API 5L Grade B (L245) Line Pipe
API 5L Grade B (L245) Line Pipe
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Specifications and Dimensions

  • Outer Diameter: 21.34 - 1,524 mm ( NPS ½″ - NPS 60″ )
  • Wall Thickness: 1.65 - 31.75 mm ( Sch 10-160, STD,XS, XXS )
  • Length: 3,000.0 - 12,000.0 mm
  • Customization is available.

Standard Specification

  • Standard: API 5L
  • Grade: Grade B

Quality Inspection

  • All products undergo rigorous inspection and testing before leaving the factory, and mill test certificates are provided.
  • The third-party inspection (such as SGS, BV, etc.) can be added as required.

Customizable Services

  • Surface Treatment: Original Surface(bare | black),Painting,Coating
  • Machining: Custom dimensions, precision cutting, threading, bending, bevel cutting, heat treatment, etc.

Packaging and shipping

  • Packaging: Steel-strap bundling, standard export packaging for ocean freight, or packaging as required
  • MOQ: 5 tons
  • Payment Terms:T/T, L/C
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What is API 5L Grade B (L245) Line Pipe?

API 5L Grade B line pipe is carbon steel pipe manufactured and inspected in accordance with the American Petroleum Institute’s API Specification 5L, “Specification for Line Pipe,” also known as L245 line pipe, and complies with the ISO 3183 standard (The technical requirements of API 5L and ISO 3183 are essentially the same, and the mechanical property requirements for ISO 3183 L245 are identical to those for API 5L Grade B.) It is primarily used in oil, natural gas, water, and other fluid transportation systems.

API 5L Grade B is typically manufactured from carbon-manganese steel and can be produced using seamless or welded (ERW, LSAW, SSAW/HSAW) processes. It covers two product specification levels—PSL 1 and PSL 2—to meet the requirements of various projects.

Grade B is one of the most widely used basic pipeline steel grades in the API 5L standard. It offers good strength, toughness, weldability, formability, and cost-effectiveness, and is extensively used in oil transmission pipelines, natural gas transmission pipelines, water conveyance pipelines, fluid conveyance systems in the petrochemical industry, and basic pipelines in the power and energy sectors.

We supply API 5L Grade B carbon steel pipes in a variety of diameters, wall thicknesses, and lengths, and can arrange custom dimensions, end finishing, surface treatment, inspection services, and export packaging according to customer requirements.

Specifications and Dimensions

# Product Name API 5L Grade B (L245) Line Pipe
Standard Specification API 5L ( Specification for Line Pipe )
Steel Grade Grade B
Cross-sectional Shape Round
Material Carbon Steel
Manufacturing Process Seamless,Welded
Outside Diameter 21.34 - 1,524 mm ( NPS ½″ - NPS 60″ )
Wall Thickness 1.65 - 31.75 mm ( Sch 10-160, STD,XS, XXS )
Length 3,000.0 - 12,000.0 mm
Type of Pipe End Flain end, beveled end, threaded end
Delivery Condition R,N,Q,M a)
Surface Treatment Original Surface(bare | black),Painting,Coating
Machining Services Custom dimensions, precision cutting, threading, bending, bevel cutting, heat treatment, etc
Inspection Dimensional inspection, chemical composition analysis, mechanical property analysis, hydrostatic testing, non-destructive testing, third-party inspection ( SGS, BV, etc )
Certificate Mill Test Certificate ( MTC, EN 10204-3.1/3.2 )
MOQ 5 tons
Delivery Time 15 - 20 days
Packaging Steel-strap bundling, standard export packaging for ocean freight, or packaging as required
Place of Origin China

a) R: As Rolled; N: Normalized; Q: Quenched and Tempered; M: Thermo-Mechanically Controlled Processed.

We offer customization for products with special specifications and sizes.

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