It is a component which has three parts joined together, Seat Flange + Seat Extension + Seat Ring.
Size: 6" - 24"
Class: 150 / 300 / 600 / 900 / 1500 / 2500
Material: Mild Steel, Alloy Steel, Stainless Steel & Special Steel
Grade: WCB/A105, F316, F304, F6a, F22, F51, F347, Monel 400, Inconel X-750, Incoloy 800, Hastelloy C-276 & Other alloy steels as per clients requirements