Product: S31803 Spiral Wound Gasket Outer Ring Material: Duplex Stainless Steel Inner Ring Material: S31803+ Graphite Size: 14 Inch Pressure: CL150 End: RF Flange Coating: As per client request Type: Inner RING, Outer Ring; Inner and Outer Ring etc. Standard:ASME B 16.20, BS EN 1092, DIN, JIS, and NF, etc the alteration of temperature and pressure are frequent.