ASTM D1048 Test Fixture

Description

ASTM D1048 – Standard Specification for Rubber Insulating Blankets

 

ASTM D1048 covers acceptance testing of rubber insulating blankets for protection of workers from accidental contact with live electrical conductors,

apparatus, or circuits.

Two types of blankets are provided and are designated as Type I, not resistant to ozone, and Type II, resistant to ozone.

Five classes of blankets, differing in electrical characteristics, are provided and are designated as Class 0, Class 1, Class 2, Class 3, and Class 4.

Two styles of blankets, differing in construction characteristics, are provided and are designated as Style A and Style B.

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ASTM D1048 / Significance and Use

ASTM D1048 covers the minimum electrical, chemical, and physical properties guaranteed by the manufacturer and the detailed procedures by which such

properties are to be determined.

The purchaser may, at his option, perform or have performed any of these tests in order to verify the guarantee.

Claims for failure to meet the specification are subject to verification by the manufacturer.

Blankets are used for personal protection; therefore, when authorizing their use, a margin of safety shall be provided between the maximum voltage at which

they are used and the proof-test voltage at which they are tested.

The relationship between proof-test voltage and the nominal maximum voltage at which blankets shall be used .

Work practices vary from user to user depending upon many factors.

These factors may include, but are not limited to, operating system voltages, construction design, work procedures and techniques, weather conditions, etc.

Therefore, except for the restrictions set forth in this specification because of design limitations, the use and maintenance of this equipment is beyond the scope

of this specification.

It is common practice and the responsibility of the user of this type of protective equipment to prepare complete instructions and regulations to govern the

correct and safe use of such equipment.

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ASTM D1048 / Physical Tests

Perform physical tests to determine the physical properties . Condition the blanket samples by storing in a flat position for at least 24 h at room temperature.

Perform the tensile strength, elongation, and tension set tests in accordance with Test Methods ASTM D412.

The test specimen shall conform in dimensions to Die C. The elongation in the tension set shall be 400 %.

Perform the tear resistance test in accordance with Test Method ASTM D624.

The test specimen shall conform in dimensions to Die C of Test Method ASTM D624.

Perform the puncture resistance test to determine the ability of the blanket to withstand puncture.

Perform the drape stiffness and flex stiffness tests in a manner similar to the method specified in Test Methods ASTM D1388.

Use Option A, Cantilever Test, of Test Methods ASTM D1388 as the test method.

Drape stiffness is a measure of how a material will bend under its own weight, and is referred to as “Bending Length” in Test Methods ASTM D1388.

Flex stiffness measures how stiff a material will feel when flexed, and is called “Flexure Rigidity” in Test Methods ASTM D1388.

*** Before conducting ASTM D1048 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.

 

***PARSROS  offers several types of grips and fixtures which will enable you to perform a variety of tests

  that are accurate and repeatable.