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ISO/DIS 4433-4

Thermoplastics piping systems — Preliminary evaluation of the resistance to chemicals — Part 4: Poly(vinylidene fluoride) (PVDF) and Ethylenechlorotrifluoroethylene (ECTFE) piping components

General information

40.20     Mar 11, 2026

ISO

ISO/TC 138/SC 3

International Standard

23.040.20  

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Scope

The method of classification given in this part of ISO 4433 serves to determine the chemical resistance of PVDF and ECTFE pipes, fittings and valve components designed for the conveyance of fluids in the absence of pressure and stress (e.g. due to earth loads or traffic loads, dynamic or internal stresses).
To determine the chemical resistance, the method uses the change in mass and the changes in tensile properties which result from the storage of test pieces in chemicals. The storage test is carried out in accordance with ISO/DIS 4433-1.
This part of ISO 4433 is also applicable to PVDF and ECTFE sheets as appropriate

Life cycle

PREVIOUSLY

PUBLISHED
ISO 4433-4:1997

NOW

PROJECT
ISO/DIS 4433-4
40.20 DIS ballot initiated: 12 weeks
Mar 11, 2026

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