Toxicity/ Corrosivity

Toxicity Test Apparatus NES 713

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U.K. NAVAL ENGINEERING STANDARD

The NES 713 is used for the determination of the toxicity index of the products of combustion from small specimens of material.

FEATURES:

  • The Chamber has a steel framework for strength and is constructed from fire retardant grade polypropylene with welded seams and a volume of 0.7 cubic metres.
  • The Door, which gives full access to the Chamber for easy cleaning is constructed from clear polycarbonate sheet, backed with laminate for strength and rigidity.
  • Gas Burner has a spark ignition system which automatically re-ignites should the flame extinguish.
Corrosion Test Apparatus IEC 60754 Part 1 & 2

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Test On Gases Evolved During Combustion of Electric Cables

The International Electrotechnical Commission IEC 60754 Part 1 and Part 2 test is performed to determine the degree of acidity of gases evolved during the combustion of materials taken from electric cables by measuring the pH & conductivity.

Cable users have expressed concern over the amount of acid gas which is evolved when cable insulating, sheathing and other materials are burnt as this acid can cause extensive damage to electrical and electronic equipment not involved in the fire itself.

It has been considered necessary, therefore, to develop an approved method (by extensive round robins) for determining the amount of acid gases evolved by burning cable components so that limits can be agreed for cable specifications.

As the test is not carried out on a complete cable test piece, for a hazard assessment the actual material volumes of the cable components should be taken into consideration.

FTIR Toxicity Test

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ISO 19702, ISO 9705, CEN TS 75545-2

FTT FTIR is an advanced FTIR gas analyser used for continuous gas monitoring in conjunction with FTT’s Cone Calorimeter and Smoke Density Chamber for online measurements of combustion gases in fire tests.

The analysis of gases in fire effluents is very complex and challenging due to the great number of different organic and inorganic chemicals which representative atmospheres can contain.

It is fully configurable to meet the requirements of ISO 19702, ISO 9705 and CEN TS 45545-2. In addition, various process monitoring applications are also possible. Measured components and calibration ranges can be selected according to application.

Toxicity/ Corrosivity Test Apparatus

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ASTM E 1678 - NFPA 269

This instrument (NIBS) uses radiant heat with spark ignition to combust a sample of material and helps to characterise the product by measuring ease of ignition (time), rate of smoke generation (mass loss) and toxicity (gas analysis).

These are essential parameters in the evaluation of the potential fire hazard of products. Future possibility of being up-graded with additional instrumentation to monitor corrosivity.

The overall apparatus consists of a combustion cell and a test chamber, connected by an enclosed passage (chimney). External to the combustion cell, which contains the specimen platform, are radiant heat lamps and a load cell.

The test chamber has provision for colorimetric gas reaction tubes in one side of the chamber. Gas analysis instrumentation is located external to the apparatus, with gas samples extracted from the test chamber. The combustion cell, test chamber and chimney are assembled in such a manner that they may be separated for cleaning.

Toxicity Test Attachment for NBS Smoke Density Chamber

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ABD0031

Using in conjunction with the NBS Smoke Density Chamber, gaseous/volatile test products are drawn from the chamber at any time for analysis through three ports on the top of the chamber.

One of these ports is used to connect to the ABD0031 vacuum box. This test method is used for evaluating materials or constructions used in the interior of aerospace vehicles, but may be utilised for other applications as specified in applicable procurement and regulatory documents.

It is used to measure and describe the properties of materials, products or assemblies in response to heat and flame under controlled laboratory conditions.

Results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use.

Cone Corrosimeter

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ASTM D 5485 - ISO 11907-4

The Cone Calorimeter and Mass Loss Calorimeter can be used to determine the corrosive effect of combustion products when used with a cone corrosimeter.

To do this in accordance with the Standards protocol the combustion products generated in the unit are drawn through a dynamic exposure cell which houses a copper corrosion target.

The change in resistance of the corrosion target is used to assess the corrosive effect of the combustion products generated.