I am doing some research for a paper on gas treatment and would like to know an estimate of the cost of a planned shutdown in a gas treatment plants. I don't need precise number but some "rule of thumb" estimates would be very helpful.
Taking an average size plant of around 150 MMSCF/Day that has de-sulpherization, de-humidification, mercury removal and condensate removal.
1/How often does a planned shutdown occur?
2/On average how long is the plant out of action including shutdown down and start-up?
3/What are the normal activities performed at a shutdown?
4/How many man days are involved including:
c/ scope of work,
d/ method statements,
e/ risk assessments,
g/ anything i forgot?
h/ performance of tasks for shutdown maintenance and startup