ISO 9150 pdf download – Protective clothing一Determination of behaviour of materials on impact of small splashes of molten metal.
Connect the sensor to en appiopnete electron.c device which oon’.erts the seistance Change 10 temperature difference. It shall be capable of decriminsting ± 0,5 K.
5.4 Holding frame for the test specimen
The gpecinw-hnkeng frame elan supports the sensor (5.3), it $ows the ecimen to be matnialned under tension by a system of puky-cl.na and by a Countsrwhght Is.. figure 5).
Use counterwleghts of lThg ± 5g on both dee of the test specimen or. alternatively, fix one and of the test specimen ia damp and attach a 175 g ± Sg oounterweight to the other. The position of the so nitoicler adiustable horiionty and vertically.
5.5 Steel rode
Steel rode of linear density , 0,5 9/cm ± 0.2 9/cm.
6 Specimen
Cut test specimens rnaseurlng 120 mm x 20 mmfrcni the lab’ oratory sample at a distanc. of at beet ) mm from the edge. of Lb. sample. Fold over the edges of the set epeciman at a distance of 15 tom from both ends and staple them so as to enable the specimen to he fiertenad to the clamps (see figure 6).
Cut at Peat 10 teat specimen.
Condition the test specimens for 24 h In accordanc, with ISO 1: 1973, option 2.2.1 I % RH ± 2 % RH at 20 °C i 2 °C).
7 Procedure
WARNING Health and safety of opar.tore
On exposure to molten metal, organic materials may pytolys. with formation of toxic or noxious products. Therefore, tests according to (his method shall be carried out In an enclosure where adequat. air extraction I. .vallabl upon completion of each teat.
Protective gloves shall be worn when handing hot objects. if cloe up inspection of apparatu. or test specimen is required during testing, eye end face protection should be proinded.
Catch metal drops In a suitable receptacle underneath the specimen holder.
the sensor to 60 mm ± 10 mm. Adjust the distance between the axis of the rod and the plane through the vertical centre-line of the sensor perpendicular to its face to 15 mm ± 10 mm on the side opposite to the burner jet (see figure 1).
Incline the drop guide (5.2) at an angle of 45°; ensure that the metal drops are easily collected and that they impinge on the test specimen at the level of the sensor. Set the distance between the external face of the test specimen and the tip of the guide at 1,5 mm ± 1 mm (see figure 1).
Attach the test specimen to the specimen holder by means of the clamps so that the sensor is entirely covered. Attach the counterweight(s). If the test specimen has an external face, this face shall be exposed to the drops.
For each test, note the number of drops, X, required to raise the temperature on the internal face of the test specimen by 40 K. Test a total of 10 test opecimens.
To obviate clogging of the drop guide with the first drop (which may be oversized if the rod has cooled from the previous test with a drop about to fall) it is advisable to use a paddle or shutter to deflect the initial drop away from the chute. Commence the test with the next drop.
8 Test report
The test report shall include the following particulars:
a) reference and description of the sample from which the test specimens were taken, in particular its surface density, in grams per square metre;
b) a reference to this International Standard;
C) the results obtained on each of the test specimens and the mean value of the results;
d) observations of any noteworthy phenomena (smoke, flames, etc.);
e) procedural details not specified in this International Standard as well as any incident noticed which may have affected the test results or which may represent an aggravation of possible hazards.
ISO 9150 pdf download – Protective clothing一Determination of behaviour of materials on impact of small splashes of molten metal
