... Pipe coupling,pipe clamp fittings,flexible coupling 1:we can supply: NameCoupling, elbow, tee, cross, reducer, cap, mechanical ... ",DN15-DN500MaterialDuctile ironFinishPaint, Epoxy or Galvanization ApprovalFM/ULUsage1) Automatic sprinkler system for fire protection on commercial, civil and ... protection,mines,power,chemical industry and urban water supply and discharge.When it is connected with pumps, ...