Defining Standards and Substandard Anthracite

As used in these regulations in determining standards and/or substandard anthracite the terms undersize and ash content are defined as follows:

1. (a) Undersize - The maximum allowable percentage of undersize coal in the following size of anthracite shall be:

   Round-Hole Screen Sizes (in inches)
   Size	Passing Through	Retained On	Undersize (Percent)(Maximum)
   Egg . . . . . . . . . . . . . . . .	3-1/4	2-7/16	15
   Stove . . . . . . . . . . . . . . .	2-7/16	1-5/8	15
   Chestnut . . . . . . . . . . . . .	1-5/8	13/16	15
   Pea . . . . . . . . . . . . . . . . .	13/16	9/16	15
   No. 1 Buckwheat. . . . . . .	9/16	5/16	15
   No. 2 Buckwheat. . . . . . .	5/16	3/16	17
   No. 3 Buckwheat. . . . . . .	3/16	3/32	20
   No. 4 Buckwheat. . . . . . .	3/32	3/64	20

2. (b) Ash - The maximum allowable dry basis percentage for ash content in anthracite coal shall be:

   Size		Ash (Dry Basis Percent)(Maximum)
   Egg .	. . . . . . . . . . . . . . . . . . . . . . .	10
   Stove	. . . . . . . . . . . . . . . . . . . . . . .	10
   Chestnut	. . . . . . . . . . . . . . . . . . . . . . .	11
   Pea		12
   No. 1 Buckwheat.	. . . . . . . . . . . . . . . . . . . . . . .	13
   No. 2 Buckwheat.	. . . . . . . . . . . . . . . . . . . . . . .	13
   No. 3 Buckwheat.	. . . . . . . . . . . . . . . . . . . . . . .	14
   No. 4 Buckwheat.	. . . . . . . . . . . . . . . . . . . . . . .	15

3. (c) Sizing - The sizing of Anthracite coal shall be determined by passing said anthracite coal over round mesh screens of stated size openings with screens in horizontal position.
4. (d) Ash Contents - Ash contents are determined from the residues left behind when weighed, (1-2 grams), and test samples are completely incinerated in air at 725°C ± 25°C.

(Effective February 18, 1983)