Piping Insulation thickness Calculation

Hi

Can anyone guide how to perform "Piping insulation thickness calculation" for process piping. If I can see any sample calculation , it would be great?

The insulation type and thickness are scope of Process Engineer. Please check with the process department.

With all respect, I still am not in full agreement with Jop's post.

The process engineer based on design data decides whether insulation is necessary. The thickness is then calculated using Stephen Boltzmann law with following parameters:
a. Fluid temperature
b. The temperature expected at outside surface (insulation)

The first insulation calculated is minimum insulation thickness required and then the optimum insulation thickness is calculated using formula (mostly)= 1.25* Minimum insulation thickness.

Are these calculations performed by Pipers?

Because if there's any change in the above parameters, the insulation thickness will change and process engineer will be aware of it more than Piper.

And the tables will be standardized information that will indicate insulation thickness values (Rounded Off) in a Pipe Bore Vs Temperature Table.

Shri,

Process only provides design conditions for Piping and just tells the purpose of insulation (i.e. Hot or Cold).
It is piping metarial engineer's job to select the proper insulation thickness and proper insulation material.
For this we have Insulation specifications also for ready reference of piping designer.
this is what is being followed in my organization.

Thank You
Siddharth Jain

The piping insulation thickness is calculated based on the temperature of the fluid going through the pipe, the type of insultating material we are using. The usage of insulation also varies from one comapny to other as inspection og piping below insulation is very difficult. Genrally upto 60deg C companies do ot put any insulation. However if the temperature is above 60degC upto 75deg C a personal protection is provided in the form of cage where ever operators interface is there. If the temperature is such that insulation is required and the heat needs to be conserved only then insulation is provided. Also there are standards which refer to the thickness of insulation required.

The final answer should come from process as they are best placed to know and also control the process conditions. The insulation thickness should be marked on the line numbers and depicted on the P&ID.

Regards

Bhavesh