ASTM A53 Grade B Sch 80 ERW Pipe

What is ASTM A53 Grade B Sch 80 ERW Pipe?

ASTM A53 Grade B Sch 80 ERW Pipe is a type of carbon steel welded pipe that conforms to the ASTM A53 standard, has Grade B strength, features a thicker wall, and is manufactured using a high-frequency electric resistance welding process. Its core characteristic is achieving high pressure resistance and high mechanical strength at room temperature using economical processes and materials, providing a more economical solution than seamless pipe and a stronger solution than standard wall thickness pipe.

ASTM A53: General-purpose carbon steel pipe standard, covering both welded and seamless processes.
Grade B: Carbon steel material grade, yield strength ≥ 240 MPa. There are two grades: A, B, and C. Grade B is the most widely used grade in the standard, providing good basic strength and toughness.
Sch 80: Wall thickness grade, representing "thicker wall," suitable for medium and high pressure conditions, providing higher bending strength and pressure resistance. The Sch 80 wall thickness is approximately 30%-100% thicker than the Sch 40 standard pipe.

ERW: Manufacturing process, high-frequency electric resistance welding. This is a highly efficient and economical welding method.

Advantages of A53 Sch 80 ERW Pipe:

1. High pressure resistance and high strength: The thickened walls of Sch 80 provide higher pressure resistance and resistance to mechanical impact and bending.
2. High cost-effectiveness: Compared to seamless pipes of the same specifications (whether A53 or A106), ERW welded pipe is significantly cheaper, offering the best economic performance while meeting strength requirements.
3. Mature technology: Modern ERW welds produce high-quality welds with reliable performance after heat treatment.

Surface treatment: Carbon steel pipe surfaces can be treated with anti-corrosion coatings (such as black paint or galvanizing) to enhance corrosion resistance.

Limitations: 

A53 standard welded pipe is strictly prohibited from use in high-temperature systems; its material is not designed for high temperatures.

Application:

ASTM A53 Sch 80 ERW Pipe is designed for applications requiring high strength and pressure resistance, but with moderate temperatures and limited budgets:

1. High-Pressure Fluid Systems
Medium-to-high pressure hydraulic system piping.
High-pressure fire water systems (e.g., deluge systems).
Plant compressed air mains.

2. Abrasion and High-Impact Environments
Material transport piping (e.g., ore, granules).
Abrasion-resistant protective tubing for engineering machinery.

3. Heavy-Duty Structural Components
High-load equipment frames and supports.

Heavy-duty protective structures.

Read more: ERW Pipe Wall Thickness Size Chart