Pipe Schedule vs Class 1

[junfanbl]

Can somebody please enlighten me on what exactly the differences are between pipe schedule and class? Also, how does that effect the weight of pipe/fittings?

Is there a way to convert the class of a pipe to schedule for the sake of getting a fittings weight?

Thanks.

 

[pennpiper]

"Pipe Schedule"- Has to do with the thickness of the Pipe wall.
Example: Sch 5, Sch 10, Sch 40, Sch 80, Sch 120, Sch 180 etc
-
"Class" Has to do with:
a) the Rating for Flanges.
Example Class 150, Class 300, Class 400, Class 600, etc
or
The Rating of Screwed and Socket Weld Fittings.
Example Class 2000, Class 3000, Class 6000

Sometimes its possible to do all the right things and still get bad results

 

[MFJewell]

This may help you out.

 

[JGard1985]

@ MWJewell.....

Wow! Thats alot of compiled info

Jeff
Pipe Stress Analysis Engineer

http://www.xceed-eng.com

 

[LittleInch]

"Is there a way to convert the class of a pipe to schedule for the sake of getting a fittings weight?"

Not directly no because the two are not directly related.

As well as the impact of pressure, you also have material type, grade, temperature, corrosion allowance, fluid contents etc.

This is why for most projects you will find a document with various titles , but commonly the pipe spec(ification) which for each pipe code as detailed on the P & ID and the line list, a set of dimensions and listings for a variety of sizes.

Fittings (assume you mean flanges, tess etc?) will change a little or a lot dpeneding on what it is.

Most of the weight of a flange e.g. is in the flange body itself whereas a tee is directly related to pipe wall thickness. A valve weight is almost wholly related to pressure class.

MFJ - Nice spread sheet!

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