Quick answer: ASTM A36 Carbon Steel Welded Pipe — Welded Steel Pipe manufactured by Sino East Steel and shipped directly from the mill. Standards: ASTM / EN / API. Certification: EN 10204 3.1 (MTC) on every delivery. MOQ 10-20 tons, delivery to Poland and the EU in 15-25 days. Request your quotation by form, WhatsApp or e-mail — reply within 24 hours.
ASTM A36 Carbon Steel Welded Pipe
ASTM A36 Carbon Steel Welded Pipe — a factory-direct product from Sino East Steel, one of China’s certified steel manufacturers serving Polish importers, distributors and contractors since 2005. This product is supplied to ASTM A36 specifications, with EN 10204 3.1 mill test certificates, and is packed for sea freight to Gdansk, Gdynia, Szczecin and other Baltic and Northern European ports. Every order benefits from direct mill pricing, documented quality control and a professional export team that manages documentation, packing and shipping from one source.
This page provides the full technical picture of ASTM A36 Carbon Steel Welded Pipe — available specifications, manufacturing background, typical applications, quality assurance, packaging and ordering process — so your procurement team can evaluate the product without chasing data across multiple suppliers. For an exact quotation matching your required sizes and quantities, contact our export office; a confirmed price and delivery schedule are normally provided within 24 hours.
Key Specifications at a Glance
| Parameter | Value |
|---|---|
| Standard | ASTM / EN / API |
| Certification | EN 10204 3.1 MTC |
| Minimum Order Quantity (MOQ) | 10-20 tons |
| Lead Time | 15-25 days |
| Payment Terms | T/T, L/C |
| Export Packing | Seaworthy export packing |
Available Sizes & Range
| Item | Range | Notes |
|---|---|---|
| ERW | 21.3 – 660 mm | WT 2 – 20 mm |
| LSAW | 406 – 2,500 mm | WT 6 – 40 mm |
| Length | 5.8 – 12.2 m | random or fixed |
Standards, Grades & Equivalents
| Standard | Grade | Typical Use |
|---|---|---|
| ASTM A53 | A, B | Welded and seamless, black or galvanized |
| ASTM A252 | Grade 1 – 3 | Welded and seamless steel pipe piles |
| API 5L | B – X70 | Welded line pipe |
| EN 10217 | P235TR1 – P355GH | Welded steel tubes for pressure |
| EN 10219 | S235JR – S355J2H | Cold-formed welded hollow sections |
| GB/T 3091 | Q195 – Q355 | Welded steel pipe for low-pressure fluid |
Typical Mechanical Properties by Grade
| Grade | Yield Strength | Tensile Strength | Typical Use |
|---|---|---|---|
| A53 Gr.B | 240 MPa | 415 MPa | General service |
| A252 Gr.2 | 240 MPa | 345 MPa | Piling |
| S355J2H | 355 MPa | 470-630 MPa | Structural |
| Q355B | 355 MPa | 470-630 MPa | Economical HSLA |
ERW & LSAW Welded Steel Pipe — Cost-Efficient and Reliable
Welded steel pipe offers the economy of coil- or plate-based production with the strength needed for the majority of industrial, structural and fluid-handling applications. The two main production routes are ERW (electric resistance welding), formed from hot-rolled coil and welded by high-frequency current, and LSAW (longitudinal submerged arc welding), formed from steel plate and welded under flux. Sino East Steel supplies welded pipe in diameters from 21.3 mm to 2,500 mm, with wall thicknesses from 2 mm to 40 mm, to ASTM A53, ASTM A252, API 5L, EN 10219, EN 10217 and GB standards. For Polish distributors and contractors, welded pipe is the most flexible product line because it can be produced in long lengths and in the exact diameters used in construction and infrastructure projects.
ERW and LSAW Production
In the ERW process, steel strip is uncoiled, roll-formed into a cylinder and welded along the seam with high-frequency induction, then sized and straightened. The weld area is normalized to restore ductility, and the pipe is tested by eddy current or ultrasonic inspection. In the LSAW process, plate edges are beveled, formed in a JCO or UOE press, and joined by double-sided submerged arc welding. LSAW pipe is preferred for large diameters and higher pressure ratings where ERW coil width would limit the size.
Applications
Welded steel pipe is used across construction, energy and industry: water and sewage mains, structural columns and trusses, piling (ASTM A252), conveyor and handling systems, fire protection sprinkler lines, fence and railing posts, agricultural machinery and general fabrication. ERW pipe in standard sizes is a staple for Polish wholesalers, while LSAW large-diameter pipe serves port structures, bridges and municipal water projects.
Which Welded Pipe Do You Need?
For diameters up to about 660 mm, ERW pipe delivers the best balance of price, availability and quality. Above 406 mm, or when the project specifies double-sided submerged arc welding, choose LSAW. For structural applications select EN 10219 S235JR to S355J2H or ASTM A500 grades; for piling specify ASTM A252; for pressure and water service EN 10217 or API 5L. Tell us the end use and we will recommend the most economical compliant specification.
Product Advantages for Cost-Sensitive Projects
Welded pipe delivers the strength-to-cost ratio that most construction and infrastructure projects need, and buying it from the mill removes the trading margin. Our ERW and LSAW lines produce long lengths that reduce the number of field welds on your pipeline or structure, and the weld seam is tested by eddy current and ultrasonic inspection on the full length. For Polish water utilities and civil contractors, we can supply the exact diameters used in municipal networks, with bevelled ends, coatings and linings arranged before shipment. Because we handle coil and plate procurement ourselves, large-diameter LSAW orders benefit from stable pricing even when steel markets move.
Quality Control & Certification
Every 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.
Inspection & Testing Before Shipment
Before 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.
Export Documentation Included
Every 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 Steel
Importing 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 EU
Products 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 Services
Beyond 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 Service
Our 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.
Storage & Handling on Site
To protect the material between delivery and installation, store it off the ground on sleepers, keep it dry and allow air circulation between layers. Galvanized products should be separated from black steel to avoid zinc staining, and painted or polished surfaces should keep their protective wrapping until installation. When lifting, use fabric slings or spreader bars for long lengths to avoid damage. Our packing lists indicate bundle weights and lifting points, and our export team can advise on safe unloading at your warehouse or construction site.
How to Order & Request a Quotation
To 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
Is ERW pipe suitable for water supply?
Yes. ERW pipe manufactured and tested to EN 10217, ASTM A53 or API 5L with a full-length weld inspection is widely used for water supply and distribution. For potable water contact, confirm the coating or lining requirement with your project engineer.
What lengths do you supply for welded pipe?
Standard lengths are 5.8 m and 12 m, with random lengths from 5.5 to 12.2 m available. For LSAW pipe we can also supply cut-to-length pieces per your fabrication drawings.
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.
