1. What is ERW pipe?
ERW means Electric Resistance Welded pipe. It is made by forming a steel strip into a tube and welding the seam with electric resistance heat without filler metal.
2. What is the difference between ERW and seamless pipe?
ERW pipe has a longitudinal weld seam; seamless pipe has no weld and is made from a solid billet. ERW is more cost-effective for mass production.
3. What are common steel grades for ERW pipe?
Common grades:Q195, Q235B, Q355B, ST37, ST52, S235JR, S355JR, A53 Grade A/B, A106 Grade B.
4. What is API 5L pipe used for?
API 5L welded pipe is used for oil and gas pipelines, water transmission, and industrial pipeline systems.
5. What do L245, L290, L360, L415, L485 mean?
These are API 5L line pipe grades. The number represents minimum yield strength in MPa.
