BS1387 ERW Hot Dipped Galvanized Steel Pipe 1.OD:1/2"-10" WT:1.5-10mm,Length<=12m 2.Standard:BS1387,ASTM A53,GB/T3091,EN10255 BS1387 ERW Hot Dipped Galvanized Steel Pipe1.Standard:BS1387,ASTMA53,GB/T3091 ,OD:1/2"-10",WT:1.5-20mm,Length<=12m2.Zinc coated:270-350g/sqm3.Pipe end: plain end,bevelled end,threaded one end with plastic cpas,the other with couplings,grooved.