ASTM A53 Welded Pipe - Carbon Steel Tubing for Structural and Mechanical Applications

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of ASTM A53 Welded Pipe

Property	Parameter	Description
Product Name	ASTM A53 Welded Pipe	Electric-resistance welded (ERW) carbon steel pipe
Material Grade	ASTM A53 Grade A / Grade B	Two grades available based on strength requirements
Standard Compliance	ASTM A53, ASME SA53, API 5L	Meets major international pipe standards
Manufacturing Process	ERW (Electric Resistance Welded)	Type E welded pipe per ASTM A53
Carbon (C)	≤0.25% (Gr A) / ≤0.30% (Gr B)	Carbon content per grade specification
Manganese (Mn)	≤0.95% (Gr A) / ≤1.20% (Gr B)	Improves strength and hardenability
Phosphorus (P)	≤0.05%	Controlled for improved ductility
Sulfur (S)	≤0.045%	Low sulfur for better weldability
Tensile Strength	≥330 MPa (Gr A) / ≥415 MPa (Gr B)	Minimum tensile strength per ASTM A53
Yield Strength	≥205 MPa (Gr A) / ≥240 MPa (Gr B)	Minimum yield strength per grade
Elongation	≥30%	Ductility in 50mm gauge length
OD Range	NPS 1/8 (10.3mm) - NPS 26 (660mm)	Available nominal pipe sizes
Wall Thickness	SCH 10 - SCH 160 / STD / XS / XXS	Standard schedule wall thickness options
Length	5.8m - 12m or custom	Single random, double random, or cut lengths
Surface Finish	Black, Galvanized (Hot-Dip Zinc Coated)	Plain end or galvanized per ASTM A53
End Finish	Plain End, Beveled End, Threaded & Coupled	Multiple end preparation options
Application	Structural, Water, Steam, Gas, Air Lines	Suitable for mechanical and pressure applications
Certification	EN 10204 3.1, ISO 9001, API 5L	Mill test certificates provided
Packaging	Bundled with steel strips, plastic caps	Standard export packaging
MOQ	5 tons	Minimum order quantity

ASTM A53 Welded Pipe - Carbon Steel Tubing for Structural and Mechanical Applications

ASTM A53 welded pipe is a versatile carbon steel tubular product engineered for structural, mechanical, and low-pressure fluid conveyance systems. Manufactured in accordance with ASTM A53/A53M specification, this electric-resistance-welded (ERW) pipe serves critical roles in construction frameworks, fencing, scaffolding, and general piping networks. Our mill-direct supply ensures consistent dimensional accuracy and reliable mechanical performance for contractors, fabricators, and industrial distributors worldwide.

ASTM a53 welded pipe supplier

What Is ASTM A53 Welded Pipe?

ASTM A53 welded pipe refers to carbon steel pipe produced through the electric-resistance welding process, classified as Type E under ASTM A53/A53M-22. Available in Grade A and Grade B, this pipe is intended for mechanical and pressure applications where moderate strength and good formability are required. The specification covers nominal pipe sizes from NPS 1/8 through NPS 26 with standard wall thicknesses per ASME B36.10M.

ASTM A53 Welded Pipe Technical Specifications

Grade B ERW pipe delivers a minimum yield strength of 240 MPa (35,000 psi) and a minimum tensile strength of 415 MPa (60,000 psi) per ASTM A53 Table X2.2. Chemical composition limits carbon content to 0.30% maximum, manganese to 1.20% maximum, phosphorus to 0.035% maximum, and sulfur to 0.035% maximum. Each length undergoes hydrostatic testing or nondestructive electric testing as specified in Section 10 of the standard.

ASTM a53 welded pipe wholesale

Property	Grade A	Grade B
Yield Strength (min)	205 MPa (30,000 psi)	240 MPa (35,000 psi)
Tensile Strength (min)	330 MPa (48,000 psi)	415 MPa (60,000 psi)
Carbon (max)	0.25%	0.30%
Manganese (max)	0.95%	1.20%

Common Applications of A53 ERW Carbon Steel Pipe

Structural columns, bracing, and building frameworks
Low-pressure steam, water, and natural gas distribution lines
Scaffolding systems and temporary construction supports
Fencing posts, handrails, and guardrail assemblies
Mechanical tubing for agricultural and industrial equipment

Why Source ASTM A53 Welded Pipe From Us

We maintain rolling-mill partnerships that enable factory-competitive pricing on standard and non-standard A53 welded pipe dimensions. Every heat is traceable with mill test certificates (MTC) conforming to EN 10204 Type 3.1. Our warehouse stocks Schedule 40 and Schedule 80 in lengths of 6 meters and 12 meters, with black and hot-dip galvanized finishes readily accessible for prompt dispatch.

Frequently Asked Questions

What is the minimum order quantity (MOQ) for ASTM A53 welded pipe?

Standard MOQ starts at 1 metric ton for stocked sizes. For custom dimensions or galvanized finishes, the typical minimum is 5 metric tons per size.

Do you provide material test certificates?

Yes. Every shipment includes original mill test certificates per EN 10204 Type 3.1, documenting chemical analysis, mechanical properties, and hydrostatic test results.

What is the typical delivery time for A53 ERW pipe?

In-stock items ship within 5–7 business days. Mill-produced or custom orders generally require 15–25 days depending on quantity and specification requirements.

Can you supply custom lengths or cut-to-size A53 pipe?

Absolutely. We offer precision cutting, beveling, and threading services. Custom lengths from 0.5 m to 12 m are available with tolerances per ASTM A53 Section 12.

Get a Competitive Quote for ASTM A53 Welded Pipe

Ready to secure value-driven pricing on ASTM A53 welded pipe for your next project? Contact our sales team with your required sizes, quantities, and delivery destination. We respond with detailed quotations—including freight estimates—within 24 hours. For applications requiring enhanced corrosion protection, explore our hot-dip galvanized steel pipe or ASTM A106 seamless pipe options.

ASTM a53 welded pipe China

Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Robert Brown

United Kingdom

verified purchases

2025-02-27

Acceptable A53 Pipe Quality with Initial Documentation Delay Resolved
Ordered 6 tons of ASTM A53 Grade B ERW pipe, NPS 3, Schedule 40, 12-meter lengths for a low-pressure steam line retrofit. The pipe itself met mechanical spec—yield and tensile values on the MTC were compliant. However, original EN 10204 3.1 certificates were not included in the first shipment and took an additional 5 working days to receive by courier, which caused a minor hold-up on our client's inspection sign-off. When we raised the issue, the sales contact responded promptly and expedited the documents. Pipe dimensions and surface condition were acceptable throughout. Supplier has since confirmed a revised documentation dispatch process. Willing to trial a follow-on order based on their response to the issue.

Wei Chen

Singapore

verified purchases

2025-03-22

Excellent Mill-Direct Pricing on A53 ERW Pipe for Regional Distribution
As a regional steel distributor, we placed a 45-ton trial order covering ASTM A53 Grade B ERW pipe in NPS 1 through NPS 10, Schedule 40 and Schedule 80, both black and galvanized finishes. Mill test certificates were original documents traceable to specific heats—important for our downstream customers who require full traceability. Dimensional inspection on arrival at our Singapore warehouse showed less than 0.3% non-conforming pieces, which is within acceptable tolerance for this volume. Freight quotation was included in the initial 24-hour response as stated. We have since placed two follow-on orders and are now listing this supplier as a preferred source for A53 ERW product.

William Taylor

Australia

verified purchases

2025-04-14

Reliable A53 Schedule 40 Pipe for Water Distribution Lines
Sourced 10 tons of ASTM A53 Grade B ERW pipe, Schedule 40, NPS 4 and NPS 6 in 6-meter lengths, for a rural water distribution project in Queensland. Pipe dimensions and wall thickness were consistent with ASME B36.10M tolerances throughout the lot. Hydrostatic test certification was included per spec. Compared pricing with two Australian distributors—landed cost was about 9% lower importing directly. Delivery took 24 days to Melbourne port, which was at the upper end of the quoted 15–25-day window for mill-produced material, though the supplier kept us informed throughout. Quality was solid and we would use them again.

Ahmed Al-Hassan

UAE

verified purchases

2025-05-01

Premium Hot-Dip Galvanized A53 Pipe for Fencing and Handrail Project
Ordered 8 tons of ASTM A53 Grade B hot-dip galvanized pipe, NPS 1.5 and NPS 2, for perimeter fencing and handrail assemblies at an industrial facility in Abu Dhabi. Zinc coating thickness was uniform and visually consistent—no bare spots observed on any piece. EN 10204 3.1 MTCs covered both mechanical properties and hydrostatic test results. Response to our RFQ came within 18 hours with full freight breakdown to Jebel Ali port. Dispatch from warehouse in 6 days. Will specify this supplier for our upcoming water treatment plant piping scope.

Hans Mueller

Germany

verified purchases

2025-05-20

Good Value A53 ERW Pipe for Mechanical Equipment Frames
Purchased 12 tons of ASTM A53 Grade A ERW pipe, NPS 2 and NPS 3, Schedule 40, for agricultural machinery frames. Mechanical properties on the MTC were compliant—tensile strength reported at 345 MPa against the 330 MPa minimum. Pricing was noticeably lower than our domestic ERW suppliers after comparing three quotes. Minor point: two bundles had surface rust from transit that required light cleaning before fabrication. Supplier acknowledged the packaging concern and said they would use additional moisture barrier on future export shipments. Overall a reliable source for standard structural tubing.

Carlos Silva

Brazil

verified purchases

2025-06-02

Outstanding ERW Carbon Steel Pipe for Industrial Piping Network
Placed a 30-ton order for ASTM A53 Grade B ERW pipe in mixed sizes NPS 2 through NPS 8, Schedule 40, for a low-pressure natural gas distribution network in São Paulo state. Chemical analysis on MTCs showed manganese at 1.08% and sulfur well below the 0.035% limit—clean heat chemistry throughout. Cut-to-size service for 3-meter and 4.5-meter custom lengths was precise, with beveled ends ready for our welding crew. Delivery to port in 22 days matched the confirmed schedule. Third consecutive order with this supplier; consistency is what keeps us coming back.

James Wilson

United Kingdom

verified purchases

2025-06-24

Superior Quality A53 Welded Pipe with Reliable Certification
We sourced 18 tons of ASTM A53 Grade B black pipe, Schedule 80, 12-meter lengths in NPS 3 and NPS 5, for scaffolding and structural bracing on a bridge refurbishment contract. Hydrostatic test records were included in the MTC package without us having to chase. Weld seam integrity was verified on-site with no failures during our own NDT checks. Quoted against 4 other suppliers—pricing was competitive and lead time of 19 days for mill-produced sizes was clearly communicated upfront. Solid supplier for critical structural applications.

Michael Johnson

United States

verified purchases

2025-07-09

Excellent A53 Grade B ERW Pipe for Commercial Construction
Ordered 22 tons of ASTM A53 Grade B ERW pipe, Schedule 40, NPS 4 and NPS 6, for a multi-story building framework project in Texas. Mill test certificates per EN 10204 Type 3.1 confirmed yield strength at 258 MPa and carbon content at 0.27%, fully within A53 spec. Dimensional tolerances were tight and consistent across all bundles—no rejects on our end. Shipped in 6-day from stock, arrived 2 days ahead of our site schedule. This is our second order this year and we'll be back for the next phase.