Size:1/2'' - 48'' Standard: API 5L, ASTM A106/A53, JIS G3456/3461 , DIN1626/ ... :ISO 9001, SGS, BV, etc. Steel Pipe for Boiler with JIS Standard1.Specification Type Seamless PipePipe Size1/2"—48" (DN15 ... G42,STPT42,STB42,STS42,STPT49,STS49Applicationpetroleum, construction ,shipbuilding,smelting, aviation, power, foodstuff, papermaking, chemical, medical equipment, boiler heat, exchanger, gas ...