In the past, boiler tubes and steel pipes for pressure vessels were all seamless boiler tubes. With the maturity of welding technology, welded steel pipes for pressure vessels have appeared in recent years, and their performance and quality can basically replace seamless steel pipes. Welded steel pipes for boilers are divided into three.
1. Electric-welded steel pipes (
ERW pipe) for low and medium pressure boilers, according to the standard YB 4102-2000. The steel pipes have certain strength, good plasticity, toughness, weldability and workability; they are suitable for the production of low and medium pressure boilers and low and medium pressure boilers of various structures. Pipes for locomotive boilers.
2. Welded steel pipes for boilers and heat exchangers shall comply with the standard GB/T 28413-2012. This welded boiler pipe is suitable for welded steel pipes for heat exchangers and medium and low pressure boilers, but not for stainless steel welded steel pipes. The outer diameter D of the steel pipe is not more than 305mm, the wall thickness S is not more than 8mm, and the usual length of the steel pipe is 2000-18000mm.
3. Austenitic stainless steel welded steel pipes for boilers and heat exchangers, according to the standard GB/T 24593-2009, suitable for heat exchangers and medium and low pressure boiler tubes. The outer diameter D of the steel pipe is not more than 305mm, the wall thickness S is not more than 8mm, and the usual length of the steel pipe is 2000-18000mm.
