Engineered Systems - December 2008 - (Page 17)

CaseInPoint nections, a process often used in natural gas piping because of its reliability. Heat fusion bonds both sides of a joint into a single, homogenous material, without the use of chemicals or mechanical connections. This eliminates systematic weaknesses and failpoints in the pipe. The heat-fusion connection, combined with polypropylene’s resistance to corrosion and abrasion, eased leakage concerns. By June, Bennion had presented Aquatherm to Woodward as a solid option. “At ﬁrst, I was a bit apprehensive about it, but after talking to Wade about the insulating properties of the pipe and the success it has had in Europe, I said let’s give it a try,” Woodward said. The crew dug up and removed the glycol-contaminated sand surrounding the pipe and replaced it with 6-in. Climatherm. Since Woodward and his staff were unfamiliar with the heat fusion process, Aquatherm dispatched a certiﬁed trainer to help the process along. “The company was very responsive and had a trainer onsite. He brought the ﬂanges to connect the ductile pipe to the piping and showed us how to do the whole thing. He was very patient and had a lot of knowledge about the product,” Woodward recalled. In addition to the Climatherm piping retroﬁt, stress blocks were added to the remaining ductile pipe. LEFT UNCOVERED After all the proper testing procedures were followed, Woodward left a section of the Climatherm and a section of the ductile iron exposed so he could monitor it into the summer. “We haven’t had any leaks since the project was ﬁnished,” he said, adding that he has been most impressed with the polypropylene pipe’s insulation characteristics. “I couldn’t believe that there was no condensation on the Aquatherm piping, which was really surprising since we run 45ºF water through there, and especially with the heat at that time of year. I am one hundred percent sold on it, especially for chilled water lines,” Woodward said. “We really needed something that would work on this job so I don’t have to go back in there and do this job again. The product’s ﬂexibility was a perfect ﬁt for this job.” ES You can’t control Mother Nature But you can control your environment Keep your workspace clean, comfortable and productive AIR CURTAINS • MAKE-UP AIR SYSTEMS Mars Air Systems featuring ARES • Dynaforce Mars Air Doors “The only choice for an “Air of Quality”! 800-421-1266 Tel: (310) 532-1555 • www.marsair.com Input 137 at www.esmagazine.com/instantproductinfo “Fast and easy.” DuraDrive Fastest, easiest to install. New TAC DuraDrive VBB/VBS Series ball valves and actuators all feature quick release technology. It’s easy to make the smart choice. Choose TAC DuraDrive. Think fast. Go to: www.tac.com/duradrive Input 146 at www.esmagazine.com/instantproductinfo w w w. esmag a zin e . c o m Pr od u Av ct L ai ite On la r lin ble atu r e e 17 http://www.marsair.com http://www.marsair.com http://www.esmagazine.com/instantproductinfo http://www.tac.com/duradrive http://www.tac.com/duradrive http://www.esmagazine.com/instantproductinfo http://www.esmagazine.com

Table of Contents Feed for the Digital Edition of Engineered Systems - December 2008

Engineered Systems - December 2008 Contents Editor's Note HVAC Challenge Back2Basics Case In Point Commissioning Building Automation HVACR Designer Tips Applications Checklist Lakefront Library: Radiant Systems Meet Natural Ventilation Before (And After) The Flood Basics For Refrigerant Chillers Wire-To-Shaft Efficiency For HVAC Pumps Products Glossary Classifieds Advertiser Index Tomorrow’s Environment

Engineered Systems - December 2008

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