🔍 Key Concepts

• Water hammer in steam lines (what causes it and why it is dangerous) • Proper start‑up procedure for steam lines with drains and warming through • Role of drain valves and the importance of valve opening speed (slow vs fast)

💭 Think About

• What happens inside the pipe when you have slugs of condensate and you open a steam valve too quickly? Think about pressure surges and mechanical shock. • In an abnormal condition (water hammer just started), is your FIRST priority to keep heating the line, or to remove the cause of the hammer? • Compare which choices focus on getting rid of condensate safely versus those that might make the hammer worse.

✅ Before You Answer

• Which option removes condensate before you continue to admit full steam pressure? • Which option avoids suddenly changing flow conditions (no rapid opening or big lineup changes while hammer is occurring)? • Which procedure most closely matches standard practice: drain/vent low points, warm through slowly, then bring the line to full pressure.