ERW Pipe Grades And Specifications

ERW (Electric Resistance Welded) pipes are a type of pipe commonly used in various industries for conveying fluids, gases, and other materials. They are manufactured by joining two strips of metal together and welding them along their length using electric resistance heat. The grades and specifications of ERW pipes are determined by international and national standards, such as the American Petroleum Institute (API) and the American Society for Testing and Materials (ASTM).

Here are some common ERW pipe grades and their specifications:

1. **API 5L**: This specification covers electric resistance welded steel pipe for use in conveying gas and oil. API 5L is divided into two main grades: Grade X42, which has a minimum yield strength of 42,000 psi, and Grade X65, which has a minimum yield strength of 65,000 psi. There are other grades available with higher strength levels.

2. **ASTM A53**: This specification covers carbon steel pipe for mechanical and pressure purposes. ASTM A53 Grade A is the lowest grade available, with the highest grade being Grade B. ERW pipes produced to ASTM A53 standards are commonly used for structural purposes and low-pressure conveyance.

3. **ASTM A106**: This specification covers seamless carbon steel pipe for high-pressure service. ERW pipes can also be produced to this standard, although it is more commonly associated with seamless pipes. ASTM A106 Grade B is a common grade for high-pressure applications.

4. **ASTM A36**: This specification covers hot-rolled, carbon structural shapes, plates, and bars. ERW pipes can be produced from ASTM A36 material, making them suitable for general structural purposes.