(Winter protection) How should steam tracing pipes be handled after they are taken out of use in winter?
Thread Content
How do people design the steam tracing pipes in front of centralized traps? Since the tracing is interrupted after shutdown in winter, a dead zone for condensate forms in front of the traps; if this condensate is not removed promptly, it can freeze and block the pipelines. How do you address this issue in your designs?
Previously, netizens of Haichuan said it could be done using compressed air.
When condensate accumulates in the heat-tracing pipeline, if it is a carbon steel pipeline, air will enter it after prolonged disuse, leading to corrosion of the pipeline. Generally, factory air is used for purging until no water can be discharged from the location, and it is advisable to keep the pipes dry.
Emit directly at the lowest point, use wind to blow it away, and ensure there is no accumulation of liquid
Fear of corrosion; stop using nitrogen blowing for extended periods of time
Compressed air purging; nitrogen displacement over an extended period of time
Compressor purging, long-term nitrogen protection
During winter shutdowns, the steam tracing pipes must first have any excess steam removed from them, after which they can be purged with instrument air for a period of time.
We first allow natural evacuation, then perform air purging, and finally nitrogen sealing.