natural gas pipeline sizing

[johngerhart]

does anyone know a good reference for sizing nat gas pipelines at either 90 or 600 psi , delta P per 100 ft .
any good cost data on $/ft installed with cathodic protection versue pipe diameter

 

[Warpspeed]

The piping and fluid mechanics engineering Forum might be a better place to ask.

http://www.eng-tips.com/threadminder.cfm?pid=378

 

[dcasto]

google weymouth and panhandle A. As of march 15th, pipe steel goes up $75/ton. The cost of cathodic protection is so small, its sometimes is just misc or contingency.

Bottom line the cost for a line is as low as $20,000/in-mile to $100,000/in-mile. In plants I use $1,500,000/mile for any size up to 10".

Labor is different, ROW, all kinds of factors.

What mid-term was this one on?

 

[KiwiMace]

I use the Weymouth Formula for High Pressure Compressible Gas Flow from Crane 410, Page 3-3, Equation 3-12.

Otherwise for 60degF, the NFPA 54 method is just as good.

 

[dcasto]

Weymouth is for low pressure, Panhandle is for High pressure