Polyurethane Systems for building and industry

Fire safety of polyurethane systems

Polyurethane, like all polymers, is an organic material and therefore combustible. However, there are polyurethane foams classified from C, s3-d0 to E, which must be applied according to the risk to which they will be exposed and in accordance with the requirements of the corresponding regulations.

The reaction to fire of construction products is measured according to Euroclasses. The classification of products according to this standard allows tests in a final application condition, i. e., if the polyurethane is going to be covered by another material (laminated gypsum, fibrocement, metal plate...), the test and classification will be carried out by assembling the samples in such way.

System manufacturers have to certify, by means of a test certificate, which is the maximum thickness reached by their systems in the different classifications according to the different conditions or final applications of use.

Seguridad de los sistemas de poliuretano frente al fuego 1.jpg

 

Classification in end use application

The European Commission Guide G relating to the Construction Products Directive and the UNE-EN 13501 standard for reaction-to-fire classification according to Euroclasses, cover and require the classification in final application of use at the same time that refer to the product standards in order to set the conditions of assembly and fixation of the test and the validity range of the results.

In order to be able to test products in final application of use, there is the test method described in the UNE-EN 13823 Standard, the SBI, and in order to transfer the information obtained to the market there is the CE Marking as well as the additional information, where the classification of the product in final application of naked use must be included, and where the classifications of other final applications of use that may be of interest to the manufacturer of such product may also appear. 

ASSEMBLY

COMPOSITION

RESULT

Naked

6 mm of standard fiber cement substrate sheet

30 mm polyurethane foam 33 kg/m³

E

Cement rendering

6 mm of standard fiber cement substrate sheet

30 mm polyurethane foam 33 kg/m³

Metal chicken wire

15 mm of cement mortar

B-s1,d0

Gypsum plaster

6 mm of standard fiber cement substrate sheet

30 mm polyurethane foam 33 kg/m³

Metal chicken wire

15 mm of plaster

B-s1,d0

Metal cover

30 mm polyurethane foam 33 kg/m³

0.6 mm galvanized corrugated sheet metal

B-s3,d0

Fiber cement cover

30 mm polyurethane foam 33 kg/m³

6 mm corrugated fibre cement

B-s2,d0

Wood panel

6 mm of standard fiber cement substrate sheet

30 mm polyurethane foam 33 kg/m³

40 mm ventilated air chamber

16 mm MDF wood board B-s2, d0

B-s2,d0

Laminated gypsum board

6 mm of standard fiber cement substrate sheet

30 mm polyurethane foam 33 kg/m³

40 mm ventilated air chamber

15 mm laminated plaster

B-s1,d0*

*Gypsum board laminated on Euroclass E insulation: B-s1, d0

ATEPA and IPUR table of SBI tests nf reaction to fire of projected polyurethane in final application of use.

Seguridad de los sistemas de poliuretano frente al fuego 2.jpg

 

Conclusions about fireproof polyurethane tests

  • The new European standards cover and require the classification in final application of use and provide the prescriber with real information on the behaviour of the product in case of fire.
  • The knowledge of both the behaviour and classification of the products in end-use application brings higher levels of safety to the market.
  • The final application of use takes into account joints, fixings, coatings and protections, so that depending on these, there may be different classifications for the same product.
  • The most unfavourable end use applications among the most usual ones have been selected for this study.. The result obtained by the projected polyurethane foam in all the final applications studied is Euroclass B.
  • These results on polyurethane foam are supported by the low accident rate demonstrated.

 

DOWNLOAD. Video of a real case application of polyurethane systems

Related posts

Comments

FEATURED POST

Phono Spray I-905

Injection moulded polyurethane insulation for facades: Phono Spray I-905

Injected polyurethane is an ideal material for thermo-acoustic renovations of façades and dividing walls between dwellings, since it does not require large machinery for its installation and it is not necessary to demolish constructive elements.

Read more

MOST VIEWED ARTICLES

SUBSCRIBE TO OUR BLOG

More about radon
ther
Budma 2018, Poznan Poland