Improving Room Layouts can Reduce Noise Disturbance 

Improving Room Layouts can Reduce Noise Disturbance 

In all cases, the location and layout of rooms within dwellings will play an important role in relation to the levels of subsequent ambient or background noise that surrounds the occupants. In most cases much of noise is transmitted through the wall and floor partitions between habitable dwellings, such as flats and terrace houses.

Improving Room Layouts can Reduce Noise Disturbance 

Main ‘habitable’ rooms such as Kitchens or living rooms, which back onto bedrooms of the adjacent dwelling, are more likely to lead to noise complaints. Kitchen cupboards doors may transmit impact noise through to the bedroom next door through the dividing partition; this can lead to annoyance and frustration for the neighbour.

To reduce the chance of noise complaints, wherever possible hallways/corridors should be placed alongside the adjacent property to reduce the chance of noise transference and reduce the risk of sound testing failure. Failing this a kitchen should be places against a kitchen and bedrooms should back onto other bedrooms.

Improving Room Layouts can Reduce Noise Disturbance 

Planning a good acoustically favourable dwelling layout can help to reduce the number of noise problems that will occur even if your building passes the Part E Sound Insulation Testing.

If neighbours have varied working patterns, i.e. they work night shifts and arrive back in the early hours of the morning, i.e. the layout of the rooms use of rooms are particularly important.

APT Sound Testing can advise on all types of acoustic design, whether it’s accomplished during initial construction or during a refurbishment/renovation project. We also undertake UKAS accredited sound testing providing a ‘one stop’ solution for all your acoustic testing and design requirements throughout London and the South East.

If you would like more information in regards to sound testing please follow our blog at: http://soundtestinguk.blogspot.co.uk or contact us at: info@aptsoundtesting.co.uk and 07775623464 or visit our website at: www.aptsoundtesting.co.uk

Cleanroom Particulate Testing and Validation


Cleanroom Particulate Testing and Validation

To minimise particle contamination it is important to build separate environments, called cleanrooms that allow particle limits to be maintained at measurable and controllable levels. It is essential that cleanrooms are tested in-line with the relevant ISO standard to ensure they are working as designed.

Cleanroom Particulate Testing and Validation

Cleanroom Testing and Commissioning

A well designed cleanroom can achieve these great cleanliness levels by maximising laminar airflow and particle traps. Laminar airflow is air moving in one direction, which allows particles to be swept away from an area. Particle traps are areas where particles gather and escape laminar airflow. Careful cleanroom designs can minimise these areas to reduce particulate build up.

Hepa filters installed in the ceiling allow filtered air to pass down toward the floor. The floor tiles have small holes that allow the air to pass under the floor, where air-returns (air ducts) transport the air back to the ceiling filters. This filtration process can exchange the cleanroom’s entire volume of air more than thirty times per hour, resulting in the cleanest environment possible while minimising the movement of particles.

Clean room testing and certification guarantees that the facility has met the requirements for a statistically-valid maximum concentration of specified-size airborne particles.

Following our clean room testing and/or validation service, we present you with a clear, well-structured reportage that can be compiled, quality checked and issued to you while still on site, minimising the down time of your operations. We will also take time to explain the process and reportage to ensuring that you fully understand the testing process and your final results.

We will issue you with test certificates, as well as calibration certificates for all of the equipment used and we will also document any recommendations for improvements that could be made to make the clean room more efficient in regards to its operation.

We Have Your Clean Room Validation Testing Covered

I hope the above information was informative. If you would like some more information in regards to our cleanroom testing service please don’t hesitate to contact Darren directly on 07775623464.

APT Cleanroom Testing provides clients with a reliable and proactive clean room testing service. If you would like to know more about our particulate testing service and/or HEPA filter testing service to cleanrooms, please don’t hesitate to contact us at:  info@airpressuretesting.net

The Different Types of Particle Counters

The Different Types of Particle Counters

APT uses the latest Airborne Particulate Counters to undertake Particle Testing to Clean Rooms. Many people assume that’s the only type of Particle Counters; however, there are many varieties of particle counters. The primary differences depend upon the medium in which particles are suspended: air, liquid, gas, vacuum, or atmospheric/meteorological.

Airborne Particle Counters

Airborne particle counters measure air contamination in HEPA-filtered cleanrooms for disk drive assemblies, pharmaceutical manufacturers, small test benches, rocket launch facilities, and hundreds of different controlled air applications. WE use this type of Particle Counter during our clean room testing.

Liquid Particle Counters

Liquid particle counters measure contamination in a wide range of fluids including drinking water, injectable drugs, transmission fluids, and hydrofluoric acids. Some liquid particle counters require an accessory called a Sampler. A sampler communicates with the particle counter, automatically extracts a precise volume of liquid, and, programmed with the counter’s specific delivery rate, dispenses the liquid to the particle counter. Some liquid counters directly connect into plumbing lines or use pressurized gases to eliminate bubbles in chemicals.

Gas Particle Counters

Gas particle counters measure contamination suspended in gases. These gases may be either inert or volatile, and either dry (anhydrous) or contain trace water vapours. Usually, the gas particle counter’s design provides contamination measurements at pressures ranging from 40 – 150 psig.

Vacuum Particle Counters

Vacuum particle counters fill a niche market where processes occur under negative pressures (vacuum), which offer unique challenges. Particles do not exhibit predictable movement in vacuum, so specialized particle counters must depend upon a particle’s momentum for detection.

Atmospheric/Meteorological Particle Counters

One of the original particle counter applications, atmospheric (or meteorological) particle counters examine atmospheric contamination like pollution or provide detailed weather studies. These instruments measure water droplets, ice crystals, condensation nuclei, or contamination drift from oil fires and volcanic eruptions.

APT has your Clean Room Validation Testing Covered

I hope the above information was informative. If you would like some more information in regards to our cleanroom testing service please don’t hesitate to contact Darren directly on 07775623464.

APT Cleanroom Testing provides clients with a reliable and proactive clean room testing service. If you would like to know more about our particulate testing service and/or HEPA filter testing service to cleanrooms, please don’t hesitate to contact us at:  info@airpressuretesting.net

Airborne Particulate Testing on Clean Rooms

Airborne Particulate Testing on Clean Rooms

In January 2016, ISO introduced an update to standards ISO 14644-1:2015 – Classification of air cleanliness by particle concentration and ISO 14644-2:2015 and monitoring to provide evidence of cleanroom performance related to air cleanliness by particle concentration.

It is essential that your undertake clean room particle testing to prove it complies with ISO 14644-1:2015 – Classification of air cleanliness by particle concentration. This ensures that your cleanroom continues to perform efficiently and enhance your ongoing business process,

Within ISO 14644-2:2015 – Monitoring to provide evidence of cleanroom performance related to air cleanliness by particle concentration; recommends customers to complete risk assessments and monitoring plans to determine the frequency of testing and validation to their individual cleanroom processes.

Clean room Certification guarantees that the facility has met the requirements for a statistically-valid maximum concentration of specified-size airborne particles.

Airborne Particulate Testing on Clean Rooms

Following our clean room testing and/or validation service, we present you with a clear, well-structured reportage that can be compiled, quality checked and issued to you while still on site, minimising the down time of your operations. We will also take time to explain the process and reportage to ensuring that you fully understand the testing process and your final results.

We will issue you with test certificates, as well as calibration certificates for all of the equipment used and we will also document any recommendations for improvements that could be made to make the clean room more efficient in regards to its operation.

APT Clean Room Testing provide trained clean room test engineers, offering comprehensive and proactive validation service to the requirements of all current ISO standards and guidelines.

APT has your Clean Room Validation Testing Covered

I hope the above information was informative. If you would like some more information in regards to our cleanroom testing service please don’t hesitate to contact Darren directly on 07775623464.

APT Cleanroom Testing provides clients with a reliable and proactive clean room testing service. If you would like to know more about our particulate testing service and/or HEPA filter testing service to cleanrooms, please don’t hesitate to contact us at:  info@airpressuretesting.net

Air Handling Systems for Clean Rooms

Air Handling Systems for Clean Rooms

Clean rooms need a lot of air and usually at a controlled temperature and humidity. This means that in most clean room facilities the Air Handling Units (AHU) consume over 60% of all the site power. As a general rule of thumb, the cleaner the cleanroom needs to be, the more air it will need to use. AHU systems can be designed to recirculate (if product characteristics permit) about 80% air through the room, removing particulate contamination as is it generated, whilst keeping the temperature and humidity stable.

HEPA Filter Testing 

In a nutshell a well-designed air handling system should be able to deliver both “fresh” and “recirculated” filtered clean air into the cleanroom in such a way and at a rate so that it flushes the particles from the room. Depending on the nature of the operations, the air taken out of the room is usually recirculated through the air handling system where HEPA filters remove the particulates out of the air.

In some cases the room may encounter high levels of moisture, noxious vapours or gases from the onsite processes, raw materials or products and therefore cannot be recirculated back into the room. When this happened the air in these types of cleanrooms is usually exhausted straight to atmosphere and 100% fresh air is then introduced into the facility.

The volume of air introduced into a cleanroom is often tightly controlled and so is the volume of air that is removed. Most cleanrooms are operated at a higher pressure to the atmosphere, which is achieved by supplying a higher supply volume of air into the cleanroom than the supply of air being removed from the room. The higher pressure then causes air to leak out under the door or through the tiny cracks or gaps that are inevitably in any cleanroom.

Particulate Testing to Clean Room

Any good air handling system will make sure that air is kept moving throughout the cleanroom. The key to good cleanroom design is the appropriate location of where the air is brought in via the supply and taken out via the exhaust. Although careful design of the cleanroom is important, it still remains that people are one of the biggest contaminants in any cleanroom environment. If a person is just standing still in a clean room they still emit up to 100,000 particles a minute into the clean room environment. Therefore you should try to reduce the amount of exposed skin in any cleanroom environment.

We at APT Clean Room Testing, hope that this article was helpful in helping some of you to understand the basics, necessities, and complexity of a cleanroom.

APT Clean Room Testing provides a comprehensive and proactive cleanroom validation service to the requirements of all current ISO standards and guidelines. If you would like more information on our cleanroom testing services please don’t hesitate to contact Darren directly on 07775623464.

Our Cleanroom Validation Services

Our Cleanroom Validation Services 

APT Clean Room Testing also carries out Air Change Rates for your facilities, in accordance with the Orange Guide and the current ISO standards. In the event of contamination it is important for customers to know that the air will be changed in accordance with site and regulatory requirements to remove the contamination in an expedient manner. Our proactive testing and clear and concise reportage help our customers and stakeholders quickly identify the performance of their cleanroom facility in this respect.

Clean Room Validation Services

cleanroom-validation-services

We can also undertake Airborne Particulate Cleanliness Counts (Particle Counts). These are performed in accordance with each client’s facility classification, whether it is to an ISO or GMP standard. We use state of the latest calibrated Particle Counters that are regularly serviced and calibrated to ensure optimum performance.

HEPA Filter testing is carried out using the industry standard DOP method, whereby each filter is subjected to an upstream aerosol challenge; the downstream side of the filter is scanned with a photometer to identify the presence of any leaks. It is also important to ensure that each filter has been installed correctly and the filter frame and its housing are also thoroughly checked.

Our engineers have lots of experience across numerous industries from automotive to medical and all our data is produced and recorded record in a clear, concise and comprehensive Cleanroom Reports. Our Cleanroom contain all of the relevant information and data as expected by customers and regulatory authorities, including:

  1. Detailed method statements explaining how each validation test is performed
  2. Detailed records of measurements recorded during the validation visit
  3. Copies of calibration certificates for all test equipment used
  4. Original print-outs from particle counters (where relevant)

We undertake the Cleanroom Validation Services:

  • Air Change Rate Calculations (ACR)
  • Air Volume Flow Rates
  • Airborne Particulate Cleanliness Counts
  • Differential Pressure Measurements
  • HEPA Filter Integrity Leak Testing – DOP Method
  • Temperature, Humidity, Light and Noise Level readings
  • Recovery Performance testing
  • Airflow Visualisation tests, supported by a full written report
  • We also provide temperature mapping of rooms and storage facilities, in order to meet customers regulatory and QA requirements.

APT can carry out your Fume Cupboard and LEV Testing

I hope the above information was informative. If you would like some more information in regards to our Fume Cupboard Testing Service and/or LEV Testing Service, please don’t hesitate to contact Darren directly on 07775623464 and/or email us at: info@aptcleanroomtesting.co.uk

Clean Room Testing and Validation Services

Clean Room Testing and Validation Services
There are varying standards that apply to different classes of clean room, and how to carry out the cleanroom testing in a consistent and reliable way.  The Cleanroom Validation Standards are as follows:

ISO 1 class (No GMP Classification)

ISO 1 class is the cleanest, with an allowable particle count of just 10 per m3 at 0.1µm and just 2 per m3 at 0.2µm. This type of facility is very uncommon would be used only for the most sensitive research and development work involving, for instance, semi-conductors or nano-technology.  ISO Class 1 is significantly cleaner than the cleanest cleanroom specified by either the BS 5295 standard or the EU GMP standard, whose highest grade cleanrooms equates approximately to ISO Class 3 and ISO Class 5 respectively.

ISO Class 5 (GMP classification A and B)

ISO Class 5 facility is considered a high grade cleanroom and is typically required for aseptic applications such as sterile filling of pharmaceutical products into containers, for example. It allows up to 100,000 particles of 0.1µm and up to 3520 particles of 0.5µm per m3. An ISO Class 5 cleanroom equates to EU GMP class A and B, and BS 5295 Class E and F.

ISO Class 7 (GMP classification D)

An ISO Class 7 facility can have an unrestricted number of small particles (0.1µm to 0.3µm) but must have no more than 352,000 particles at size 0.5µm and no more than around 2,900 particles at 5µm. This equates to an EU GMP Class C facility or a BS 5295 Class J facility and would typically be used for sub-sterile pharmaceutical processes.

ISO Class 8 (GMP classification D)

An ISO Class 8 cleanroom is permitted up to 3,520,000 particles at size 0.5µm and 293,000 particles at size 5µm, equating approximately to EU GMP Class D or BS 5295 Class K. This level of cleanliness would be used for less sensitive applications where sterility is not an issue but where it makes general sense to maintain a good level of hygiene, such as packaging or storage of pharmaceuticals.

Clean Room Testing and Validation Services

cleanroom-testing-and-validation

It is worth noting that these classes provide a starting point for clarifying what standards are required for a particular cleanroom, they do not always give the full picture. Actual standards are set by a combination of different factors relating to the specific application, and may fall somewhere between the levels specified in these standards.

APT Cleanroom Testing is an independent  clean room services contractor, qualified to carry out clean room validation for all classes of facility, to ensure that not only are your facilities validated and maintained to the required levels, but that your customers and clients can have complete trust in the quality of your clean room processes.

I hope the above information was informative. If you would like some more information in regards to our cleanroom testing service please don’t hesitate to contact Darren directly on 07775623464.

APT Cleanroom Testing provides clients with a reliable and proactive clean room testing service. If you would like to know more about our particulate testing service and/or  HEPA filter testing service to cleanrooms, please don’t hesitate to contact us at:  info@airpressuretesting.net

Our Cleanroom Testing Process

Our Cleanroom Testing Process

To ensure that your clean room environment is working effectively a number of factors relating to the air supply coming from your ventilation need to be tested. These tests apply to every type of clean room, whether used for the manufacture of pharmaceutical products, sterile and aseptic or food production.

We will need to test the quantity of air to ensure that there is enough to dilute or remove any contamination generated within your clean room, and we will need to test the quality of the air to ensure that it is not adding to any contamination, rather than removing it.

clean-room-testing

We also need to test the flow of the air to ensure that it is moving from clean to less clean areas, minimising the movement of any contaminated air into your clean area, and also to ensure there are no areas of the room with high concentrations of pollutants.

In order to carry out these cleanroom tests, for every clean room we are working in, we will measure and check:

  1. Air Tightness Testing – to check your room envelope is air tight and not leaking.
  1. Air Supply and Extract Quantities – If your air supply is unidirectional we will measure and record the air velocity.
  1. Differential Pressure – Here we will be testing to ensure that the air in your clean room always moves from clean to less clean areas.
  1. Filter Installation Leak Testing – Your ventilation system’s high efficiency particulate air (HEPA) filter can be tested to ensure their integrity.
  1. Containment Leak Testing – We will check the construction of your clean room to ensure that no airborne contamination can occur via leaks from higher pressure work areas adjacent to it.
  1. Air Movement Control – Studying the movement of the air within your clean room we will check that there is sufficient air movement to dilute or remove pollutants, preventing any contamination build-up.
  1. Room Recovery – Reviewing the effectiveness of airflow we will measure how quickly a clean room recovers to its normal operating cleanliness following a release of particulate contaminant.
  1. Airborne particles and microbial concentrations – Finally, we will carry out measurements to ensure that the concentration of particles and micro-organisms is compliant with the specification set out for your clean room.
  1. Temperature, Relative Humidity – We may also need to carry out tests on temperature, relative humidity, and the heating and cooling capabilities of the room, as well as noise, lighting and vibration levels.

If you have a clean room that requires particulate monitoring or any of the above testing then please get in touch with us as soon as possible as we should be able to offer you an expedient solution for your cleanroom testing and cleanroom certification.

hepa-filter-integrity-testing

We can also offer maintenance programmes to ensure your cleanroom is in compliance with the corresponding ISO standards– it’s why we place such emphasis on the process of ‘expert intervention’.

Please contact us at: info@airpressuretesting.net  or phone Darren directly on: 07775623464.

Acoustic Terminology M-S

Acoustic Terminology M-S

Our previous blog explained the  of acoustic terminology, this blog covers  M-S.

Mass

This is a physical quantity that expresses the amount of matter in a body. Walls and floors may be described in terms of the surface density (mass per unit area, kg/m2) of the wall face or the floor surface, which is the sum of the surface densities of each component of the construction. The density of materials is expressed as mass per unit volume, kg/m3, which can be provided via the core structure and linings such as in-situ concrete or solid dense block walls.

Mass per unit area (or surface density)

This is is expressed in terms of kilograms per square metre (kg/m2). This is often used to describe boards, panels, flooring and dry linings (see gypsum based board).

Resilience

This can reduce structural vibration transmission and still maintain material performance and overall dimensions, examples include floating floor treatments such as resilient battens or cradles, or resilient ceiling bars.

Resilient ceiling bars

This acoustic solution is generally metal based and vary in thickness from 11 mm to 30 mm. They are mounted perpendicular to the joist span direction and can increase both airborne and impact sound insulation. Care should be taken to ensure that the ceiling board fixings into the resilient bar do not come into contact with the joists and reduce the potential performance.

Resilient noggin

This is a small section of resilient ceiling bar which is used to assist in bracing non load bearing partitions.

Rw

This is a single-number quantity (weighted) which characterises the airborne sound insulation of a building element from measurements undertaken in a laboratory, in accordance with BS EN ISO 717-1: 1997

Sound Insulation Testing

Sound Insulation Testing is required near the end of a development to show that the performance of the party wall and floor partitions meet the standards as stipulated in Building Regulations Approved Document E. The testing methods for airborne and impact sound insulation is in full accordance with the suggested methods presented in BS EN ISO 140-parts 4 & 7: 1998.

Stiffness

This is can improve low frequency sound insulation, for example in floors, by reducing the potential for deflection or movement of the primary structure, therefore the correct spacing and depth of joists is important.

If your project requires some acoustic design input and/or sound insulation testing please don’t hesitate to contact us at info@aptsoundtesting.co.uk or call Darren direct on 07775623464 or visit our website at: www.aptsoundtesting.co.uk

Acoustic Terminology F – L

Acoustic Terminology F – L 

Our previous blog explained the C-F of acoustic terminology, this blog further covers F – L.

Following on from our previous blogs which gave a brief description of

Flanking strip or edge strip

This is a resilient strip using foamed polyethylene normally 5 mm thick, which is located at the perimeter of a floor to isolate the floor boards from the walls and skirtings.

Flanking transmission

This is airborne or impact transmission between rooms that is transmitted via flanking elements and/or flanking elements in conjunction with the main separating elements. An example of a flanking element is the inner leaf of an external wall that connects to the separating ‘core’ of a wall or floor.

Flexible closer

This is a flexible cavity stop or cavity barrier which seals the air path in cavities linking adjoining dwellings.

Floating floor treatment (FFT)

This is a timber floating floor system which may use battens, cradles or platform base, all of which use a resilient layer to provide isolation from the base floor and adjacent wall elements.

Gypsum based plasterboard

This is a dry lining board applied to walls, ceilings and within floating floor treatments which has gypsum content. It may also have fibre reinforcement within the board.

Impact sound

This is sound which is propagated from a noise source through a direct

medium. An example of this is footfall on a floor.

Impact sound transmission

This is sound which is spread from an impact noise source in direct contact with a building element.

Isolation

This is a strategy to limit the number and type of rigid connections between elements of construction.

 L’nT,w

This is the weighted standardized impact sound pressure level. A single-number quantity (weighted) to characterise the impact sound insulation of floors, in accordance with BS EN ISO 717-2: 1997.

If you have a project that requires our acoustic design service and/or sound insulation testing please contact us at info@aptsoundtesting.co.uk or youhone Darren Direct on 07775623464. You can also visit our website at: www.aptsoundtesting.co.uk