galvanized tube ERW steel pipe 1 outside diameter:21.3-610mm 2 wall thickness: 1.5-22mm 3 contact: Will Xu 1. galvanized tubegalvanized ... 5.Competitive price,best service,quanlity 1.Commodity Namehot dipped galvanized pipe2.StandardBS1387,API 5L, API 5CT,ASTM A53,ASTM A252 ... , France, England, Belgium, etc13.CertificatesAPI 5L , API 5CT, ISO ,CE galvanized tube