What is the inspection interval for a boiler that is stamped with "HLW"?

A boiler that is stamped with "HLW" indicates that it is subject to inspection under specific regulations. "HLW" refers to "Hot Water Heating" boilers, which can be categorized for periodic inspection requirements based on their operation and usage characteristics.

The inspection interval for a boiler marked "HLW" is typically set at three years, meaning it must be inspected every triennial period. This schedule helps ensure safety and reliability in their operation, considering factors such as system pressure, temperature, and operational stress that can affect the integrity and performance of the boiler over time.

Choosing this inspection frequency aligns with industry standards and best practices aimed at maintaining the safety and efficiency of hot water heating systems. Regular inspections within this timeframe allow for the identification of potential issues before they become critical, thus preventing accidents and ensuring compliance with safety regulations.