TECHNOLOGY SHOWCASE
SAFETY FIRST Sponsored Information
Are You Overlooking Some Common Safety Problems? At least two seemingly benign hazards lurking around today’s operations could be just a damaging as arc flash. Do your maintenance teams have the knowledge and skills they need to deal with these concerns? Special To MT We are all familiar with potential hazards relating to arc flash and other electrical incidents. But what about other safety issues that plants and facilities face? Some common, yet often overlooked, safety issues include those relating to pressure and pressurized systems. These include boilers and their associated distribution systems and high-pressure refrigerants. While this is not a complete list, it’s worth noting that incidents involving these types of systems and products are just as important and potentially hazardous as any arc flash incident.
■ Finally, improper maintenance may also cause pressure
Boiler system concerns Boiler accidents can result from faulty pressure-relief valves, low water levels or corrosion to metal components caused by improper water treatment.
■ A key consideration with R-410A is to verify that equipment
■ If a pressure valve malfunctions because of corrosion or
■ Since most older systems weren’t designed to handle
lack of testing and recertification, it can fail to open or relieve its designed capacity of steam or hot water. The pressures and temperatures in the boiler will then build above design specifications and a pressure-vessel failure will occur. ■ If the water level in the boiler drops and exposes the
boiler tubes, overheating can occur and lead to further damage to the boiler—possibly causing it to explode.
problems and is a common cause of boiler accidents. High-pressure refrigerant concerns Similar to boilers are issues concerning high-pressure refrigerants. One such refrigerant—R-410A—is of particular concern: Although it does not have the ozone-depleting effects of traditional refrigerants, R-410A operates at 40% to 70% higher pressures. That means operators must be exceedingly careful when working with systems that use this type of refrigerant.
for which you are using it is designed for this refrigerant. This will ensure that the equipment can handle the higher pressures that are encountered when working with R-410A.
the types of higher pressures associated with R-410A, retrofitting them is not recommended. Using proper equipment and proper and scheduled maintenance, facilities can avoid many of these accidents before they happen. For more information on these and other workplace-safety issues, as well as related real-world plant, building and facility maintenance training programs, visit: americantrainco.com.
■ Over time, without proper water treatment, water may
become corrosive and scale may form on the heating surfaces, which in turn can cause damage to the structural integrity of the boiler itself. 44 |
MAINTENANCE TECHNOLOGY
For more info, enter 06 at www.MT-freeinfo.com NOVEMBER 2013