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Standards Development
The method of classification given in this part of ISO 4433 serves to determine the chemical resistance of polyolefin pipes, fittings and valve components designed for the conveyance of chemicals in the absence of pressure and stress such as earth loads, dynamic 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, taken from such pipes, fittings and valve components, in chemicals. The test is carried out in accordance with ISO/DIS 4433-1.
This part of ISO 4433 is also applicable to polyolefin sheets as appropriate.
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