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ASTM D2252-18
Standard Specification for Fineness of Types of Alpaca
NORMA vydaná dňa 1.7.2018
Informácie o norme:
Označenie normy: ASTM D2252-18
Dátum vydania normy: 1.7.2018
Kód tovaru: NS-856835
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D2252-18 :
This specification is applicable in the classification of alpaca into types according to fineness. Five types of alpaca have been classified according to its average diameter limit, namely Type T Extra, Type T, Type X, Type AA, Type A, Type SK, and Type LP.
Keywords:
alpaca, animal fibers (except wool), fineness,, ICS Number Code 59.060.10 (Natural fibres)
Doplňujúce informácie
| Significance and Use | ||||||
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4.1 This specification for fineness is intended as a guide for production, preparation, and marketing (Note 1) by comparing the average fiber diameter of a measured specimen with the fineness specifications for the various types listed in Table 1. The standard deviation which expresses measured variability of a specimen may be compared with the average shown in Table X2.1. Note 1: Test Method D2130 does not include any values for the
precision to be expected in the testing of alpaca fibers. In an
interlaboratory test in which six laboratories each made one test
on each of six type samples, HTB-CB, HAXB-CB, HAAB-CB, HAB-CB,
HLPB-CL, and HSKB-CL, the coefficient of variation of the average
fiber diameters between laboratories, including test variation, was
3.2, 4.7, 3.8, 4.5, 2.2, and 0.93 % for the respective alpaca
types.
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| 1. Scope | ||||||
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1.1 This specification is applicable in the classification of alpaca into types according to fineness. 1.2 The values stated in inch-pound 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. 1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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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