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# Suitable temp. for insulation calculation

## Suitable temp. for insulation calculation

(OP)
Hi
For insulation calculation which temp. should be used:
1- minimum ambient temp.
2- average annual temp.

and if you have any reference (such as standards or handbook)i will be thankful to tell me

### RE: Suitable temp. for insulation calculation

If the insulation is for heating purposes, use the minimum ambient temp, especially if freezing is a concern. If it is for cooling, use the maximum ambient.

Matt

Quality, quantity, cost. Pick two.

### RE: Suitable temp. for insulation calculation

If you are thinking about insulation for a building you should find a civil engineering forum, this is main theoretical and/or process industry

### RE: Suitable temp. for insulation calculation

Suggest approaching this by looking at the required plant availability.

Say the annual plant downtime is broken up into 5days unplanned shutdown, 10days annual maintenance. Of these 5days, we may assign say 4days for equipment breakdowns and other operating incidents, and leave one day for plant shutdown due to low ambient temp - excessive heat loss througn insulation.

1 day out of 365 = 0.27%

Then look at the tabulated data for daily min temp over the last 20years say, and find the daily min temp, below which the cumulative annual occurence is less than or equal to 0.27%.

It must be celarly shown that this excessive heat loss does lead to a plant shutdown due to high pressure drop, low operating temp or some other abnormality.

### RE: Suitable temp. for insulation calculation

You should get help from someone with experience in your office.

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