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What does Industry consider an acceptable pressure drop across gas coolers (process gas aftercoolers) in Interstate Gas Transmission (pipeline) service in compressor station facilities? Is there a X to Y range of Psig values or a not to exceed X% of discharge-pressure. Looking for an go-by or...

Why is the compressor experiencing high temperatures in the range of 180F (RTD at discharge 10' comp. flange) when we simply gas-load the centrifugal compressor after a purge. The impellers are not turning, we are just filling in the compressor with a loading valve before opening discharge for...

Does any one one a rule of thumb or method to derate the power on Roll Royce Gas Fired Power Turbines? I have a RR 501KC7 that Id like to Derate under 128 ft of elevation and 90F. The manufactured rated Horsepower is 7200. Any feedback will help. Thank You .

I will not take any risk or put any one else in danger. Those flanges will not be drilled under my direction. Thanks

Gentlemen, What would be the derate of a 12" 900 Series Ansi Flange if I was to increase the bolt hole diameter. Is there a table or a contact that may supply this kind of information. Additional: Pipeline application Purpose: allow additional aligining clearance Any information will really...

Thank You BigInch. No, I did not mean "ongoing" as O&M cost. But Ill be happy to know what $/Hp-Hr value you forecast for your greenfield highspeed compression. Thank you.

For main line gas transmission and/or gathering, what would be the ongoing cost of gas compression for highspeed-separable green field compression. Including scrubbers, gas coolers, controls,valves, station yard and the nine yards?? I have heard #s between the $1800 to $2600 doller per...

Understanding that OEM would provide quantitative information. What im seeking here is a general comparative cost experience you may had, that answers which driver option has been typically more economical for you? I am comparing two electric driver Toshiba,GE or Siemen vs the recip option Cat-...

You should access your Oems comp performance curves for the given gas gravity and suction temp. There you will see all the speed, hp, head and efficiency relationship you desire. There are general functions, but such will make you assume an efficiency value that cannot be determined w/o the...

Very True. Not enough detail. This would be a 25,000 HP Interstate Mainline station with slow-speed integral reciprocating compressors such as Cooper Bessemer GMWs compressor at or above a 1Bcf.

When determining the overall compression required for natural Gas across a compressor or compressor station. What Delta P drop should I used for the suction and discharge of the compressor station assuming. Is there a rule of thumb of 5psig or something of the like for each side ( suction and...

Thank You So much. Very Helpful ;)

Regardless of location what is a good suction temperature to size gas transmission Horsepower. If the answer depends on compressor type. I am sizing for low-speed integrals and/or high speed separable cat-ariel compression. What do you normally use 60, 70 80F?? Any help will help. Thanks.

In reference to compression Hp requirement as a fuction of flow and pressure ratio: Hp= T1*Zavg/11.66 * k/(k-1) *SQ/nisen *[(p2/p1)^((k-1)/k) - 1] t1=suction temp Zave= average compressibility at suctiona and discharge k= ratio of specific hears SQ=standard flow in MMSCFD Hope this was of...

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Thanks In advance for any recommendations provided. Can anyone recommend a user friendly and effective software to use to determine torque or tensioning requirements for flanges considering the gasket-flange material and geometry? Any information would be of great help. Thank You!