... ,ASME,DIN,GB 2.Material:alloy 3.Certification:ISO9001:2008 round long alloy metallurgy furnace tube1.Standard:ASME A608;HG/T 2601 ... casting5.Quality:appearance of smooth,can work under presure for long time,advanced testing equipment to ensure thye quality,6.Packing ... ,T/T11.Application:Used for metallurgical and building material industry round long metallurgy furnace alloy tube