Blind Flange – 3" Class 900 Raised Face (RF)

The 3" Class 900 Raised Face (RF) Blind Flange is a massive, heavy-duty forged pipeline component engineered to safely and completely seal off the ends of piping systems, valves, or pressure vessel openings. Rated for Class 900 high-pressure applications, this 3-inch blind flange provides an impenetrable, permanent or temporary barrier in extreme industrial environments, ensuring absolute fluid containment and preventing hazardous leaks during system isolation, maintenance, or future pipeline expansion.

Unlike slip-on or weld-neck flanges that allow fluid to pass through, a blind flange is a solid, unbored disc. When bolted onto a corresponding open flange, it creates a robust dead-end cap capable of withstanding immense internal line pressure and severe mechanical stress. This specific flange features a Raised Face (RF) profile. The sealing surface is slightly elevated above the bolting circle, allowing the flange to concentrate all the bolt load onto a smaller gasket area. This localized compression creates an exceptionally tight, high-integrity seal designed to contain high-pressure liquids and gases safely.

Manufactured from premium forged steel, this 3-inch 900# blind flange conforms precisely to ASME / ANSI B16.5 dimensional and metallurgical standards, ensuring seamless, leak-free compatibility with standardized industrial piping networks.

Features & Benefits

• Class 900 Pressure Rating: Engineered to handle extreme internal pressures, making it suitable for heavy-duty oil and gas, petrochemical, and power generation applications.

• Raised Face (RF) Profile: The elevated sealing face concentrates gasket compression, maximizing seal integrity and eliminating the risk of high-pressure blowouts.

• Solid Forged Construction: Manufactured from high-strength forged steel to provide superior resistance against pipeline vibration, mechanical shock, and cyclic pressure fatigue.

• C: Perfect for blanking off pipeline terminuses or isolating valves, while allowing for easy unbolting and removal when future line expansion is required.

• ASME B16.5 Compliant: Machined to strict industry tolerances to guarantee a perfect face-to-face fit with standard mating flanges.

Specifications & Technical Details

Applications

This 3-inch Class 900 RF blind flange is a critical isolation component for heavy-duty industrial and surface operations. Typical applications include terminating massive high-pressure oil and gas pipelines, capping off unused manifold ports, securely isolating valves during maintenance, blanking pump discharge headers, and sealing pressure vessels for rigorous hydrostatic testing.

Quality Assurance

All our industrial flanges are manufactured from premium forged steel and subjected to strict quality control processes. Each blind flange undergoes rigorous dimensional inspection, precision face machining verification, and non-destructive testing (NDT) to ensure absolute structural integrity and defect-free sealing surfaces. Full material test reports (MTRs) are available upon request to guarantee full compliance with ASME and ANSI industry standards.

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