Montemayor:
I also hope I get a chance to work closer with these equipments.
Montemayor, you're the man - Really. I always look forward to reading the threads that you are involved with.
regards,
C
Dear All,
Sorry but that was really all the information that I had regarding the piping system at hand. And I was simply quoting the friend that works at this plant. Anyhow, thanks for the replies. Unfortunately, I have no access to the relevant documents and won’t be able to get a hold of...
This is really a troubleshooting question:
A personal friend who works at this plant brought this up in a casual conversation and made me curious as to what can be done about it.
A piping system connected to a reciprocating compressor which runs at a constant speed of 427 RPM with 2 pistons...
hookem,
thanks for your input. Most likely my sources in the office are not correct about the saddle being fully anchored. like I told 'Elvie', I still haven't seen any relevent drawings but slot holes will certainly change everything.
thanks,
C
Elvie,
If "slot holes" are used for the saddle, then I rest my case. I still haven't seen the manufacturer's dwgs of this specific pig receiver. I found an older drawing but the detail of the saddles resting/sliding on conrete pedestals is not shown.
I asked around 5-6 people in our office...
Hi Gents,
Suppose I have an Underground oil pipeline which is anchored (with an anchor block) just before coming out of the soil. The Above-ground portion is directly connected to a "pig receiver" which I am told has a fixed saddle.
I am not comfortable with this arrangement because the...
Hi there,
If only turbulence is your concern, you can always ask for a bellow with a "liner". For metallic bellows, liner is inside the bellow. It is actually a thin-walled pipe (prohibiting direct flow against the inner wall of the bellow) welded to the assembly only at one end. That is why...
11000- please take note of the following, presuming you really have to use a flexible joint:
1)it is important that you provide the joint manufacturer with correct data concerning the connected pipe dia., fluid content, design temperature, design pressure, desired overall length of the joint...
stressguy- I am quoting you "....have, seen cases with a hot piping system and a relatively long vertical rise to the elbow requiring that the spring have a heavy cold setting so that the nozzle load stays within the allowable when that vertical rise expands and causes the load to ....". I...
carthago,
You're right on. That is pretty much where we're headed. I am trying to obtain the original stress file rather than model the whole system all over again. As a first step, I'll have to release the pipe at the connecting node to the compressor nozzle at cold condition and see if the...
agreed CRG. I know it is awkward and I was really looking for a generally applicable reply. It is almost impossible for me to provide you with all the design calculation details and give you a perfectly clear picture of the situation.
What I know is that the design calcs (stress anlysis)...
Hi guys,
here is the situation:
The process plant construction is completed. All equipments, pipes and relevent supports and Springs are in place. PLANT NOT IN OPERATION YET. At this stage, supports are basically bearing the Dead Load of the piping system.
The inspector arrives at the site and...
Thanks again, bvi. I'll be careful with CAESAR. But from what I remember reading in CAESAR manuals a few years back, thermal expansion induced displacements of buried pipes are controlled by the Spring model simulating soil resistance (based on shape, friction, soil active & passive resistance...
Thanks for the references you pointed out. I will have to do some reading on my own. So if I understand "bvi" correctly, "virtual anchors" have to be determined based on personal engineering judgement. I know CAESAR II buried pipe modeler has an "iterative process" of establishing the virtual...
Are we always required to place an ANCHOR BLOCK at Above Ground (AG; hereinafter)to Underground (UG; hereinafter) transitions? I am assuming in order to completely isolate the movements of AG piping from UG piping, I would always have to recommend an Anchor Block. However; from what I have...
Thank you guys. At least now I have an idea of what the advantages and pitfalls are in using either of these methods. And thank you Dave Simpson for putting up your site. I'll definitely look it up.
much obliged
Dear gents,
I have not come across any work instructions or specs in our office establishing a guideline on "deciding when one should consider testing a piping system or pipe line by Hydrotest vs. Pneumatic Air Test?" or any other method for that matter. Can anyone direct me in finding the...
