Check flange facing types and sealing finish options such as raised face, flat face and RTJ.
Check common sealing face types before selecting a flange product page or sending drawing requirements.
Flange facing: the finish of contact faces of pipe flanges and connecting end flanges of fittings shall be judged by visual comparison with Ra standards, not by instruments having stylus tracers and electronic amplification. Other finishes may be supplied by agreement between user and manufacturer.
Raised face and large male and female: either a serrated concentric or serrated spiral finish having 24 to 40 grooves per inch shall be used. The cutting tool shall have a 125 microinch roughness.
The most widely used gasket finish because it is suitable for ordinary service conditions. It is a continuous spiral groove. Flange sizes 12 inch and smaller are produced with a 1/16 inch round-nosed tool at a feed of 1/32 inch per revolution. Sizes 14 inch and larger are finished with a 1/8 inch round-nosed tool at a feed of 3/64 inch per revolution.
This finish is produced by using a 90-degree included-angle V tool, making a spiral groove 1/64 inch deep and 1/32 inch apart.
This finish is produced by using a 90-degree included-angle V tool, making concentric grooves 1/64 inch deep and 1/32 inch apart.
This finish is produced by tool shapes, cutting speeds and feeds that leave no definite tool marks apparent to the naked eye.
Raised face is one of the most common flange sealing faces. Confirm RF height, pressure rating and gasket requirement when sending RFQ.
RTJ flanges use a machined groove and metal ring gasket for higher pressure sealing conditions.
Blind flanges and matching sealing faces should be confirmed together with pressure rating, material and gasket type.
Send your drawing, gasket requirement or mating flange details and we will help confirm the correct facing option.
Drawings, inquiry files and destination details help sales check your flange requirement faster.