Within the finishing industry, there is 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 when it comes to performance, such as airflow velocity; fan, filter and burner capacity; and safety pertaining to fire prevention and operator wellbeing.
However, once the manufacturer ships the equipment, installation, operator training and maintenance become the responsibility of the finisher. Therefore, it is best to give the Auto Painting Room and associated processes a thorough review for fire safety hazards and other incidents that may occur.
Dust Collection – There are 2 sides of dust collection: quality and safety. An exceptional finish is definitely the direct reaction to adequate elimination of airborne particles that could contaminate finished surfaces. This contamination causes rejects or rework of product which brings about lost profits.
It’s not only surface finish that particle build-up can affect, though. If not cleaned, particles can migrate to locations where operators may not have proper breathing protection, and fire turns into a real hazard. Sufficient airflow is key.
The best factors behind fire in dust collection systems include: static electricity discharge, exothermic reaction as a result of chemical reaction of collected dust,
cutting or welding too near to the area.
The end result is to accumulate the dust having a well-designed dust collection system that contains a smart layout and balanced air replacement. As suggested by the National Fire Prevention Association (NFPA): “Air flow has to be carefully considered.” Criteria for dust collection processes usually include air velocity inside the booth of 125 to 150 FPM. If properly filtered, this air could be recycled into the facility. Fresh air dilution ratios for any facility also have to consider heat, off-gases, and odors from ancillary processes like sanding or grinding.
In addition, doors or pressurized plenums may be used to contain dust. A good investment in containment will likely be reflected in less money spent on cleaning and correcting finish rejects.
Spray Finishing Systems and Booths – Inflatable Car Spray Booth have several 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 get rid of particulate from the air, the correct filter media or chamber is essential. Then, the new air supply must be not only clean, but also at the correct temperature. More sophisticated coatings may also require humidity control. And naturally, all equipment has to be properly grounded.
The most effective fire prevention may begin with knowledge of exactly what can cause a fire in a spray booth. In a conventional system, main reasons for fire include:
using spark-producing equipment such as cutting, welding or grinding nearby the spray area; friction, generally caused by overheated bearings on the exhaust fan, or by rubbing of exhaust fan blades against overspray deposits on the wall in 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 within the spray area, failure to totally discharge equipment before cleaning, pinhole leaks inside the paint tubing for the spray gun, other causes much like conventional systems including smoking, cutting and welding.
All of these circumstances are entirely preventable, and many of them relate with maintenance within the spray booth, an issue called outside in Chapter 10 in the NFPA 33: Standard for Spray Application Using Flammable or Combustible Materials. The section covers general maintenance requirements, removal of combustible deposits, maintaining high-pressure hoses, waste containers, clothing and cleaning operations amongst other very good information.
When spray booths and finishing equipment are installed, they fulfill the criteria to get a quality job the 1st time through. It’s as much as the store to help keep the system clean so that it meets that perfect, first-time performance each time. The system should permit: proper airflow to have overspray in to the filters rather than on the booth floor, and proper filtration to maintain contaminants out from the air but additionally to avoid overspray buildup on the fan or even in the exhaust duct.
For excellent prevention standards, keep Furniture Spray Paint Booth, change the booth filters regularly, look into the fan and stack for buildup, guard against static electricity and read the NFPA 33.
Paint Curing or Drying Ovens – Infrared and convection ovens employed for paint curing or drying are another obvious fire hazard in the shop. Again, the best recommendation is to remember to keep the region neat and provide adequate intake air. Remove combustible deposits, as well as eliminate the potential risk of spontaneous combustion, ensure you hold the correct exhaust volume and purge time. Keep solvent load within the oven beneath the “Lower Flammability Level,” and purge the oven before startup.
Exactly the same considerations for airborne contaminants needs to be placed on oven maintenance. Filtered recirculating air or filtered air seals could be critical, and both is highly recommended.
Airflow for ovens should have sufficient exhaust to evacuate solvent vapors and smoke. Also, analyze product conveyance and design the airflow of the oven to reduce stirring or tracking in dirt. Intake and mkmozc filters can be purchased in many temperature ranges to fit any process.
Ovens, when utilized for the things they are created are for, are a safe operation as most solvents are evaporated as well as other airborne contaminants and combustible deposits shouldn’t be present. It’s very dangerous whenever a convection oven is used for other means, like 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]