... pipe 1Standard uniform size 2Through a number of authentication 3standards: ASTM,GB,DIN,JIS ... ---1999 GB8162---1999 GB3087---1999 ,JIS ,DINDespite of the above standards, we can also supply seamless ... steel pipes with standardof API 5L---2000, DIN, JIS and so on, ... and also develop new products accordingto the requirements of our clients. Application: Seamless steel pipes for ...