Hai all,

plz clarify.

1.The role of Ambient temperature(Special Execution parameter) in the Underground piping?

2.What is temperature will give at underground portion.(Design Temperature is 93 deg C).

3.How to model the PIG Launcher fixed support,Sliding Support (While analyzing huge load came at fixed support, so foundation of fixed support also very huge and Plz note that i considered underground anchor block also).

Thanks in advance

The expansion of the all kind of piping is relative to the ambient temperature and the maximum operating temperature.

The temperature in the soil input is the differantiel temperature between the pipe wall and the soil, and used in the calculation of virtual anchor length.

The third on is directly related to your piping and support arrangement. I have not heard the use of fixed support on the pig louncher in parallel to the axial direction of attached piping.

If you mean it as underground piping anchor block, I would not recomment to use anchor blocks either if you can organise the above ground piping to take the large thermal expansion introduced by the buried piping to the pig louncher. Additionally the size of anchor block may get very large, and you may start thinking of the settlement of the anchor block.
I know there are several companies require anchor block to take the forces which is transferred by the axial expansion of piping sometimes reasonable, in most cases for no reason. You need to differentiate it, and eliminate if there is no perfect reason.

Hope it helps.

Ibrahim Demir