Dear,
Factors 1.3 or 1.5 or 1.25 or 1.1 etc. is temperature correction factor included in hydro or pneumatic pressure determination.
Now why this is required to include ?
Because vessel will get operated at higher temerature at that time material will be weak. At ambient or test temperature material will be strong.
So to take effect of weakend material at operating temperature we proportiantely increases testing pressure.
It depends on allowable stress criteria we followed while detrmining allowable stress as per any code.
On Saturday, April 27, 2013 4:32:02 PM UTC+5:30, nishant wrote:
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Why hydrotest pressure is taken 1.3 times of design pressure? What is the criteria that fixes the term 1.5 times or 1.25 times, etc.???
Thanks in advance,
Nishant nair
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