December 2008 Vol. 235 No. 12



Pipeline Permitting Process Eased By Early State, Local Involvement

The inventory, evaluation and treatment of cultural resources represent a significant challenge for those charged with siting and permitting natural gas pipelines. Recent pipeline projects in the U.S. have involved environmental study corridors that are extensive, resulting in the identification of large numbers of cultural resources. Fortunately, the Federal Energy Regulatory Commission (FERC) has attempted to reduce the number of steps required to achieve licensing for projects under its oversight. Specifically, the FERC has introduced a program called the Pre-filing Process.

Rapid Crack Propagation Increasingly Important In Gas Applications: A Status Report

Polyethylene (PE) is the primary material used for gas pipe applications. Because of its flexibility, ease of joining and long-term durability, along with lower installed cost and lack of corrosion, gas companies want to install PE pipe instead of steel pipe in larger diameters and higher pressures. As a result, rapid crack propagation (RCP) is becoming a more important property of PE materials.

Simulation Helps Reduce Pressure Drop On Gas Turbine Inlet Duct By 50%+

Duke Energy uses a GE Frame 5 gas turbine to drive a compressor used in a natural gas pipeline. The intake system required retrofitting with a silencer to meet current regulations and the need also existed to reduce particle contamination. The pressure drop in the initial design was found to be 8.5 inches of water, much higher than the design specification which was 5.3 inches.


Conditioning Orifice Plate For Wet Gas Flow Measurement

As traditional natural gas reservoirs are depleted, producers are forced to target lower pressure wells that typically produce a “wet gas.”

Using PD Screw Pumps To Move Crude Boosts Efficiency And Reduces Emissions

Colfax Corporation says its line of rotary positive displacement (PD) screw pumps moves crude oil reliably while responding to growing industry demand for higher energy efficiency and greater environmental responsibility.