “U” shape in the forming process),then expansion.

Longitudinal submerged arc welded (LSAW) steel pipes

Longitudinal submerged arc welded (LSAW) steel pipes

Specification of longitudinal submerged arc welded steel pipes(LSAW pipes):

Outside diameter: 406.4mm-1422.4mm

Wall thickness: 8mm-60mm

Length: 3m-12m

Standards: API Spec 5L(PSL1 and PSL2), ASTM A252, ASTM A672,ISO3183,etc

Grades:

API 5L Gr B,X42,X52,X56,X60,X65,X70,X80,etc

Package: bags,bundles,PVC packing,carton packing,wooden case,or as customer request.

Manufacturing process of longitudinal submerged arc welded steel pipes(LSAW pipes):

Longitudinal submerged arc welded steel pipes LSAW pipes with JCOE manufacturing process:

Ultrasonic testing plate->plate turning->plate edge milling->plate edge buffing->JCO forming->post bending->tack welding->pipe cleaning->inside welding->outside welding->radiographic testing->mechanical expanding->heat treatment->pipe end chamfering->hydrostatic testing->pipe ultrasonic testing->radiographic testing->external coating->internal coating->marking->delivery

Longitudinal submerged arc welded steel pipes LSAW pipes with JCOE manufacturing process

Longitudinal submerged arc welded steel pipes LSAW pipes with JCOE manufacturing process

Longitudinal submerged arc welded steel pipes LSAW pipes with UOE manufacturing process:

Plate stock->edge preparation milling->edge crimping->”U” press->”O” press->internal & external DSAW->weld seam ultrasonic testing or X-ray->electro-slag overlay welding ->mechanical expander->weld seam ultrasonic testing or X-ray->hydrostatic testing->end-facing and bevelling->customer acceptance

Longitudinal submerged arc welded steel pipes LSAW pipes with UOE manufacturing process

Longitudinal submerged arc welded steel pipes LSAW pipes with UOE manufacturing process

Haihao Group introduce advanced JCOE production equipment,specializing in the production of thick-walled large-diameter straight seam double submerged are welded pipe products with diameter of 406.4mm-1422.4mm,length 3m-12m,wall thickness 8mm-60mm,can be used for oil and gas transmission pipe,piling steel pipe bracket pipe,the bridge steel pipe,various exhibition center truss steel.

We also can supply & manufacture seamless steel pipes,welded steel pipes(ERW pipes and SSAW pipes),butt welding pipe fittings,forged pipe fittings and forged flanges,which according to international standards or customized,if you want to know more about our piping products,please email us:sales@haihaogroup.com

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