Dear All,

I've been trying to find a link or a previous thread in this forum where it references maximum loading/forces that an axial stop or guide can accomodate.

Can anyone please guide me on this?

A lot of companies out there have in house standards for pipe supports or copies that have been brought along over the years and the max loads on axial stops & guides have already been calculated.

I have a situation where the loads on my guides and stops have exceeded the allowable and i would like to do a quick check to verify that the supports can still accomodate the new loads...

I am aware that i can introduce flexibility in the guides/stops and it may reduce the loading, however i would like to err on the conservative side of things and i would like to do the check.

I would like to hear you thoughts on this.

Thank you.

A generalised statement in your case would not be wise. The allowable loads on guide/stop members largely depends on the sizes of members used in fabricating the support. And if it is a clamped type of arrangement for a high temperature line, I'm afraid to say but the allowable which I've encountered are quite low.

If you want to check the allowable for your support,take help from Civil/Structural guy & ask him to run a Stad calc.

Or else, you could also try your hands on FE based software such as Nozzlepro.

If you would like to have general numbers for the loads, let me know the size you're looking for.

Hope this helps.

It's a bad idea to depend on a standard table for restraint capacities unless you know the assumptions it is based on.

The biggest issue is the local stresses that the restraint imposes on the pipe wall, and that is going to vary based on the size of the line and it's effective wall thickness.

i would suggest you to to take 30% of allowable load of Pipe shoe (which has been providede by the vendor inline with Size nad temeprature) for your axial and latteral support as per normal practice (It may change company to company)

hi PIPER_TAN
one of thumb rule is , take anchor load as 5*D kg, where D is nominal bore in mm, say for 6'' line anchor load will be 6*150=900kg.
and if load is more than that, then u may have to consider local stress of pipe
guide load can be taken as 30 % of vertical load.


With best Regards

Nitin Lonkar

nitinlonkar@rediffmail.com

I would recommend, if you are using for example EN 13480, not to forget that if the line is a PED line I, II or III, supports are classified S1, S2 or S3. Depending on the classification of the supports it is compulsory to keep records of support calculation, or to send the calculation of supports to the notified body. So, as it has correctly been written here, in case you use support standards you shall know under which conditions the allowable loads are valid.

Corrado Vannella
www.vannella.com