Paddle Blinds Sizes and Dimensions

Blind flanges close piping openings and can isolate sections of a system for maintenance, testing, construction, or future expansion. They provide a bolted closure at a flanged connection. Selection should account for the required diameter, pressure class, material, face type, and applicable specification so the component matches the surrounding piping system and intended service.

A blind flange is a solid flange without a bore that blocks the flow path at a flanged piping connection. It is used for line isolation, hydrostatic testing, maintenance, and other applications where a secure closure is required. Blind flanges are selected according to dimensional requirements, pressure class, material grade, face type, and project specifications.

Twinco Industrial lists Paddle Blinds in sizes from ½" to 72" in diameter. Availability and suitability depend on the required pressure class, face type, material, and application. Customers can also request custom thicknesses for high-pressure applications. Providing the piping specification and required dimensions helps identify the appropriate configuration.

Paddle Blinds are available in pressure classes 150, 300, 600, 900, 1500, and 2500. The product information also lists API ratings up to 15,000. The correct rating should be selected against the piping design and service requirements, with attention to the applicable ASME or API specification and the required face configuration.

Available material options include carbon steel, stainless steel, alloy steel, duplex, super duplex, and nickel alloys. Listed grades and alloy families include A516 Gr. 70, A36, 304/316, F11, F22, F91, Inconel, Monel, and Hastelloy. Material selection should follow the project specification, operating service, and compatibility requirements.

Paddle Blinds can be specified with Raised Face (RF), Flat Face (FF), or Ring-Type Joint (RTJ) face types. The face type should match the adjoining flanges, gasket arrangement, and piping design. Confirming the flange standard, dimensions, pressure class, and material grade helps ensure the blind is suitable for installation and isolation.