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TOPIC: How to set standard spacing

5 years 5 months ago #8379

  • Moga
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Dear Piping Experts,
Please advice me how to set standrad spacing and to check clearance for expansion.

Re: How to set standard spacing 5 years 5 months ago #7004

  • Jop
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Normal pipe spacing in a pipe rack is:
Flange (O. D.) of largest line to Pipe (O. D.) of second line plus 1 inch space plus insulation thickness (on the pipe and/or the flange if any).

Extra spacing for expansion is required when the pipe turns a corner but effects the spacing of the whole line. Here you take the distance from the Anchor to the turn, times the coefficient of expansion of the pipe material. This results in the total amount of expansion (growth or movement) for that length of pipe. You add this movement to the normal pipe spacing defined above.
Do it once and Do it Right

Re: How to set standard spacing 5 years 5 months ago #7007

  • Moga
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Dear Mr. Jop,
Thank you for your explanation. Could you explain also about how to set allowable expansion without increasing line spacing?

Re: How to set standard spacing 5 years 5 months ago #7008

  • Jop
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Moga,
"to set allowable expansion without increasing line spacing?"

Example: 300 feet (100 meters) long pipe run @ 300 degrees F (149 C)

Place the Anchors at the Pipe support nearest the two ends as possible, add a loop in the middle of the run and add Guides at every other Pipe Support.
Do it once and Do it Right

Re: How to set standard spacing 5 years 5 months ago #7010

  • Moga
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Mr. Jop,
I am sorry, I was wrong. I mean how to find out the value of allowable movement without increasing line spacing? I have 700’ long pipe run 4” S.S. @500°F – 2”IH. There is 16" standard line spacing at the right end. To find the maximum distance of the anchor from the right end is by deviding the allowable movement by the coefficient of expansion. How to find the value of this allowable movement? Thank you so much.

Re: How to set standard spacing 5 years 4 months ago #7053

  • AndyP
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lease advice me how to set standrad spacing and to check clearance for expansion.
Hi, look at the http://www.piping-designer.com/Category:Pipe_Spacing_Datasheet
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