If water hammer develops while opening the valve in a steam line, which of the following actions should be taken?
• 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)
• 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.
• 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.
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