Straight Welded Steel Pipe - High-Quality Structural Carbon Steel Tubing

Kuaima Steel Co., Ltd.

Verified Custom manufacturer · 7 yrs ·

China

Customizable Rock-bottom price

$610 1-49 ton Base price

$583 50-99 ton 4.4% off

$570 ≥100 ton 6.6% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 610.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of Straight Welded Steel Pipe

Property	Parameter	Description
Product Name	Straight Welded Steel Pipe	Longitudinal seam welded carbon steel pipe
Material Grade	Q235B / Q345B / ASTM A53 Gr.B / API 5L Gr.B	Multiple international grade equivalents
Manufacturing Process	ERW / LSAW / SSAW	Electric Resistance Welded, Longitudinal Submerged Arc Welded
Standard Compliance	ASTM A53, API 5L, EN 10219, GB/T 13793	Meets major international welded pipe standards
Carbon (C)	≤0.26%	Carbon content per ASTM A53 Gr.B
Manganese (Mn)	≤1.35%	Improves strength and hardenability
Phosphorus (P)	≤0.035%	Controlled for improved ductility
Sulfur (S)	≤0.035%	Low sulfur for better weldability
Silicon (Si)	≤0.35%	Deoxidizer and strength enhancer
Tensile Strength	≥415 MPa	Minimum tensile strength per ASTM A53 Gr.B
Yield Strength	≥240 MPa	Minimum yield strength
Elongation	≥23%	Ductility in 50mm gauge length
OD Range	21.3mm - 1420mm	Available outer diameter options
Wall Thickness	1.0mm - 40mm	Standard and custom wall thickness
Length	5.8m - 12m or custom	Standard and custom cut lengths
Surface Treatment	Black, Galvanized, Anti-corrosion Coated, Oiled	Multiple surface finish options available
Application	Structural, Water Supply, Oil & Gas, Construction	Typical application industries
Certification	EN 10204 3.1, ISO 9001, API 5L	Quality certifications provided
Packaging	Bundled with steel strips, plastic caps on ends	Standard export packaging
MOQ	5 tons	Minimum order quantity

Straight Welded Steel Pipe - High-Quality Structural Carbon Steel Tubing

Straight welded steel pipe is a cost-effective and reliable tubular product manufactured by forming flat steel strip or plate into a cylindrical shape and joining the seam through high-frequency electric resistance welding (ERW) or submerged arc welding (SAW). Serving critical roles in structural frameworks, fluid transportation, and mechanical engineering, this carbon steel tubing delivers consistent dimensional accuracy and dependable mechanical performance. Whether you are sourcing for construction projects, pipeline infrastructure, or industrial fabrication, our mill-direct straight welded steel pipe meets rigorous international specifications to ensure long-term service reliability.

Straight welded steel pipe supplier

What Is Straight Welded Steel Pipe?

Straight welded steel pipe refers to steel tubing produced by longitudinally welding a single straight seam along its length, distinguishing it from spiral welded pipe. The manufacturing process involves uncoiling steel coil or plate, cold-forming it into a round or square profile, and welding the edges using ERW or LSAW (Longitudinal Submerged Arc Welding) techniques. This process yields tubing with a uniform wall thickness, smooth weld bead, and tight dimensional tolerances compliant with ASTM A53/A53M, EN 10219, and GB/T 13793 standards.

Straight Welded Steel Pipe Technical Specifications

Our structural carbon steel tubing is manufactured according to internationally recognized standards, ensuring consistent quality across every production lot. Below are the key parameters:

Parameter	Specification
Standards	ASTM A53 Grade B, ASTM A500, EN 10219-1:2006, GB/T 13793-2016
Outside Diameter	21.3 mm – 660 mm (1/2″ – 26″)
Wall Thickness	1.0 mm – 25.0 mm
Length	5.8 m, 6.0 m, 11.8 m, 12.0 m, or custom cut
Yield Strength (min.)	240 MPa (ASTM A53 Gr. B)
Tensile Strength (min.)	415 MPa (ASTM A53 Gr. B)
Carbon Content	≤ 0.30% per ASTM A53
Weld Type	ERW / LSAW
Surface Treatment	Black, oiled, galvanized, or painted

Key Applications of Straight Welded Steel Pipe

Structural Construction: Building columns, trusses, scaffolding, and greenhouse frameworks where robust structural integrity is essential.
Water & Gas Distribution: Low-to-medium pressure pipelines for municipal water supply and natural gas delivery per ASTM A53 requirements.
Mechanical Engineering: Machine bases, conveyor supports, and automotive chassis components requiring precise dimensional control.
Fencing & Infrastructure: Highway guardrails, sign posts, and perimeter fencing that demand weather-resistant carbon steel tubing.

Why Choose Our Welded Carbon Steel Tubing

Every straight welded steel pipe we supply undergoes 100% non-destructive weld seam testing—including ultrasonic and eddy current inspection—to guarantee weld soundness. Our production lines feature automatic OD and wall thickness monitoring, maintaining tolerances within ±0.5% of specified dimensions. We hold ISO 9001:2015 certification and provide EN 10204 Type 3.1 mill test certificates with each shipment, documenting chemical composition, mechanical properties, and hydrostatic test results.

Straight welded steel pipe wholesale

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 5 metric tons per size specification. For mixed-container orders combining multiple dimensions, we accept a combined minimum of 10 metric tons.

Do you provide material test certificates?

Yes. Every order ships with EN 10204 Type 3.1 mill test certificates covering chemical analysis, tensile and yield strength results, and hydrostatic pressure test data.

What is the typical delivery time?

Stock items in standard sizes ship within 7–10 business days. Custom-produced straight welded steel pipe orders typically require 20–30 days depending on quantity and specification.

Can you cut to custom sizes?

Absolutely. We offer precision saw-cutting and bevel-end preparation services. Custom lengths from 1.0 m to 18.0 m are available upon request, with tolerances held to ±5 mm.

Straight welded steel pipe China

Get a Competitive Quote for Straight Welded Steel Pipe

Ready to secure factory-competitive pricing on premium grade straight welded steel pipe? Contact our sales team today with your required specifications—including diameter, wall thickness, length, and quantity—and receive a detailed quotation within 24 hours. We support FOB, CFR, and CIF trade terms to major global ports.

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Wei Chen

Singapore

2025-09-04

Acceptable Welded Pipe Quality with Packaging Issue Resolved

Ordered 10 tons of ERW pipe, 219.1mm OD × 8.0mm wall, mixed lengths of 6m and 12m, for resale to a construction client in Indonesia. The mechanical properties and dimensional accuracy were within specification — tensile strength at 421 MPa and OD tolerance at ±0.4%. However, on arrival at Singapore port, we found that roughly 15% of the 12-meter pipes had damaged end caps and some minor denting at the pipe ends from insufficient bundle padding. We raised this with the sales team and they provided a credit note within 48 hours and confirmed improved packaging for future orders. The material quality is acceptable but packaging for longer lengths needs attention. Will trial one more order to see if the improvement holds.

Chris Martin

Canada

2025-09-21

Reliable A53 Grade B Pipe for Gas Distribution Network

This was our second order — 22 tons of ASTM A53 Grade B ERW pipe, 114.3mm OD × 5.0mm wall, for a natural gas distribution line expansion in Alberta. The hydrostatic pressure test certificates and full chemical analysis reports were ready before we even requested them, which saved us time with the project owner's document submission. Carbon content was at 0.24%, well within the ≤0.30% limit. Weld seam on cross-section samples showed full penetration with no porosity. Delivered to Vancouver port within 10 business days — matched the stock-item delivery promise exactly. MOQ of 5 tons per size worked well for our mixed-spec requirements across this project.

William Taylor

Australia

2025-10-13

Good Value Welded Steel Pipe for Offshore Support Structures

Ordered 18 tons of LSAW pipe, 323.9mm OD × 9.5mm wall, for fabricating support frames on a coastal marine facility near Darwin. Type 3.1 mill certificates included hydrostatic test data and eddy current inspection records, which our certifying authority accepted without additional testing. Material yield strength came in at 261 MPa, comfortably above the 240 MPa minimum. One logistical note: the shipping documents arrived one day after the vessel departed, causing a minor customs delay at the port. The team corrected this quickly and the delay was only two days total. Material itself is solid and we would order again.