... -22mm 3.lenth:3mtr-18mtr product name: oval carbon erw elliptic tube flat over steel pipe 1 outside diameter:10-610mm 2 ... .Competitive price,best service,quanlity 1.Commodity NameOval Carbon Erw Elliptic Tubes2.StandardASTM-A500,EN10219,EN10210,BS1387-85,GB/T3091-2001 ... , etc13.CertificatesAPI 5L , API 5CT, ISO ,CE oval carbon erw elliptic tube