EC Pagorogon,
The bottom bend just after the steam relief valve will experience the max. thrust force. So it is recommended to provide a rigid support at this point.All the vertical pipe length weight will be taken care by this support. A no. of guides can be provided in the vertical pipe depending upon the pipe length to provide the stability to the system.Spring support is normally avoided in such system because of vibrations, when pressure is released.I hope it will help.
Sneh Gupta
Stress Analyst
Fluor India, N.Delhi
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snehgupta