ASTM A182 Chrome-Moly alloy steel blind flanges (Grades F5 to F91) are engineered for extreme high-temperature and high-pressure service. These solid discs are critical for sealing piping ends in power plants and refineries where creep resistance is vital. Grades like F22 and F91 contain significant chromium and molybdenum to maintain mechanical strength and resist oxidation at temperatures exceeding 500°C. They provide a robust, bolt-on termination point that can withstand severe thermal cycling and pressure.
Technical attributes
Standard: ASME B16.5 / B16.47
Material Grade: ASTM A182 F5 / F9 / F11 / F22 / F91
Material Category: Chrome-Moly Alloy Steel
Flange Type: Blind (BLRF)
Pressure Class: 150 to 2500 LBS
Size Range: NPS 1/2 to NPS 60
Chromium Content: 1.0 to 9.5 percent
Molybdenum Content: 0.44 to 1.10 percent
Manufacturing: Forged and Machined
Heat Treatment: Normalized and Tempered
Min Yield Strength: 205 to 415 MPa
Tensile Strength: 415 to 585 MPa
Hardness: Max 143 to 248 HBW
Facing Type: Raised Face (RF) or RTJ
Surface Finish: 125-250 AARH
Service Temp: Up to 650 Celsius (Grade F91)
Certification: EN 10204 3.1
Primary Industry: Power Generation / Petrochemical
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
