Seal off piping systems with our AWWA Class SF Stainless Steel Blind Flanges (Series SPFBL-F) that meet AWWA C228 specification and ANSI #300 bolt pattern. At atmospheric temperature, this blind flange is pressure rated up to 300psi. Notes:a. Dual grade 304/304L & 316/316L Stainless Steel material conforms to the requirements of AWWA C228 specifications. Other material is available upon request.b. Meets ANSI class 300 pattern.Pressure Ratings: 300psi at atmospheric temperature. .pf-button.pf-button-excerpt { display: none; }