API 5L Line Pipe

If you are looking for a reliable API 5L line pipe supplier for Poland, a certified factory that manufactures line pipe to API 5L PSL1 and PSL2, or a manufacturer that can deliver large-diameter pipe for gas and oil projects, Sino East Steel is a direct mill partner to consider. As an API 5L pipe manufacturer with 18+ years of export experience, we supply seamless, ERW and LSAW line pipe in grades B, X42, X46, X52, X56, X60, X65 and X70 to Polish energy contractors, gas utilities, pipeline distributors and engineering companies. Buying line pipe directly from our factory means mill pricing, complete EN 10204 3.1 documentation and a production schedule controlled by the people who make the pipe — not by a trading intermediary.
API 5L Line Pipe for Gas, Oil and Water TransmissionAPI 5L line pipe is the backbone of modern energy and utility infrastructure — the welded or seamless steel pipe used to transport oil, natural gas, water and other fluids over long distances, often under high pressure and in demanding environments. At Sino East Steel we manufacture and export API 5L line pipe in grades B, X42, X46, X52, X56, X60, X65 and X70, in both PSL1 and PSL2 specifications, with diameters from 21.3 mm up to 1,220 mm. The product range covers seamless, ERW (electric resistance welded) and LSAW (longitudinal submerged arc welded) processes, so buyers in Poland and the EU can match the production route to their pressure class, wall thickness and project budget.
How API 5L Pipe Is ManufacturedSeamless line pipe is produced from round billets that are heated and pierced into hollow shells, then rolled and sized to the required outside diameter. ERW pipe is formed from hot-rolled coil on a continuous forming mill and welded by high-frequency electric current, followed by heat treatment of the weld area. LSAW pipe is formed from steel plate and welded by submerged arc welding on both the inside and outside surfaces. Each route ends with non-destructive testing — ultrasonic, eddy current or hydrostatic testing — to verify the integrity of the pipe body and the weld seam before release.
ApplicationsIn Poland and across Europe, API 5L pipe is used in cross-country gas and oil transmission lines, district heating and cooling networks, water mains, industrial process piping and offshore platforms. It is also widely specified for compressor stations, storage terminals and municipal utilities where long service life under pressure is critical. For energy contractors and utility companies, buying line pipe directly from the mill simplifies traceability and keeps large-project budgets under control.
How to Select the Right API 5L GradeChoose the grade according to the design pressure and operating temperature of your line: Grade B suits general service and water lines, X42–X52 covers most mid-pressure gas distribution, and X60–X70 is specified for high-pressure transmission. PSL1 covers standard service with minimum mechanical requirements, while PSL2 adds tighter limits on carbon equivalent, notch toughness and maximum yield strength. If your project follows EN 1594, DIN 2470 or Polish gas utility norms, tell us the applicable code and we will confirm the equivalent API 5L specification.
Standards, Grades & Equivalents

StandardGradeTypical Use
API 5L PSL1 / PSL2B, X42, X46, X52, X56, X60, X65, X70Line pipe for gas, oil, waterASTM A53A, BWelded and seamless black and galvanizedASTM A106A, B, CSeamless carbon steel for high-temperature serviceISO 3183L245 – L555International equivalent of API 5L
Available Sizes & Range

ItemRangeNotes
Seamless21.3 – 406.4 mmSCH10 – SCH160ERW114.3 – 660 mmWT 3.2 – 20 mmLSAW406 – 1,220 mmWT 6 – 40 mmLength5.8 – 12.2 mrandom or fixed
Specification Deep-Dive for API 5L Line PipeAPI 5L line pipe is delivered with a defined set of mechanical properties that control how the line behaves under pressure. For Grade B the minimum yield strength is 245 MPa, rising to 360 MPa for X52, 415 MPa for X60, 450 MPa for X65 and 485 MPa for X70, with matching minimum tensile strengths stated in the mill certificate. PSL2 adds a maximum yield strength limit and tighter carbon equivalent (CEV), which improves weldability on site — an important factor for Polish pipeline contractors who weld in field conditions. Wall thickness tolerance, ovality and end squareness follow API 5L dimensional requirements, and every joint is marked with the heat number, grade and specification for full traceability from our factory to your trench. For buried lines we apply 3PE or FBE coating at our finishing lines, with coating thickness checked by holiday detection before packing. Hydrostatic testing is performed on every pipe at a pressure calculated from the grade and wall thickness, and the results are recorded in the batch certificate. If your project is governed by the EU Gas Directive or Polish gas utility technical conditions, send us the applicable code and our engineers will confirm the correct PSL level, testing category and documentation list.
Ordering API 5L Line Pipe for Polish ProjectsPolish gas utilities and pipeline contractors usually order line pipe against a specific project code. Send us the standard (API 5L PSL1/PSL2, ISO 3183 or EN 1594), grade, diameter, wall thickness, length and quantity, and our export engineers will confirm availability, coating options (3PE, FBE, bare) and a production schedule within 24 hours. For PSL2 and sour-service grades we can arrange impact testing and third-party inspection before loading.
Quality Control & CertificationEvery batch of material delivered from our Tianjin plant passes through a documented inspection routine: chemical composition analysis, tensile and yield testing, dimensional checks and, where applicable, hydrostatic or flattening tests. Each consignment ships with an EN 10204 3.1 mill test certificate (MTC) and batch traceability records, so your incoming inspection at Gdansk, Gdynia, Szczecin or any other EU port is straightforward. The factory operates under an ISO 9001:2015 quality management system and is independently audited by SGS and TUV Rheinland for production capacity and export reliability.
Export Documentation IncludedEvery order is shipped with a complete documentation set: commercial invoice, packing list, bill of lading, certificate of origin, and the EN 10204 3.1 mill test certificate with heat numbers and test results. Where your project requires third-party inspection, we can arrange SGS, TUV or Bureau Veritas inspection before loading, with the inspection report issued in English for easy clearance in the EU.
Why European Buyers Source This Product from Sino East SteelImporting steel from China to Poland is a routine, well-understood process when you work with a manufacturer that has done it hundreds of times. Sino East Steel combines factory-direct pricing with export experience across the EU, so you avoid the margin stack of trading companies and the documentation delays that slow down first-time imports. Our export team prepares commercial invoices, packing lists, certificates of origin, and the EN 10204 3.1 mill certificates your quality department and customs broker expect. We also coordinate vessel booking from Tianjin/Xingang to Baltic ports, and for regular customers we can hold production slots so repeat orders keep your warehouse stocked without interruption.Because we are the manufacturer, specification changes, coating requirements, packing instructions and delivery dates are agreed directly with the people who control the production line. This transparency is what distributors and contractors in Poland value most: one accountable partner, one set of documents, and material that matches the sample on every shipment.
Packaging & Delivery to Poland and the EUProducts are packed in seaworthy export condition: steel strapping, waterproof wrapping, and wooden or steel pallets where required, with clear marking for safe handling. For pipe and tube orders we use the standard export bundle format with plastic end caps on request. Sea freight to Polish and Baltic ports (Gdansk, Gdynia, Szczecin, Klaipeda) is arranged from Tianjin or Xingang port, with typical lead times of 15–25 days after production. FCL and LCL options are both available, and mixed-container consolidation is offered for regular customers who combine several product lines in one delivery.
Customization & Value-Added ServicesBeyond standard supply, our finishing lines can prepare material for your exact production step: cutting to length, drilling, bevelling, threading, coating, marking and custom bundling per your drawings. Packaging can be adapted to your handling equipment — pallets, frames, slings or individual protective wrapping — and private labeling is available for distributors who resell under their own brand. For customers with regular monthly programs, we schedule production slots so that reorder quantities arrive on time, allowing you to run leaner stock without risking supply gaps on your own production line.
Technical Support & After-Sales ServiceOur export engineers support you from specification to installation: confirming grade and size selections, advising on coatings and packing for your climate and handling equipment, and answering technical questions from your quality department. After delivery, we keep the batch records on file and can issue additional documentation, arrange replacement paperwork, or support you in the rare case of a claim. For Polish customers this means a single point of contact who knows your orders, your specifications and your delivery history — service that trading intermediaries rarely match.
Inspection & Testing Before ShipmentBefore any material leaves the plant it passes through a defined inspection gate. Dimensional checks are performed against the ordered specification, surface quality is inspected visually and with instruments where required, and the relevant mechanical and chemical tests are verified against the mill certificate. For pipe and tube products, hydrostatic and non-destructive testing results are reviewed against the standard’s acceptance criteria. Customers who request it can witness the inspection or receive photographs and video of the loaded goods before the vessel sails — a practical way to build confidence without travelling to China.
How to Order & Request a QuotationTo receive a firm quotation, please send your required specification: grade and standard, dimensions, quantities (in tons or pieces), end use, and the destination port in Poland or the EU. Our export team replies within 24 hours with pricing, availability and a proposed shipping schedule. We work with T/T and L/C payment terms, and for established EU customers longer payment arrangements can be discussed on a project basis.Request a quote: use the contact form, WhatsApp +86-186-2208-8833, or email [email protected].
Frequently Asked Questions
What is the difference between PSL1 and PSL2 API 5L pipe?PSL1 is the base specification for line pipe with minimum yield and tensile requirements. PSL2 adds stricter chemical composition limits, controlled carbon equivalent, optional impact testing (CVN) and a maximum yield strength cap, which is often required for sour service or high-pressure transmission lines in the EU.
Do you provide hydrostatic test certificates for API 5L pipe?Yes. Every production batch is hydrostatically tested per API 5L requirements, and the test pressure and results are stated in the mill test certificate that accompanies the shipment.
Can you supply API 5L pipe for Polish gas utility projects?Yes. We regularly supply API 5L PSL1 and PSL2 line pipe to gas distribution and transmission projects in the EU. Send your project specification and we will confirm the equivalent API 5L grade, testing level and documentation required by your utility.
What coatings are available for buried line pipe?3PE (three-layer polyethylene), FBE (fusion bonded epoxy) and coal tar enamel coatings are available for buried service. Coating type and thickness follow your project specification, and coating certificates are included with the shipment.
What documents do you provide with each shipment?Each shipment includes the EN 10204 3.1 mill test certificate, packing list, commercial invoice and bill of lading. Inspection reports and third-party certificates (SGS, TUV, Bureau Veritas) can be arranged before loading if your project requires them.
Can you supply to Polish and European standards?Yes. We regularly export to EN and DIN specifications used across the EU, including EN 10219, EN 39, EN 10210, EN 10305 and DIN 2440, in addition to ASTM and API standards. Tell us the standard your project specifies and we will quote accordingly.
What are your MOQ and lead times?MOQ depends on the product and size — typically from 1 to 10 tons for standard lines. Production and shipping to Polish ports normally takes 15–25 days from order confirmation.
Do you ship to Polish ports and handle customs paperwork?Yes. We ship FOB Tianjin/Xingang, CIF or CFR to Gdansk, Gdynia, Szczecin and other Baltic ports, and we prepare the export documentation (commercial invoice, packing list, bill of lading, certificate of origin, mill certificates) needed for import clearance in Poland.
Can we arrange a pre-shipment inspection?Yes. Third-party inspection by SGS, TUV, Bureau Veritas or your own representative can be arranged before loading, and the inspection report is provided before the vessel departs.
Do you offer samples before a full order?For most products we can provide small samples or cut pieces so your quality department can verify the material. Sample cost is credited against the first order for regular customers.
About Sino East Steel — Sino East Steel is a factory-direct manufacturer and exporter of carbon steel, galvanized steel and structural steel products, operating from a 65,000 m² production base in Tianjin, China. Since 2005 the company has built a steady export record across Europe, the Middle East and the Americas, supplying distributors, contractors and engineering companies that require consistent quality, complete documentation and dependable delivery. For Polish buyers, this means a single certified source for pipes, coils, sheets, bars and structures, with every shipment supported by mill test certificates and traceable batch records.
Sourcing This Product from China to Poland — What to ExpectImporting steel from China to Poland is a standard, well-documented process when the manufacturer manages it end to end. After you confirm the specification, we issue a proforma invoice with price, production time and shipping terms (FOB Tianjin/Xingang, CIF or CFR to Gdansk, Gdynia, Szczecin or Klaipeda), produce and inspect the material, prepare the full export documentation set, and book the vessel. Total lead time from order confirmation to arrival at a Polish port is typically 15–25 days for standard products. Polish importers pay import VAT and customs duties at the EU border using the commercial invoice, packing list and certificate of origin we provide; the EN 10204 3.1 mill certificates satisfy your quality department and any project documentation requirements. For first orders we recommend a trial container with the most popular sizes, so you can verify material, documents and delivery performance before committing to a larger supply program.