... steel strip and soft non-metallic packingFiller: flexible graphiteInner/ Outer Ring: Carbon Steel, SS304, SS316, Monelworking temperature: -200__870working pressure: ... typed flange;2. IR type: the type with inner ring is the sealing gasket used for the embedded flange ... Steel belt: 304, 321, 316, 316L, etc.B. Ring material: low carbon steel, 304, 316, 316L, etc.C. Nonmetal belt: flexible graphite ...