Specifies the partial factor for chemical resistance, A2. If you do not define this value, the software uses the default value of 1.0. The maximum value is 1.0.
The following passage is from ISO 14692-3:2002(E) section 7.4.3 Chemical Degradation.
The effect of chemical degradation of all system components from either the transported medium or the external environment shall be considered on both the pressure and temperature ratings. System components shall include adhesive and elastomeric seals/locking rings, if used, as well as the basic glass fiber and resin materials.
The effect of chemical degradation shall be accounted for by the partial factor A2 for chemical resistance, which is determined according to Annex D in ISO 14692-2:2002. If the normal service fluid is water, then A2 = 1. Reference shall be made to manufacturers' data if available.
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In general, the aqueous fluids specified in the qualification procedures of ISO 14692-2:2002 are among the more aggressive environments likely to be encountered. However, strong acids, alkalis, hypochlorite, glycol, aromatics and alcohol can also reduce the properties of Glass Reinforced Plastic (GRP) piping components; the effect depends on the chemical concentration, temperature and resin type.
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The information from the manufacturers' tables is based on experience and laboratory tests at atmospheric pressure, on published literature, raw material suppliers' data, and so on. Chemical concentrations, wall stresses, reinforcement type and resin have not always been considered. Therefore, the tables only give an indication of the suitability of the piping components to transport the listed chemicals. In addition, the mixing of chemicals may cause severe situations.