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Gas Transport Pipeline Solutions for Global Energy Transmission Projects

Gas transport pipelines serve as core transmission infrastructure for moving natural gas, wet gas, dry gas, sour gas, and hydrogen blend gases across cross-country networks, offshore systems, and processing connections.

Industrial Park Piped Gas Supply System
Xinxiang Jiale Intelligent Equipment Co., Ltd. engineers and builds skid-mounted industrial gas regulation, filtration, and metering systems. From our 69,000-square-meter facility established in...

Typical Applications

Natural Gas Transmission Line Pipe

Supplied for cross-country and regional gas transmission mainlines requiring high toughness and precise dimensional stability.

Sour Service Line Pipe

Formulated for wet, H₂S-containing natural gas transport requiring Resistance to Hydrogen-Induced Cracking (HIC) and Sulfide Stress Cracking (SSC).

Offshore Gas Transmission Systems

Manufactured with strict ovality, wall thickness, and straightness controls for subsea gas gathering lines and platform risers.

Hydrogen-Ready & CO₂ Pipelines

Pipe for hydrogen blend and dense-phase CO₂ service is supplied per project specification, with material qualification, fracture toughness, and crack-arrest testing agreed with the pipeline designer before order.

Material Selection

Service Condition	Key Technical Requirements	Standard / Material Focus
Sweet Gas Service	Standard corrosion allowance, verified pressure rating	API 5L PSL1 / PSL2
Sour Gas Service (H₂S)	HIC and SSC resistance, calcium treatment, low S and P	API 5L PSL2 Annex H; NACE MR0175 / ISO 15156
Low Temperature Service	Charpy V-notch verified down to −46°C	API 5L PSL2, fine-grain micro-alloyed steel
High MAOP Mainlines	High yield strength to reduce wall thickness	API 5L PSL2, micro-alloyed

Anti-Corrosion Coating Options

External 3LPE Coating

Three-layer polyethylene coating for buried natural gas pipelines operating at temperatures up to +70°C (DIN 30670 / ISO 21809-1).
External 3LPP Coating

Three-layer polypropylene coating for high-temperature service up to +110°C and heavy mechanical stress installations.
Fusion Bonded Epoxy (FBE)

Single or dual-layer FBE for standard corrosion protection and horizontal directional drilling (HDD) crossings.
Internal Epoxy Flow Coating

Smooth internal lining to reduce wall surface friction, lower pressure drops, and increase gas throughput (API RP 5L2).

Global Export

Pipe End Protection

Heavy-duty bevel protectors and end caps attached to prevent end-bevel damage during transit.

Packaging & Shipping Options

Hexagonal bundling for small diameter pipe, loose stowing for large-diameter SAWL/SAWH pipe, and padded container loading for coated pipe.

Project Qualification

Primary Product Standards

API 5L (PSL1/PSL2) and ISO 3183.

Pipeline Design Standards

Fully compatible with ASME B31.8 (Gas Transmission and Distribution Piping Systems) and DNV-ST-F101 (Subsea Pipeline Systems).

Supplier Qualification Support

Complete technical submittal packages available for EPC contractor and operator audits, including Manufacturing Procedure Specifications (MPS), Inspection and Test Plans (ITP), and mill qualification histories.

Third-Party Audit Readiness

Facilities operate under API Q1 and ISO 9001-certified quality management systems, supporting customer factory audits and third-party inspection agencies.

Factory Testing

Per heat / per lot: Chemical analysis, tensile test, Charpy V-notch impact test, and hardness test, at the frequency required by API 5L. DWTT is performed per order for PSL2 pipe where specified.

Sour service pipe: HIC test per NACE TM0284 and SSC test per NACE TM0177, taken per heat, with results shown in the mill test certificate.

Weld seam: Radiographic testing of weld ends and 100% UT or radiographic inspection of the seam, per the agreed ITP.

Documents: Mill test certificates per EN 10204 3.1 or 3.2, with third-party witnessing arranged under the ITP.

Manufacturing Capability

01.

Production Line Setup

Equipped with 2 SAWL JCOE lines, 2 high-frequency ERW/HFW lines, and 1 SAWH spiral welding line.

02.

Pipe Body Expansion

Full-length mechanical expansion on SAWL pipe ensures dimensional roundness, straightness, and stress relief.

03.

Annual Output Capacity

Combined annual line pipe production capacity of 250,000 metric tons.

04.

In-Line Tracking

Automated heat-number marking systems ensure heat-to-pipe material traceability throughout the manufacturing process.

RFQ Requirements

To receive an accurate commercial and technical proposal, please include:
Pipe size: Outside diameter (OD) and wall thickness (WT)
Process: Seamless, HFW/ERW, SAWL, or SAWH
Grade and level: API 5L grade and PSL level (e.g., X65 PSL2)
Service: Sweet or sour (NACE), operating temperature, MAOP, and test pressure
Length: Single random, double random, or fixed length, with tolerance
Pipe ends: Plain end, bevel angle (typically 30° +5/−0°), root face, or special end
Coating: External (3LPE, 3LPP, FBE) and internal (flow coating), with cutback length
Marking: API monogram requirement, paint marking, and stenciling
Documents: MTC type (EN 10204 3.1 or 3.2), third-party inspection (TPI) agency, and ITP
Quantity and delivery: Total length or tonnage, destination port, and delivery schedule

FAQ

Q: Do you hold an API 5L Monogram license?

A: Yes. We hold API Spec 5L license no. 5L-7842 and API Spec Q1 certificate no. Q1-3916, covering SAWL, HFW, and SAWH pipe up to X70 grade. Both can be verified on the API Composite List.

Q: Where is the pipe manufactured?

A: The pipe is manufactured at our Xinxiang Jiale Pipe Plant in Xinxiang, China. Audits are available to buyers, EPC contractors, and third-party agencies with 2–4 weeks’ notice.

Q: What diameter, wall thickness, and length ranges can you supply?

A: SAWL pipe covers OD 406–1,422 mm with wall thicknesses up to 40 mm. HFW covers OD 114–610 mm, and SAWH covers OD 406–2,540 mm. Standard length is 12 m.

Q: How is coated pipe protected during ocean shipping?

A: Coated pipe is placed on timber supports with rubber or foam separators. Stack height is limited to 3–4 layers to prevent coating damage.

Q: What is the minimum order quantity and lead time?

A: The typical MOQ is 500–1,000 metric tonnes per size and grade. Standard-grade pipe ships within 60–90 days after plate or coil confirmation. Sour-service, X80, and thick-wall pipe typically require 90–150 days.

Q: What happens if a pipe fails testing?

A: Pipes that fail hydrotesting or NDT are repaired within API 5L limits and retested. Pipes that cannot be repaired are scrapped, marked, and segregated.

Q: Which pipeline projects have you supplied?

A: We have supplied approximately 680 km of line pipe to operators and EPC contractors in Southeast Asia, the Middle East, Africa, and South America. Project references and mill audits are available on request.

As one of the most professional gas transport pipelines manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy durable gas transport pipelines for sale here from our factory. We also accept customized orders.

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