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Archives :: Processing & Handling :: Operations & Maintenance

Displaying 21 - 38 of 38 stories.
March 15, 2008
Tube plugging is probably the most frequently used maintenance and repair technique for the tube side of an exchanger. This article provides information on how to locate the positions of tube failures and discusses why it is important to know such information. It describes how to find out where the tubes failed and explains how to analyze what caused failures, seen from the tube side. Descriptions of...
http://www.che.com/processing_and_handling/operations_and_maintenance/Maintaining-and-Repairing-Heat-Exchanger-Tubes_3731.html
February 15, 2008
Hydrocarbon leaks can disrupt recirculated cooling-water systems. Here’s an outline of effects and remedies Water is often the fluid of choice for cooling systems in the chemical process industries (CPI). Recirculated cooling-water systems are used to control the temperature of process fluids, which is necessary for process control and to achieve target product yields and specifications. Hydrocarbon...
http://www.che.com/processing_and_handling/operations_and_maintenance/Environmental-Manager-Caring-for-Cooling-Water-Systems_3664.html
February 15, 2008
Careful control of water and steam chemistry at CPI facilities can pay off handsomely in reliable operation Sometimes lost in the hustle and bustle of production issues at chemical-process-industries (CPI) facilities is that high-purity water, and steam produced thereby, is the lifeblood of the plant. Yet, equipment failures and curtailed production due to water and steam issues can cost a company hundreds...
http://www.che.com/processing_and_handling/operations_and_maintenance/Cover-Story-CPI-Water-and-Steam-Chemistry_3668.html
January 15, 2008
Corralling gigabytes of predictive maintenance data isn’t easy, but it’s essential for streamlining your process Plant maintenance is one of the disciplines in a chemical process environment that uses gigabytes of technical and operational data on a daily basis. Of course, managing an industrial plant involves a large amount of data, which can be acquired, stored and represented in numerous...
http://www.che.com/processing_and_handling/operations_and_maintenance/Feature-Report-Computerized-Maintenance-Management-Systems-For-Effective-Plant-Performance_3606.html
November 15, 2007
A plasma-based waste-treatment process will be installed in Dow Corning Corp.’s silicon-products-manufacturing plant in Midland, Mich., where it will recycle chemical wastes, help lower the site’s consumption of natural gas by 400-billion Btu/yr and help reduce the plant’s total emissions by 75%. The installation will mark the first use of the technology in a chemical process plant, says...
http://www.che.com/processing_and_handling/operations_and_maintenance/Plasma-gasification-process-will-recycle-chlorine-wastes-and-produce-syngas_3505.html
October 1, 2007
Click here for full pdf version of this article - includes all graphs, charts, tables, and author information   Explosion prevention must be a primary objective wherever the process of transferring powders into flammable solvents is utilized, irrelevant of the industry and existing practices, in accordance with regulatory guidelines such as the ATEX directives (Directive 94/9/EC, 1994 and Directive...
http://www.che.com/processing_and_handling/operations_and_maintenance/Prevent-Explosions-During-Transfer-Of-Powders-Into-Flammable-Solvents_3394.html
July 1, 2007
    Most columns shut down without fires. Yet most refineries and chemical plants at some time or another have experienced spontaneous or hot work ignitions in at least one column. When this occurs inside a column during or after shutdown, the results can be devastating and dangerous. This paper concentrates on the fires related to packing in columns.   Many refineries and chemical plants...
http://www.che.com/processing_and_handling/operations_and_maintenance/Causes-and-Prevention-of-Packing-Fires_3124.html
July 1, 2007
    Glass-lined steel equipment is used in a wide range of chemical processes that involve harsh chemicals, including the production of pharmaceuticals, specialty chemicals, agricultural products and polymers. One of the reasons for the attraction is that glass is resistant to attack from most chemicals and to mixtures of corrosive materials. In addition, it has a smooth, anti-stick surface, is...
http://www.che.com/processing_and_handling/operations_and_maintenance/Maintenance-and-Repair-of-Glass-Lined-Equipment_3137.html
July 1, 2007
Linde Gas (Murray Hill, N.J.; edlinks.che.com/6897-538) and partners have developed a high-pressure gas-delivery system that allows coating powders to be sprayed using liquid nitrogen at temperatures that do not melt the powder particles. The system has been optimized to support a new, cold spray gun technology, called Kinetiks 4000, manufactured by CGT GmbH (Ampfing, Germany). Such a system is being...
http://www.che.com/processing_and_handling/operations_and_maintenance/Cold-spray-coatings_3289.html
June 1, 2007
    Most assets depreciate, losing value over time as a result of wear and tear, age, or obsolescence. Corrosion, like depreciation, results in the often hidden cost of a non-cash expense — measurable in terms of reduced operating life — that reduces the value of assets. Many engineers in the chemical process industries (CPI) see corrosion on a “straight-line basis” in...
http://www.che.com/processing_and_handling/operations_and_maintenance/A-New-Approach-to-Corrosion-Monitoring_3123.html
June 1, 2007
    Although sealing technologies rarely make the headline, when they do, its usually for a tragic reason, which demonstrates how important this small component really is. For example, on January 28, 1986, the Space Shuttle Challenger disintegrated 73 seconds into its flight, after an O-ring seal in its right solid rocket booster (SRB) failed. The seal failure caused a flame leak from the SRB...
http://www.che.com/processing_and_handling/operations_and_maintenance/Small-but-mighty_3327.html
April 1, 2007
Another online boiler-cleaning system, in this case for coal-fired watertube boilers, is offered by GE Energy (Kansas City, Mo.; edlinks.che.com/6894-539). GE's automated system, called Powerwave+, is more efficient and less expensive than sootblowing with high-pressure steam, the commonly used online method for cleaning the...
http://www.che.com/processing_and_handling/operations_and_maintenance/-and-this-one-uses-shock-waves-to-clean-watertube-boilers_3237.html
March 1, 2007
  The preparation of a unit for restart requires complex and systematic approach. A plant restart project is traditionally composed of four steps: 1. A detailed unit-status evaluation 2. Preparation for onsite work 3. Major onsite work, which involves significant expenses for personnel, supply, equipment renting and contractors 4. Restart of the plant, which focuses on bringing the unit online. Upon...
http://www.che.com/processing_and_handling/operations_and_maintenance/Unit-Restarts-Where-to-Begin_3132.html
January 1, 2007
    A wake-up call for plant maintenance The new Simatic Teleservice Adaptor IE (photo) facilitates cost-effective remote maintenance of machinery and plants. In acute service cases or emergencies, an email can be sent via the device. The engineer then scans the plant status via remote connection and carries out modifications. A new version of the adapter with Industrial-Ethernet interface has...
http://www.che.com/processing_and_handling/operations_and_maintenance/Maintenance-Tools_3152.html
December 1, 2006
As the demand for productions plants with “mega” capacities grows, one challenge facing engineering contractors has been how to move the very large vessels, columns, heat exchangers and other equipment as it's being constructed. Now companies that fabricate and assemble equipment weighing from 20 to 300 tons and greater can now freely move those items anywhere in their...
http://www.che.com/processing_and_handling/operations_and_maintenance/An-alternative-to-cranes-for-moving-heavy-equipment_3051.html
December 1, 2006
Surfaces treated with Top on Top — a new surface refinement technology developed by Degussa AG (Düsseldorf, Germany; edlinks.che.com/6519-552) — are easy to clean and...
http://www.che.com/processing_and_handling/operations_and_maintenance/Stay-clean-surfaces_3059.html
November 1, 2006
A new primer technology for coating aluminum aircraft that uses magnesium instead of chromium has been developed by researchers at the North Dakota State University (Fargo; edlinks.che.com/5618-546). A...
http://www.che.com/processing_and_handling/operations_and_maintenance/Cr-free-coatings_3039.html
August 1, 2006
Cleaning the inside of large storage tanks at petroleum refineries and bulk chemical facilities typically involves workers using water cannons, shovels and even mini bulldozers. Such manual labor is not only time-consuming, but places the workers at risk due to flammable and toxic vapors that may be present. A device developed by researchers at...
http://www.che.com/processing_and_handling/operations_and_maintenance/This-device-reduces-manual-labor-for-cleaning-storage-tanks_2983.html
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