API 5L Gr.B X42 X52 X60 X65 X70 Seamless Carbon Steel Pipe

1. Product Description
This API 5L seamless carbon steel pipe is a high-strength line pipe manufactured without a weld seam, suitable for conveying oil, gas, water, and other fluids under pressure. Available in grades Gr.B, X42, X52, X60, X65, and X70, it conforms to API Specification 5L for line pipe. The seamless construction eliminates longitudinal weld defects, providing superior pressure integrity and reliability in critical pipeline applications. Available in PSL1 and PSL2 specification levels.

2. Key Specifications

• Standard: API 5L (PSL1 / PSL2), ISO 3183

• Steel Grade: Gr.B, X42, X52, X60, X65, X70

• Outside Diameter: 13.7 mm – 762 mm (1/2” – 30”)

• Wall Thickness: 1.65 mm – 80 mm (SCH20 – SCH160, STD, XS, XXS)

• Length: 5–12 m (single random / double random / customized)

• Pipe Ends: Plain ends / Beveled ends / Threaded & Coupled

• Manufacturing Process: Hot rolled / Cold drawn

• Surface Treatment: Bare, black paint, varnish, 3PE/FBE coating, galvanized

• Third-Party Inspection: SGS, BV, or as required

3. Applications
Widely used in petroleum and natural gas transmission pipelines, water and sewage pipelines, mineral slurry pipelines, refinery piping, boiler pipes, and high-pressure fluid transportation systems . Suitable for both onshore and offshore pipeline projects requiring high strength and reliable pressure containment.

4. Product Advantages

• Seamless construction with no longitudinal weld seam, eliminating weld-related defect risks and providing higher pressure integrity

• Higher yield strength grades (X42–X70) allow reduced wall thickness for equivalent pressure ratings, lowering material and transport costs

• Excellent toughness and weldability when produced to PSL2 requirements

• Available with external coatings (3PE, FBE) and internal linings for corrosion protection

• Full traceability with mill test certificates and heat number identification

• Compatible with standard butt-welding, flanging, and coupling methods

5. Product Functions
The pipe serves as the primary conduit for transporting fluids under pressure across long distances and within processing facilities. The specified grade determines the minimum yield strength (e.g., X52 = 52 ksi / 359 MPa minimum yield), allowing engineers to select the appropriate grade for design pressure requirements. The seamless body ensures uniform mechanical properties around the circumference and along the length.

6. Instruction for Use

• Verify pipe grade, OD, wall thickness, and specification level (PSL1/PSL2) against the approved design before installation .

• Inspect pipe body and ends for dents, gouges, corrosion, or bevel damage upon receipt.

• Handle pipe with suitable lifting equipment; do not drop or drag. Protect beveled ends and coatings .

• Clean pipe ends and internal bore before alignment.

• Align pipe sections carefully; do not force alignment with excessive external loads.

• For welding, follow a qualified WPS with preheat and interpass temperature controls appropriate to the grade and wall thickness.

• Perform visual inspection, NDT, and hydrostatic testing per project requirements.

• Keep open pipe ends protected when installation is interrupted to prevent debris entry .

7. Precautions

• Do not subject pipe to impact or drop during storage and handling; damaged bevels affect joint quality.

• Store pipe on level ground with adequate drainage; avoid standing water contact.

• Keep carbon steel pipe separated from stainless steel to prevent galvanic corrosion.

• Verify mill test certificates match the delivered heat numbers before installation.

• Do not exceed specified bending limits; forced alignment introduces residual stresses.

• For sour service (H2S), confirm the pipe meets NACE MR0175 requirements; seamless pipe is generally preferred over ERW in sour environments .

• Ensure pipeline is depressurized and drained before any maintenance or repair.

8. Shipping Information

• Standard export packing: in bundles secured with steel strips, or loose for larger diameters .

• Container loading: 20ft container accommodates lengths up to 5.8m; 40ft container accommodates lengths up to 11.8m .

• Dispatch: 7–10 working days for stock items; 15–45 days for production orders depending on quantity and specification .

• Shipping methods: sea freight (FCL/LCL), air freight, or as arranged.

• Mill test certificates, packing list, and commercial invoice provided with shipment.

9. Payment Terms

• T/T: 30% deposit, 70% balance before shipment (or against copy of B/L).

• L/C at sight accepted for qualified orders.

• Trade terms: EXW, FOB, CFR, CIF .

• All prices quoted subject to final confirmation of specification, quantity, and delivery destination.

10. Packaging

• Small-diameter pipes bundled with steel strips; large-diameter pipes shipped loose or in wooden cradles .

• Beveled ends protected with plastic caps.

• External wrap: plastic woven cloth or waterproof film available on request.

• Desiccant added for sea shipments to minimize internal condensation.

• Custom marking, labeling, and bundle tagging available upon request.

11. Return & After-Sales Policy

• Quality claims must be submitted in writing within 7 business days of receipt, with photos, heat numbers, and inspection data .

• Products confirmed non-conforming to contract specifications due to our fault: replacement, repair, or compensation provided .

• Custom-cut or coated products are not eligible for return unless defective.

• Claims for shipping damage must be reported immediately upon receipt with carrier documentation.

• Warranty: manufacturing defects covered for 12 months from delivery.

• Technical support available for material selection, welding procedure qualification, and installation guidance.