... 60mm Standard:ASTM,GB,EN,DIN, seamless steel pipe Details:seamless pipeCertificate:API & ISO Size:168 ... special requirements. Product Picture: Production Flow Chart: Quality control: Loading:Transaction process:About us:Our ... for many years, the products's quality is very high, and the price is compective in the ... for many years, the products's quality is very high, and the price is compective in the ...