what does schedule pipe mean? schedule 40, schedule 80 schedule, pipe, does, mean

f6gulftw

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

jwvdrill

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

[url=mailto:mbeychok@home.com]mbeychok@home.com[/url]


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ystone19

What is the difference between pipes SCH 40 and SCH 40S?
Kristian.

dlw2007g

The schedules that end in S (5S, 10S, 40S, & 80S) are for stainless steel pipe.??In MOST smaller pipe sized (14") sizes.

jmru

Can any one tell me the exact defination of Nominal Pipe

3why7saf

Nominal pipe size refers to the basic size of the pipe.??For example, a 2" nominal pipe is not really 2" in diameter.??Its typically larger by a tenth of an inch or so, but its refered to as 2" nominal for simplicity.??Its the same basis applied to lumber.??A 2x4 is actually 1.75" x 3.75", but the nominal size of the wood is 2x4

soft5why

i want to know how pipes specification are given in its nominal diameter & schedule? Which will have maximum outside diameter, a 20 mm extra strong,
or 20 mm heavy strong or 20mm double heavy strong??pipe?

19765198

Good luck with your tests.
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.

2safe23v

Dear sirs
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


[url=mailto:jorge@tecnicontrol.com.co]jorge@tecnicontrol.com.co[/url]

newsdril

Kulwinder, pipe schedule is independent of the OD.??For example, 2" sch 40, 80 or 160 pipe all are 2.375" OD.??The ID decreases though as the wall thickness goes up.

For 14" and larger pipe, OD = nominal pipe size.??For 12" and under, the actual OD > nominal pipe size.