Product Name: R- Ring Joint Gasket Model NO.: RS2-R Standard: Standard or as The Customer's Requirement Shape: O-Ring Material: Soft Iron, Low Carbon Steel, F5, S410, S304, S316 Brand: Rilson Trademark: RILSON Transport Package: Carton Case, Wooden Case Specification: ASME DIN and etc Origin: China, Zhejiang Product Description Ring Joint Gasket used to stand high pressure and temperatures and they are employed where corrosive agents are present. They are used to stand high pressure and temperatures and they are employed where corrosive agents are present. These gaskets are designed in oval/octagonal shapes confirming to R, Bx and Rx series of API std 6A. The R-Type ring gaset can be ordered to two different profiles, oval or octagonal in cross-sections. Both types have identical pitch diameter as the flange groove they correspond to. These gaskets are used in pressures up to 10, 000 PSI. The octagonal type has a higher sealing coeffient than the oval, therefore being the better gasket of the two. The oval type is the only gasket that will fit a bottom radiused groove. Flanges with flat bottom V-grooves will accept either style. Gaskets that have been torqued initiating a metal-to-metal seal should be discarded and not reused. If you are interested in our products, please contact me in Email and I will reply as soon as possible.MAXIMUM HARDNESSMATERIALUNS NUMBERBRINELL*ROCKWELL B†IDENTIFICATIonSoft Iron9056DLow Carbon Steel12068S4–6% Chrome 1/2% MolyK4254413072F5Type 304 Stainless SteelS3040016083S304Type 316 Stainless SteelS3160016083S316Type 347 Stainless SteelS3470016083S347Type 410 Stainless SteelS4100017086S410Titanium Grade 2R50400Alloy 600N06600200Alloy 625N06625200Alloy 800N08800200Alloy 825N08825160HastelloyN10001200Alloy C276N10276200SMO 254S32154180Zeron 100200Super DuplexS31803Standards for Ring Joints Gaskets used with flangesRJG StyleRJG standardFlange standardRASME B 16.20 API 6AANSI B 16.5 ANSI B 16.47 Series A