Introduction to Seven Connection Methods for 304 Stainless Steel Water Pipes

Introduction to Seven Connection Methods for 304 Stainless Steel Water Pipes

Stainless steel water pipes have seven connection methods: press-fit, push-fit, welded, grooved, socket-welded, threaded, and flanged. Below is a detailed introduction.

Press-Fit

Press-fit connections for stainless steel pipes include single press-fit and double press-fit. Using a hydraulic clamp, the fitting is compressed onto the pipe, with an O-ring providing watertight sealing. This method is simple, highly leak-tight, and permanent (non-removable once crimped).

Push-Fit

Push-fit connections are even simpler than press-fit. The pipe and fitting are joined by just inserting and twisting, enabling quick assembly.

Welded

Welded connections use fusion welding for high joint strength. However, quality heavily depends on the welder’s skill and is difficult to consistently guarantee.

Grooved

Grooved connections use a tightened nut to axially compress the expansion ring against the stainless steel fitting, with a tapered sealing ring ensuring watertightness. Installation and disassembly are convenient, but forged clamps are costly.

Socket-Welded

The stainless steel pipe is inserted into the fitting, then argon arc welding fuses the pipe and fitting into one integrated piece. This connection is highly reliable and requires virtually no maintenance.

Threaded

Pipe and fitting are tightened like a screw, with male and female ends joined directly. It allows tool-free installation, being simple, fast, and convenient.

Flanged

Two flanged stainless steel fittings are connected by tightening bolts. This mature method provides high strength and pressure resistance and is removable, but at a relatively high cost.