Is it possible to take concession for the reduced thermal expansion movements or reduced stresses due to elastic axial compression resulting from support friction forces?

You are a foolish person if you do so.. friction is not a effect which can be controlled and does not yield itself to be a repeatable number... but go ahead and take credit for it so that a more credible person will get the contract to fix up your inferior efforts.

John,
I agree 110% with your second statement but disagree 110% with the first and third.

The original post is just the sort of wizard weeze you need to make the numbers work and demonstrate how you can make the calcs work where lesser pipe stress engineers are only able to find problems.

Remember, there is no such thing as rust, rain, dirt, weld spatter, misaligned supports, stiction and all those other nasty little practicalities in hyperspace.

Best Regards

Forest Gump... Friction is as friction does"

I felt this forum is for discussing the issues if one have some problem or some ambiguity. It is unfortunate that my friend used the forum to antagonise just for the sake of proving himself, which a sensible person would normally refrain from. I would like to inform that the context has been taken from one of the Stress analysis design basis from highly reputed Indian consultancy. The context was not clearly understood and wish to have some opinion

I felt this forum is for discussing the issues if one have some problem or some ambiguity. It is unfortunate that my friend used the forum to antagonise just for the sake of proving himself, which a sensible person would normally refrain from. I would like to inform that the context has been taken from one of the Stress analysis design basis from highly reputed Indian consultancy. The context was not clearly understood and wish to have some opinion

It appears that Friction resistance is looked at reducing the thermal movements and thereby reducing the stresses.

Note that "Friction" is a transient phenomenon and will not help once resistance is overcome.
That is why all the Pipe Stress Peers recommend a "friction" and " no-friction" run to estimate its effects.

Again, one needs to judge from your actual model and relative sizes one is working with. A small bore line thermal forces may be too small to move a Large Bore line to which it is connected.