API 5L Line Pipe Manufacturer & Supplier in China

API 5L Line Pipe Manufacturer & Supplier in China

Sino East Steel Group supplies API 5L line pipe for oil, gas and water transmission projects, manufactured in our Tianjin plant under API 5L PSL1 and PSL2 requirements. For EPC contractors and pipeline operators in the GCC, we deliver seamless and welded line pipe with full traceability, third-party inspection and project-scale scheduling.

Every shipment is manufactured to API 5L (46th edition), PSL 1 and PSL 2, tested in our ISO 9001:2015 certified quality system, and delivered with a complete documentation set including the Mill Test Certificate (MTC) per EN 10204 3.1, commercial invoice, packing list, bill of lading and certificate of origin. Third-party inspection by SGS, BV or TUV can be arranged at the factory or the destination port.

Because we are the line pipe manufacturer rather than a trader, API 5L orders are produced, tested and certified on our own ERW and LSAW lines, with the pipe specification locked in writing before rolling. Every heat is sampled and every pipe hydrostatically tested, so the pricing, delivery schedule and quality accountability all sit with one party: the factory that issued the MTC.

Why Buy API 5L Line Pipe Direct from a Chinese Factory

Importers and distributors who source api 5l line pipe directly from our factory in Tianjin benefit from the complete manufacturing chain under one roof: steel input selection, forming and production, surface treatment, quality testing, packing and export documentation. This integrated model removes trading markups and ensures that the specification approved in the quotation is the specification delivered.

• API 5L PSL1/PSL2 pipe produced on dedicated ERW and LSAW lines, not re-traded stock
• MTC per EN 10204 3.1 with heat numbers on every single pipe or bundle
• PSL2 impact testing at specified temperatures and H2S-capable chemistry on request
• 3PE, FBE or bare ends prepared to the project coating specification
• Flexible terms: T/T, L/C, D/A, D/P and O/A for long-term partners
• 18-25 days sea freight to Jebel Ali, Dammam, Jeddah, Hamad Port, Shuwaikh, Sohar

Range and Specifications of Our API 5L Line Pipe

Line pipe programs are structured around the pipeline schedule rather than a generic order book: batch releases aligned to welding progress, quarterly call-offs for contractor supply agreements, and spot lots for maintenance stock. Our export engineers hold the project specification from kick-off - grade, PSL, end preparation, coating and inspection level - so every release matches the approved documentation.

Standard	API 5L (46th edition), PSL 1 and PSL 2
Available Grades	Grade A, Grade B, X42, X46, X52, X56, X60, X65, X70
Size Range	outside diameter 1/2 inch to 48 inches, wall 2.0-25.4 mm, length 6 m / 12 m / random
Surface / Finish	black, varnished or 3PE / FBE coated
Certification	ISO 9001:2015, MTC per EN 10204 3.1, SGS / BV / TUV inspection available
Packaging	Seaworthy export packing, bundled or palletized per product
MOQ	20-25 metric tons per container, mixed sizes welcomed
Production Time	15-25 days after specification confirmation
Payment	T/T, L/C, D/A, D/P, O/A

Our line pipe is produced and tested to the governing API 5L specification, with heat number traceability from steel input to final hydrostatic testing. For sour service and offshore applications we can arrange additional testing per project requirements, and each shipment carries the MTC per EN 10204 3.1 with chemical and mechanical values for every heat.

Every API 5L shipment is tracked from the coil certificate to the destination port, and the export team prepares the documents pipeline contractors expect: bill of lading, certificate of origin, MTC and, where applicable, SASO / SABER conformity for Saudi Arabia or Dubai Municipality / ESMA support for the UAE.

How to Choose a Reliable API 5L Line Pipe Supplier in China

When qualifying an API 5L line pipe supplier, verify that the mill can provide PSL2-grade documentation, hydrostatic test records and full traceability for every heat, and confirm whether third-party inspection by SGS, BV or TUV is accepted at the mill. These checks matter more than price alone on pipeline projects where a single failed joint can halt the spread.

• Confirm the mill - we open our ERW and LSAW lines to client audits
• Request MTCs from recent API 5L shipments, PSL1 and PSL2
• Verify the grade and PSL for every diameter in your project
• Agree on end preparation, coating and marking in writing
• Start with one heat or one project lot before scaling the program

This five-point checklist has helped distributors and contractors across the GCC, Africa and Southeast Asia select the right api 5l line pipe partner on their first attempt, avoiding the quality and documentation problems that are common when sourcing through intermediaries.

Global API 5L Line Pipe Supply and Gulf Export Coverage

Across the Middle East, API 5L line pipe is specified for crude oil gathering lines, natural gas distribution networks, refinery interconnections and cross-country water transmission. Our export program to Jebel Ali, Dammam and Sohar regularly combines line pipe with fittings and flanges, so contractors receive matched material for an entire pipeline spread from one accountable supplier.

Sino East Steel operates dedicated production lines for api 5l line pipe within a 65,000 m2 plant in Daqiuzhuang Industrial Park, Jinghai District, Tianjin. The annual capacity of 500,000 metric tons across all product lines allows the factory to serve distributors, contractors and project companies with stable supply for both container shipments and project-scale tonnages.

Our principal export markets are the Middle East and GCC countries, including the United Arab Emirates, Saudi Arabia, Qatar, Kuwait, Oman and Bahrain, where api 5l line pipe is used in construction, infrastructure, energy and industrial projects. We also export to Africa, Southeast Asia, Central Asia and Latin America, supported by shipping programs to the main ports in each region.

Monthly API 5L export programs to the Middle East cover the diameters Gulf pipeline projects consume: 1/2 inch to 24 inch ERW and up to 48 inch LSAW, in PSL1 and PSL2 from Grade B to X70. Repeat buyers get priority scheduling on the line, stable unit pricing and consolidated freight to the Gulf ports, which lowers the total landed cost per metre of pipe.

• Monthly rolling production plans reserve capacity for scheduled deliveries
• Container consolidation programs combine api 5l line pipe with other product lines
• Dedicated export team with multi-market documentation experience
• Distribution agreements and exclusive-territory arrangements available

API 5L Sourcing: Mill-Level Control from Coil to Certified Pipe

For line pipe, the sourcing chain matters twice: the hot-rolled coil or plate chemistry determines whether the weld and heat-affected zone meet PSL2 requirements, so we control material selection from the same steelmaking group and verify it with the coil certificate before the pipe is formed.

• Coil and plate supply from integrated mills under long-term agreements
• ERW and LSAW capacity reserved for project and contract volumes
• Pre-shipment inspection by SGS, BV or TUV at the factory or destination port
• Heat-number traceability from coil certificate to finished pipe
• Quarterly price reviews for pipeline contractors and distributors
• Mixed-grade containers for maintenance and repair stock

API 5L Quality Control, Certification and Factory Audit

API 5L production is managed under the ISO 9001:2015 system, and the tests that matter for line pipe are applied to every heat: chemical analysis against PSL limits, tensile testing, flattening and bend tests, and for PSL2 impact testing at the specified temperature. ERW welds are 100 percent eddy-current inspected and every pipe is hydrostatically tested before the MTC is issued.

For pipeline and EPC projects, we host factory audits and witness testing by client representatives and third parties - SGS, Bureau Veritas or TUV - before loading. Documentation can be prepared to satisfy SASO / SABER conformity for Saudi Arabia and Dubai Municipality / ESMA requirements for the UAE, so pipe arrives project-ready.

Sino East Steel Group has supplied API 5L line pipe to Gulf pipeline and water transmission projects since 2008, with the pipe produced on our own lines rather than sourced from third-party mills. For buyers new to importing line pipe, we provide reference lists of recent deliveries, sample pipe sections, trial-order guidance and full inspection arrangements.

API 5L Technical Support, Samples and After-Sales Service

Our engineers review every API 5L inquiry against the governing standard and confirm the grade, PSL, diameter, wall thickness, end finish and coating in writing before production. Where the project requires H2S-capable (sour-service) chemistry or impact testing at low temperatures, we confirm the option is covered before the order is accepted.

• Written confirmation of API 5L grade, PSL, OD, WT and end preparation
• MTC per EN 10204 3.1 with heat numbers on every shipment
• Pre-production samples of end bevel, coating or marking
• After-sales support for documentation, claims and repeat programs

Export Experience: API 5L Line Pipe to 50+ Countries

Since 2008, Sino East Steel has supplied api 5l line pipe to more than 50 countries, with particular strength in the Middle East, Africa and Southeast Asia. Our export team understands the documentation, packaging and logistics requirements of each destination market: oil and gas transmission pipelines, water conveyance, petrochemical and energy projects across the GCC, Africa and Southeast Asia.

Whether you are a pipeline contractor ordering by the project, a distributor building line pipe inventory, or an EPC company procuring for a water transmission package, you get the same factory service: specification lock, production scheduling with weekly progress, pre-shipment inspection options and complete export documentation on arrival.

API 5L shipping documents are prepared for the destination customs authority and the project specification, including attested certificates of origin where required. The export team provides the arrival documentation set - invoice, packing list, bill of lading, MTC and coating certificates - before the vessel reaches the Gulf port.

API 5L Quotation, Pricing and Contract Terms

Quotations for line pipe are prepared within 24 hours and include the FOB or CIF price per metre by grade and PSL, delivery time, packing (bundled, capped or coated), documentation list and payment terms. For pipeline programs we offer tiered pricing by volume and quarterly contract rates with capacity reservation.

• FOB Tianjin, CIF, CFR or DDP delivery terms to Gulf ports
• T/T, L/C, D/A, D/P and O/A payment options
• Volume-based pricing tiers for pipeline contractors and distributors
• Long-term supply agreements with mill capacity reservation

All API 5L quotations are valid for 15 days and itemize the standard, grade, PSL, OD, WT, end preparation, coating, quantity, packing, lead time and shipping terms. Contract volumes are covered by a supply agreement that fixes the inspection level and documentation set for the whole program.

How to Order API 5L Line Pipe as an Importer

1. Send your API 5L standard, grade, PSL, OD, WT, coating and destination port
2. Receive a formal quotation with delivery time and shipping options within 24 hours
3. Confirm the specification in writing; production starts on the ERW or LSAW line after confirmation
4. Track your shipment with full export documentation until arrival at the destination port

Frequently Asked Questions about Our API 5L Line Pipe Supply

1. Can your factory supply API 5L pipe with sour-service (H2S) certification?

Yes. For sour service we supply PSL 2 material with hardness control, low sulphur content and NACE MR0175-compliant testing, with full MTC documentation and SGS / BV / TUV third-party inspection available.

2. What is your production capacity for API 5L line pipe?

Our Tianjin plant has a total annual capacity of 500,000 metric tons across all product lines, with dedicated ERW, seamless and LSAW production for API 5L pipe in diameters up to 48 inches.

3. What is your minimum order quantity?

The MOQ is typically 25 metric tons per size for most products, with mixed-size container loads of 20 or 40 feet welcomed for distributors. Sample orders for project approval can be arranged.

4. What are your payment terms?

We accept T/T, L/C, D/A, D/P and O/A for long-term partners, with payment terms confirmed in the quotation for each order.

5. What is your production and shipping lead time?

Production takes 15-25 days after confirmation of the specification, followed by 18-25 days sea freight to the main GCC ports: Jebel Ali, Dammam, Jeddah, Hamad Port, Shuwaikh and Sohar.

6. Can third-party inspection be arranged?

Yes, inspection by SGS, BV or TUV can be arranged at the factory before loading or at the destination port upon arrival, which is a common requirement for project supply.

7. Do you support OEM and customized requirements?

Yes, we support OEM orders including custom sizes, finishes, packing marks and documentation, subject to MOQ. Custom packaging and labeling to the importer’s specification are available for distributor brands.

8. How do you ensure on-time delivery?

Production capacity is reserved when the order is confirmed, production progress is reported weekly, and shipments are coordinated with freight forwarders in advance. Our on-time delivery record to the Middle East since 2008 is the basis of our long-term relationships with distributors.

9. How do I request a quotation?

Send your requirement to paul@sinoeaststeel.com or message us on WhatsApp at +86 186 2208 8833. Our sales team replies within 24 hours.

10. What PSL levels and grades do you supply for API 5L line pipe?

We supply both PSL1 and PSL2, with common grades from X42 through X70 in seamless and welded (ERW/SAWL) formats. The PSL level, grade, size and testing requirements are confirmed in writing before production.

11. Can you supply line pipe with 3PE or FBE coating?

Yes. External 3-layer PE (3PE), fusion bonded epoxy (FBE) and internal lining can be arranged through our coating partners, with coating certificates included in the documentation package.

12. Do you deliver full pipeline spreads or only bare pipe?

We coordinate complete spreads on request, including pipe, bends, fittings, flanges and gaskets, consolidated in single shipments to reduce freight and clearance effort at the destination port.

Explore Our API 5L Line Pipe Range

Browse the full api 5l line pipe product range supplied by our factory: API 5L Line Pipe category.

• API 5L Steel Pipe
• API 5L Grade B Line Pipe
• API 5L Steel Line Pipe
• API Standard Steel Pipes

From Coil to Pipeline: Inside Our API 5L Production Line

Our API 5L line pipe is produced on dedicated ERW and LSAW lines in the Tianjin plant, fed by hot-rolled coils and plates from the same steelmaking group. The production route for every pipe is documented from the coil certificate to the final hydrostatic test, which is why we can issue a full EN 10204 3.1 certificate with heat numbers on every shipment.

The ERW line forms pipe in diameters from 1/2 inch to 24 inch, with weld integrity verified by 100 percent eddy-current testing and a hydrostatic test on every single pipe. Larger diameters up to 48 inch are produced on the LSAW (submerged arc) line, with both longitudinal and spiral options available for the pipeline and water transmission projects that dominate Gulf infrastructure spending.

Testing Before It Leaves the Mill

• Hydrostatic testing - every pipe is pressure-tested to the level required by the specification, with test certificates per pipe
• Eddy current / ultrasonic testing - 100 percent weld inspection on ERW production
• Mechanical testing - yield, tensile and elongation samples from every heat, plus impact testing for PSL2 grades
• Dimensional audit - outside diameter, wall thickness, ovality and end bevel checked against the standard

Because the plant is the manufacturer rather than a trader, we can adjust production to project requirements: PSL2 chemistry, impact testing at specified temperatures, custom bevel ends, and third-party witness testing by SGS, Bureau Veritas or TUV arranged before loading at the port.