1.pipe fitting FM/UL approved 2.Materail: ... Epoxy or Galvanization ApprovalFM/ULUsage1) Automatic sprinkler system for fire protection on commercial, civil and municipal ... gas supplying, heat supplying, etc.2) Industrial pipeline system on shipping, mine, oil field, textile, powder ... plant, etc.3) Pipeline system on subway station, railway station, airport, seaport, bridge, ...