API 5L Grade B or L245 PSL1 Line Pipe
API 5L Grade B or L245 PSL1 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 (PSL1)

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 or L245 PSL1 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 and API 5L Grade B are identical.) It is primarily used in oil, natural gas, water, and other fluid transmission systems.

API 5L Grade B line pipe is typically manufactured from carbon-manganese steel and encompasses two product specification levels: PSL1 and PSL2. It can be produced using seamless or welded (ERW, LSAW, SSAW/HSAW) processes to meet the diameter and pressure requirements of various projects. Among these, PSL2 imposes stricter requirements on chemical composition, mechanical properties, impact toughness, nondestructive testing, and quality control; However, PSL2 does not indicate a higher strength grade than PSL1; rather, it signifies more comprehensive and stringent quality and inspection requirements.

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 or L245 PSL1 Line Pipe
Standard Specification API 5L ( Specification for Line Pipe )
Steel Grade Grade B (PSL1)
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 Plain 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.

Chemical Composition

Table 2-1: Chemical Composition for API 5L Grade B or L245 PSL 1 Pipe with t ≤ 25.0 mm (0.984 in.)

Steel GradeTypeMass Fraction, Based on Heat and Product Analyses % a, g
C bMn bPSVNbTi
L245 or BSeamless Pipe≤ 0.28≤ 1.20≤ 0.030≤ 0.030c, dc, dd
L245 or BWelded Pipe≤ 0.26≤ 1.20≤ 0.030≤ 0.030c,dc,dd

a Based on product analysis, for seamless pipe with t > 20.0 mm (0.787 in.), the CE limits shall be as agreed; the CEIIW limits apply if C > 0.12 % and the CEPcm limits apply if C ≤ 0.12 %.

b For each reduction of 0.01 % below the specified maximum for C, an increase of 0.05 % above the specified maximum for Mn is permissible, up to a maximum of 1.65 % for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75 % for grades > L360 or X52, but < L485 or X70; up to a maximum of 2.00 % for grades ≥ L485 or X70, but ≤ L555 or X80; and up to a maximum of 2.20 % for grades > L555 or X80.

c Unless otherwise agreed, Nb + V ≤ 0.06 %.

d Nb + V + Ti ≤ 0.15 %.

g Unless otherwise agreed, Nb + V + Ti ≤ 0.15 %.

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