May i ask how to calculate the length of extended bonnet for cryo valves??
Per BS 6364 & MSS 134:
The length of the extension shall be sufficient to maintain the stem packing at temperature high enough to permit operation within the normal temperatre range if the packing material.
These...
hi, i'm currently researching LNG cryogenic service valve...may i ask the following questions....
1. why the industry practice is using ball and butterfly valves in LNG ??
2. why most of the LNG cryo valves are soft seated ball valve and metal seat triple offset butterfly valve??
3. when we...