Raised Face Blind Flange

QS Flange: Wuxi Raised Face Bl Flange

Blind flange with a raised face that blanks off a pipe end or vessel opening, with the facing, size and class agreed per inquiry.

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One-Minute Overview

Blind flange with a raised face, bolted over a line end or vessel nozzle.
The solid plate stops flow outright where a valve would only throttle it.
The raised face presses the gasket into a narrow, high-pressure band.
Size, pressure class and material are confirmed per inquiry.

A raised face blind flange is a solid disc bolted to a mating flange to close a pipe end, a spare header branch or a vessel opening. The raised face is a machined annulus standing slightly proud of the rim, so bolt load lands on the gasket instead of being spread across the whole face. That is what turns a plate over a hole into a dependable dead end.

Because there is no bore, the plate takes the full pressure load across its thickness, while the raised face squeezes the gasket into a narrow band around the bore of the mating flange. Sealing therefore depends on bolt load and face finish rather than on plate area, and the joint tightens at a fraction of the bolt force a full face gasket would demand. The facing is machined to suit a standard raised face gasket, and the bolts are brought up in a star pattern so the plate is not tipped on its seat.

Uses run from closing spare branches before tie-in and isolating equipment during maintenance to sealing tank and vessel openings that may later take a nozzle. A blind also doubles as a safe barrier when a section is opened for inspection, because nothing can drift through a solid plate. Facing type, size and pressure class are agreed per inquiry, and detail drawings for a specific opening are available on request.

FAQ

Q1. What is a blind flange actually for?

It is the solid end of a piping system. Instead of a valve that throttles, it closes the opening completely: at the end of a header, on a branch left for a future connection, or over a vessel nozzle during maintenance. Nothing passes a solid plate, which is why a blind is trusted for isolation before a section is opened.

Q2. Why a raised face instead of a flat face here?

Because the raised face concentrates the bolt load. The narrow annulus presses the gasket hard around the bore, so the joint seals with far less bolt force than a full face pattern, and the plate stays flat instead of bowing under torque. It also matches the raised face on the mating flange, which is what a standard joint expects.

Q3. How do I keep the plate from distorting when I tighten it?

Bring the bolts up in stages on a star or cross pattern, and stop before the plate starts to bow. Clean faces and a gasket of the right thickness do most of the work; over-torquing one side to chase a leak usually makes the leak worse by tipping the disc. Check the joint again after the first heat cycle, when everything has settled.

Q4. How long will production take?

Standard sizes are typically ready within 30 days, and in-stock items ship immediately. Larger or custom orders get a confirmed date per order, because the schedule depends on quantity, material, the bolt pattern you specify, and how busy production is at the moment you order.

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