ASTM A53 is the American Society for Testing and Materials (ASTM) standard specification for "Black and Hot-Dip Galvanized, Welded and Seamless Steel Pipes." This specification covers steel pipes manufactured using both welded (Type F, Type E) and seamless (Type S) processes, with our focus being on the seamless steel pipe section.

This explicitly indicates that the steel pipe is manufactured using a seamless process, without welds.

• Grade B: Most commonly used and prevalent grade. Yield strength: 240 MPa (35 ksi), Tensile strength: 415 MPa (60 ksi)
• Grade A: Lower strength, less frequently used. Yield strength: 205 MPa (30 ksi), Tensile strength: 330 MPa (48 ksi)
• Grade A25: Very special, rarely used in seamless steel pipes, primarily specified for threaded pipes

ASTM A53 has relatively broad requirements for chemical composition and is a type of carbon steel. Its main elemental content (carbon, manganese, phosphorus, and sulfur) meets general engineering requirements, but is not as stringent as some specialized pressure vessel or boiler steels.

Available as uncoated black tubing or hot-dip galvanized for corrosion protection. Galvanized products are typically marked as "Galvanized (Galv.)".

ASTM A53 Gr.B seamless tubing serves as a "general-purpose pipe" across many industries due to its excellent mechanical properties, machinability, and cost-effectiveness.

• Water, gas, oil, and steam transport pipelines (core application)
• Building interiors for fire sprinkler systems
• Domestic water pipes and HVAC systems

• Scaffolding, guardrails, and fences
• Structural supports where extremely high strength is not required

• Shafts, sleeves, and rollers that do not withstand high pressure

• Non-load-bearing or secondary load-bearing structural components

Export standard package, bundled or as required.

According to order quantity.

• By sea (Container or Bulk)
• By air or express: small size samples