API 5L Gr B PIPES
API 5L Grade B pipe is a standard carbon steel pipe widely used for transporting oil, gas, and water. It has a minimum yield strength of 245 MPa and a minimum tensile strength of 415 MPa, making it suitable for low to medium pressure applications. API 5L Gr B pipes are available in both seamless and welded forms, including ERW, EFW, and SAW.
This pipe grade is commonly used in the oil & gas, petrochemical, and water transmission industries. API 5L Grade B pipes are suitable for onshore and offshore service conditions and offer excellent weldability and durability. Seamless pipes are preferred for higher pressure services, while welded pipes such as ERW are ideal for long-distance and large-diameter pipeline systems.
API 5L Gr B pipe is a widely used carbon steel pipe designed for the transportation of oil, gas, and water. It offers a minimum yield strength of 245 MPa (35,500 psi) and a minimum tensile strength of 415 MPa (60,200 psi), making it suitable for moderate pressure and structural applications. API 5L Grade B pipes are available in both seamless and welded forms, including ERW, EFW, and SAW.
This pipe grade is extensively used in the oil & gas, petrochemical, and water transmission industries. API 5L Gr B pipes are suitable for onshore and offshore service conditions and are commonly used in pipeline systems where reliability and weldability are critical. Seamless pipes are preferred for higher pressure applications, while welded pipes are ideal for long-distance and large-diameter pipeline projects.
API 5L Gr B Pipe, API 5L Grade B, API 5L Gr B Pipe Manufacturer in India, API 5L Gr B Pipe Supplier
Applications of API 5L Gr B Pipes
| ● Oil & Gas Transportation Pipelines |
| ● Petrochemical & Refinery Industry |
| ● Water Supply & Distribution Systems |
| ● Structural & Construction Applications |
Specification Table of API 5L Grade B Pipes
| Specification | Details | |
|---|---|---|
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Product Specification
|
API 5L Grade B, PSL 1, PSL 2 | |
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Size
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1/2″ to 24″, * size above 24” NPS can be arranged on request | |
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Schedule
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SCH 10, SCH 40, SCH 80, SCH 160 to SCH XXS as per API 5L thickness | |
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Type
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Seamless, Welded, ERW, LSAW, HSAW | |
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Grade
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API 5L Grade B | |
Delivery Condition
| PSL | Delivery Condition | Pipe Grade |
|---|---|---|
| PSL 1 | As-rolled, normalized, normalizing formed | - |
| As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered (Q&T by agreement for SMLS) | - | |
| PSL 2 | As-rolled | BR |
| Normalized or normalizing formed | BN | |
| Quenched and tempered | BQ | |
| Thermomechanical rolled or thermomechanical formed | BM | |
| The suffix (R, N, Q or M) for PSL 2 grades belongs to the steel grade |
Process of Manufacturing
| Type of Pipe | PSL 1 | PSL 2 | ||
|---|---|---|---|---|
| Grade A | Grade B | Grade B | Higher Grades | |
| SMLS | ✔ | ✔ | ✔ | ✔ |
| LFW | ✔ | ✔ | ||
| HFW (ERW) | ✔ | ✔ | ✔ | |
| SAWL | ✔ | ✔ | ✔ | ✔ |
| SAWH | ✔ | ✔ | ✔ | ✔ |
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SMLS – Seamless Pipe (without weld) LFW – Low Frequency Welded Pipe (<70 kHz) HFW / ERW – High Frequency Welded Pipe (>70 kHz) SAWL – Submerged Arc Welded Longitudinal Pipe SAWH – Submerged Arc Welded Helical Pipe |
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Chemical Composition Table For API 5L Grade B Pipes
| Steel Grade | Mass fraction, % based on heat and product analyses a,g | ||||||
|---|---|---|---|---|---|---|---|
| C | Mn | P | S | V | Nb | Ti | |
| max b | max b | max | max | max | max | max | |
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| Grade B | 0.28 | 1.20 | 0.030 | 0.030 | d | d | d |
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| Grade B | 0.26 | 1.20 | 0.030 | 0.030 | d | d | d |
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a. Cu ≤ 0.50%; Ni ≤ 0.50%; Cr ≤ 0.50%; Mo ≤ 0.15% b. For each reduction of 0.01% below the specified maximum carbon content, an increase of 0.05% Mn above the specified maximum is permitted c. Unless otherwise agreed, Nb + V ≤ 0.06% d. Nb + V + Ti ≤ 0.15% e. Unless otherwise agreed f. Unless otherwise agreed, Nb + V + Ti ≤ 0.15% g. No deliberate addition of Boron is permitted and residual B ≤ 0.001% |
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Mechanical properties
| Pipe Grade | Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 1 |
Seam of Welded Pipe Tensile Strength b (Rm PSI Min) |
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|---|---|---|---|---|
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Yield Strength a (Rt0.5 PSI Min) |
Tensile Strength a (Rm PSI Min) |
Elongation (in 2in Af % min) |
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| Grade B | 35,000 | 60,200 | c | 60,200 |
Tensile and Yield of – API 5L Grade B Pipes
| Pipe Grade | Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 2 |
Seam of Welded Pipe Tensile Strength d Rm (psi) Min |
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|---|---|---|---|---|---|---|
|
Yield Strength a (Rt0.5 PSI) |
Tensile Strength a (Rm PSI) |
Ratio a,c Rt0.5 / Rm Maximum |
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| Minimum | Maximum | Minimum | Maximum | |||
| Grade B | 35,000 | 65,300 | 60,200 | 82,700 | 0.93 | 60,200 |
| a. For intermediate grades, the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given for the next higher grade. | ||||||
| b. For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same as determined for the pipe body. | ||||||
| c. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the standard API 5L formula. | ||||||
| U is the specified minimum tensile strength, expressed in megapascals (MPa) or PSI. | ||||||
U is the specified minimum tensile strength, expressed in megapascals (pounds per square inchg. Lower values fo R10,5IRm may be specified by agreementh. for grades > x90 refer to the full API5L specification.
API 5L Grade B Pipe Tolerances: Outside Diameter, Out-of-Roundness, and Wall Thickness
| Specified Outside Diameter D (in) | Diameter Tolerance, inches | Out-of-Roundness Tolerance, inches | ||
|---|---|---|---|---|
| SMLS Pipe | Welded Pipe | SMLS Pipe | Welded Pipe | |
| < 2.375 | -0.031 to +0.016 | -0.031 to +0.016 | 0.048 | 0.036 |
| ≥2.375 to 6.625 | +/- 0.0075D | -0.016 to +0.063 | 0.020D (D/t ≤ 75) | 0.015D (D/t ≤ 75) |
| >6.625 to 24.000 | +/- 0.0075D | +/- 0.0075D, max 0.125 | 0.020D | 0.015D |
| >24 to 56 | +/- 0.01D | +/- 0.005D, max 0.160 | 0.015D, max 0.060 | 0.01D, max 0.050 |
| >56 | As agreed | |||
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Notes: a. Pipe end includes 4 inches at each extremity. b. For SMLS pipes, tolerances apply for t ≤ 0.984in; thicker pipes as agreed. c. For expanded pipes with D ≥ 8.625in, tolerances may be based on inside diameter. d. Pipe diameter is defined as circumference/Pi. |
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