API 5L Grade B is equivalent to ASTM A106 Gr.B and ASTM A53 Gr.B. API 5L Grade B is a pipeline steel pipe specification developed by the American Petroleum Institute, mainly used for oil and gas pipelines. ASTM A106 Gr.B and ASTM A53 Gr.B are standards of the American Society for Testing and Materials, mainly used for high temperature or structural applications.
Basic information of API 5L Grade B
API 5L Grade B is a steel grade in the API SPEC 5L standard, equivalent to the L245 grade. It is mainly used in oil and gas transportation projects such as oil pipelines and natural gas pipelines, with excellent mechanical properties and corrosion resistance.
Basic information of ASTM A106 Gr.B and ASTM A53 Gr.B
ASTM A106 Gr.B: Mainly used for conveying high temperature and high pressure fluids, with good high temperature resistance. It is suitable for boiler pipes, steam pipes, petrochemicals, pipeline natural gas and other fields.
ASTM A53 Gr.B: Steel pipes suitable for general use, commonly used for the transportation of low-pressure fluids such as water, gas, and steam.
Comparison of chemical composition between API 5L Grade B, ASTM A106 Gr.B, and ASTM A53 Gr.B
API 5L Grade B pipe Chemical Composition
|
Grade |
Chemical Composition |
|||||||
|
API 5L Grade B PSL1 Pipe |
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
|
0.16 |
0.45 |
1.65 |
0.020 |
0.010 |
0.07 |
0.05 |
0.04 |
|
A106 Grade B Carbon Steel Heat Exchanger Tubes Chemical Composition
| Standard | Grade | Chemical Composition % | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Cr | Cu | Ni | Mo | V | ||
| ASTM A106 | B | ≤ 0.30 | 0.29-1.06 | ≤ 0.035 | ≤ 0.035 | > 0.10 | ≤ 0.40 | ≤ 0.40 | ≤ 0.40 | ≤ 0.15 | ≤ 0.08 |
A53 welded steel pipe chemical requirements
| ERW | C max % | Mn max % | P max % | S max % |
|---|---|---|---|---|
| Grade B | 0.30 | 1.20 | 0.05 | 0.045 |
Comparison of mechanical properties between API 5L Grade B, ASTM A106 Gr.B, and ASTM A53 Gr.B
Mechanical Properties of API 5L Class B Pipes
|
Grade |
Permissible yield point ratio |
Yield Strength MPa(min) |
Tensile Strength MPa |
Elongation % (min) |
|
API 5l Grade B Pipe |
≤ 0.85 |
290 |
420 - 540 |
23 |
A106 Gr. B carbon steel seamless pipe Tensile Requirements
| Grade B | |
| Tensile Strength, min., psi | 60,000 |
| Yield Strength, min., psi | 35,000 |
A53 welded carbon steel pipe mechanical properties – tensile requirements
| ERW | Grade B |
|---|---|
| Tensile Strength, min, psi | 60,000 |
| Yield Strength | 35,000 |
