API 5L Grade B Line Pipe


  • Nominal Pipe Size 1/2″ to 48 ” O.D; Length: 5m to 12m.
  • Wall Thickness – Schedule 10 through 160, STD, XS, XXS.
  • Product Specification Level (PSL) : PSL 1,PSL 2
  • Manufacturing process: SSAW, LSAW, ERW welded/Seamless
  • Ends: Plain, beveled Ends and Threaded Ends

The American Petroleum Institute specification API 5L is designed for transportation systems in the petroleum and natural gas industries for conveying gas, water, and oil. API 5L grade B is a steel grade of API 5L which specifies the manufacture of two product levels (PSL1 and PSL2) line pipe. WLD Steel is one of the large manufacturers, suppliers of  API 5L steel pipe, we also provide internal & external coating like Black paint, varnished, FBE coating, 3LPE coating and all lined pipe on steel pipes as per the customers’ requirement. WLD steel supply and manufactured a large inventory of  API 5L Gr.B steel pipe in PSL1 and PSL2.

API 5L  Grade B Delivery Condition

PSL Pipe grade Delivery Condition
PSL1 B As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered or if agreed Q&T SMLS only
PSL2 BR As-rolled
PSL2 BQ Quenched and tempered
PSL2 BQ Thermomechanical rolled or thermomechanical formed

API 5l Grade B Equivalent

Material Grade PSL1 Grade B or L245
Material Grade PSL2 L245R or BR

L245N or BN
L245Q or BQ

API 5L Grade B Chemical Composition

Grades C Si Mn S S V
Gr.B PSL 1(Seamless) 0.28 / 1.2 0.3 0.3 c,d
Gr.B PSL1(Welded) 0.26 / 1.2 0.3 0.3 c,d
Gr.BR 0.24 0.4 1.2 0.025 0.015 c
Gr.BN 0.24 0.4 1.2 0.025 0.015 c
Gr.BQ 0.18 0.45 1.4 0.025 0.015 0.05

API 5L Gr.B Mechanical Property

Grades Yield Strength, psi Tensile Strength, psi Elongation,in 2in
B(PSL1) 35,500 60,200 c
BR, BN,BQ,BM(PSL2) 35,500-65,300 60,200-95,000 f