... highest quality and competitive price. A53 GRB Seamless Steel Pipe,seamless carbon steel pipe, seamless steel tube,OD: 1/4---28in.or ... 6-12m Despite of the above standards, we can also supply seamless steel pipes with standard of API 5L---2000, DIN17175/DIN1629 ... products according to the requirements of our clients. Application: Seamless steel pipes for low and medium pressure boiler, high pressure ...