ASTM A53 Galvanized Steel Pipe - Hot-Dipped Carbon Steel Tubing for Structural and Mechanical Use

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

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Technical Specifications of ASTM A53 Galvanized Steel Pipe

Property	Parameter	Description
Product Name	ASTM A53 Galvanized Steel Pipe	Hot-dip galvanized carbon steel pipe for general purposes
Material Grade	ASTM A53 Grade A / Grade B	Two grades available based on mechanical properties
Standard Compliance	ASTM A53, ASME SA53, BS 1387	Meets major international pipe standards
Manufacturing Process	ERW (Type F/E) / Seamless (Type S)	Electric resistance welded or seamless options
Galvanizing Method	Hot-Dip Galvanized per ASTM A123	Zinc coating for corrosion protection
Zinc Coating Thickness	≥610 g/m² (1.4 oz/ft²)	Minimum coating weight 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 ductility and weldability
Sulfur (S)	≤0.045%	Low sulfur for improved 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	≥29.5% (Gr.A) / ≥29.5% (Gr.B)	Ductility in 50mm gauge length
OD Range	1/2'' - 26'' (21.3mm - 660mm)	Available nominal pipe size range
Wall Thickness	SCH 10 - SCH 160 / STD / XS / XXS	Standard schedule and custom thickness
Length	5.8m, 6m, 12m or custom	Random or fixed length available
End Finish	Plain End, Beveled, Threaded & Coupled	Multiple end processing options
Application	Water, steam, gas lines, fencing, structural	General purpose and pressure applications
Certification	EN 10204 3.1, ISO 9001, API	Mill test certificate provided
MOQ	5 tons	Minimum order quantity

ASTM A53 Galvanized Steel Pipe - Hot-Dipped Carbon Steel Tubing for Structural and Mechanical Use

ASTM A53 galvanized steel pipe is a hot-dip zinc-coated carbon steel tubular product engineered for structural, mechanical, and pressure applications. Manufactured in compliance with ASTM A53/A53M-22, this pipe delivers exceptional durability against corrosive environments while maintaining robust mechanical properties. It serves critical roles in water transmission systems, building frameworks, scaffolding, and general industrial piping where long service life and reliable corrosion protection are essential. As a trusted steel pipe supplier with over 15 years of export experience, we provide mill-direct ASTM A53 galvanized pipe with full traceability and competitive factory pricing for global B2B buyers.

ASTM a53 galvanized steel pipe supplier

What Is ASTM A53 Galvanized Steel Pipe?

ASTM A53 galvanized steel pipe refers to carbon steel pipe conforming to ASTM A53 specification that has been coated with a protective zinc layer through the hot-dip galvanizing process per ASTM A123/A123M. This standard covers seamless and welded (ERW) pipe in two grades—Grade A and Grade B—with Grade B being the more commonly specified option due to its superior tensile properties. The zinc coating, typically ranging from 1.8 oz/ft² to 2.0 oz/ft² (550–610 g/m²), forms a metallurgical bond with the base steel, providing outstanding anti-corrosion performance that significantly extends the pipe's operational lifespan in exposed or buried installations.

ASTM A53 Galvanized Steel Pipe Technical Specifications

The following table outlines the key mechanical and chemical properties for ASTM A53 Grade B galvanized pipe, the most widely ordered grade in international trade:

Property	ASTM A53 Grade B Requirement
Yield Strength (min.)	240 MPa (35,000 psi)
Tensile Strength (min.)	415 MPa (60,000 psi)
Carbon Content (max.)	0.30%
Manganese Content (max.)	1.20%
Phosphorus (max.)	0.05%
Sulfur (max.)	0.045%
Zinc Coating Weight	≥ 1.8 oz/ft² (550 g/m²) per ASTM A123
Available Sizes (OD)	1/2" to 26" (DN15–DN650)
Wall Thickness	Schedule 10 through Schedule 160
Pipe Type	Type E (ERW), Type S (Seamless)
End Finish	Plain end, threaded, or grooved

Each pipe is hydrostatically tested at the mill in accordance with ASTM A53 Section 10, ensuring pressure integrity before shipment. For applications requiring different material grades, consider our ASTM A106 seamless steel pipe or EN 10255 galvanized steel tube options.

ASTM a53 galvanized steel pipe wholesale

Primary Applications of ASTM A53 Galvanized Pipe

Water and gas distribution: Municipal water mains, fire sprinkler systems, and natural gas supply lines where zinc coating prevents internal and external corrosion
Structural and architectural frameworks: Building columns, handrails, greenhouse frames, and fence posts requiring weather-resistant steel tubing
Scaffolding and construction: Temporary and permanent support structures that demand superior tensile properties and impact resistance
Mechanical and industrial piping: Steam lines operating below 400°F (204°C), compressed air systems, and oil field flow lines
Agricultural irrigation: Center-pivot and lateral-move irrigation systems exposed to soil moisture and chemical fertilizers

Frequently Asked Questions

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

Our standard MOQ is 5 metric tons per size and specification. For mixed-container orders combining multiple dimensions, we accept a total minimum of 10 metric tons to optimize shipping efficiency.

Do you provide material test certificates with each shipment?

Yes. Every order ships with EN 10204 Type 3.1 Mill Test Certificates (MTC) documenting chemical composition, mechanical test results, hydrostatic test pressure, and zinc coating thickness measurements traceable to the producing heat.

ASTM a53 galvanized steel pipe China

What is the typical delivery time for galvanized A53 pipe?

Stock sizes in Schedule 40 and Schedule 80 are commonly available for dispatch within 7–10 business days. Custom lengths, non-standard wall thicknesses, or large-volume orders typically require 25–35 days from order confirmation to port loading.

Can you supply ASTM A53 galvanized pipe cut to custom lengths?

Absolutely. While standard production lengths are 6 meters (20 ft) and 12 meters (40 ft), we offer precision cutting to any specified length with a tolerance of ±3 mm. Threading, grooving, and beveling services are also available upon request.

Get a Competitive Quote for ASTM A53 Galvanized Steel Pipe

Whether you need a single container of Schedule 40 galvanized pipe or a multi-shipment annual supply contract, our dedicated export team is ready to provide value-driven pricing with fast turnaround. Contact us today with your required specifications—including size, wall thickness, quantity, and destination port—and receive a detailed quotation within 24 hours. All ASTM A53 galvanized steel pipe orders are backed by rigorous third-party inspection and comprehensive after-sales support.

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

Wei Chen

Singapore

verified purchases

2025-02-11

Perfect Galvanized A53 Pipe Supply for Annual Distribution Contract
We have been sourcing ASTM A53 Grade B galvanized pipe from this supplier for our Southeast Asian distribution network for two years. Current annual volume is approximately 180 tons across multiple sizes from 0.5-inch to 8-inch in Schedule 40 and Schedule 80. Quality has been consistent across all 14 shipments — MTCs show zinc coating averaging 572 g/m² and tensile strength consistently between 418–435 MPa. The supplier accommodates our mixed-container consolidation requirements efficiently, with a minimum 10-ton threshold that suits our order patterns. Average lead time across all orders has been 24 days to Singapore port. Export documentation is always accurate and submitted within 48 hours of vessel loading. This is our primary source for A53 galvanized pipe for the region.

Chris Martin

Canada

verified purchases

2025-03-05

Acceptable A53 Galvanized Pipe Quality with Coating Variance Issue Resolved
Ordered 11 tons of ASTM A53 Grade B galvanized pipe in 4-inch Schedule 40 for compressed air system piping at a manufacturing facility in Ontario. Most of the material was on-spec — MTC showed tensile strength at 422 MPa and carbon at 0.28%. However, our incoming inspection found zinc coating weight on one bundle measured at 531 g/m², marginally below the 550 g/m² ASTM A123 minimum. Raised this with the supplier immediately — they acknowledged the variance, provided a supplementary third-party coating test report, and issued a partial credit within 5 business days. The affected quantity was small and did not impact our project timeline. Resolution was handled professionally. Would consider reordering but will request pre-shipment coating verification on future orders.

Carlos Silva

Brazil

verified purchases

2025-03-27

Reliable Galvanized A53 Pipe for Scaffolding and Construction Use
We ordered 22 tons of ASTM A53 Grade A galvanized ERW pipe in 1.25-inch and 2-inch Schedule 40 for scaffolding rental fleet expansion across our São Paulo operations. Mechanical properties on the MTC were consistent — tensile strength at 334 MPa against the Grade A minimum of 331 MPa. Zinc coating weight averaged 557 g/m². Pricing was 8% below our previous European supplier for equivalent certified material. Delivery to Santos port took 34 days, slightly longer than the initial 28-day estimate due to port congestion at origin, though the supplier communicated the delay proactively. Documentation was complete and accepted by Brazilian customs without revision. Solid supplier for high-volume structural pipe procurement.

William Taylor

Australia

verified purchases

2025-04-15

Premium A53 Galvanized Pipe for Offshore Platform Handrail Structures
Sourced 9 tons of ASTM A53 Grade B galvanized pipe in 1.5-inch and 2-inch Schedule 40 for handrail and safety barrier fabrication on an offshore support vessel refit in Fremantle. The zinc coating uniformity was excellent — no bare spots or thin patches detected during our incoming QC inspection using magnetic thickness gauges. Tensile strength on the MTC read 431 MPa. Supplier provided grooved end finishing on 60% of the order to our Victaulic coupling dimensions, and the groove geometry was accurate. Compared quotes from four suppliers — this one offered the best combination of certified quality and lead time. Shipment reached Melbourne in 26 days. Already discussing volume pricing for our next vessel project.

Ahmed Al-Hassan

UAE

verified purchases

2025-05-13

Good Value Galvanized A53 Pipe for Water Distribution Project
We placed an order for 18 tons of ASTM A53 Grade B galvanized pipe in 2-inch and 3-inch Schedule 40 for a municipal water distribution network in Abu Dhabi. Material quality was solid — MTC showed carbon at 0.27% and zinc coating at 554 g/m², both within ASTM A53 and A123 requirements. Pricing was competitive compared to three other Chinese suppliers we evaluated. Delivery to Jebel Ali took 29 days, which was acceptable. One minor point: two bundles had minor transit marking smudges on the pipe ends, though this had no impact on material performance. Supplier responded promptly and offered credit for the cosmetic issue. Overall a reliable source we will continue to use for upcoming phases.

Hans Mueller

Germany

verified purchases

2025-06-02

Superior Galvanized A53 Pipe for Agricultural Irrigation Infrastructure
Purchased 20 tons of ASTM A53 Grade B seamless galvanized pipe in 3-inch and 6-inch Schedule 80 for a large-scale center-pivot irrigation project in Bavaria. Zinc coating thickness measurements on the MTC averaged 598 g/m², consistent across all tested samples. Yield strength reported at 262 MPa, comfortably above the 240 MPa minimum. Custom cutting to 9-meter lengths was handled accurately — measured tolerance was within ±2 mm across all pieces checked. Supplier's export team provided proactive updates at each production milestone. Hamburg port delivery completed in 31 days. Quality matches what we previously sourced from European mills at a significantly more competitive ex-works price.

James Wilson

United Kingdom

verified purchases

2025-06-24

Outstanding Quality A53 Galvanized Pipe for Fire Sprinkler Systems
Ordered 12 tons of ASTM A53 Grade B ERW galvanized pipe in 1-inch and 1.5-inch Schedule 40 for fire sprinkler installations across three commercial properties in Manchester. Hydrostatic test records were included with each bundle, and chemical composition showed phosphorus at 0.038% and sulfur at 0.031% — well within A53 limits. Threaded end finish was precisely cut with no burring issues. Supplier arranged third-party SGS inspection at origin without any pushback. Lead time was 22 days to Felixstowe. Documentation package was complete on first submission — no chasing required. Will be placing our Q3 order shortly.

Michael Johnson

United States

verified purchases

2025-07-09

Excellent ASTM A53 Galvanized Pipe for Commercial Building Framework
We sourced 28 tons of ASTM A53 Grade B galvanized pipe in 2-inch and 4-inch Schedule 40 for a multi-story commercial building framework project in Texas. Mill test certificates confirmed tensile strength at 428 MPa and zinc coating weight at 562 g/m², both exceeding spec minimums. EN 10204 Type 3.1 MTCs were clean and fully traceable to heat numbers. Pipes arrived with plain ends in perfect condition, no zinc flaking or surface defects. Delivered to Houston port in 18 days from order confirmation. Third consecutive order with this supplier — their consistency on galvanizing quality is what keeps us coming back.