ASTM A53 Grade B Galvanized Steel Pipe

Specification

Item	ASTM A53 Gr.B Hot-Dipped Galvanized ERW/Seamless Steel Pipe
Execution Standard	ASTM A53/A53M-22
Material	ASTM A53 Grade B (Gr.B)
Manufacturing Process	ERW/ Seamless
Cross-sectional Shape	Round
Surface Treatment	Hot-Dipped Galvanized (HDG)
Additional Surface	Black tube / Oil coating / Spray paint
Zinc Coating	Z550, customizable to Z275/Z300/Z260
Certification	ISO 9001, CE, BV/SGS Test Report
Processing Services	Cutting,Bending,Punching,Threading

ASTM A53 Grb Galvanized steel pipe character definition

• ASTM A53/A53M – Steel pipe designations defined by the American Society for Testing and Materials (ASTM). These designations apply to ferrous and hot-dip galvanized welded and seamless steel pipes, specifying technical specifications such as material composition, mechanical properties, dimensional tolerances, and galvanizing requirements.
• Gr.B – Abbreviation for Grade B, indicating that the steel pipe is of grade B. It is the primary grade under the ASTM A53 standard; Grade A is also available.
• Galvanized – Specifically refers to steel pipes whose surface has undergone hot-dip galvanizing. The zinc coating weight requirement is ≥1.8 oz/ft² (approximately 550 g/m²).
• Steel Pipe – Specifies that the product is a round carbon steel pipe. This standard specifies a circular cross-section, corresponding to both ERW and Seamless processes.

Features

1. Excellent Corrosion Resistance – Hot-dip galvanizing forms a dense oxide film, providing long-lasting and superior corrosion protection, even in humid and rainy environments.
2. High Strength and Toughness – As a Grade B steel pipe, its tensile strength ≥ 415 MPa and yield strength ≥ 240 MPa are superior to Grade A steel pipes, ensuring good impact resistance.
3. Good Processing Performance – Easy to weld, form, cut, and bend. In addition to galvanizing, it can be finished with a black patina, painted, or fitted with plastic caps.
4. High and Low Temperature Resistance – The base material can operate safely for extended periods at temperatures up to approximately 450°C. Hydrogen removal treatment after galvanizing avoids defects in the weld zone at high temperatures. In extremely cold regions, its toughness ensures the steel pipe is not prone to brittleness.

application

According to ASTM A53/A53M specifications, Gr.B steel pipes are specifically suitable for: mechanical applications, pressure applications, general pipelines, and forming operations.

Main Application Areas:

• Building and Structures: Used for scaffolding, factory structures, bridge supports, stadium frames, underground water supply and drainage, and heating pipelines.
• Low and Medium Pressure Fluid Transportation: Transports water, gas, fuel gas, steam, and other media; used in boiler rooms, municipal water supply, and compressed air systems.
• Agriculture and Firefighting: Sprinkler and drip irrigation networks, greenhouse steel structure frames, tubular fencing panels for livestock farming. Fire sprinkler systems.
• Public and Mechanical: Elevated billboard poles, streetlight poles, electrical conduits, mechanical parts, bearing sleeves, and equipment frames.

Comparison table of ASTM A53 Gr.B and similar standards

What is its manufacturing process?

The A53 Grade B GI pipe production process is divided into two forms: welded and seamless, which are the mainstream production methods explicitly covered by this standard. This specification allows the following three process types:

The upper limit for the temperature of steel pipes under this standard is around 343°C. If your project has higher temperature requirements, please consider ASTM A106 standard steel pipes specifically designed for high temperatures.

PIPE ENDS TREATMENT

Dimensions

Chemical composition

Material mechanical properties

Equivalent standards for each system

Weight Calculation Formulas

• Theoretical weight per meter = 0.0246615 × (OD − WT) × WT
• Weight per foot = kg/m × 0.67196
• Total weight = kg/m × Length (m)

Packaging and Delivery

Packaging Method	Standard Seaworthy Packing
Bundling Specifications	2-5 tons per bundle, customizable
Shipping Location	Tianjin, China
Delivery Time	15-21 days
Payment Terms	T/T 30% Deposit + 70% Balance Before Shipment
Trade Terms	FOB Tianjin, CFR, CIF, EXW, FCA
Minimum Order Quantity (MOQ)	20 Tons

Quality control

• 100% Hydrostatic pressure test.
• Eddy current test for ERW pipes.
• Ultrasonic test for seamless pipes.
• Tensile & flattening test.
• Dimensional inspection (OD, WT, length, ovality).
• Mill Test Certificate (MTC) available according to EN 10204 3.1.

Why Choose Glory Steel?

• Professional Quality – Certified by ISO 9001, CE, BV/SGS, and other international standards, with years of professional manufacturing experience.
• Selectable Specifications – Covering NPS DN6 to DN650, with a full range of sizes in stock for fast delivery.
• Comprehensive Service – Providing samples, OEM/ODM services, and one-stop service for cutting, bending, punching, and threading.
• Factory Pricing: Eliminating intermediaries, we fully consider costs, market conditions, and competition to provide you with products offering excellent value for money.

Glory Steel factory, located in Tianjin, China, is an ISO 9001 certified factory with an annual output of 100,000 tons. We specialize in manufacturing ASTM A53 Gr.B Black Seamless & ERW Pipe, ASTM A106 Gr.B Seamless Carbon Steel & A106 Gr.B Galvanized Steel Pipe, S355JR / S355J2 Steel Pipe. With our high-quality products and services, we export to over 120 countries.