New York Low Pressure Boiler COF Practice 2025 - Free Practice Questions and Study Guide

Mechanical or welded joints are appropriate for hydronic piping between steel tubing and fittings due to the nature of the materials and the conditions under which hydronic systems operate.

Mechanical joints provide a reliable connection that can be easily assembled and disassembled, making them ideal for situations where maintenance or adjustments might be necessary. They often incorporate gaskets or O-rings to ensure a tight seal, which is crucial in preventing leaks in piping systems where water or other fluids are transported at varying pressures.

Welded joints offer permanent connections that are robust and can withstand high pressures and temperatures typically found in hydronic systems. Welding creates a metallurgical bond between the tubing and the fittings, leading to a very strong joint that minimizes the risk of leaks and ensures the structural integrity of the system over time.

Using mechanical or welded connections ensures durability and reliability in hydronic piping applications, making this combination the preferred choice for those specific conditions.