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ASTM D3376-18
Standard Test Methods of Sampling and Testing Pulps to be Used in the Manufacture of Electrical Insulation
NORMA vydaná dňa 1.11.2018
Informácie o norme:
Označenie normy: ASTM D3376-18
Dátum vydania normy: 1.11.2018
Kód tovaru: NS-904614
Počet strán: 10
Približná hmotnosť: 30 g (0.07 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D3376-18 :
Keywords:
air resistance ash analysis, ash content, apparent density, bulk characteristics, bursting strength, cellulose, cellulosic fiber, conductivity, dirt, disintegration, extractable acidity-alkalinity, extractable chlorides, fiber analysis, fiber length of pulp, folding endurance, freeness (Canadian Standard Freeness), handsheet characteristics, handsheet machine, Kappa/Permanganate number, moisture, pentosan content, pH, pulps, shive count, solvent soluble matter, tensile strength, water ,
Doplňujúce informácie
| Significance and Use | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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 |
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| 1. Scope | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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:
1.3.2 Handsheet characteristics determinable by these procedures appear in the following sections:
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. |
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| 2. Referenced Documents | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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