ASTM D3376 - 18

    Standard Test Methods of Sampling and Testing Pulps to be Used in the Manufacture of Electrical Insulation

    Active Standard ASTM D3376 | Developed by Subcommittee: D09.01

    Book of Standards Volume: 10.02


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    Significance and Use

    8.1 The conductivity of the water extract of electrical grade pulp results from electrolytic impurities in the pulp potentially present as ionizable acids, bases, salts, or a combination of these. The presence of electrolytic impurities in electrical insulation is undesirable as they tend to lower insulation resistance and have corrosion-producing tendencies under conditions of applied potential. When comparing test data, note that the extract conductivity of pulps, especially those of high purity, changes with time after manufacturing in some instances. This test is useful for routine acceptance testing, the comparison of different pulps, and research work.6

    1. Scope

    1.1 These test methods cover the sampling and testing of cellulosic pulps for use in the manufacture of electrical insulating papers and boards or in the direct application of pulp fibers as insulation to electrical conductors.

    Note 1: Consider the significance of any one pulp property test method, as set forth herein, with discretion depending on the product made from the pulp.

    1.2 Sections on Reagents, Sampling, and Report are integral parts of each of the individual test methods that follow.

    1.3 Each test method is described as being a measure of either a bulk property of the pulp or a property of a handsheet formed from the pulp.

    1.3.1 Bulk characteristics determinable by these procedures appear in the following sections:

    Procedure

    Sections

    ASTM
    Method
    Reference

    TAPPI
    Method
    Reference

    Aqueous Extract Conductivity

    8 & 9

    D202

    . . .

    Aqueous Extract pH

    10 & 11

    D202

    . . .

    Aqueous Extractable Acidity-
         Alkalinity

    12 & 13

    D202

    . . .

    Analysis of Ash for Cations by
         Atomic Absorption Spectrophotometry

    7078

    D1193 & D2576

    . . .

    Ash Content

    7982

    D202

    T 413

    Dirt in Pulp

    40 & 41

    . . .

    T 213

    Fiber Analysis

    23 & 24

    D202 & D1030

    . . .

    Fiber Length of Pulp

    42 & 43

    . . .

    T 232, T 233

    Freeness (Canadian Standard
         Freeness)

    53 & 54

    . . .

    T 227

    Kappa Number/Permanganate
         Number (Substances Oxidizable
         by Permanganate)

    27 & 28

    . . .

    T 236, UM 251

    Laboratory Processing of Pulp
         (Beater Method)

    51 & 52

    . . .

    T 200

    Moisture in Pulp

    3133

    . . .

    T 210

    Neutral Aqueous Extractable  Hard-
         ness in Pulp

    1622

    D202, D1126, & D2576

    . . .

    Pentosan Content of Pulp

    29 & 30

    . . .

    T 223

    Resistance of Pulp to Disintegration
         (Standard RPG)

    4450

    . . .

    T 239, UM 252

    Shive Count

    3439

    . . .

    . . .

    Solvent-Soluble Matter in Pulp

    25 & 26

    D202

    . . .

    Tensile Properties

    6569

    D202

    . . .

    Water-Extractable Chlorides

    14 & 15

    D202

    . . .

    1.3.2 Handsheet characteristics determinable by these procedures appear in the following sections:

    Procedure

    Sections

    ASTM
    Method
    Reference

    TAPPI
    Method
    Reference

    Air Resistance (Porosity)

    57 & 58

    D202

    T 205

    Apparent Density

    63 & 64

    D202

    T 205

    Bursting Strength

    59 & 60

    D202 & D774/D774M

    T 205

    Folding Endurance (M.I.T.)

    51 & 52

    D202 & D2176

    T 205

    Forming Handsheets for Physical
         Tests of Pulp

    55 & 56

    . . .

    T 205

    Tensile Strength

    65 & 66

    D202 & D828

    T 205

    Note 2: Methods for Ash, Silica, selected cations from Ash, Heat Stability, α, β, and γ Cellulose, Viscosity, Total Chlorine, Tear, and Dissipation Factor and Relative Permittivity, will be considered for addition as methods are developed.

    1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    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.

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation

    D774/D774M Test Method for Bursting Strength of Paper

    D828 Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus

    D1030 Test Method for Fiber Analysis of Paper and Paperboard

    D1126 Test Method for Hardness in Water

    D1193 Specification for Reagent Water

    D1711 Terminology Relating to Electrical Insulation

    D2176 Test Method for Folding Endurance of Paper and Plastics Film by the M.I.T. Tester

    D2576 Method of Test for Metals in Water and Waste Water by Atomic Absorption Spectrophotometry

    D3376

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications


    ICS Code

    ICS Number Code 85.040 (Pulps)

    UNSPSC Code

    UNSPSC Code 14101501(Paper pulp)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D3376-18

    Citation Format

    ASTM D3376-18, Standard Test Methods of Sampling and Testing Pulps to be Used in the Manufacture of Electrical Insulation, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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