API Line Pipe (Oil & Gas)

1. Coil Preparation: 

Uncoiling high-grade steel coils, trimming edges for precision, and cleaning surfaces to remove contaminants.

2. Forming: 

Precision roll-forming via UOE (U-ing, O-ing, Expansion) or JCOE (J-shape, C-shape, O-ing, Expansion) methods to create cylindrical pipe blanks.

3. Welding: 

Longitudinal seam welding using Submerged Arc Welding (SAW) for thick-wall pipes or High-Frequency Induction Welding (HFIW) for efficient, high-quality seams.

4. Sizing & Straightening: 

Mechanical expansion to ensure dimensional accuracy and roundness, followed by straightening to meet strict tolerances.

5. Heat Treatment: 

Normalizing, quenching, or tempering as required to enhance mechanical properties (strength, toughness) for specific grades.

6. Testing & Inspection: 

Comprehensive non-destructive testing (NDT) including hydrostatic pressure testing, ultrasonic (UT) weld inspection, radiographic (RT) testing, and magnetic particle inspection (MPI).

7. Finishing: 

Cutting to standard or custom lengths, with end beveling for easy on-site welding.

8. Packaging: 

Preparation for global shipping with protective materials.

High Pressure Resistance:

Engineered to withstand extreme pressure in oil & gas transmission, compliant with API 5L PSL1/PSL2 standards.

Superior Toughness:

Heat treatment and precise welding ensure resistance to impact and fatigue, even in low-temperature environments.

Corrosion Resistance: Compatible with anti-corrosion coatings (3PE/3LPE/FBE) to withstand coastal salt spray, desert humidity, and sour service (NACE MR0175 compliant).

Dimensional Precision:

UOE/JCOE forming and mechanical expansion guarantee consistent roundness and straightness for seamless installation.

Climate Adaptability:

Performs reliably in desert heat (up to 55°C), low temperatures (-45°C for A333 grades), and tropical humidity.

Sour Service Compatibility:

Grades meeting NACE MR0175/ISO 15156 standards for safe transport of hydrogen sulfide (H₂S)-containing hydrocarbons.

Our API Line Pipe complies with international and regional standards for global project approval:

• Primary Standards: API Specification 5L (PSL1/PSL2), API 5CT
• Supplementary Standards: ASTM A106, ASTM A53, ASTM A333, NACE MR0175/ISO 15156
• Quality & Management Certifications: API Monogram License, API Q1, ISO 9001, ISO 14001, ISO 45001
• Regional Standards: DNV GL, CSA Z245.1, GOST, EN 10208
• All orders include material test certificates (MTC), NDT reports, and compliance documents for customs clearance.

Packaging

• Pipes are bundled with high-strength galvanized steel straps to prevent deformation during transit.
• Wrapped in moisture-proof film and anti-corrosion paper to protect against humidity (Southeast Asia/Africa) and dust (Middle East).
• Coated pipes (3PE/3LPE) are wrapped with protective sleeves to avoid coating damage.
• Placed on ISPM 15-certified wooden pallets for international shipping compliance.
• Clear English labeling includes product name, grade, OD/WT/length, batch number, and handling instructions.

Shipping

• Lead Time: Standard orders (≤300 tons): 18-28 working days; Bulk orders (＞300 tons): 28-40 working days; Custom grades/lengths: 25-35 working days.
• Logistics Partners: Maersk, CMA CGM, Aramex, and regional carriers for inland delivery to pipeline construction sites.
• Delivery Coverage: Port-to-port, door-to-door for major cities, and tailored solutions for remote offshore/onshore project locations.
• Global Reach: Supply to all regions except Europe and the US, with optimized shipping routes for each market.

RFQ Question: Do your API 5L X65 pipes resist coastal salt spray for offshore use?

Answer: Yes, our API 5L X65 line pipes come with 3PE anti-corrosion coating, resisting coastal salt spray.

RFQ Question: Need low-temperature line pipes for gas gathering lines—can they withstand freezing conditions?

Answer: We recommend ASTM A333 Gr. 6/API 5L X52 pipes, designed for low temperatures (-45°C).

RFQ Question: Can you supply API 5L X70 pipes for high-pressure onshore pipelines? Delivery in 30 days possible?

Answer: Yes, our API 5L X70 line pipes (PSL2) are rated for high-pressure onshore transmission. They undergo strict UT/RT testing, and 30-day delivery is guaranteed for standard orders with full MTC.

RFQ Question: What’s the warranty for sour service line pipes?

Answer: Our NACE MR0175-compliant API 5L X52 pipes come with a 5-year warranty against manufacturing defects.

RFQ Question: Are your pipes compatible with 3PE coating for desert pipeline projects? Are they easy to weld?

Answer: Yes, our pipes are prepped for 3PE coating to resist desert humidity and sand erosion. They feature beveled ends for easy on-site welding, delivering in 22-30 working days.

RFQ Question: Can your API 5L Gr. B pipes handle refinery process piping heat?

Answer: Our API 5L Gr. B/ASTM A106 pipes withstand high temperatures in refinery process systems. They meet API 5L PSL1 standards, with hydrostatic test reports included.