3176MS Weld Collar and Gasket

The Betts 3176MS is a 20-inch steel weld collar (part of Betts’ clamp-ring style manhole collar system) designed to be welded onto tank or vessel shells. When used with a matching gasket (such as Betts 3560BN for 20″, available in materials like Buna-N, FKM, or Hypalon), it provides a reliable seal between the manhole cover and the collar via a clamp ring .The collar must be fixtured during welding to ensure it remains flat and round, preserving its sealing integrity