EN 477-2018 pdf download.Plastics – PoIy(vinyl chloride) (PVC) based profiles – Determination of the resistance to impact of profiles by falling mass.
This EN 477 specifies a method for determining the resistance to impact by a falling mass at —10°C of unplasticized poly(vinyl chloride) (PVC-U) profiles.
It is also applicable to PVC-based profiles at specified temperatures/test conditions.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electmpetha.org/
— ISO Online browsing platform: available at htip;JJwwwis Q.rgJ’()1 )
inner web
partition wall connecting two walls of a profile
4 Principle
Test specimens cut from lengths of profiles are subjected to a blow from a mass falling from a known height on the surface at a point mid-way between two inner webs at a fixed temperature.
After testing the profiles are examined visually for failures in the surface tested.
5 Apparatus
An impact testing machine incorporating the following basic components (see Figur.e.i) shall be used:
a) main frame, rigidly fixed In the vertical position;
b) guide rails, fixed to the main frame to accommodate the falling mass and allowing It to fail freely
in the vertical plane;
c) test specimen support, consisting of two rounded off supports (see Figure 2) (200 ± 1) mm apart. The support shall be made from steel and rigidly fixed in a solid foundation or on a table with a mass of more than 50 kg;
d) release mechanism, such that the fatling height of the mass, measured from the top surface of the test specimen to be tested, can be adjusted up to the falling height defined in the referred product
+10
standard with a tolerance of( 0 ) mm (e.g. 1 000 mm, 1 500 mm);
e) falling mass, of (1 000 ± 5) g, which has a hemispherical striking surface of (25 ± 0,5) mm radius. The striking surface shall be free from all imperfections.
6 Test specimens
Ten test specimens, each of length of 300mm shall be taken from a profile.
7 Conditioning
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The test specimens shall be conditioned at a temperature of ( -) °C for at least 1 h before testing. Each test specimen shall be tested wIthin 10 s of removal from the conditioning chamber.
8 Procedure
8.1 The test shall be performed on the surface of the profile, as defined by the referred standard.
8.2 Drop the falling mass from the given height as required in the product standard at a point mid-way between two inner webs.
Where ft is impracticable for the mass to hit the profile in accordance to the above due to its geometry other impact positions for the falling mass should be agreed upon between the profile manufacturer and the testing laboratory.
When due to its geometry1 the profile tend to tilt sideways at the impact of the falling mass, any tilling should be prevented, by attaching additional stays to the two supports.
During the test care should be taken to prevent multiple impacts of the falling mass on the test specimen.
9 Expression of results
The number of test specimens tested and the number of test specimens broken shall be reported for each type of profile.
10 Test report
The test report shall include the following inrormation:
a) reference to this document (i.e. EN 477);
b) the testing laboratory;
c) full identification of the profile;
d) date of testing:
e) the height of the falling mass;
f) the number of test specimens tested;EN 477-2018 pdf download.