API 5L Grade B Pipe Specifications

The table below summarises the core specifications of API 5L Gr.B pipe, covering applicable standards, sizes, forms and surface finishes.

Property Details
Standard API 5L
PSL Levels PSL1, PSL2
Outside Diameter 1/2 inch NPS (21.3 mm) to 80 inch (2032 mm)
Wall Thickness SCH 10 to SCH XXS (per ASME B36.10)
Length Single Random (5 to 7 m), Double Random (9 to 13 m), Cut Length
Forms Seamless, ERW, LSAW/DSAW, SSAW/HSAW
End Type Plain End, Bevelled End, Threaded
Surface Finish Bare, Black, Varnished, 3LPE Coated, FBE Coated
Delivery Condition As-rolled, Normalised, TMCP

API 5L Grade B Pipe Sizes and Dimensions

The following are the sizes and dimensions for API 5L grade B provided by Sachiya Steel.

Parameter Seamless ERW LSAW / DSAW
Size Range 1/2" to 24" NPS 2" to 24" NPS 16" to 80" OD
Dimension Standard ASME B36.10M ASME B36.10M ASME B36.10M
Available Schedules SCH 10, SCH 20, STD, SCH 40, SCH 60, SCH 80, SCH 120, SCH 160, XXS SCH 10, SCH 20, STD, SCH 40, SCH 60, SCH 80 STD, SCH 40, SCH 80
Wall Thickness Increases with the schedule number Increases with the schedule number Increases with the schedule number
Reference Weight (6" SCH 40) 28.26 kg/m (18.97 lb/ft) 28.26 kg/m (18.97 lb/ft) —

API 5L Grade B Pipe Price

As a general guide, standard ERW API 5L Grade B pipe in India is typically priced around ₹80-100 per kg. Seamless Grade B pipe usually begins around ₹110-140 per kg. For export, typical FOB prices range from about $0.90-$1.80 per kg, based on size, PSL grade, and order quantity. The price depends on the manufacturing process, outside diameter, wall thickness, PSL grade, coating, and order volume. Seamless pipe is more expensive than ERW pipe of the same size.

PSL2 pipe is slightly costlier than PSL1 because it requires additional testing and documentation. Coated pipe is quoted separately according to the coating system used. For up-to-date and precise pricing, contact Sachiya Steel International with your required size, wall thickness, PSL level, and quantity.

Chemical Composition of API 5L Gr.B Pipe

This table lists the maximum chemical composition limits for API 5L Grade B pipe under PSL1 requirements. PSL2 tightens these limits and adds mandatory carbon equivalent (CE) controls. Welded pipe has a lower carbon ceiling to support field weldability.

Carbon (C) C
0.28 seamless/0.26% welded
Manganese (Mn) Mn
Max 1.20%
Phosphorus (P) P
Max 0.030%
Sulphur (S) S
Max 0.030%
Vanadium (V) V
Max 0.06%
Niobium (Nb) Nb
Max 0.05%
Titanium (Ti) Ti
Max 0.04%

Mechanical Properties of API 5L Gr.B Pipe

API 5L Grade B pipe must satisfy the mechanical requirements listed below. PSL2 adds maximum caps and mandatory impact testing that PSL1 doesn't require.

Buyers specifying PSL2 should confirm the required CVN test temperature with their project engineer before placing an order.

245
MPa
Yield Strength
415
MPa
Tensile Strength
Property PSL1 PSL2
Min. Yield Strength 245 MPa (35,500 psi) 245 MPa (35,500 psi)
Max. Yield Strength Not specified 450 MPa (65,300 psi)
Min. Tensile Strength 415 MPa (60,200 psi) 415 MPa (60,200 psi)
Max. Tensile Strength Not specified 760 MPa (110,200 psi)
CVN Impact Testing Not required Mandatory
Request a Quote for API 5L Gr.B Pipes (PSL1 or PSL2) Request a Quote

Equivalent Grades of API 5L Gr.B Pipe

The table below lists equivalent designations by region. API 5L Grade B is recognised under several international standards.

Standard Designation
API 5L Grade B
ISO 3183 L245NB (PSL1) / L245MB (PSL2)
EN 10208-1/2 L245NB
GB/T 9711 L245
CSA Z245.1 Grade 241
DIN 17172 (superseded) StE 240.7
JIS G3456 / G3454 STPT 410 / STPG 370

Industrial Applications

API 5L Grade B line pipe is used across 3 primary sectors in pipeline and structural service.

Oil and Gas Transmission Pipelines

Grade B pipe transports crude oil, natural gas and refined petroleum products through onshore and offshore pipeline networks at low to medium operating pressures.

Water and Fluid Transportation

City water lines, factory pipelines, and slurry lines use L245 pipe because it is easy to weld and strong enough to be buried underground.

Structural and General Industrial Use

API 5L Gr.B pipe serves secondary roles in structural piling, plant piping, fire protection systems and mechanical tubing.

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect API 5L Grade B pipe from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Plastic end caps on threaded and plain-end pipes
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Pipe Bundle Yard Staging
Shipping packaging Container End-Cap Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies carbon steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

  • USA flagUSA
  • Canada flagCanada

Frequently Asked Questions

What is API 5L grade B pipe? +
API 5L Grade B is a carbon steel pipe used to carry oil, gas, and water. It has a minimum yield strength of 245 MPa and comes in several welded or seamless forms.
What is the difference between API 5L Grade B and ASTM A106 Grade B? +
API 5L Grade B is for oil, gas and water pipelines. ASTM A106 Grade B is a seamless pipe for high temperatures. Both have similar chemistry, but API 5L also allows welded pipes.
What is the difference between PSL1 and PSL2? +
PSL1 is standard quality. PSL2 is stricter: it limits strength, controls carbon equivalent, requires impact testing and full traceability. Use PSL2 for critical or sour-service pipelines.
What is the yield strength of API 5L grade B pipe? +
The specified minimum yield strength (SMYS) is 245 MPa (35,500 psi). Under PSL2, the maximum yield is capped at 450 MPa (65,300 psi).
What are the standard sizes of API 5L gr.B pipe? +
Sizes range from 1/2 inch NPS (21.3 mm OD) to 80 inch OD. Seamless covers 1/2 inch to 24 inch NPS. ERW covers 2-inch to 24-inch NPS. LSAW/DSAW spans 16 inch to 80 inch OD.
What is the hardness of API 5L grade B? +
API 5L doesn't specify a hardness limit for Grade B under PSL1. For PSL2 sour service, maximum hardness is typically 250 HV10 per NACE MR0175/ISO 15156.
What are the equivalent materials for API 5L grade B? +
Equivalent designations include ASTM A53 Grade B, ASTM A106 Grade B, ISO 3183 L245NB/L245MB, EN 10208 L245NB, CSA Z245.1 Grade 241, and GB/T 9711 L245.
What is the price of API 5L Grade B pipe? +
In India, the prices range around ₹80-100 per kg, and in the international market, prices range around $0.90-$1.80 per kg. Pricing varies by outside diameter, wall thickness, manufacturing method, PSL level, quantity, and coating requirements. Contact Sachiya Steel International with your specifications for current pricing and stock availability.

Contact Us for Availability & Current Pricing Request a Quote