Merit Brass 435B-12 Blind Pipe Flange 3/4 in Stainless Steel

Product Description

The MERIT BRASS 435B-12 is a blind pipe flange designed to seal and terminate a 3/4-inch pipe end without allowing flow through the connection. Manufactured from Grade 304 stainless steel, it provides corrosion resistance in wet, chemical-exposed, or outdoor plumbing and process piping environments. The flange measures 3-7/8 inches in outside diameter and is rated for 150 psi service. Four bolt holes, each 5/8 inches in diameter, are centered on a 2-3/4-inch bolt circle. This part is installed by licensed plumbers and pipefitters working on flanged piping systems where a pressure-rated terminus is required.

The 435B-12 is suited for residential and light commercial plumbing, industrial process lines, and mechanical systems where a flanged pipe end must be closed off. Grade 304 stainless construction makes it appropriate for water, mild chemicals, and corrosive service conditions. Typical applications include capping unused branch connections, pressure-testing isolated pipe runs, and serving as a service access point on flanged systems. The 150 psi pressure rating supports standard ANSI Class 150 flanged piping assemblies.

Key Features

• Blind flange design seals pipe ends without flow passage
• Grade 304 stainless steel construction for corrosion resistance
• Rated to 150 psi for ANSI Class 150 flanged systems
• 3-7/8 inch outside diameter fits 3/4-inch pipe size
• 4 bolt holes at 5/8 inches diameter on a 2-3/4-inch bolt circle
• Circular shape with standard bolt-pattern layout for reliable sealing

Compatibility

Designed as an OEM-style replacement or new-installation blind flange for ANSI Class 150 flanged piping systems using 3/4-inch pipe.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and ASME B16.5 flange standards. Depressurize and drain the piping system fully before removing any existing flange or installing this blind flange. Use appropriate gasket material between mating flange faces and torque bolts in a cross-pattern sequence following the system designer's specifications. Verify that the service pressure and fluid media are compatible with Grade 304 stainless steel before putting the assembly into service.