... A536, Grade 65--45--12 1) UL / FM appvoal UL/FM 2) Standard grooved specifications: according to VICTAULIC3) Material: ... , ASTM, DIN, JIS, GB, BS, etc.TypeManufacturerSize1/2"-12"MaterialDuctile ironFinishPaint, Epoxy or Galvanization ApprovalFM/ULUsage1) Automatic ... constructions like water supplying, gas supplying, heat supplying, etc.2) Industrial pipeline system on shipping, mine, oil field, ...