Process Puzzler: Tackle Exchanger Flaws

A variety of issues may contribute to ongoing problems.

july puzzler 2015 mn

This Month’s Puzzler Our makeup-air heat exchangers seem to have suffered ruptured tubes. On the shell side, we use 45-psig steam reduced from 200-psi boilers. We send 40% propylene glycol/water through the tubes; at the steam control valve inlet with a 50% load it’s 42 psig. The exchangers are horizontal U-tubes with ¾-in. × 0.049-in. (16 BWG) copper tubes. The tubes were rolled into a 316L stainless steel tube sheet and sealed with fluorocarbon gaskets. Both exchangers are 24-in. diameter and 6-ft long. The exchangers are about 50% oversized sometimes while running about 105% during the winter months. We run one at a time. Another concern is that the tube-side…

Full Story

Don't Miss These Online Exclusives

The CP 50

cp50 thumbChemicalProcessing.com has selected 50 companies that play a key role in trends and developments in the chemical industry. Check out the latest news about these influential firms.

Ask the Experts

ate thumbTap the expertise of authorities on a wide variety of processing-related subjects, and read answers to hundreds of questions. Access the experts.

cartoon 150511 100 120Comical Processing Cartoon

Our pal Jerry King, award-winning artist, provides the cartoon. We want you to pen the funny captions. Submit your caption now.

Quick Poll

This month's poll: Which types of measurements cause headaches at your site?

Editor's Take

Which types of measurements cause headaches at your site? We want to know. Why? Well, for starters we can tailor our content to help alleviate your headaches. So please take a minute and answer our quick poll. In the meantime, take two aspirin and relax!

Traci Purdum, Senior Digital Editor
tpurdum@putman.net

Most Recent

  • Process Puzzler: Tackle Exchanger Flaws

    This Month’s Puzzler Our makeup-air heat exchangers seem to have suffered ruptured tubes. On the shell side, we use 45-psig steam reduced from 200-psi boilers. We send 40% propylene glycol/water through the tubes; at the steam control valve inlet with a 50% load it’s 42 psig. The exchangers are…

    Full Story
  • Exchanger Technology Heats Up

    By Seán Ottewell, Editor at Large

    Heat exchanger efficiency is crucial. Fortunately, the chemical industry is benefiting from improvements as equipment makers such as Alfa Laval, Klaren International and Heatric leverage the latest materials and technologies to boost performance. Five main factors — energy efficiency, capacity,…

    Full Story
  • Catalyst-Free Method Creates Polyurethanes

    By Chemical Processing Staff

    Researchers at Washington State University, Pullman, Wash., have developed a bio-based method to create a variety of polyurethanes that promises economic and environmental benefits. The scientists, working with colleagues from Iowa State University, Ames, Iowa, and Cairo University, Orman-Giza,…

    Full Story
  • Membranes Simplify Water Treatment

    By Chemical Processing Staff

    Researchers in Australia have developed polyelectrolyte multilayer (PEM) membranes for reverse osmosis and nanofiltration that promise to simplify treatment of brackish and sea waters and, thus, save energy. The membranes obviate the need for the dechlorination and rechlorination steps typically…

    Full Story
  • Preclude Packed-Column Problems

    By Andrew Sloley, Contributing Editor

    A fractionating column requires proper mixing of the entering liquid and the liquid already inside. For columns with trays, this rarely poses a problem. Trays are excellent mixing devices. In contrast, columns with packing don’t always provide adequate liquid mixing and, as a result, can suffer…

    Full Story
  • Safety Is No Accident

    By Chemical Processing

    The best laid plans are just that – plans. Unless you have someone championing the plans it’s nothing more than a useless exercise. This is true with process safety and unfortunately lives have been lost because of it. To truly improve process safety management (PSM), the responsibility falls…

    Full Story

Latest Products