Do you produce welded pipe in-house?

Yes, our Tianjin plant operates advanced ERW (high-frequency) welding lines with in-line weld seam inspection, so we control production, testing and packing under one roof.

Can welded pipe be supplied threaded or grooved?

Yes, threaded and coupled ends and grooved ends can be processed in our plant before packing, saving significant time for on-site installation.

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.

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.

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.

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.

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.

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.

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.

Direct Mill Supply | ASTM A53 & ASTM A500 ERW Steel Pipe

Welded Steel Pipe (ERW & LSAW) Manufacturer in China

Name: Welded Steel Pipe Manufacturer & Supplier in China
Brand: Sino East Steel
SKU: SES-9876C51C
Availability: InStock

Sino East Steel Group supplies high-frequency electric resistance welded (HFW/ERW) and longitudinally submerged arc welded (LSAW) carbon steel pipes for fluid transmission, structural columns, and municipal water mains.

✓ High-Frequency ERW & LSAW Welded

✓ ASTM A53, ASTM A500 Gr.B/C, EN 10219

✓ Hydrostatic & Weld Seam NDT Tested

✓ Precision Cut-to-Length Available

💬 WhatsApp Instant RFQ (+86 18622088833)

✉️ Request CIF Quote

Factory Inventory & Quality Inspection

Real Production, Warehouse & Seaworthy Export Packaging

ASTM A36 / A53 ERW Black Welded Steel Pipes

100% Weld Seam UT & Hydrostatic Tested

Containerized Strapped Bundles for Export

Why Procure Direct from Sino East Steel Group

💰 Direct Mill Pricing

Eliminate intermediate trading markups with transparent factory FOB/CIF pricing and flexible payment terms for volume contracts.

🛡️ Certified EN 10204 3.1 MTC

Full heat-number traceability, guaranteed mechanical/chemical tolerances, and complete third-party inspection (SGS/BV) compliance.

🚢 1x20GP Mixed Cargo Support

Consolidate various sizes, specifications, and hardware fasteners into single 25-ton container loads to minimize inventory overhead.

Manufacturing Specifications & Technical Range

Standard & Grades	ASTM A53 Gr.A/B, ASTM A500 (Gr.B/C), EN 10219 (S235JR, S355J2H), GB/T 3091
Outer Diameter	ERW: 1/2″ to 24″ (21.3mm – 610mm) \| LSAW: 16″ to 56″ (406mm – 1422mm)
Wall Thickness	1.5mm – 25.4mm \| Tolerances per ASTM / EN standards
Surface Treatment	Bare, Lightly Oiled, Black Primer Painting, 3LPE Coated
Quality Assurance	Full mill test certificate EN 10204 3.1 with chemical & mechanical data

Ready to Procure Direct from Tianjin Steel Manufacturer?

Contact our senior sales engineers with your required size, grade, and destination port. We provide official CIF quotations and MTC samples within 15 minutes.

💬 WhatsApp Direct Chat (+86 18622088833)

✉️ Request Formal Quotation Form

ERW and LSAW Welded Steel Pipe Manufacturing Facility

Our welded steel pipe lines utilize high-frequency electric resistance welding (ERW) for diameters from 1/2 inch to 24 inch, and longitudinal submerged arc welding (LSAW) for heavy-wall pipes up to 48 inch. Feedstock consists exclusively of prime hot-rolled coils and steel plates from tier-1 mills, ensuring consistent yield strength, weld ductility, and impact properties to ASTM A53, ASTM A36, and EN 10219.

Quality assurance includes 100% ultrasonic weld seam inspection, hydrostatic pressure testing up to 50 MPa, flattening tests, and bend tests per production batch. Finished pipes are supplied black bare, varnished, or hot-dip galvanized with complete MTC documentation per EN 10204 3.1.

Welded Pipe Technical Specs

Standards - ASTM A53 Grade A/B, ASTM A36, EN 10219 S235/S275/S355, API 5L Grade B to X70
Testing - In-line Eddy Current / UT weld check, hydrostatic test, X-ray inspection for LSAW
Marking - Stenciled standard, size, heat number, and Sino East mill logo every 1 meter
Loading - Containerized in 20GP/40GP or breakbulk vessel with sling lifting protection