ISO 9150:1988

This International Standard specifies a test method designed to evaluate the performance of materials used for protective clothing when such materials are struck by small splashes of liquid metal, especially when molten steel particles are projected against the material.

It applies to any flexible material, or set of materials, designed to protect workers from small splashes of liquid metal. They do not allow conclusions regarding contacts with large splashes of molten liquid.

f Drop frequency, expressed as numbers of drops per minute.

m Mass of a drop, expressed in grams

1. Device for producing drops of molten metal
2. measurement sensor
3. Clamping frame for test sample
4. Steel rods. Steel rods of linear density Q, =0.5 g/cm + 0.2 g/cm

Cut a 120 mm x 20 mm test piece from the laboratory sample at a distance of at least 50 mm from the edges of the sample.

Fold the edges of the test sample to a distance of 15 mm from both ends and staple them to allow the sample to be attached to the clamps.

Cut at least 10 test specimens.

24H 65% HR + 2% HR a 20ºC + 2ºC

• Before performing the test bring the temperature of the sensor to ± 2 of the ambient temperature
• Preparation and adjustment of the metal rod in the proper position
• Adjust the motor speed so that the steel rod is fed at the rate. The first drop is excluded from the count
• Secure the test sample to the sample holder by means of the clamps so that the sensor is completely covered
• For each test, record the number of drops, X, required to raise the temperature on the inside of the test sample by 40 k. Test a total of 10 samples, discarding the first.
• Start the test with the next drop.
• Aim for the lowest practical gas flow rate to minimize the risk of metal droplets flying or spattering into the flame. Position the rod so that it is at the hottest point of the flame, i.e. just beyond the tip of the dark blue cone
• Position the sample holder so that the vertical distance between the center of the burner jet and the horizontal center line of the sensor is 110mm + 10mm. Set the distance between the axis of the rod and the vertical plane of the face of the sensor to 60 mm + 10 mm. Adjust the distance between the axis of the rod and the plane through the vertical center line of the sensor perpendicular to its face to 15 mm + 10 mm on the opposite side of the burner jet.
• Tilt the drop guide at a 45º angle. Set the distance between the outer face of the test sample and the tip of the guide to 1.5mm + 1mm.
• Secure the test sample to the sample holder by means of the clamps so that the sensor is completely covered. Attached counterweight(s). If the test sample has an external face, this face will be exposed to droplets. For each test, record the number of drops, X, required to raise the temperature on the inside of the test sample by 40 k. Test a total of 10 test samples.

The test report will include the following data:

1. Reference, sample description and areal density
2. Reference of this International Standard
3. Mean value of the results obtained
4. Remarks flames
5. Any incident detected that may have affected the test results or may represent an aggravation of potential hazards