Pipe Strap as an anchor/line stop 1

[lilsam]

Hi everyone,

Please give me some information regarding the use of pipe strap support as an anchor or line stop.

Up to what pipe size is this pipe clamp allowed to use and also the maximum pressure?

Do you have any reference or documents stating the use of this support?

How to calculate the stresses and maximum forces of the pipe clamp?

Thank in advance...

Regards,
lilsam

 

[BigInch]

It is unlikely that a "strap" will act as a pipe anchor at any size.

It seems that you should find a pipe stress engineer and perhaps a structural engineer to design the supports.

In the meantime, you should have a look at the free pipe stress course and downloads available at this web site,

http://www.sstusa.com/freepipestress.htm

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com

 

[RossABQ]

If I understand the question correctly, pipe CLAMPS (the typical two-eared Grinnell type) are fine for line stops if used with appropriate lugs welded to the pipe. There is no explicit line size limit. The entire line stop assembly has to be designed properly, tho. (i.e., the attachment of the lugs to the pipe needs to be done properly)

 

[Zapster]

I agree with RossABQ. PFI (Pipe Fabrication Institute) has a paper that discusses the design of lug weldments:

I think it is, “Welded Load Bearing Attachments to Pressure Retaining Piping Materials”

http://www.pfi-institute.org/index.html

 

[JohnBreen]

Hi lilsam,

Your question should include information regarding the piping Code document to which you are required to design the piping system. Mandatory Code rules will address the issue.

Each type of pipe support (hanger) hardware is specifically designed to accommodate a particular type and magnitude of loading (forces and/or moments). Perhaps you could benefit from looking at the Anchor-Grinnell web site where you will be able to download their catalog and also download their hanger/support design manual.


Regards, John.

 

[JohnBreen]

Hi lilsam,

An additional thought or two.

A pipe clamp in and of itself can be neither an aanchor nor a line stop. As alluded to above, there must (as a minimum) be lugs welded to the pipe to approach the capability to stop longitudinal pipe movement.

Pipe hanger/support hardware is ALL load rated by the manufacturer. That is to say, every individual contiguous component that comprises the hanger/support assembly will be rated for the same loading. The manufacturer's catalog will provide these load ratings.

There is no "strap" terminology in the MSS SP-58 lexicon so the term does not convey any universal concept to be discussed. If you go to the Anvil-Grinnell catalog and ask questions here using the A-G terminology the community will better be able to speak to the question.

Regards, John.