Page 57 - INCOLA EXCLUSIVE DATA CATALOGUE

INCOLA Soundproof Piping Systems

8.1 Introduction

The table in this document summarizes the data given in a number of polypropylene chemical
resistance tables at present in use in various countries, derived from both practical experience
and test results.
Source: ISO/TR 10358
The table contains an evaluation of the chemical resistance to a number of fluids judged to be
either aggressive or not towards polypropylene. This evaluation is based on values obtained by
immersion of polypropylene test specimens in the fluid concerned at 20, 60 and 100°C and
atmospheric pressure, followed in certain cases by the tensile characteristics.
A subsequent classification will be established with respect to a restricted number of fluids
deemed to be technically or commercially more important, using equipment which permits testing
under pressure and the determination of the “coefficient of chemical resistance” for each fluid.
These tests will thus furnish more complete indications on the use of polypropylene pipes for the
transport of stated fluids, including their use under pressure.

8.2 Scope and Field Application

This document establishes a provisional classification of the chemical resistance of
polypropylene with respect to about 360 fluids. It is intended to provide general guidelines on the
possible utilization of polypropylene piping for the conveyance of fluids:

• at temperatures up to 20 and 60°C
• in the absence of internal pressure and external mechanical stress
(for example flexural stresses, stresses due to thrust, rolling loads etc.).

8.3 Denitions, Symbols and Abbreviations

The criteria of classifications, definitions, symbols and abbreviations specified in this document
are as follows:
Satisfactory (S): The chemical resistance of Sat.sol: Saturated aqueous solution, prepared
polypropylene exposed to the action of a fluid at 20°C.
is classified as “satisfactory” when the results
of test are acknowledged to be “satisfactory” Sol: Aqueous solution at a concentration higher
by the majority of the countries participating than 10 % but not saturated.
in the evaluation.
Dil.sol: Dilute aqueous solution at a
Limited (L): The chemical resistance of concentration equal to or lower than 10 %.
polypropylene exposed to the action of fluid
is classified as “limited” when the results of Work.sol: Aqueous solution having the usual
tests are acknowledged to be “limited” by the concentration for industrial use.
majority of the countries participating in the
evaluation.

Not satisfactory (NS): The chemical
resistance of polypropylene exposed to the
action of a fluid classified as “not
satisfactory” when the results of test are
acknowledged to be “not satisfactory” by the
majority of the countries participating in the
evaluation.

55