Pipe Internal Pressure Calculating

Kumar....

We all realize that this is the first pipe you have ever encountered.

Your question tells me that you are in over your head and do not understand even the first fundamental concepts relating to piping design.

I find it astonishing that you have the piping working pressure and test pressure, but have no idea of it's diameter !

Here is how design should progress:

A pipe exists in a plant because a certain volume of fluid must be delivered from one place to another in a certain amount of time.

Piping systems are sized to max and min velocities in order to minimize wear and pipe erosion as well as to minimize pressure drop.

These operating and economic limits are used to size piping system diameters

ONCE THE PIPE DIAMETER AND WORKING PRESSURE HAVE BEEN ESTABLISHED, THE PIPE MATERIAL IS SELECTED ..... THEN AND ONLY THEN THE PIPE WALL THICKNESS CAN BE CALCULATED IN ACCORDANCE WITH THE RULES OF THE PIPING CODE.

This sequence of events must be followed for all piping systems.... under all codes and standards.

Good luck, Kumar

Your assignment for today is to memorize the following pipe definitions.

There will be a test later today:

1. All pipe is to be made of a long hole, surrounded by metal or plastic centered around the hole.

2. All pipe is to be hollow throughout the entire length.

3. All pipe is to be of the very best quality, preferably tubular or pipular.

4. All acid-proof pipe is to made of acid-proof metal.

5. The O.D. (outside diameter) of the pipe MUST EXCEED the I.D. (inside diameter) otherwise the hole will be on the outside of the pipe.

6. All pipe is to be supplied with nothing inside the hole so water, steam, or other stuff can be put inside the pipe at a later date.

7. All pipe is to be supplied without rust, as this can be more readily put on at the job site.

8. All pipe is to be free of any covering such as mud, tar, barnacles or any form of manure before putting up, otherwise it will make lumps under the paint.

9. All pipe over 500 feet in length must have the words "Long Pipe" clearly painted on each end so the fitter will know it is a long pipe.

10. Pipe over two miles long must also have "Long Pipe" painted in the middle so the fitter will not have to walk the entire length of the pipe to determine if it is a long pipe or not.

11. All pipes over six inches in diameter is to have the words "Large Pipe" painted on so the fitter will not use it for a small pipe.

12. All pipe closures are to be open on one end.

13. All pipe fittings are to be made of the same stuff as the pipe.

14. Pipe specified as "Straight Pipe" shall not have fittings within its length, otherwise it becomes "Crooked Pipe."