... from many customers since our good quality and service. 2. Production standard: ASTM A53, BS1387, EN10255, EN10240, EN10220, EN10219, EN39, JIS3 ... WT:0.8mm-8.5mm Length:12m PRODUCTHOT DIP GALVANIZED STEEL PIPE/GI LINE PIPETECHNIQUEWELDED/ERWMATERIALQ195,Q215,Q235,Q275, Q345 SIZEOUTER DIAMETER:21 ...