Hello
i know the allowable load on the nozzles and allowable vertical load(weight)
and also about lateral forces ,
but i dont now how to calculate allowable axial force on a pipe?
i mean what is the allowable axial force in a pipe run,when expansion occur , it can increase it,
Thanks for your replies

more info:

i didn`t have enough space for developing the loop for line with 130 feet lenght,so i fixed the end of pipe,for unwanted displacment , about 30-40 cm displacement in the end of line(some meters before the end,it will be weld to support),line has 200 meter length(130 feet)

if i anchore the end of pipe it makes force, so some meter before the end of pipe i fixed it(with lim restraint)
now displacements are not exist but the axial force is appeared,
now i have to now the allowable axial force!

Please do a little search on axial restraints and you'll find plenty of info on this forum.
The maximum axial stress depends on the piping code you're working with. Different codes have different combinations for expansion stresses, so check the code you're working with to see the stress combination. Keep in mind though that even if the stresses are correct according to the code (deformation due to hot expansion stresses can be allowed) a displacement of 30-40 cm can occur in serious pipe damage. And there is an even more important thing to keep in mind.
You're saying that you have about 30-40cm displacement at the end of the line. That should result in very high axial forces. Can you make a support strong enough to withstand these forces?

Thanks
i`m sorry it is 30-40 mm not 40cm, 40cm is a huge displacment and makesa big force,and its totaly wrong.

without loop,it comes about 70 cm but my desined loop take its disp. ,
now it only has about 40 mm=4 cm,and not in the nozzle side, in the end of the line, but i dont know what`s the next tie in,and how connect to it,(with or without leg)
so i assumed it`s fixed there(wrost case)
and in my wrost case (expansion) it pass all the stesses and all the disp,
the only thing is matter that 4cm and its axial force,
also it passed all other thingsinother cases (stress,disp,force,...)


and the code is b31.3, i will check te code for max allow. axialforce,
i hope i find it,if not i must check my university books,"

i think the weld on the support is important and i must check it and the next way is to let line freely expand without any axial support.

i checked the site before posting but i didn`t find my answer
thanks again