... Japanese JISGerman DINChinese GBBS standard5. Main Material:(Carbon Steel & Low Alloy steel)ASTM A53, A106, A210, A252, A333 etc ... ,Epoxy Coating 9. Usage:Widely used in the mechanical treatment field, petrochemical industry, transport and construction fieldOrdinary ... specializing in producing, processing, and transportation of the steel pipes. Workshops and advanced production line! Advanced testing ...