Hello,

Just a guess. Maybe it's a friction driven load. What's the pipe size and is it liquid inside the pipe?. Check your pipe thickness and all the basic input first. You can try to re-model from scratch. Are there any special components in your model. Check your boundaries also. Sometimes when I want to troubleshoot a model I will start from simple model first and check each result as I input more information in the model. Maybe in this way you can track which is causing that 150KN sustained.
Anyway, as everybody suggested it's better if you give more info. of your piping system.
I'm also interested to know what's causing that huge load in sustained in the axial direction.

Cheers!!