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航空MRO清洗劑的七個(gè)選擇標(biāo)準(zhǔn)
Top 7 Criteria for Qualifying a New Aviation MRO Degreaser
航空MRO清洗劑的七個(gè)選擇標(biāo)準(zhǔn)
航空維護(hù)、修理和大修 (MRO) 時(shí)一旦選擇了不合適的清潔化學(xué)品，將會(huì)充滿著風(fēng)險(xiǎn)。對飛機(jī)的適用性和安全性、人類健康和環(huán)境的長期影響被證明代價(jià)是巨大且昂貴的，違規(guī)行為將受到嚴(yán)厲的監(jiān)管處罰。在避免了這些問題后，如果所選產(chǎn)品在其使用時(shí)效率較低，則會(huì)延長維護(hù)的時(shí)間、增加維護(hù)的風(fēng)險(xiǎn)以及清潔化學(xué)品成本的進(jìn)一步發(fā)生。
Criteria 1: Aviation Compatibility of a Solvent Degreaser
No worker in the aviation community would knowingly expose aircraft or the traveling public to harm. However, there is more than a moral obligation on those choosing aircraft cleaning chemicals. FAA regulations require chemical agents used on aircraft to comply with tests qualifying the substance for aviation use. While the FAA suggests a range of tests they consider acceptable, the approval of other equivalent tests may be granted upon application to the FAA.
Aircraft manufacturers' maintenance documentation stipulates approved cleaners by name or by noting the standard to which any cleaners must be approved if used on their aircraft. Major aircraft manufacturers have testing standards approved by the FAA, and these will often be the reference quoted in the manuals. Following the manufacturer's recommendation is the safest way for an MRO to ensure regulatory compliance.
When considering a new cleaner for aviation use, it must be certified by the manufacturer to comply with the FAA or manufacturer's qualifying tests or an approved alternative. Be aware that many products will comply with the majority of a particular test but fail in one area. A common example is meeting corrosion tests but failing the acrylic crazing component. The cleaner will still be fine to use, but caution is needed where exposure to acrylic components may occur.
Techspray has created an in-depth look at the FAA's tests required of aircraft cleaners, including a list of the major manufacturer's standards, which you can access here.
Criteria 2: Human Health Effects of an Aviation MRO Degreaser
The late 20th and early 21st centuries have rightly seen increased scrutiny regarding workers' occupational exposure to chemicals. Cleaning products routinely used ingredients effective at their tasks but which have since proven harmful to individual health. Prolonged use of such chemicals can cause life-changing effects to human physiology including death.
The resulting enhanced occupational health and safety oversight has increased compliance costs for businesses. Using harmful chemicals requires a considerable investment in personal protective equipment (PPE), environment management systems, monitoring of employee exposure limits, and the use of registered contractors for disposal. In response, the aviation cleaning chemical industry offers a wide range of worker-friendly products to clients forced to seek more benign alternatives.
When choosing a new cleaning product, businesses should be alert for ingredients that include n-propyl bromide (nPB), methylene chloride, trichloroethylene (TCE), and perchloroethylene (perc).
Many products may still contain these four chemicals; however, if selected for use, the safety compliance and disposal costs experienced by a business can greatly offset their often lower purchase price.
N-propyl bromide is often used in vapor degreasing and metal cleaning products; however, studies have shown nPB to affect the peripheral and central nervous systems while also affecting the blood.[1] For a deeper dive on nPB, Techspray offers this article and this webinar while offering a guide to safe handling.
In August, 2020, in the report “Nontechnical Summary of the Risk Evaluation for 1-Bromopropane (n-Propyl Bromide)”, the US Environmental Protection Agency (EPA) determined that the solvent “presents an unreasonable risk for 16 conditions of use.” Some of those conditions of use include:
Industrial and consumer use for cleaning and degreasing
Vapor degreasers – open-top and inline
Liquid imersion cleaners
Aerosol spray degreaser/cleaner
Automotive degreasers -- i.e. for engines, brakes
Methylene chloride is used in many industrial applications, including metal cleaning and degreasing. Considered a potential occupational carcinogen, methylene chloride is toxic to the liver, kidney, and reproductive system. It impacts the nervous system and can cause liver, brain, and lung cancers and non-Hodgkin's lymphoma.[2]
Trichloroethylene is very efficient at dissolving organic materials like fats and greases, making it suitable for cleaning products. However, TCE is considered a possible carcinogen, and studies suggest it may be a factor in birth defects, testicular cancer, leukemia, and lung tumors.[3]
Perchloroethylene is a common ingredient in dry cleaning chemicals and is often used in metal degreasers, and for dewaxing metal prior to plating. Short-term exposure to high levels of perc affects the central nervous system and may lead to unconsciousness and death.[4]
The personal hazard associated with a solvent is often defined using Threshold Limit Value (TLV), which are the recommended average exposure in an 8-hour per day, 40 hour work week. This is generally set by the American Conference of Governmental Industrial Hygienists (ACGIH). The unit of measure is Parts Per Million (PPM).
The lower the TLV of a particular substance, the less a worker can be exposed to without harmful effects. TLV is stated on the MSDS of chemical products, in additional to recommended safety gear. Every organization using hazardous chemicals within their facility has the responsibility to equip their facility and personnel to maintain exposure levels below the TLV.
The following are the four common industrial solvents and their exposure limits per the American Conference of Governmental Industrial Hygienists (ACGIH), a professional organization whose recommendations are closely followed by the US Occupational Safety and Health Administration (OSHA):
N-propyl bromide (nPB) – 0.10 ppm
Methylene chroride – 50 ppm
Trichloroethylene (TCE) – 10 ppm
Perchloroethylene (perc) – 25 ppm
Criteria 3: Environmental Impact of an Aviation MRO Degreaser
Techspray Aviation Degreaser II (part #1647-16S) is specially engineered aviation degreaser, formulated specifically to meet NESHAP requirements while providing strong removal of hydraulic fluid, fuel oils, lubricating oils and greases, and other organic residues. Precision-V Aviation Maintenance Cleaner (2870-19S) has zero VOC as defined by the EPA and SCAQMD (South Coast Air Quality Management District.
標(biāo)準(zhǔn)四：燃燒性
Criteria 4: Flammability
Before considering flammability, it's important to understand the definitions of the term’s combustible, flammable, and flashpoint. When something is combustible, we may ignite it, albeit with some difficulty. Flammable items will ignite immediately at ambient temperatures when exposed to flame, and flashpoint is the lowest temperature at which the vapors of a volatile material will ignite when exposed to an ignition source.
While it may seem semantics, the three characteristics are important considerations when choosing a cleaning product. An obvious consideration is the presence of energized electrical equipment or ignition points near the area to be cleaned. In such cases, using a nonflammable cleaner is necessary. Yet, cleaning or degreasing hot gas turbine engines is a less obvious ignition source, requiring a cleaner with a high, or no flashpoint.
As a rule, flammable cleaners are considerably less expensive than nonflammable ones. However, your intended use of the cleaner will drive your decision on the most appropriate selection, with many effective non-flammable cleaners available if required.
Techspray offers the following nonflammable options:
Techspray Aviation Degreaser II (part #1647-16S) Precision-V Aviation Maintenance Cleaner (2870-19S) PWR-4 Aviation Degreaser (2851-20S) G3 Maintenance Cleaner (1630-16S) G3 Contact Cleaner (1632-16S)
Criteria 6: Cleaning Ability
The potential for maintenance technicians to miss corrosion, cracks, and wear Maintenance technician spot cleaning their work area to ensure a quality inspection
Criteria 7: Price
航空MRO清洗劑選擇表
Aviation MRO Cleaner Qualification Worksheet
Techspray 特可銳開發(fā)了一個(gè)工作表來幫助客戶選擇合適的清潔劑，提供一份需要考慮的關(guān)鍵特性的備忘錄。當(dāng)使用這七個(gè)特征作為針對特定應(yīng)用和法規(guī)要求的選擇標(biāo)準(zhǔn)時(shí)，產(chǎn)品選擇將會(huì)縮小。您可以將此工作表提供給化學(xué)品供應(yīng)商并填寫您的要求，這將使他們能夠?yàn)槟脑O(shè)施推薦最佳產(chǎn)品。然后收集您正在考慮的每個(gè)選項(xiàng)的工作表以便于比較。
Techspray has developed a worksheet to aid clients in selecting appropriate cleaning chemicals, providing an aide-memoire of the key characteristics to consider. Product choice will narrow when using the seven characteristics as selection criteria against a specific application and regulatory requirement. You can provided this worksheet to a chemical supplier with your requirements filled in, which will allow them to recommend the best product for your facility. Then collect worksheets on each option you are considering for easy comparison.
在 Techspray特可銳，我們擁有一個(gè)由化學(xué)家和應(yīng)用專家組成的內(nèi)部實(shí)驗(yàn)室，提供全面的飛機(jī)清潔解決方案以滿足您的需求。無論產(chǎn)品由誰制造，我們的專家都會(huì)制定滿足您獨(dú)特要求的策略。TechLab 服務(wù)提供的專家將了解您的清潔應(yīng)用挑戰(zhàn)，并指導(dǎo)您選擇最具成本效益的解決方案。
At Techspray, we maintain an in-house laboratory of chemists and application specialists, offering a comprehensive range of aircraft cleaning solutions to suit your needs. Our specialists will define on a strategy meeting your unique requirements regardless of who manufactures the product. The TechLab service offers experts who will understand your cleaning application challenges and guide you in a selection process for the most cost-effective solution.
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