New at PipingDesign.com: 28 September 2000

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Maintaining and Operating Utilities
Engineer's Digest

<<In order to get rid of the condensate, drip legs, which are pipes that
run off the bottom of the steam main, need to be installed. They should be located at every bend or angle in a piping system (except for a 90-deg downward bend) and every 150 to 300 feet in a horizontal run. Drip legs should be no smaller than four inches in diameter, and, if the steam main is larger than four inches in diameter, then the drip legs should be one half the diameter of the main. The size of the drip leg is important because the condensate, which can be anywhere from the size of a marble up to the size of a golf ball, is traveling between 50 and 100 mph. If the drip legs are too small, the condensate will pass right over them.>>

Searching for Steam System Efficiency
Plant Engineering Magazine

<<Steam is an excellent heat transfer medium. Plant engineers depend on
steam systems year-round for a wide range of applications. Because of their constant use, steam systems should be considered profit centers based on their performance and efficiency. A steam generating investment can yield a high rate of return when a few basic guidelines are followed. Steam systems consist of four basic components: boiler, distribution piping, heat exchange or process equipment, and condensate return. Following is a look at general steam system design principles and some maintenance actions that can help return a steam system to its original performance parameters or better, and reduce plant operating costs as well.>> Received on Thu Sep 28 20:01:00 2000