Model PolyNorme 505
according to NF P 92-505 of 1995

mots-clés :

test – reaction to fire – building – thermalmelting materials – dripping test – M classification


Design and marketing of the dripping test apparatus are subjected to a partnership with LNE (Laboratoire National d’Essais).


The dripping test according to NF P 92-505 is a reaction to fire complementary test for M classification of building and fitting materials. It is used for thermalmelting materials for which some inflamed or not dripping, produced by a heating source, were noticed during the main test. This one can be either the electrical burner test for flexible and thin materials (NF P 92-503), or the radiation test (epiradiator cabinet) for rigid or flexible and thick materials (NF P 92-501).

In principle, cotton wool inflammation at the dripping test leads to M4 classification. If the cotton wool is not inflamed at the dripping test, the classification obtained at the main test is maintained or the material is downgraded according to whether there was some uninflamed or inflamed dripping during this same main test. In case of holing without inflammation or with short time inflammation at the main test, this outline is also applied to the complementary flame persistency test (NF P 92-504) when there was again some uninflamed or inflamed dripping during this complementary test.



The dripping test involves submitting, under defined conditions, the test piece to the action of an epiradiator-type heat radiation source, and possibly producing :

• Evolved gas inflammation
• Uninflamed or inflamed dripping
• Cotton wool inflammation





The dripping test apparatus model PolyNorme 505 comprises the following elements put together on a common base :

• At the upper part of the first stand is placed the epiradiator-type heat radiation source of 500 W power rating, which radiant surface is made of a translucent vitreous fused silica disk of 100 mm diameter. A movable handle device allows to slightly lift up the epiradiator support to rotate at 90° in the horizontal plane, in order to remove it from the test piece.

• The second stand bears an adjustable in height assembly with at the upper part the test piece support and at the lower part the drop receptacle, these two parts being 300 mm apart. The test piece support is made of a metal ring on which lies a plane circular grid in stainless steel wire. The drop receptacle is composed of a small dish which flat bottom is entirely covered by cotton wool.

• A guiding mark bound up with the epiradiator support and a graduated metal rule fixed to the pole of this second stand allow to adjust the distance between the radiant surface of the epiradiator and the upper face of the test piece.


The accessories included at the delivery for the electrical power measurement and supply of the epiradiator are :

• An autotransformeur to control the serviceable voltage
• A wattmeter to display the effective power.


The set value of the epiradiator must be adjusted between 440 and 480 W according the one mentioned in the official calibration certificate delivered by an accredited laboratory.

N.B. Are not included in the supply of the PolyNorme 505, a voltage regulator, a stopwatch, a hood nor an analytical balance which are usually available in a laboratory. Nevertheless it is still possible to get these accessories on request.


Technical aspect :

• Electrical characteristics of the wattmeter :
• Display resolution : ± 1 W
• Maximum serviceable power : 1 kW
• Maximum on-line intensity : 5 A
• Power supply : single-phase 220 V, 50 Hz

• Base dimensions : 425 x 300 mm
• Apparatus maximum height : 680 mm
• Apparatus net weight : about 13 kg (including epiradiator)
• Included accessories net weight : about 9 kg






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“25/05/2007: AIS is searching for agents in the areas applied to fire-testing equipments (Class M, Polynormes, Glow Wire, LOI, Ignitability Apparatus) and Lab combustion systems (Carbon Black)”

©2007 | AIS - droits réservés

Spécialiste de la mesure industrielle et des essais normalisés, AIS assure la fabrication et la distribution dappareils pour la mesure et le contrôle (capteurs de température et d'humidité, stroboscopes, débimètres massiques) et pour l'essai des matériaux (extrudeuses et mélangeurs internes, presses à plateaux chauffants et mélangeurs à cylindres, appareils et machines d'essai de traction , de réaction au feu, rhéologiques (melt-indexeurs et rhéomètres capillaires), thermomécaniques (HDT-Vicat), etc.