ASTM D470 PDF
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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At the end of this period, remove the specimen from the water. Designate the insulation area in square inches or ashm millimetres of a in.
Then, with the water as the ground electrode, apply the voltage between the conductor and the water. This test provides useful data for research and development, engineering design, quality control, and acceptance or rejection under speci? The test voltage is permitted to be of either polarity. To determine the test to be made on the particular insulation or jacket, refer to the product speci? You may find similar items within these categories by selecting from the choices below:.
Insert a manometer in the outlet pipe to indicate pressure in the test chamber.
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. The current generated in the photoelectric cell is ampli? The thickness of the test specimen shall be not greater than 0.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as aatm of the standard.
Perform tests between 24 h and 60 days after crosslinking unless agreed to by the manufacturer.
To determine the test to be made on the particular insulation or jacket, refer to the product specification for that type. See Test Method Astmm When the lot consists of more than two coils or reels and less than 20 coils or reels, make at least one determination of the thickness on each of two coils or reels taken at random.
Take care not to handle the insulation. Application of Voltage to Cable The physical test values give an approximation of how the insulation will physically perform in its service life. Physical tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under speci?
Insulation Resistance Tests on Completed Cable. This test is not necessary for non-shielded conductors rated up to V if the dc voltage test described in The set is the difference between this length and the original 2-in. Physical Test Procedures These tests are normally performed in the factory and are used for product acceptance to speci?
ASTM D470 – 13
If necessary, obtain the values from a table giving the areas of segments of a unit circle for the ratio of the height of the segment to the diameter of the circle. Increase the applied voltage sufficiently to indicate detector response to d4470 discharge, but do not exceed the ac test voltage speci?
Use appropriate means, such as exhaust vents, to reduce ozone concentrations to acceptable levels in working areas. Because of qstm it is important to measure the concentration of ozone in the atmosphere, using commercially available monitoring devices, whenever the odor of ozone is persistently present or when ozone generating conditions continue. Maintain a pressure of approximately 1? Dust the upper half of each specimen.
Water absorption tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under speci? The use of a commercially available emergency spill kit is recommended r470 a spill occurs.
Order of Testing Make thorough checks after spills. When the full cross section is used, the specimens shall not be cut longitudinally. Remove the conductor from two short lengths of wire by slitting the covering.
Likewise, the elongation is based on the original distance between the gage marks applied to the specimen before immersion in the oil. Asgm rate of air? Place the specimen in the jaws aztm the testing machine with a maximum distance between jaws of 4 in. D — 05?
Make an effort to separate the jacket from the insulation by slitting sstm covering through to the conductor and pulling the jacket and insulation apart by pliers. The amount of A radiation that is available for activating the photoelectric cell is dependent on the concentration of ozone in the measuring chamber. Renew every 2 or 3 days. Determine all weights to the nearest 0.
A number in parentheses indicates the year of last reapproval. Determine the tensile strength and elongation at the same time that the original properties are determined see Section Do not include the thickness of any separator in the v470 of insulation. Take insulation resistance readings at each temperature after equilibrium is established.
ASTM D – 05_百度文库
This measurement contributes data useful for creating a knowledge of the expected life of the cable since the presence of partial discharges frequently results in signi? Tensile strength, tensile stress, and ultimate elongation Permanent set For Aging Tests: Care should be exercised to keep mercury from the hands.
Express the increase in capacitance from 1 to 14 days and from 7 to 14 days as wstm percentage of the 1 and 7-day values, respectively. Find Similar Items This product falls into the following categories. A superscript epsilon e indicates astj editorial change since the last revision or reapproval.