what does schedule pipe mean? schedule 40, schedule 80
what does schedule pipe mean? schedule 40, schedule 80
(OP)
I am studying for the lubrication engineers exam and need to know more about "schedule pipe" what it means and what do they mean by schedule 40 and schedule 80





RE: what does schedule pipe mean? schedule 40, schedule 80
The pipe schedule refers to the pipe wall thickness. The higher the schedule, the thicker is the pipe wall. For example:
2-inch nominal size steel pipe: schedule 40 has a wall thickness of 0.154 inches and schedule 80 has a wall thickness of 0.218 inches.
4-inch nominal size steel pipe: schedule 40 has a wall thickness of 0.237 inches and schedule 80 has a wall thickness of 0.318 inches.
As you can see, the relationship between schedule and wall thickness changes with the
pipe nominal size.
Table 6-6 in Perry's Chemical Engineers' Handbook (Sixth Edition) provides the schedule thicknesses for steel pipe nominal sizes ranging from 1/8 of an inch to 30 inches. I am sure similar tabulations are available in other books as well.
Milton Beychok
mbeychok@home.com
Air Pollution Dispersion Modeling
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RE: what does schedule pipe mean? schedule 40, schedule 80
Kristian.
RE: what does schedule pipe mean? schedule 40, schedule 80
RE: what does schedule pipe mean? schedule 40, schedule 80
RE: what does schedule pipe mean? schedule 40, schedule 80
RE: what does schedule pipe mean? schedule 40, schedule 80
or 20 mm heavy strong or 20mm double heavy strong pipe?
RE: what does schedule pipe mean? schedule 40, schedule 80
This should be a little more definitive for you.
Pipe schedules indicate approximate values of the expression 1000 x P/S where P is the service pressure and S is the allowable stress, both expressed in pounds per square inch.
Here's a tip for you. When calculating the working pressure of pipe almost everyone forgets to take into account the standard manufacturer's allowance on wall thickness which is 12.5%. Therefore any calculation you derive should be multiplied by .875 to ensure a correct answer. That is of course unless you can guarantee that the wall thickness is consistently the nominal given or greater and in this economy that just isn't going to happen.
RE: what does schedule pipe mean? schedule 40, schedule 80
If You need more information about this subject.You can consult The Standard ANSI/ASME B36.10 for C.S, and 36.11 for S.S.
Table For schedule, wall thicness, weight of Pipes for each nominal diameter.
Regards
jorge@tecnicontrol.com.co
RE: what does schedule pipe mean? schedule 40, schedule 80
For 14" and larger pipe, OD = nominal pipe size. For 12" and under, the actual OD > nominal pipe size.
RE: what does schedule pipe mean? schedule 40, schedule 80
Pipe schedules indicate approximate values of the expression 1000 x P/S where P is the service pressure and S is the allowable stress, ...... the standard manufacturer's allowance on wall thickness which is 12.5%....
Can you explain it to me with an example: What schedule I need for a pressure of 50 bar or 750 psi?
RE: what does schedule pipe mean? schedule 40, schedule 80
Let's say you were using A-53B, Sh for this pipe is 18,900 at 500F.
Schedule = 1000 * P / Sh = 1000*750/18,900 or 39.68. You would use the next size commercial pipe which is schedule 40. If you included the standard 12.5% allowable variation in wall thickness, you'd have to choice a higher schedule than 60.
Note, this method is no longer used to actually size pipe, you should use the equations in the appropriate code to determine your minimum thickness, taking into account allowable manufacturing variations and corrosion allowances.
RE: what does schedule pipe mean? schedule 40, schedule 80
RE: what does schedule pipe mean? schedule 40, schedule 80
RE: what does schedule pipe mean? schedule 40, schedule 80
RE: what does schedule pipe mean? schedule 40, schedule 80
I was wondering if anyone knew who sells schedule 40 pipe to companies in the natural gas industry. As small as 1".?
Either a muanufacturer or supplier in Canada or the U.S.?
if you can't post a response here, please contact me at bravestar143@hotmail.com.
I would really appreciate any feedback!
RE: what does schedule pipe mean? schedule 40, schedule 80
You can try the two links below.
http://www.red-man.com/
http://catalog.natoil.com/cgi-bin/online/OC_product_catalog.jsp?BV_SessionID=@@@@1095670717.1042654589@@@@&BV_EngineID=cccladchdehhiekcfngcfkmdgmgdffh.0&category=General%2fTubular+Goods
In the future you may want to post your questions on a new thread not just add to an existing one. Your question will be reviewed by more people giving you more answers.
Hope this helps!
David
RE: what does schedule pipe mean? schedule 40, schedule 80
RE: what does schedule pipe mean? schedule 40, schedule 80
First, this is an obsolete method to size what pipe you need. That said:
Allowable stresses can be found in B31.3 and likely a bunch of other reference materials.
The values will vary depending on the grade of A53 you are using. A53 GrF for example at 500F is limited to 400F at a value of 13,800. A53 GrA is 16,000 at 500F.
316SS has a value of 17,900 at 500F. 316L has a value of 14,400 at 500F.