In the finishing industry, there exists a real connection between safety and quality-especially with regards to spray booths, which can run the potential risk of causing fire if not properly maintained. Equipment for dust collection is strategically made to meet specific needs in terms of performance, including airflow velocity; fan, filter and burner capacity; and safety related to fire prevention and operator wellbeing.
However, when the manufacturer ships the equipment, installation, operator training and maintenance end up being the responsibility from the finisher. Therefore, it is advisable to give the Auto Painting Room and associated processes a complete review for fire safety hazards along with other incidents that could occur.
Dust Collection – There are two sides of dust collection: quality and safety. A high quality finish is definitely the direct reaction to adequate elimination of airborne particles that may contaminate finished surfaces. This contamination causes rejects or rework of product which brings about lost profits.
It’s not simply surface finish that particle build-up could affect, though. Otherwise cleaned, particles can migrate to areas where operators may not have proper breathing protection, and fire turns into a real hazard. Sufficient airflow is essential.
The very best causes of fire in dust collection systems include: static electricity discharge, exothermic reaction due to chemical reaction of collected dust,
cutting or welding too close to the area.
The bottom line is to collect the dust with a well-designed dust collection system that boasts a smart layout and balanced air replacement. As suggested by the National Fire Prevention Association (NFPA): “Air flow must be carefully considered.” Criteria for dust collection processes usually include air velocity in the booth of 125 to 150 FPM. If properly filtered, this air may be recycled into the facility. Outdoors dilution ratios for any facility also have to consider heat, off-gases, and odors from ancillary processes such as sanding or grinding.
Furthermore, doors or pressurized plenums may be used to contain dust. An investment in containment will be reflected in less cash used on cleaning and correcting finish rejects.
Spray Finishing Systems and Booths – Paint Booth Room have numerous their very own specific requirements for safety and quality. First, sufficient and laminar airflow is required so the exhaust can capture overspray and pull it towards the filtration systems, which may be either a dry filter or a water wash. To remove particulate through the air, the correct filter media or chamber is essential. Then, the fresh air supply must be not only clean, but also at the correct temperature. Modern-day coatings might also require humidity control. Not to mention, all equipment needs to be properly grounded.
The best fire prevention may start with comprehension of what can result in a fire in a spray booth. In a conventional system, leading causes of fire include:
using spark-producing equipment including cutting, welding or grinding close to the spray area; friction, generally brought on by overheated bearings on the exhaust fan, or by rubbing of exhaust fan blades against overspray deposits on the wall of the duct; arcing electrical equipment;
spontaneous combustion; and discharge of static electricity.
In electrostatic spray operations, leading causes of fire include: ungrounded or improperly grounded objects inside the spray area, failure to completely discharge equipment before cleaning, pinhole leaks inside the paint tubing towards the spray gun, other causes comparable to conventional systems including smoking, cutting and welding.
Most of these circumstances are entirely preventable, and many of them connect with maintenance inside the spray booth, a problem called outside in Chapter 10 in the NFPA 33: Standard for Spray Application Using Flammable or Combustible Materials. The section covers general maintenance requirements, elimination of combustible deposits, maintaining high-pressure hoses, waste containers, clothing and cleaning operations amongst other excellent information.
When spray booths and finishing equipment are installed, they satisfy the criteria for a quality job the 1st time through. It’s approximately the shop to help keep the system clean to ensure that it meets that perfect, first-time performance each and every time. The program should enable: proper airflow to obtain overspray into the filters rather than on the booth floor, and proper filtration to maintain contaminants out of the air but in addition to stop overspray buildup on the fan or perhaps in the exhaust duct.
For excellent prevention standards, keep Cabina De Pintura, modify the booth filters regularly, look at the fan and stack for buildup, guard against static electricity and study the NFPA 33.
Paint Curing or Drying Ovens – Infrared and convection ovens utilized for paint curing or drying are another obvious fire hazard inside the shop. Again, the best recommendation would be to always keep the region clean and provide adequate intake air. Remove combustible deposits, as well as eliminate the risk of spontaneous combustion, ensure you hold the correct exhaust volume and purge time. Keep solvent load inside the oven underneath the “Lower Flammability Level,” and purge the oven before startup.
The same considerations for airborne contaminants needs to be applied to oven maintenance. Filtered recirculating air or filtered air seals could be critical, and both is highly recommended.
Airflow for ovens must have sufficient exhaust to evacuate solvent vapors and smoke. Also, analyze product conveyance and design the airflow in the oven to lower stirring or tracking in dirt. Intake and mkmozc filters can be purchased in many temperature ranges to match any process.
Ovens, when employed for whatever they are created are for, are a safe operation since many solvents are evaporated and other airborne contaminants and combustible deposits shouldn’t be present. It’s very dangerous when a convection oven is utilized for other means, including to evaporate solvents by the drum-load, harden booth filters or ‘treat’ other waste deposits.
SD Longxiang with a professional team for designing and manufacturing spray booth, we try to support the products and service packages for every customer with their customized request, we are not only supply the products, we supply are designer for your painting and spraying works, we supply the solution that helps you work smarter, save time and money and achieve outstanding results, now and in the future.
Shandong Longxiang Machinery Co., Ltd.
Address: Longyao Industrial Park, Xinzhai Township, Zhangqiu district, Jinan city, Shandong, China
E-mail: [email protected]