By ASME code, what is the minimum size for water column connections?

According to ASME code, the minimum size for water column connections is indeed 1 inch. This specification is established to ensure proper flow and accurate measurement of the water level within the steam boiler or similar equipment. A 1-inch connection facilitates adequate water flow to allow for reliable operation and monitoring, reducing the risk of pressure fluctuations or inaccuracies in level readings that could affect the safety and efficiency of steam generation.

Connections smaller than 1 inch may impede the flow and potentially lead to operational issues, making the 1-inch minimum a critical standard for safe and effective system management. It helps prevent blockages and ensures that any water level instrumentation performs correctly, thus maintaining safety and operational efficacy in high-pressure environments. This is particularly important in high-pressure systems where precision and safety are paramount.