CHEMICAL RESISTANCE GUIDE

Denominations thermoplastic materials
Denominations concentrations
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Thermoplastic materialsGasketsOther MaterialsSteels
Name Conc. % Formula Temp. °C PVCU PVCC PE PP-H PVDF
Name Conc. % Formula Temp. °C NBR EPDM FPM PTFE
Name Conc. % Formula Temp. °C HALAR EPOXY PA PEEK PSU CERAMIC
Name Conc. % Formula Temp. °C SS 304 SS 316 HASTELLOY C
Chemical Resistance Classes Three different classes of chemical resistance degree are conventionally used:
class 1: HIGH RESISTANCE The materials belonging to this class are completely resistant against the conveyed fluid according to the specified operating conditions.
class 2: LIMITED RESISTANCE The materials belonging to this class are partially attacked by the conveyed chemical compound. The average life of the material is therefore shorter, and it is advisable to use a higher safety factor the one adopted for Class 1 materials
class 3: NO RESISTANCE All material belonging to this class are subject to corrosion by the conveyed fluid and they should therefore not be used.

The absence of any class indication means that no data are available.