Where is a steam trap typically installed in a boiler system?

• A. In the exhaust stack
• B. On condensate return lines and at condensate-producing equipment like radiators or coils
• C. In the building ventilation
• D. On fuel supply line

Answer: (B)

Steam traps are placed where condensate forms and must be removed without losing steam. They belong on condensate-producing equipment (like radiators or coils) and on condensate return lines. At the equipment, the trap drains away the condensate that collects as steam gives up its heat, keeping the heat transfer efficient and preventing water hammer. On condensate return lines, the trap allows the collected condensate to return to the boiler for reuse while preventing live steam from escaping with the condensate. Placing a trap in an exhaust stack would waste energy by venting steam; in building ventilation or on a fuel supply line, it wouldn’t serve the steam system’s function. That’s why the correct placement is on condensate return lines and at condensate-producing equipment.