Merit Brass 635-40 Threaded Pipe Flange 2-1/2 in SS316

Product Description

The MERIT BRASS 635-40 is a threaded pipe flange designed for use with 2-1/2 inch pipe in fluid handling and piping systems. Constructed from Grade 316 stainless steel, it delivers strong corrosion resistance in demanding environments including chemical processing, marine applications, and food-service plumbing. The flange has a 7 inch outside diameter and is rated at 150 psi working pressure. Four bolt holes are positioned on 5-1/2 inch bolt hole centers, with each hole measuring 3/4 inch. Licensed plumbers and pipefitters install this flange as part of bolted flange connections where threaded end entry is specified.

This threaded flange is suited for residential and commercial piping installations where stainless steel is required to resist corrosion from water, mild chemicals, or sanitary service media. The threaded connection allows direct engagement onto male-threaded pipe ends without welding, making it practical for retrofit work and field installations where open flame or hot work permits are restricted. It is commonly specified in process piping, water treatment, and industrial plumbing systems operating at 150 psi or below.

Key Features

• Grade 316 stainless steel construction for superior corrosion resistance in wet and chemical service environments
• Threaded connection type eliminates the need for welding during installation
• 150 psi pressure rating suitable for standard low-pressure piping service
• 7 inch outside diameter with 4 bolt holes on 5-1/2 inch bolt hole centers
• 3/4 inch bolt hole diameter for standard flange hardware
• Circular shape with uniform bolt hole pattern for consistent sealing and alignment

Compatibility

Designed as an OEM-style replacement or new-installation threaded pipe flange for 2-1/2 inch pipe systems rated at 150 psi class service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or ASME B31 piping code requirements. Isolate and depressurize the piping system completely before installing or removing any flange. Apply an appropriate thread sealant or PTFE tape to the male pipe threads before threading the flange into position. Torque flange bolts evenly in a cross pattern using a calibrated torque wrench to achieve a proper gasket seal without distortion.