Carbon steel ERW pipe specification

When selecting Carbon Steel ERW (Electric Resistance Welded ) Pipes, it's essential to consider various specifications to ensure they meet the requirements of your application. Here are key specifications typically associated with carbon steel ERW pipes.

1. Standard Specifications
API 5L: Specifies requirements for line pipe used in the oil and gas industry, covering both seamless and welded pipes.
ASTM A53: Covers black and hot-dipped galvanized welded and seamless steel pipes for mechanical and pressure applications.

ASTM A500: Covers cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes.

2. Material Grades
Common grades for carbon steel ERW pipes include:
Grade A: Suitable for low-pressure applications.
Grade B: Higher strength and widely used in oil and gas applications.
X42, X52, X60, X65: Higher-grade options with enhanced mechanical properties for high-pressure pipelines.

3. Dimensions
Nominal Pipe Size (NPS): Typically ranges from 1/2 inch to 24 inches and larger, depending on the application.
Wall Thickness: Varies based on pressure requirements, commonly from schedule 10 to schedule 160 (e.g., Sch 40, Sch 80 pipe).

4. Mechanical Properties
Yield Strength: Generally ranges from 35,000 psi (Grade A) to 65,000 psi (Grade X65).
Tensile Strength: Typically ranges from 58,000 psi to 80,000 psi depending on the grade.
Elongation: Varies based on thickness but generally ranges from 20% to 30%.

5. Chemical Composition
Carbon (C): Usually up to 0.26% for most grades.
Manganese (Mn): Typically ranges from 0.60% to 1.65%.
Phosphorus (P): Maximum of 0.04% for structural grades.
Sulfur (S): Maximum of 0.05%.

6. Coating Options
Galvanized: Hot-dipped for corrosion resistance.
Polyethylene or Epoxy: For additional protection in corrosive environments.

7. Testing and Inspection
Hydrostatic Testing: To ensure the pipe can withstand internal pressure.
Non-Destructive Testing (NDT): Methods such as ultrasonic testing or radiographic inspection to check weld integrity.

8. Applications

Suitable for transporting fluids in oil and gas pipelines, construction, and structural applications.

Read more: ERW Steel Pipe Manufacturing Process