Flange tightening issues at -60°C
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Valve flanges at -60°C require cold tightening; cold-insulation construction cannot be carried out at the moment. What do people do in such situations? Should the system be cooled first, and then stopped to insulate the valve flanges after cold tightening? Or is it not necessary to use cold tightening at all, and cooling measures can be implemented directly?
I think cold straining should be carried out, and then insulation should be applied after that.
We will weld as much as possible to reduce the number of leakage points; the flanges are wrapped separately for easier handling in the future!
Do not insulate at the flange first; wait until cold tightening and hot tightening are completed before providing insulation.
After cooling and tightening, the flange valves will definitely freeze over; won’t the insulation effect then be poor?