Pipe/Flange Pressure Design

[lsceeng]

I have several questions related to pipe design, specifically related to sizing of flanges and pipe thicknesses based on expected pressures.

Here's an example:
Say the maximum expected distribution pressure that is expected for a black steel 12" pipeline is 100 psi, and the maximum water hammer surge pressure is 100 psi.

According to AWWA C207 a Class D flange is only suitable for a pressure rating of 175 psi. Does this mean a Class E flange is required? What kind of factor of safety is used for the Class D pressure rating - if any? are allowances for surge pressures included?

What are the requirements for pipe thickness?

 

[bimr]

The information that you are interested in is usually found in a project piping standard. Here is a link to an online piping guide for your reference. You should be able to find answers to your question in this reference.

http://engstandards.lanl.gov/esm/pressure_safety/process_piping_guide_R2.pdf