The Inner Ring prevents turbulence and erosion damage to the flange faces at the bore and also acts as a shield to protect the gasket bore and inner windings.
Materials commonly used are Mild or Carbon Steel, 316 Stainless Steel and 304 Stainless Steel.
Other materials include Titanium, Monel, Hastalloy, 321 and 320 Stainless Steel Nickel.
Stocks of Style CGIR Spiral Wound Gaskets are held from 15mm through to 750mm in standard flange sizes #150 (ANSI 150) to #1500 (ANSI 1500).
