Pipe Hangers
Pipe Hangers
(OP)
I have to design secondary members to support pipes and their hangers. I stumbled upon the fact that there may be some special design consideration for the allowable stresses. Apparently, MSS SP58 (Manufacturers Standardization Society) requires 16.6 ksi maximum allowable bending stress when designing the secondary support members.
Is this correct and are there other requirements that I should be aware of?
I do not have a copy of the publication mentioned above. It is $95, and I do not know if it is worth buying.
Any info will be helpful.
Thank you.
Is this correct and are there other requirements that I should be aware of?
I do not have a copy of the publication mentioned above. It is $95, and I do not know if it is worth buying.
Any info will be helpful.
Thank you.






RE: Pipe Hangers
Have you asked him for this information?
RE: Pipe Hangers
Do you know if this an actual requirement?
Do you know why it is 16.6 ksi specifically?
Do you have any other information on possible design restraints imposed by that code related to allowable stresses, etc?
RE: Pipe Hangers
I don't know the parameters or the requirements for the specific design (e.g. seimic, loads imposed, etc.), so I can't give information. As far as I know this is not a requirement, however, if specified by the Mech. Eng., it should be followed. SP-58-2002 will have the information that can point you in the proper direction, so in that respect I recommend you obtain a copy.
http://www.mss-hq.com/
RE: Pipe Hangers
My understanding of MSS SP-58 is that it establishes fabrication, design and inspection criteria for standard types of pipe hangers and components.
It does have some guidelines for reduction criteria for stresses based on thermal (service temperatures) considerations for the hangers and components.
Unless the 'secondary support' members are being affected by temperature variations outside of normal creep considerations (i.e steam lines), I think that the appropriate (assuming steel of some sort) steel and building code requirements for bending should apply.
Hope that helps more than confuses
talmage
RE: Pipe Hangers
RE: Pipe Hangers
RE: Pipe Hangers
1. Based on what you said, it is obvious that the primary members (steel beams and girders and the concrete walls) are governed by the material codes (AISC and ACI). No problem here.
2. Most likely, the rods and angles would be governed by the piping code.
3. The gray area is if the channels are governed by AISC or the piping codes. Not 100% sure which way to go here.
To a degree, you have helped clarify the situation. Can you take it a step further by letting me know if the piping codes address the latter two issues?
To whatever extent the issues are addressed by the piping code, I do not have the direct means of reviewing it for myself. I wish I could, but I do not have any piping codes.
If you can help, I would appreciate it. I could get you my fax info if necessary.
RE: Pipe Hangers
The channel to which the trapeze is attached is a structural support, governed by the structural code.
The piping code limits the allowable stres in pipe supporting elements to the piping code allowable stress.
RE: Pipe Hangers
RE: Pipe Hangers
if it is not too many pages to bother you, and it isn't too cumbersome, could you please fax it to: 302-996-9537
Thanks in advance!
RE: Pipe Hangers
RE: Pipe Hangers
Steam, condensate and mostly water (chilled) are running through the pipes.
The double channel supports are steel.
RE: Pipe Hangers
RE: Pipe Hangers