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recently I came across a question where I needed to calculate the capacity  of a pipe for which I had just od and weight. I normally use the simple formula that is id2 -od2 divided by 1029.4

this works for annular  capacity.

the same thing works for pipe capacity as id2/1029.4 if just pipe capacity is required but what if I don't have an id and just weight lb/ft.any one have any ideas?

thanks and regards



Views: 785

Comment by IX on April 9, 2013 at 5:49am

I am assuming that the pipe is down-hole or elsewhere otherwise you could caliper the ID. Engineerting toolbox has a formula that you need to work backwards to get thickness and then ID.


If the outside diameter and the wall thickness of a steel pipe is known, the weight per foot can be expressed as:


m = 10.68 (do - tw) tw                (1)



m = weight per foot (lbs/ft),  do = outside diameter (inches),  tw = wall thickness (inches)


Example - Weight of 4" Schedule 40 Steel Pipe

The outside diameter (do) of 4" Schedule 40 Steel Pipe is 4.500 inches. The wall thickness is 0.237 inches. The weight per foot can be calculated using (1) as:

m = 10.68 (4.500 (in) - 0.237 (in)) 0.237 (in)

= 10.79 (lbs/ft)


Comment by Khalil Ferris on April 23, 2013 at 12:48am

There are many manuals that have charts of the Id of the pipe based on weight

Comment by richard scott blackmore on July 24, 2013 at 10:59am

calculate volume using o.d. subtract total weight of pipe divided by 2750

2750 is the weight of a barrle of steel


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