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Heavy Wall Steel Pipe

Welding heavy wall steel pipe for structural applications are suitable for: building steel structures, fencing, columns, pile foundations, mechanical supports, and lifting components.
S235JR (EN 10219) | European standard, a globally used structural welded pipe; S355JR / S355J2H (EN 10219) | low-alloy, high-strength steel for heavy-duty, high-load-bearing structural components; A500 Gr. B / Gr. C (ASTM A500) | American standard structural welded pipe; Q235B / Q355B (GB/T 3091) | Chinese national standard, offering excellent cost-performance.

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Heavy Wall Welded Structural Pipe

It is manufactured by ERW or SSAW welding process, mainly used for load-bearing structural applications instead of high-pressure fluid transportation. With thick wall, high rigidity and good bending & compression resistance. Widely used for building columns, foundation piling, equipment supports, bridge & trailer structures. Common grades: A500 Gr.B/C, S235JR, S355JR, S355J2H, Q235B, Q355B. Customers usually focus on standard, MTC, OD/WT tolerance, length, weld quality, surface finish and marking.

Product Name		Heavy Wall Steel Pipe
More materials		S235JR（EN10219），S355JR / S355J2H（EN10219），A500 Gr.B / Gr.C（ASTM A500），Q235B / Q355B（GB/T3091），API 5L Gr.B（ERW/SSAW），A53 Gr.B（ASTM A53），EN10217 P235TR2
Specification	Small and medium diameter	Outer Diameter (OD)	60.3 mm (2") – 610 mm (24")
		Wall Thickness (WT)	8 mm – 20 mm (thick-walled range)
	Large Diameter	Outer Diameter (OD)	:219.1 mm (8") – 2540 mm (up to a maximum of 3500 mm)
		Wall Thickness (WT):	8 mm – 25.4 mm
	Large Diameter + Extra-Thick Wall	Outer Diameter (OD)	406 mm – 1626 mm
		Wall Thickness (WT)	10 mm – 44.5 mm (can be produced with an extra-thick wall of up to 75 mm)
Length		6/12m（Current inventory on hand and ready for use）, Length can be customized
Surface treatment		Black Pipe，Varnish / Anti-rust Paint，Anti-rust Oil / Preservative Oil，Sand Blasting / Shot Blasting，Hot Dipped Galvanized，Painting / Coating
Delivery Condition		Hot Rolled / Hot Rolled Seamless (HR), Cold Drawn / Cold Drawn (CD), Normalized / N, Annealed / A, Quenched and Tempered / Quenched and Tempered (QT)
Standard		ASTM, AISI, JIS, GB, DIN, EN, etc.
Scope of Application		Widely used in sectors such as oil and gas transmission, structural steel for construction, pile foundation casings, bridge and transport infrastructure, engineering machinery, municipal water systems, port and offshore engineering, and thermal power towers and vessels.
Certificate		ISO, SGS, BV, etc.
Production Technology		Hot Rolling, Cold Rolling
Edge Processing		Edging, Trimming

Heavy wall welded structural pipe is load-bearing pipe made by ERW/SSAW process with good bending & compression resistance. Widely used for steel columns, piling, equipment supports and other engineering projects. Main grades: A500Gr.B/C, S235JR, S355J2H, Q235B, Q355B. Customers focus on MTC, dimensional tolerance, weld quality, surface condition and marking.

Application

6Steel structure construction: factory columns, support frames, overpass supports

Piling works: pile pipe, foundation casing

Construction machinery: equipment base, frame, lifting supports

Transportation works: bridge supports, trailer chassis, heavy guardrail posts

Others: tower frame, heavy scaffold supports, large fence posts

1. Applicable standard, Mill Test Certificate(MTC); SGS third-party inspection upon request

2. Dimensions: OD, WT, fixed length; wall thickness minus tolerance is critical

3. Pipe end: PE Plain End / BE Beveled End (Plain End is common for structural pipe)

4. Weld quality: no crack or blowhole on surface; UT ultrasonic test if required. **Hydrostatic test is normally not required for structural pipe.

5. Surface finish: bare black pipe, anti-rust oil, hot-dip galvanized, painted coating

6. Marking, packing, MOQ, weight settlement, delivery time and trade terms

Payment Methods

Flexible payment terms available: T/T and L/C. For new clients, 30% advance payment for production, balance against copy of B/L. L/C is acceptable for large & regular orders to secure both parties.

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Warehousing Management

Before each batch of steel leaves the factory, a complete process inspection is strictly carried out. From chemical composition, mechanical properties to dimensional tolerance and surface quality, each item is carefully checked to ensure compliance with national standards and export regulations. At the same time, the quantity, packaging and rust prevention treatment are also verified. An original factory warranty certificate is attached, guaranteeing the quality. Before shipment, inspection photos are provided. Any non-compliant items will not be released, and the quality is fully controllable throughout the process. This ensures your overseas purchasing is safe and worry-free.

All items are visually inspected before delivery. No cracks, deformation, rust, scratches or cutting marks are allowed; edges must be smooth. Only visually sound products will be shipped.

Thickness, width, length, wall thickness, outer diameter have been measured. Straightness, curvature, torsion, diagonal tolerance all meet the corresponding tolerance requirements.

Quality inspection includes: mechanical property tests (yield strength, tensile strength), elongation rate, impact energy, hardness testing, chemical composition testing, process performance testing, etc.

Inspection according to packaging requirements: secure binding, moisture-proof film, rust-proof paper, export fumigation/fumigation-free wooden crates, shipping marks, gross weight, net weight, etc.

We will provide full reception services to support the customers' on-site inspection of the goods.

Hot Rolling Production Line

Cold rolling precision processing

Cold drawing/cold rolling line

Hot Rolling Production Line

Hot rolling production line (producing hot-rolled coils/medium-thick plates, thickness 2–60mm)

Cold rolling precision processing

(Producing ultra-thin / high-precision / shiny panels, with thickness ranging from 0.1 to 3mm, for high-end products)
Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Warehousing Management

A ten-thousand-ton standardized warehouse with grid-based zoning and system positioning enables rapid material retrieval and reduces the time spent searching for materials.

Inbound inspection: Verify the physical items against the inbound form, inspect the appearance, dimensions, and labels. Once confirmed to be correct, the materials are entered into the ERP system and processed for storage.

Logistics and Global Delivery: Self-operated fleet + contracted logistics partners; expedited service available for urgent orders.

International Shipping: Supports FOB, CIF, DDP, and other trade terms, covering 100+ countries and regions.

Process: Booking → Trucking → Customs Declaration → Loading onto Ship/Aircraft → Bill of Lading Issuance → Document Delivery → Destination Port Customs Clearance (Optional) → Last-Mile Delivery.

Provides door-to-door one-stop logistics with full tracking to ensure safe and timely arrival of goods.

After-Sales Service and Traceability: Delivery receipts, logistics information, and quality inspection documents are sent to customers within 24 hours of shipment.

Established a full product lifecycle traceability system, allowing tracking of production, quality inspection, warehousing, and transportation records.

Follow-up inspection within 72 hours of arrival; rapid response and handling of quality issues; assistance in resolving customs clearance issues for foreign trade orders.

Packaging Method