The desuperheater leakage test sample cooler branch line is associated with which steam main?

The desuperheater leakage test sample cooler branch line is associated with which steam main?

• A. 600 PSI steam main
• B. 150 PSI auxiliary steam main
• C. 300 PSI steam line
• D. 100 PSI steam line

Answer: (A)

Desuperheaters sit in the main steam path, on the high‑pressure line, to cool the steam before it goes to equipment like turbines. The leakage test sample cooler branch line is taken from that same high‑pressure main so you can safely sample and check for leaks right at the source of the desuperheater without tapping into lower‑pressure or auxiliary lines. That’s why the 600 psi main is the correct association—the desuperheater is part of the high‑pressure steam system, not the lower‑pressure auxiliary circuits. The other mains (auxiliary or lower pressure lines) serve different purposes and outlets, so they aren’t where the desuperheater leakage test branch would be placed.

Desuperheaters sit in the main steam path, on the high‑pressure line, to cool the steam before it goes to equipment like turbines. The leakage test sample cooler branch line is taken from that same high‑pressure main so you can safely sample and check for leaks right at the source of the desuperheater without tapping into lower‑pressure or auxiliary lines. That’s why the 600 psi main is the correct association—the desuperheater is part of the high‑pressure steam system, not the lower‑pressure auxiliary circuits. The other mains (auxiliary or lower pressure lines) serve different purposes and outlets, so they aren’t where the desuperheater leakage test branch would be placed.