ASTM D349电气绝缘使用叠层圆棒材标准试验方法

ASTM D349 Standard Test Methods for Laminated Round Rods Used for Electrical Insulation
ASTM D349 电气绝缘使用叠层圆棒材标准试验方法

This test method is designed to provide data for the control and specification of materials and for characterization purposes in research and development of new materials. Tensile properties may vary with the size of specimens and the speed of testing. Consequently, these factors along with others noted herein must be controlled where precise comparative results are desired.

1. Scope
1.1 These test methods cover the procedures for testing rigid round rods used in electrical insulation. These round rods include many types made from fibrous sheets of basic materials, such as cellulose, glass, or nylon in the form of paper, woven fabrics, or mats, bonded together by natural or synthetic resins, or by adhesives. Such round rods include vulcanized fiber and thermosetting laminates as well as round rods made from cast, molded, or extruded natural or synthetic resins, with or without fillers or reinforcing materials.
1.2 The procedures appear in the following sections:
1.3 The values stated in inch-pound units are to be regarded as the standard.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific warning statement see 36.2.

2. Referenced Documents (purchase separately)
ASTM Standards
ASTM D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
ASTM D570 Test Method for Water Absorption of Plastics
ASTM D668 Test Methods of Measuring Dimensions of Rigid Rods and Tubes Used for Electrical Insulation
ASTM D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
ASTM D1711 Terminology Relating to Electrical Insulation
ASTM D6054 Practice for Conditioning Electrical Insulating Materials for Testing
Index Terms
compressive strength; dielectric strength; flexural strength; rigid rods; tensile strength; thermosetting laminate; vulcanized fibre; water absorption;

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 来源：防火网　发布时间：12/23/2013 点击次数：1358