C&N industrial Group, pipe, fitting and flanges manufacturers,fbe epoxy and pe coating for pipeline since 1991,with brand C&N huitong ,C&N hongcheng.
API 5L GR.B PSL2 SMLS Bend
Specification
Products: seamless bends (22.5°/45°/90°), R=8D
Standard: ASME B16.49
Material: API 5L GR.B PSL2 (X241)
Size: 6 inches (DN150), wall thickness 10.97 mm
Application: Long‑distance pipelines, oil & gas gathering and transmission, industrial piping
In fields such as long-distance pipelines, oil & gas, and high-pressure fluid transmission, piping systems often face multiple harsh conditions including high pressure, low temperature, and sour media, etc. Under such extreme environments, selecting proper and reliable pipe fittings is directly critical to the long‑term safety and operational cost of a project.
API 5L Grade B PSL2 is a carbon steel line pipe material conforming to API 5L and ISO 3183 standards. Its minimum yield strength is 35,500 psi (245 MPa), and the minimum tensile strength is not less than 60,200 psi (415 MPa). Compared with ordinary carbon steel bends, the PSL2 grade imposes stricter limits on harmful elements phosphorus and sulfur (P≤0.025%, S≤0.015%), and mandates impact toughness at 0°C (longitudinal ≥41 J, transverse ≥27 J) as well as 100% non‑destructive testing. This significantly reduces the risk of low‑temperature brittle fracture and welding cracks, making it especially suitable for severe service conditions such as high pressure, sour media, cold climates and offshore environments. The design life can reach more than 30 years, providing reliable assurance for project execution.
API 5L Grade B PSL1 PSL2 Line Pipe Comparison Table
PSL1 | PSL2 | |
| CVN impact (Charpy) testing | None required | required for all grades |
| Nondestructive inspection of seamless | Only when purchaser specifies SR4 | SR4 mandatory |
| Certification | Certificates when specified per SR15 | Certificates (SR 15.1) mandatory |
| Traceability | Traceable only until all tests are passed, unless SR15 is specified | Traceable after completion of tests (SR 15.2) mandatory |
| Hydrostatic Test | Required | Required |
Chemical Composition API 5L Pipes Grade B In PSL2 Line Pipe
| PSL 2 | ||||||||||||
| GRADE | Chemical Composition | Mechanical Property | ||||||||||
| C (Max) | Mn (Max) | P (Max) | S (Max) | Tensile | Yield | C. E. IMPACT ENERGY | ||||||
| Psi x 1000 | Mpa | Psix1000 | Mpa | PCM | IIW | J | FT/LB | |||||
| B | 0.22 | 1.20 | 0.025 | 0.015 | 60-110 | 414-758 | 35-65 | 241-448 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
API 5L GRB PSL2 Line Pipe Physical Properties
| API 5L Grade | Yield Strength min. (ksi) | Tensile Strength min. (ksi) | Yield to Tensile Ratio (max.) | Elongation min. %1 |
| B | 35 | 60 | 0.93 | 23 |
Production Process of API 5L GR.B PSL2 Seamless Pipe
Billet Heating
Temperature control: 1200±50°C (uniform through-heating required)
Piercing
Solid billet → hollow shell via cross-roll piercing mill
Rolling & Sizing
Wall thickness reduced to 7.11 mm with ±0.5 mm precision (per API 5L 9.3.2.1)
Heat Treatment
Normalizing or Quenching+Tempering for optimized metallography
Finishing & Testing
Surface polishing → Stencil marking → Hydro test at ≥15 MPa (ASME B31.8)
API 5L Grade B ERW Pipe Coating Standard
- ANSI/AWWA C104/A21.4 American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water
- ISO 21809 Petroleum and natural gas industries – External coatings for buried or submerged pipelines used in pipeline transportation systems
- DIN 30670 Polyethylen coatings of steel pipes and fittings
| PSL 2 Pipe Coating Type | PSL 2 Pipe Coating Layer | PSL 2 Pipe Coating thickness |
|---|---|---|
| Three layers polyethylene | Inside layer: epoxy (Green) | 2.0 -4.5mm |
| Mid layer: adhensive (White) | ||
| Outsidelayer:polyethylene (Black) | ||
| Two layers polyethylene | Inside layer: adhensive | 2.0 -4.5mm |
| Outside layer: polythene | ||
| Epoxy | Epoxy | 200-400um |
| Two layers epoxy | Inside layer: expoxy (Green) | 400-800um |
| Outside layer:intensity epoxy (sage green) | ||
| Three layers polyethylene | Inside layer: expoxy (Green) | 2.5 -3mm |
| Mid layer: adhensive (White) | ||
| Outside layer: polypropylene (White) |
API 5L 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% |
If you are looking for bends that guarantee the integrity of long‑distance pipelines under harsh operating conditions without deformation or leakage, the ASME B16.49 API 5L GR.B PSL2 seamless bend is your reliable choice. C&N is one of China’s leading manufacturers of line pipe bends, offering a wide range of specifications and materials. Please contact us for any requirements.
