ASTM D668 Standard Test Methods of Measuring Dimensions of Rigid Rods and Tubes Used for Electrical Insulation
ASTM D668電絕緣用硬條和硬管尺度測量標準試驗方法
These test methods are used to measure the dimensions of the rod or tube to determine conformance with specifications on full lengths or cut lengths. The measurements can also be used for manufacturing control, determination of uniformity, dimensional stability, and physical and electrical properties of the rods and tubes.
1. Scope
1.1 These test methods cover the measurement of the dimensions of all rigid rods and tubes used as electrical insulation, the limitations imposed being those of the size range of the more common forms of measuring instruments used.
1.2 Where the number of tests to be made or the specifications covering the rod or tube justify its use, an accurately calibrated "go-and-no-go" ring gage of suitable size may be used.
1.3 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.
2. Referenced Documents (purchase separately)
ASTM Standards
D374 Test Methods for Thickness of Solid Electrical Insulation
D1711 Terminology Relating to Electrical Insulation
D1711 Terminology Relating to Electrical Insulation
Index Terms
dimensions; rigid rods; rigid tubes; wall thickness; warp;
