FOAM TESTING – INFORMATION SHEET
Foam Testing – Essential Requirement for Successful Testing
Foam Testing is a requirement of BS5306, NFPA11 and UKOOA/HSE and is a procedure that should be carried out at least once annually to determine any changes in constitution, specification and characteristics of the foam.
Delta Fire are a Leading Foam Testing House and totally independent.
In order to obtain accurate ‘foam percentage proportioning results’ it is essential to adopt good sample collection procedures, always being careful not to dilute the sample accidentally in the collection procedure by mixing with initial discharge solution, and always collecting a sample after steady state conditions are reached.
Delta’s standard foam testing procedure is detailed to follow but more specific testing is available upon request such as large scale fire tests and full laboratory fire tests carried out in accordance with the UK FOAM DEFENCE STANDARDS.
Please Note: We must be in receipt of suitable samples with all required information attached and a Purchase Order prior to the commencement of any foam testing. Please use the link below to complete the required information forms to be attached to your sample bottles prior to return.
Foam Testing & Samples
There are 3 main types of foam testing we can offer:
1.) FOAM CONCENTRATE TESTING
This is the most common type of testing and involes taking a sample of the foam concentrate to check its properties to see if it is still suitable to use.
2.) REFRACTIVE INDEX FOAM TEST & REPORT
This is where 3 samples are taken: Foam concentrate, Produced Foam and a Water sample. On completion of the test the report will show the percentage of induction measured using the sample provided by the customer. It is essential that the supplied foam concentrate sample and water sample are the same as used to mix and provide the “produced” foam sample for accurate results.
It is vital to take the finished foam solution test sample during steady state conditions. This means running the system for some time and inevitably producing significant amounts of finished foam
Enough time should elapse for the initial pipe contents to be flushed out and the mixing device to ‘settle down’ to a steady pressure and flow condition. This is usually 15 to 20 seconds but can be much more.
Care should be taken to ensure that the early foam production does not contaminate the final sample. For example, in the case of a foam monitor, the initial jet should be aimed well away from the collector and only swung onto target after15 to 20 seconds or however long is needed to reach steady state foam production.
Sampling from the discharge pipe after the closing down of the line pressure can lead to spurious results. The actual foam discharge should be sampled and allowed to drain back into solution.
3.) FIRE TEST REPORT
1 Litre Heavy Duty Foam Sample Bottles available upon request (Product Code: FTS000100)
- 2.0 Litre Foam Concentrate
- 2.0 Litres Produced Foam
- 2.0 Litres Water
Your sample must show clearly which of these three options is enclosed to ensure correct testing.
It is essential that 'Pre-Mixed' Foam Samples are at least 2 Litres in Volume
- Identification of sample type
- Customer name
- Job sheet No.
- Sample number
- Sample taken by...
- Foam type
- Concentration %
- Ship name (if applicable)
- Location sample taken from
It is essential that all information is attached to a clean, dry sample bottle before sending to Delta Fire.
NB. We regret that any foam samples received without the information required as detailed above may incur an additional fee. A surcharge will be applied to reflect the additional Lab time required to identify the sample.
FOAM TESTING CRITERIA
- Specific Gravity
- Surface Tension
- Freeze Point
- 25% Drainage
- Extinguishing Properties
- Burnback Performance