Home / Catalog / Tube Backing Ring Tube Backing Ring Sizes to fit both tube stub ends and tube angle ends Available in: T-316L Stainless Steel tube backing rings T-304L Stainless Steel tube backing rings Class 75 and Class 150 Thicknesses Available Carbon Steel – coated for corrosion protection Coatings Include: Electro-Zinc Plate E-Coat Epoxy Class 75 Tube Flanges (80) Class 150 Tube Flanges (40) Request Information