FIRESAFE AND API 607
FIRESAFE AND API 607
(OP)
Hopefully somebody can help me answer this question. If it is necessary to use a fire safe ball valve (approved to API 607) on a gas tank as a second closure what approval is required for the 1st closure valve (internal foot valve) if any? If the the internal footvalve does not need to be firesafe what is the justification for it?
Thanks in advance.
Thanks in advance.





RE: FIRESAFE AND API 607
RE: FIRESAFE AND API 607
RE: FIRESAFE AND API 607
The justification might be required (or thought as) 'redundancy' in this case simply an extra added safety :- two closed valves in series are safer than one.
Apart from this and the comments from others above, I have one more remark:
as most accidents have an element of human error: two valves in series will not contribute to added safety if one of them are left permanently open...