which formula should I use to calculate heat loss in piping?

[SaraChem]

I have a pump package and I need to calculate the heat loss in piping (suction and discharge) , suction piping (cold) and disharge piping (hot) also i am using a carbon steel pipe material SA106B

 

[mk3223]

May google for the pipe heat loss calculation program.
But, wheat is the heat source of the pump discharge piping as the suction pipe is cold?