3 replies to this topic

[Light]

What do the pressure ratings i.e. 150#, 300#, 600# in a Pipe Class indicate? What are their units?

 

Why do we use pipe class? What is its application for a process engineer?

 

Do we get the pipe schedule from the pipe class? And suppose we have a 40 sch pipe of 8'' dia pipe. Does it correspond to one single thickness, or there can be more than one?

 

Regards.

[Zauberberg]

There have been a lot of threads on this subject. I'd suggest you use the "Search" feature in these forums because the answers and the references you will find are probably 100 times more complete and explanatory than what you can receive in a single thread/post.

 

After going through the search results for the subject, you can study ASME B36.10 and ASME B31.3 as well as the links below for further information. If you have any specific question afterwards, please come back.

 

http://engstandards....ng_guide_R2.pdf

http://www.engineeri...ipe-d_1337.html

[breizh]

Hi ,

Another document to support your work.

Good luck

Breizh

[samayaraj]

Pipe class indicates the range of pressure-temperature up to which you can use the pipe safely. The unit of rating is PSI.

 

There are various pressure & temperature range for each rating and you need to choose the correct rating for your design pressure & temperature. Generally, rating will be used for pipe fittings and pipes will be defined in terms of OD & schedule. Pipes of different size & sch will be grouped into particular rating if the design pressure & temperature falls within the range.

 

You need to calculate the thk of pipe and you cannot get the schedule of pipe for particular class. As I said above, P & T range will be varying for a particular rating and hence the thk of pipe will also vary. You can also refer ASME B 16.5. Im attaching a sample of ASME B 16.5 for your reference.

Attached Files

•  ASME B16.5.png   47.65KB   10 downloads

Edited by samayaraj, 14 October 2015 - 11:33 PM.