maximum load on the pipe penetrate the concrete and puddle flange design

[rudiawan .]

dear friend ..
we have the project which the 30 inch pipe penetrate to the wall of sea water intake basin.
The concrete wall thickness is 750 mm
we need to get the allowable maximum load on this point (pipe that penetrate to the wall)
is there any standard for our reference
if using puddle flange, is there any typical reference

thanks in advance

 

[LittleInch]

The issue is one of thermal expansion where the wall is essentially an anchor block. So if you have any thermal expansion then your forces can be huge.

Pipeline codes cover this.

But if not then just set it into the concrete.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[MJCronin]

This is a rare circumstance where I (somewhat) disagree with LI ... If you simply set the piping into the concrete it will only last for a short time with out eventual leaking ...

The proper way to make a long-lasting installation is to install a coated pipe-sleeve and then a "link-seal" mechanism between the pipe and sleeve. This will, of course, be more expensive than simply putting the pipe into the wall

Link-seal mechanisms have been around for nearly 70 years and can be tightened in the field if there are problems

https://kerr-engineering.com/wp-content/uploads/2019/01/GPT_1-8-Link-Seal_11.2018_LR.pdf

Magically, there is no one "maximum loading" that we can give to a CAD designer covering 30 inch piping penetrations

MJCronin
Sr. Process Engineer

 

[LittleInch]

MJC has a better solution.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[HTURKAK]

The picture implies a sea outfall rather than sea water inlet. Will you provide more info . ? What is the reason to get allowable maximum load at penetration to the wall?.The common pipe materials for saline water for this size are (HDPE , RTR ..) The pressure at ( inlet or discharge ) is zero and substantial load will not develop at connection.
The elbow and coupling material implies to be DI or coated steel . Is this true ??
You may need puddle flange ( water stop to increase leakage path ) or link seal pipe sleeve to get water tight joint . But in your case , you do not need water tightness .






Use it up, wear it out;
Make it do, or do without.

NEW ENGLAND MAXIM

 

[rudiawan .]

hi hturkak..
thanks for your respond,
this pipe basiccaly connect from sea water intake, which the distance is about 5 km
the pipe is layed on the sea bed and provided with concrete weight for some distance.
The pipe material is HDPE
what we concern is when we simulate with seismic case and the load at this pont very huge, that is why we concern about maximum load

 

[HTURKAK]

Acc. to your explanation, the PL is laid on sea bottom ( at least the last 3-4 km is not buried , probably saddle weights used for bouyancy and fixing ).
With this set up, it is not reasonable to get high seismic effects. I bet your model and calculation do not reflect the real behavior.

I will suggest you to look;

- Subsea Pipeline Design,Analysis, and Installation (by Qiang Bai, Yong Bai)
- Subsea Pipelines and Risers (Ocean Engineering) (2005)
-

https://www.americanlifelinesalliance.com/Products_new3.htm#WaterPipelines

According to the grace of God which is given
unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. . . .
I Corinthians 3:10

 

[LittleInch]

Then don't anchor the pipe but let it move.

Or make the puddle flange in a pocket with some allowance for movement.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.