... B1.20.1, ASTM A733/ A53 /A106, ST37-2EN10241, BS1387, ISO7-1,DIN2999, DIN2986SpecificationFull socket, Half socketSurfaceHot dipped galvanized, ... " Useage of screwed half coupling: conncet cali duct, water pipe, fire-fighting equipment or other gas, water ,oil and ... Egdes: banded, beaded or plain Hydrostatic Test: Pressure Test 2.4MPa Working Pressure 1.6MPa Packing: Carton or Weaing bag ,according ...