| Test method | Water Temperature ℃ |
Impact angle | Space between nozzle and sample （mm） | Flow rate （L/min） |
Duration of jetting |
| A | 60±2 | 90±2 | 100±1 | 11.3±0.2 | 30±1 |
| B | 60±2 | 90±2 | 100±1 | 11.3±0.2 | 60±1 |
| C | 60±2 | 90±2 | 100±1 | 11.3±0.2 | 60±1 |
For jetting, deionized water should be used.
When using automatic and manual devices, fasten the test specimen so that the water jet impacts as
shown in Figure 3. The jet impacts in the middle above the point of intersection onto the longer one of both cuts/scribes.
Annex A
(normative)
Calibration of the test apparatus
A.1 Apparatus and materials
Ordinary laboratory apparatus, as well as the following.
A.1.1 Temperature measuring device, with sensor, capable of measuring to 0,5 °C.
A.1.2 Balance, weighing to 10 g.
A.1.3 Time measuring device (stopwatch), capable of measuring ± 0,1 s.
A.1.4 Container, for the determination of the volumetric flow rate for at least 20 l of water.
A.1.5 Plastic block, made of polystyrene rigid plastic foam.
The kind of the polystyrene rigid plastic foam shall be agreed by the interested parties.
A.1.6 Length measuring device, capable of measuring ± 0,1 mm.
A.2.4 Calibration of the water jet
The conditions for the calibration of the jetting are in accordance with method B. For the calibration of
the jetting, a stainless steel precision flat film extrusion die with a volumetric flow rate of the nozzle of
6 l/min at 2 MPa (20 bar) and a jet angle 25° is used. This nozzle is required to produce an even liquid
distribution during the entire jetting.
When using an automatic pressure-water apparatus, fasten the polystyrene rigid plastic foam in the
apparatus so that the jet cannot move the block. When using a manual apparatus, fasten the block in a
similar fixture.
After jetting, the length and the width of the impact are measured. See Figure A.1.
The mean length of the impact shall be (73 ± 5) mm and the mean width (8 ± 1) mm on average.