This chart, from North Carolina State University, shows the amount of Steam Loss (lbs/hr) that can result from a leaking steam trap.
As you can see, a single steam trap with a hole even the size of a BB can cost thousands of dollars in steam loss. When multiplied over numerous traps and an industry-wide average of 5-20% leaking at any time, the losses can be very high, on the order of $60,000 annually for each 100 steam traps in a building/system.
An effective solution is to install a steam trap monitoring system, such as Armstrong’s SteamEye wireless steam trap monitors. For recommendations for the type of monitoring system that is best for you, contact the team at Campbell-Sevey.