A fume is a solid particle that forms from the condensation of a gaseous substance. Examples of fumes include metal oxides. They can also be vaporized. In addition to vaporizing, fumes can also be volatilized. These particles are dangerous because they can cause a variety of respiratory and health effects.
Standard Operating Configuration (SOC) limit
When designing a fume hood exhaust system, it is important to consider the SOC or Standard Operating Configuration. The SOC is based on the sash’s position in the working position, and the amount of air needed to meet the hood’s face velocity.
While face velocity has been the performance safety method of choice for fume hood users for years, it isn’t a perfect measure. In fact, it’s oversold. A better way to measure face velocity is by using a tracer gas.
The EHS performs surveys on fume hoods throughout campus on an annual basis. During each survey, face velocity is measured with the sash at its SOC position. During the survey, the inspector will position an inspection sticker in the proper position to capture the maximum safe sash position. He will also record the hood’s continuous monitoring device reading and furnish a written report to the person responsible for the hood, the Chemical Hygiene Officer for the department, and the Facilities staff for the laboratory building.
Types of fume hoods
There are different types of fume hoods. Each type has its own benefits. The first is the safety and protection provided by the fume hood. Another advantage is its reduced cost. Some fume hoods have multiple sash positions. You can determine which one best suits your needs by determining the size of your workspace and the number of fume hoods you need.
Fume hoods are made of several materials. Some are made of thermoplastic polymers, and others are made of metal. Polypropylene hoods are a good choice if you want superior chemical resistance. These hoods are generally lightweight and are available in a variety of colors. However, they aren’t heat resistant and may scratch easily.
Another advantage of fume hoods is that they can be easily moved. Portable fume hoods are more convenient to transport and require less maintenance than ductless ones. Regardless of the type, it’s important to know how to use your hood properly. Before using it, make sure the airflow is optimal, and remove any obstructions in front of your face.
Cleaning the inside of a fume cupboard
Cleaning the inside of a fume cupboard is an important process in order to ensure that the fume cupboard is clean and in good condition. Chemical fumes can be quite harmful to people, and cleaning the fume cupboard regularly is essential to protect yourself and your staff. You must also ensure that the fume cupboard is free of any metals, as metals can attract the fumes.
In addition to cleaning the interior of the fume cupboard, you should also check the filters. The filters are essential to keep the fumes and dust from escaping the fume cupboard. Choosing the right filters for your fume cupboard is crucial to ensuring that you get the best protection possible from it.
Before you start your experiments, it’s important to check all your glass containers. Damaged glass should be discarded immediately. Also, ensure that all the containers are properly labeled. If not, you may need to set up a specific area for containers that you are unsure of. Also, make sure that you keep the emergency equipment close by, as this will help you if something goes wrong.
Chemical cross-contamination poses a serious risk to worker health. Occupational exposure limits (OELs) limit the level of exposure that an employee can tolerate before it adversely affects his or her health. A single exposure may cause serious health consequences. The OEL can be lowered to a safe level by ensuring that the hood is properly maintained.
Fume cupboards are used to limit the concentration of fumes in the air. They also contain spilled materials in spill-tray trays to minimize cross-contamination risks. A fume cupboard is a five-sided box with a window at the front. It is also level with the working surface. The fume cupboard allows the technician to weigh, portion and store materials without risking cross-contamination.
Fume hoods are not designed to contain high velocity releases of particulate contaminants. When the sash is closed, these volatile substances may escape. Excess airflow can result in explosions. As such, fume hoods must be used properly.