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The Alloy Steel Blind Flange is a forged pipe end closure component manufactured from ASTM A182 F11/F22 chromium-molybdenum alloy steel. Designed to provide a reliable, positive seal at the termination of piping systems, pressure vessel openings, and valve connections, this blind flange is ideal for high-temperature and high-pressure applications commonly found in refinery, chemical, and power plant environments.
Key Features
Chrome-Moly Alloy Steel: ASTM A182 F11/F22 material offers superior strength and creep resistance at elevated temperatures up to 600°C
Positive End Closure: Solid round plate design with no center bore provides complete sealing of pipe ends
High-Temperature Performance: Specifically designed for sustained operation under high-temperature, high-pressure conditions
Full Bolt Hole Pattern: Machined with complete bolt holes matching the corresponding flange specification
ANSI B16.5 Compliant: Manufactured to precise ANSI/ASME B16.5 dimensional and material standards
Technical Specifications
Flange Type
Blind (BL)
Material Grade
Alloy Steel ASTM A182 F11, F12, F22
Standard
ANSI B16.5 / ASME B16.5
Pressure Class
Class 150, 300, 400, 600, 900, 1500, 2500
Size Range
1/2 inch NB to 48 inch NB
Facing Type
Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Operating Temperature
Up to 600 Degree Celsius
Certification
ISO, TUV, SGS
Applications
Boiler and pressure vessel end closures
Pipeline isolation and terminal points
Valve and equipment nozzle blanking
Refinery high-temperature systems
Power plant steam and feedwater piping
Hydrogen service and reformer units
Packaging & Delivery
Each blind flange is treated with anti-rust coating and packed in heavy-duty standard shipping packages. Flange faces are protected with plastic caps. Delivery within 15-30 working days.
TOBO GROUP sales head offce in Shanghai.
We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ... TOBO GROUP sales head offce in Shanghai.
We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ...