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  • ASTM
    D440-07(2012) Standard Test Method of Drop Shatter Test for Coal
    Edition: 2012
    $82.37
    Unlimited Users per year

Description of ASTM-D440 2012

ASTM D440 - 07(2012)

Standard Test Method of Drop Shatter Test for Coal

Active Standard ASTM D440 | Developed by Subcommittee: D05.07

Book of Standards Volume: 05.06




ASTM D440

Significance and Use

3.1 The values determined in this test method, when evaluated in terms of pertinent experience with other coals, may be used as indications of the extent to which coal will break in conventional transit and handling beyond the point of sampling.

1. Scope

1.1 This test method of drop shatter test 2 covers the determination of the relative size stability and its complement, the friability, of sized coal. It affords a means of indicating the ability of coal to withstand breakage when subjected to handling at the mine and during transit to the consumer. The test method is serviceable for ascertaining the similarity of coals in respect to size stability and friability rather than for determining values within narrow limits in order to emphasize their dissimilarity. This test method is considered applicable for testing a selected single size of different coals, for testing different single sizes of the same coal, and for mixed sizes of the same or different coals.

Note 1 By single sizes is meant those with fixed upper and lower sieve opening limits, selected from those designated in 4.2 ; and by mixed sizes is meant either slack or a mixture of two or more single sizes.

1.2 This test method appears best suited for measuring the relative resistance to breakage of the larger sizes of coal when handled in thin layers such as from loader to mine car, from loading boom to railroad car, from shovel to chute, etc. While it may not be so well adapted for measuring the liability to breakage of coal when handled in mass, as in unloading open-bottom cars, emptying bins, etc., it is believed that the test method will serve also to indicate the relative size stability of composite sizes of coal where, in commercial handling, the smaller sized pieces have a cushioning effect which tends to lessen the breakage of the larger pieces of coal.

1.3 The values stated in inch-pound units shall be regarded as the standard. Mass may be expressed in metric values.

1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.


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

D3038 Test Method for Drop Shatter Test for Coke

D4749 Test Method for Performing the Sieve Analysis of Coal and Designating Coal Size

E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves

E323 Specification for Perforated-Plate Sieves for Testing Purposes


Keywords

breakage; coal; coal handling; drop shatter; friability; size stability ;


ICS Code

ICS Number Code 73.040 (Coals)


DOI: 10.1520/D0440-07R12

ASTM International is a member of CrossRef.

ASTM D440

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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