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Expansion Joint
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12 years 7 months ago - 12 years 7 months ago #8122 by shri
Expansion Joint was created by shri
Expansion joint is used in underground piping valve pit.
Could somebody clarify the purpose.
Thanks
Could somebody clarify the purpose.
Thanks
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12 years 7 months ago - 12 years 7 months ago #6429 by Jop
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Replied by Jop on topic Re: Expansion Joint
Shri,
Your post does not give enough information for anyone to know what is going on and give you an answer.
Please be more descriptive about the situation. Tell us about the box, the line, the commodity, geographic location, the expansion joint, etc.
Your post does not give enough information for anyone to know what is going on and give you an answer.
Please be more descriptive about the situation. Tell us about the box, the line, the commodity, geographic location, the expansion joint, etc.
Do it once and Do it Right
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12 years 7 months ago - 12 years 7 months ago #6382 by shri
Replied by shri on topic Re: Expansion Joint
Jop,
This is for 44" cooling water supply and return lines running underground at a depth of around 2000mm below grade level. Plant Location is Saudi Arabia.
Non Metallic Expansion joint is placed adjacent to the isolation valve at the valve pit.
Thanks
This is for 44" cooling water supply and return lines running underground at a depth of around 2000mm below grade level. Plant Location is Saudi Arabia.
Non Metallic Expansion joint is placed adjacent to the isolation valve at the valve pit.
Thanks
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12 years 7 months ago - 12 years 7 months ago #6383 by Jop
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Replied by Jop on topic Re: Expansion Joint
Is it a bellows expansion joint (XJ)?
If so what is the face to face dimension of the XJ?
How many volutes does the XJ have?
These are real and valid questions that will confirm what I think is going on here.
Jop
If so what is the face to face dimension of the XJ?
How many volutes does the XJ have?
These are real and valid questions that will confirm what I think is going on here.
Jop
Do it once and Do it Right
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12 years 7 months ago - 12 years 7 months ago #6424 by shri
Replied by shri on topic Re: Expansion Joint
this is non metallic bellow expansion joint, Face to face dim around 500mm
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12 years 7 months ago - 12 years 7 months ago #6433 by Jop
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Replied by Jop on topic Re: Expansion Joint
Based on the information you have provided here is what I think is going on here.
44" pipe, a 44" valve in a Valve box.
The Engineers and designers were smart enough to realize that the valve would need maintenance or replacement someday. They were also smart enough to know that with the pipe being cast into the walls of the valve box (and being underground) there was no flexibility to spread flanges.
So! They allowed a gap of 500mm between one side of the valve and the connecting flange and hard piping. They then filled this gap with a rubber expansion joint. This allowed them to compress the joint to install or remove the valve when required.
Think about it.
44" pipe, a 44" valve in a Valve box.
The Engineers and designers were smart enough to realize that the valve would need maintenance or replacement someday. They were also smart enough to know that with the pipe being cast into the walls of the valve box (and being underground) there was no flexibility to spread flanges.
So! They allowed a gap of 500mm between one side of the valve and the connecting flange and hard piping. They then filled this gap with a rubber expansion joint. This allowed them to compress the joint to install or remove the valve when required.
Think about it.
Do it once and Do it Right
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