API 5L Grade B Pipe Specification

API 5L Grade B pipe is a common grade pipe for oil and gas pipeline transmissions. It also called L245 Pipe refer ISO 3183, named by minimum yield strength 245 Mpa (35,500 Psi). Equivalent material ASTM A106 B or ASTM A53 B, which have similar value on chemical composition, mechanical properties, and applications.

API 5L B covers PSL1, PSL2, Sour Services, for onshore and offshore pipelines. Manufacturing types including seamless and welded.

PSL1, PSL2 and Sour Service Type

PSL1 is generally use which equivalent to ASTM A106 B and A53 B.

PSL2 is a higher specificaiton level pipe, has more strict value on chemical and mechanical strenth. More over PSL2 requires more test methods like None Distructive Test, CVN Impact Test, DWT etc.
API 5L B PSL2 expressed with API 5L BN/Q/R/M

Sour Services: For sour pipelines like H2S environment, pipe material have typical resrictions on chemicals element of Carbon, P and S. Referring standard NACE MR0175.

API 5L B Pipe for Sour Service expressed in API 5L BNS/QS/MS

Suffix Letter

Suffix letter specified the pipe delivery condition:

R: As rolled
N: Normalizing rolled, Normalized formed, Normalized
Q: Tempered and quenched
M: Thermomechanical rolled or thermomechanical formed
S: Sour Services, comes with PSL2 pipe with for NS, QS, MS, eg API 5L Grade B NS, API 5L B QS

Seamless and Welded (ERW, LSAW, SSAW/HSAW) Types

Seamless Type: Inlcuding hot rolled seamless for pipe diameter above 3 inch, cold rolled seamless below 3 inch.

ERW Welded Type: Electric Resistance Welded, for pipe diameter below 24 inch.

LSAW Type: Longitudinal Sub-merged Arc Welding, for pipe OD 20 inch to 48 inch. LSAW also called JCOE, it means pipe manufacturing shapes from J shape, C shape, O shape, and then cold expanding.

SSAW/HSAW Type:  Spiral Sub-merged Arc Welding or Helical SAW, for pipe OD up to 100 inch.

API 5L Grade B Pipe is Most Common Use Material

API 5L Grade B, ASTM A106 Grade B and A53 B, these three are most common use material for the industries where refers pipeline construction or oil and gas, liquid transmissions.

ASTM 106 pipe refers to the carbon steel pipe manufactured in hot rolled or cold drawn (rolled) seamless.

ASTM A53 pipe covers welded and seamless steel pipe, in carbon black material and some cases in hot dipped galvanized (zinc coated).

Difference Amoung API 5L Grade B, ASTM A106 Grade B, ASTM A53 Grade B, more details view here.

API 5L Grade B Pipe Data Sheet

API 5L Grade B Data Sheet Download

API 5L Grade B Pipe PSL1 Chemical Composition

a. Cu ≤ 0.50%; Ni ≤ 0.50% and Mo ≤ 0.15 %
b. For 0.01% reduce of maximum carbon, an increase of 0.05% Mn is permitted, up tp a maximum of 1.65% for grade ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grade > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.
c. Nb + V 0.06% unless agreed.
d. Nb + V + Ti ≤ 0.15% unless otherwise agreed.
e. Unless otherwise agreed.
f. Unless otherwise agreed, Nb + V + Ti ≤ 0.001%
g. No deliberate addition of B is permitted and the residual B ≤ 0.001%.

Mechnical Properties

a. For intermediate grades, the difference between the specified minimum tensile strength and minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
b. For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was
determined for the pipe body ung footnote a)
c. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as
determined using the following equation:

API 5L Grade B PSL2 Pipe Specification

Chemical Composition

Mechanical Properties

For API 5L B Sour Services Pipe Specifications please view here.

Our Supply Range

Octal offers API 5L B seamless carbon steel line pipe, product specification level in PSL 1 and PSL 2, and for sour services.

Attached below with our supply range for API 5L Grade B Pipe:
Grade: API 5L Grade BN/Q/M/NS/QS/MS
Manufacturing type: Seamless and welded ERW, LSAW, SSAW/HSAW
Outer Diameters for Seamless: 1/2” – 24”
OD for ERW: up to 24”
OD for LSAW: 16” to 48”
OD for SSAW/HSAW: up to 100”
Range of Thickness: Sch 20, SCH 40, SCH STD, SCH 80, SCH XS, SCH 120, SCH XXS, SCH 160
Range of Length: SRL, DRL, 20FT, 40FT
Product Specification Level: PSL1, PSL2, Sour Services
Ends: Plain, Beveled, Threaded
Coating Available: FBE, 3PE/3LPE, Black Painting, Varnished, Anti-rust oil, Galvanized, CRA, CWC

View here for API 5L pipe specifications

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