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Split Tear Strength – ASTM D The force per unit thickness required to tear a material. Test specimens are placed in a tensile test machine. The jaws are set. This standard is issued under the fixed designation D ; the number 1 These test methods are under the jurisdiction of ASTM Committee D-9 on. Electrical. ASTM D Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable.

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Collection of Sample Worldwide Standards We can source any standard from anywhere in the world. Equip the buffing apparatus with a cylindrical table arranged so that it can be advanced very gradually.

Current edition approved September 1, Jackets with a thickness of less than 0.

Maintain this potential continuously for at least 6 h. Zstm one length of covering into the clamps of the buffing apparatus so that it lies?

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Their use is recommended also for resonant grounded systems.

This applies either to a straight test specimen or to one stamped out with a die, and assumes that corrugations have been removed. Age specimens having cable tape applied prior to crosslinking with such tape removed.

Use the coefficient furnished by the manufacturer for the particular insulation or determine it in accordance with Section Immersing the sample in hot water for a few minutes just prior to pulling off the jacket often facilitates this procedure. At the end of 1 h period, place the specimen in the oven, allowing both the micrometer and test specimen to remain in the oven for 1 h.

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Accept and continue Learn more about the cookies we use and how to change your settings. Some materials are more susceptible to such discharge damage than others. Determine the tear resistance by dividing the load in pounds or kilograms required to tear the section by the thickness of the test specimen in inches or millimeters.

Center a test specimen 10 in.

ASTM D – 99 Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable

Capacitance, Cold bend, Crosslinked insulation, Dielectric withstand, Dissipation factor, Flammability, Heat distortion, Heat exposure agingHorizontal flame test, Insulation resistance, Mineral filler content, Oil immersion, Ozone resistance, Partial-discharge extinction level, Permittivity, Set test, Surface resistivity, Tear test, Track resistance, U-bend discharge, Water absorption tests.

Accurately weigh the solution with the added iodine. Maintain a pressure of approximately 1? Make the measurement aastm a voltage of to Vdc. Maintain the vessel completely full of asgm during the immersion period.

Introduce the mercury at one end of the specimen between the insulation and the tinned surface of the conductor, with the specimen inclined on a support ashm the end to which the mercury is applied at the top.

For shielded cables, the shields shall be grounded. From this specimen, remove the tape applied before crosslinking.

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Make spot checks periodically around operations where mercury is exposed to the atmosphere.

Thoroughly instruct all operators in the proper way to conduct tests safely. Place the two halves of the split end of the test specimen in the jaws of the tension testing machine and separate the jaws at the rate of 20 in.

ASTM D470 – 13

No activity has been planned to develop such information. From this sample prepare test specimens 1 in. Determine all weights to the nearest 0. The use of rubber gloves is recommended for handling specimens as in 8. Ozonization atm the air is accomplished in a generator consisting of a pair of concentric electrodes, separated by a thin glass dielectric, between which voltage is applied.

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This permits easy access to the interior and also the inspection of specimens, without aetm the chamber during test. The separation of the insulation results from the amalgamation of the tin of the conductor with the mercury. Direct Measurement with an Ozonometer Unless otherwise indicated, the intention is that all reagents conform to the speci?

Take care not to handle the insulation. Then remove it from the desiccator, weigh to the nearest 10 mg, and record the weight as W.

If either such specimen fails to pass this test, the lot shall be rejected. Water Absorption Test on Fibrous Coverings. Originally approved in If both such second specimens pass this test, the lot of cable except the length which was rejected because of failure of the?

Link to Active This link will always route to the current Active version of the standard. Physical Tests of Insulation and Jacket Compounds. Move the burner up to the specimen so that the tip of the inner blue cone just touches the specimen at a point midway between the supports. For the set test mark the specimens with gage marks 2 in. Thermal tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under speci?