Merit Brass SWM687-12 3/4 in 316 Ss Socket Weld Pipe Union

Product Description

The MERIT BRASS SWM687-12 is a 3/4 inch pipe union manufactured from 316 stainless steel, designed for socket weld end connections with a threaded union nut. Rated at 150 psi, this fitting joins two sections of pipe while allowing future disassembly without cutting. The 316 stainless steel construction provides strong resistance to corrosion and chloride environments, making it a reliable choice in demanding piping systems. Licensed plumbers and pipefitters install this fitting in process, industrial, and commercial plumbing applications where maintenance access and material compatibility are critical requirements.

This union is suited for use in commercial and industrial piping systems where 3/4 inch socket weld connections are specified. Typical applications include chemical processing lines, marine plumbing, food service piping, and other installations where 316 stainless steel is required for corrosion resistance. The socket weld design accommodates standard pipe inserted into the socket before welding, producing a smooth internal bore with minimal flow restriction. This fitting is appropriate for installations governed by ASME or applicable pressure piping codes.

Key Features

• 316 stainless steel construction for superior corrosion and chloride resistance
• 3/4 inch socket weld x socket weld end connections for secure, low-turbulence joints
• Threaded union nut design allows pipe disassembly without cutting
• 150 psi pressure rating suitable for low-pressure process and plumbing lines
• Compact, single-piece union body with consistent dimensional tolerances

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3/4 inch socket weld piping systems requiring 316 stainless steel material grade at 150 psi service pressure.

Installation Notes

Installation should be performed by a licensed pipefitter or plumber in accordance with applicable ASME B31 pressure piping codes and local mechanical codes. Depressurize and drain the line completely before removing or installing any union fitting. Socket weld ends require proper socket depth fitment and qualified welding procedures prior to system pressurization. Inspect the threaded union nut and seat surfaces for damage before assembly to ensure a leak-free joint.