IS 11239 : Part 13 : 1992 Methods of Test for Rigid Cellular Thermal Insulation Materials - Part 13 : Determination of Flammability by Oxygen Index

1 Scope

This standard specifies methods for determining the minimumconcentration of oxygen, in admixture with nitrogen, that willsupport combustion of small vertical test specimens under specifiedtest conditions. The results are defined as oxygen Index values.

Note 1 - It may not be possible to apply these methodssatisfactorily to materials that exhibit high levels of shrinkagewhen heated, for example, highly oriented thin film.

Note 2 - For assessing the flame propagation properties ofcellular materials of density less than 100 kg/m³,attention is drawn to IS 11239 : Part 12 : 1989.

2 References

IS 3069 :1991Glossary of terms, symbols and units relatingto thermal insulation materials

IS 4905 :1968Methods for random sampling

IS 11239 : Part 12 :1989 Methods of test for rigid cellular thermalinsulation materials:Part 12 Horizontal burning characteristics