What is the maximum allowable pressure for a low-pressure boiler utilizing water?

The maximum allowable pressure for a low-pressure boiler utilizing water is indeed 160 psi. This specification is based on industry standards that define the operational parameters for low-pressure boilers. Low-pressure boilers are designed to operate within specific limits to ensure safety and efficiency in their operation. In this context, the designation of a low-pressure boiler refers to systems that operate at pressures of 15 psi and below for steam or 30 psi and below for hot water.

When the pressure of a boiler exceeds 160 psi, it may no longer be classified as a low-pressure boiler; rather, it could fall into a higher classification necessitating different design and operational criteria for materials, safety devices, and regulatory compliance. Understanding these classifications and their corresponding pressure limits is crucial for ensuring safe operation and adherence to local codes and regulations.

The choice of 160 psi reflects a widely accepted standard within the industry, ensuring that equipment and operational protocols are aligned with safety practices that protect both the users and the surrounding environment.