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ASTM D4063-99

Current Revision

Standard Specification for Pressboard for Electrical Insulating Purposes

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1.1 This specification covers electrical insulating board, manufactured from kraft, cotton, or kraft and cotton pulps. This board is intended for dielectrical or structural purposes in transformers and other electrical apparatus.

1.2 Electrical insulating boards are most commonly referred to (and will be referred to herein) as pressboard. Other terms used for pressboard include transformer board, fuller board, and presspan.

1.3 This specification covers pressboard having a nominal thickness of 0.030 to 0.315 in. (0.81 to 8.0 mm). For thinner material refer to Specification D1305.

1.4 The maximum thickness available will differ with the type and the manufacturer. The maximum sheet size will differ with the thickness, type, and manufacturer.

1.5 Pressboard shall normally be plied wet without pasting. Unless specified by the purchaser, this specification does not include pressboard comprised of two or more sheets that have been laminated together using an adhesive.


SDO ASTM: ASTM International
Document Number D4063
Publication Date Nov. 10, 1999
Language en - English
Page Count 4
Revision Level 99
Supercedes
Committee D09.19
Publish Date Document Id Type View
Nov. 10, 1999 D4063-99 Revision
May 1, 2022 D4063-99R22 Reaffirmation
May 15, 2016 D4063-99R16 Reaffirmation
Oct. 1, 2009 D4063-99R09 Reaffirmation
Nov. 10, 1999 D4063-99R04 Reaffirmation