ASTM-D202 2023(Redline)

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D202-23 Standard Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation (Redline)

Published By	Publication Date	Number of Pages
ASTM	2023	62

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Categories: 29.035.10 - Paper and board insulating materials, ASTM

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Description

ASTM D202-23

Redline Standard: Standard Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation

ASTM D202

Scope

1.1 These test methods cover procedures for sampling and testing untreated paper to be used as an electrical insulator or as a constituent of a composite material used for electrical insulating purposes.

1.1.1 Untreated papers are thin, fibrous sheets normally laid down from a water suspension of pulped fibers (usually cellulosic) with or without various amounts of nonfibrous ingredients, and which are calendared, if required, to obtain desired thickness and density. Nevertheless, these test methods are applicable, generally although not invariably, to papers formed by other means, to papers modified (during or after formation) by additions, and to papers given subsequent mechanical treatments such as creping.

1.1.2 As an electrical insulating and dielectric material, paper is considered “untreated” until it is subjected to a manufacturing process such as drying, impregnation, or varnish treatment.

1.1.3 The test methods given herein were developed specifically for papers having a thickness of 0.75 mm (0.030 in.) or less. A number of these test methods are also suitable for use on other materials such as pulps or boards. Refer to Test Methods D3376 or D3394 to determine which tests are applicable to pulps or electrical insulating boards. In the paper industry, some products in thicknesses of less than 0.75 mm are termed “paperboard”. Such products are included within the scope of these methods.

1.1.4 These test methods are applicable to flexible fibrous-mat materials formed from suspensions of fiber in fluids other than water. Thicknesses of these mats approach 2 mm, and the fibers contained are possibly natural, synthetic, organic, or inorganic; fillers that are natural, synthetic, organic, or inorganic; and flexible polymeric binder materials.

1.2 The procedures appear in the following sections:

1.3 The tests for Holes and Felt Hair Inclusions and the Stain Test for Fine Pores, have been removed from this compilation of test methods. These test methods were specific to grades of capacitor paper formerly covered by Specification D1930, which has been withdrawn.

Note 1: This compilation of test methods is closely related to IEC Publication 60554-2. Not all of the individual methods included herein are included in IEC 60554-2, nor are all of the methods in IEC 60554-2 included in this standard. The individual procedures as described in the two standards are in general sufficiently close to each other that it is reasonable to expect that test results obtained by most of the procedures specified in either standard will not differ significantly. However, before assuming that a procedure in these test methods is exactly equivalent to an IEC 60554-2 procedure, the written procedures must be compared closely, and if it seems advisable, test results by the two procedures are compared.

1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See 43.2.1, 71.1, 143.1, 148.1 and 156.1 for specific hazards.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

absorption; acidity; air resistance; alkalinity; aqueous extract conductivity; aqeous extract pH; ash content; basis weight; board; bursting strength; chloride content; conditioning; conducting paths; density; dielectric strength; dimensions; dissipation factor; edge-tearing resistance; fiber analysis; folding endurance; grammage; heat stability; impregnation time; internal-tearing resistance; moisture content; paper; paperboard; particulate copper; particulate iron; permittivity; pH; roll dimensions; sampling; sheet dimensions; silver tarnishing; solvent-soluble content; specific gravity; surface friction; tensile properties; tearing resistance; thickness;

ICS Code

ICS Number Code 29.035.10 (Paper and board insulating materials)

DOI: 10.1520/D0202-23

Additional information

Permittivity	158 to 164
Air Resistance	98 to 101
Dielectric Strength	152 to 157
Reports	14
Silver Tarnishing by Paper and Paperboard	203 to 206
Conducting Paths	138 to 151
Chlorides (Water-Extractable)	165 to 183
Density, Apparent	29 to 33
Particulate Copper	193 to 202
Aqueous Extract Conductivity	55 to 64
Dissipation Factor and Permittivity	158 to 164
Fiber Analysis	74 to 77
Thickness (see Dimensions)	16 to 24
Moisture Content	34 to 39
Ash Content	40 to 44
Impregnation Time	84 to 91
Reagents	4
Solvent-Soluble Matter	65 to 73
Bursting Strength	102 to 107
Edge-Tearing Resistance	126 to 130
Particulate Iron	184 to 192
Dimensions of Sheet, Rolls and Cores	16 to 24
Tensile Properties	111 to 120
Folding Endurance	108 to 110
Heat Stability in Air	131 to 137
Surface Friction	92 to 97
Absorption (Rise of Water)	78 to 83
Procedure	Sections
Acidity-Alkalinity-pH	45 to 54
Conditioning	15
Grammage	25 to 28
Internal-Tearing Resistance	121 to 125
Sampling	6 to 13
ICS Codes	29.035.10 - Paper and board insulating materials