EN 514-2018 pdf download.Plastics – Poly(vinyl chloride) (PVC) based profiles- Determination of the strength of welded corners and T-joints.
6.1 Welding of the corner test specimen
The test specimen is a welded corner with an angle of (90 ± 1)°.
Two lengths of profile cut at 45° are heat welded.
6.2 Welding of the T-joint test specimen
The test specimen is a welded T-joint with an angle of (90 ± 1)°. The T-joint is fabricated by heat welding one piece of, for instance, sash or outer frame profile at least 500 mm long and one piece of, for instance, transom profile at least 400 mm long.
Before welding the sash or outer frame profile is notched at 2 x 450 to a depth in accordance with Formula (1):
0,5•(w—s) (1)
where
w is width of transom profile.
s is welder head stroke.
The transom profile end is sawn into a symmetrical 90° point.
The position of the 90° notch in the sash or frame profile is such as to leave a minimum 400 mm leg measured from the top of the transom profile (see Figure 2).
NOTE The document DVS 2207-25:1989-10. C1ausi2 to contains Information about welding procedures.
6.4.2 The short arm of the T-joint test specimen is cut off level with the outer face of the stem to produce a 900 corner. Further preparation of the corner is in accordance with 6A1 (see FigureA).
6.5 Number of test specimens
A minimum of three samples per profile type, all made on the same welder head, shall be tested to obtain a mean value.
7 Conditioning
The test specimens shall be conditioned at (23 ± 5) °C for at least two hours immediately prior to testing.
8 Procedure
8.1 Test temperature
The test is carried out at a temperature of (23 ± 5) °C.
8.2 Tensile bending test
8.2.1 Clamp the test specimen In the apparatus as shown in Ejgurcil or 2. Contoured support blocks may be used, if necessary, to limit twisting.
82.2 Apply the load to the test specimen in such a way that the speed of application is 50 mm/mm.
8.2.3 Continue until the test specimen fails.
8.2.4 Note the failure load F1 and calculate the failure stress in accordance with AnmA.
8.3 Compression bending test
8.3.1 Place the test specimen on the trolley as shown in Figir..3 or 4. In order to avoid excessive deflection, the open frame end of the T-joint can be supported in the corner area by inserting a cavity filling block (e.g. a piece of metal reinforcement or a wooden block).
8.3.2 Apply the load to the test specimen in such a way that the speed of application Is 50 mm/mm.
8.3.3 Continue until the test specimen fails.
8.3.4 Note the failure load F and calculate the failure stress in accordance with Aniic&A.
9 Test report
The test report shall include the following information:
a) reference to this document (i.e. EN 514);
b) the name of the test laboratory;
c) full identification of the profile(s);
d) Identification of the joint:
1) the type of the joint (corner orT-joint);
2) the presence or absence of welding sprue (bead);
3) if more than one welding head is in use, the nominated head;
where
F Is the failure load determined by tensile bending testing, expressed in N;
L is the distance between the corner in the highest flange and the point of application of the load, expressed in mm;
Wis the moment of resistance in the loading direction = 1/c, expressed in mm3
I is the moment of inertia about the neutral axis ZZ (see IügureA.1) of the cross section of the profile given by the manufacturer, expressed in mm4 for T-oints with different profiles, the lower moment of inertia shall be used;
e is the distance between the critical point A and the neutral axis ZZ (see EigurcAd), expressed in mm; o is the failure stress by tensile bending, expressed in N/mmZ.
A.2 Compression bending test
The failure stress of a welded corner or T-joint depends on the failure load, the profile geometry and the test arrangement (see Figure 3 or 4). It is calculated by the formula:
a =i[(a/2_c/.Ji)/2W] (A.2)
where
F is the compression bending failure load, expressed in N;
Wis the moment of resistance in the loading direction = I/e, expressed in mm3
I is the moment of inertia about the neutral axis ZZ (see EigureAd) of the cross section of the profile given by the manufacturer, expressed in mm4 for T-joints with different profiles, the lower moment of inertia shall be used;
e is the distance between the critical point A and the neutral axis ZZ (see Figure Al), expressed in mm;
a is the distance between the axes of rotation of the carriages = (400 ± 2) mm;
is the failure stress by compression bending, expressed in N/mm².EN 514-2018 pdf download.