We have a CASE to be studied as follows:

1. An un-insulated piping system connected to equipment having service temperature of maximum + 60°C.
2. Piping system is exposed to atmospheric condition as the system is un-insulated, above ground and outdoor installation.
3. Black body metal temperature due to solar radiation is predicted to be maximum +85°C as per furnished data.
4. Winter minimum dry bulb temperature minus 3°C.
5. Climatological data.
Month Mean Mean Monthly Daily
Daily Daily Mean°C Variation
Max°C Min°C of temp. °c
January 18.4 7.9 13.1 10.5
February21.0 8.6 14.9 12.4
March 25.6 13.3 19.5 12.3
April 32.2 19.0 25.6 13.2
May 38.2 24.6 31.7 13.6
June 44.0 27.6 36.4 16.4
July 45.6 29.6 38.2 16.0
August 45.2 28.4 37.3 16.8
September41.5 24.9 33.7 16.6
October 35.5 20.6 28.1 14.9
November26.5 15.0 20.7 11.5
December20.0 8.3 14.0 11.7

6. What temperature load conditions are to be considered for the Analysis ? Is it

i. 21.1°C to 60°C
(or)
ii. 21.1°C to 85°C
(or)
iii. 21.1°C to minus 3°C
(or)
iv. minus 3°C to 85°C
(or)
v. Any other combination and / or range of temperature condition.

We will request your views on URGENT basis.

Regards

Manivannan
Pipe Stress Engineer-ICD
Heavy Engineering Industries & Shipbuilding Co.
PO Box : 10155;
Shuaiba-65452
State of Kuwait
Fax : 00965 326 2142
Mob. : 009656765627
E-mail : psmani@heisco.com