Specification: Metal Ring gasket is by Smithing, heat treatment and mechanical processing. it issuitable for oil or gas pipe flange,pressure vessel, high speed joint face, valvewith high temperature and high pressure. it has good sealing performance evenwhen the pressure and temperature is not stable.the typical style r are dividedinto ellipse style and octagonal style according to its cross section. the standardstyle r gasket is made conform to the API 6a & ASME b16,20 standard, can bear10000psi pressure at most. the octagonal style and ellipse style can be interchangedin flange with trapezum groove. style rx is an improvement of style r inpressure resistant. it is a standard ring gasket suitable for all the flange sealingwhich is suitable for style r. style by is another item with a high pressureresistant up to 15000psi. we have some different material and style which cancorrespond to different design and operation demand please see the following tablefor the reference of material characteristic. Detail information pls contact us ,we will supply the e-catalog.