How thick is API 5L Grade B pipe?
API 5L Gr.B seamless steel pipe is a critical material widely used in oil and gas transmission pipeline systems. It delivers exceptional mechanical properties, corrosion resistance, and reliability.
Product Specifications:
Outer Diameter: 21.3mm ~ 762mm
Wall Thickness: 2.0mm ~ 140mm
API 5L Grade B Pipe Chemical Composition
|
PSL1 |
PSL2 |
|||||||
|---|---|---|---|---|---|---|---|---|
| Grade | C (Max.) | Mn(Max.) | P(Max.) | S(Max.) | C (Max.) | Mn(Max.) | P(Max.) | S(Max.) |
| B | 0.26 | 1.20 | 0.03 | 0.03 | 0.22 | 1.30 | 0.025 | 0.015 |
API 5L Grade B Line Pipes Tolerance Specifications
| Tolerance on dimension | |||||
|---|---|---|---|---|---|
| OD Tolerance | WT Tolerance | ||||
| A, B | X42 ~ X70 | ||||
| D<60.3mm | +0.41/-0.40mm | D<73mm | +20%/-12.5% | D<73mm | +15%/-12.5% |
| D>=60.3mm | +0.75/-0.40mm | D>=73mm | +15%/-12.5% | D>=73mm | +15%/-12.5% |
API 5L Gr B Yield Strength
|
Pipe Grade |
Tensile Properties - Grade B Pipe Body of SMLS and Welded Pipes PSL 1 |
Seam of Welded Pipe |
||
|---|---|---|---|---|
|
Yield Strength a |
Tensile Strength a |
Elongation |
Tensile Strength b |
|
|
Grade B |
35,500 |
60,200 |
c |
60,200 |
What is the difference between API 5L GRB and A53 GRB pipe
| Comparison Item | API 5L Gr.B (Oil & Gas Pipeline) | ASTM A53 Gr.B (General Structural) |
|---|---|---|
| Governing Standard | API SPEC 5L (Severe Service) | ASTM A53 (Basic Applications) |
| Operating Temp | -46°C ~ 427°C | -29°C ~ 343°C |
| Mechanical Properties | Tensile≥414MPa, Yield≥240MPa | Tensile≥415MPa, Yield≥240MPa |
| Corrosion Resistance | Mandatory H₂S Testing (NACE MR0175) | No Special Requirement |
| NDT Requirements | 100% UT + Eddy Current (PSL2) | Hydro Test Sampling (No Mandatory UT) |
| Low-Temp Toughness | ≥27J at -30℃ (L245N) | Not Required |
| Pipe Types | Seamless/Welded | Seamless/Welded/Spiral Welded |
| Typical Applications | ► Long-distance pipelines ► Sour gas gathering |
► Structural frames ► Low-pressure water/HVAC |
Test and inspection
Packaging and shipping
