Document 7OQaj13NazObn8mNZ7yqeGN9o
Manufacturing Specifications - Asbestos Mill Date Approved: January 4, 1945
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1/16" NORFOLK AND WESTERN ROLLBOARP Preduct Nc. 13737: Group - Asbestos
Typical U30 - For Norfolk and Western R.R. Co.
Typo r l/l6" Rollbcard shall be a lamina ted. asbestos preduct consisting of two layers cf asbestos paper firmly- bended with a
silicate of soda adhesive.
Furnish Composition - Standard beater furnishes with one or more alternate furnishes for this product are specified in the Appendix for this group. Alternate furnishes are provided to permit flex ibility in the control of asbestos fibor or asbestos paper scrap inventories. Furnishes are specified with varying amounts of different grados cf fibers tc- allow the Management a choice whenever a surplus cr a shortage cf any particular grade cf fiber cr asbestos paper 'serap has- developed at either the Asbestos Mill cr the Asbestos Mine.
Specification Requirements
Weight, lb. per 100 sq. ft. (bene dry)
Caliper, inches
Tensile strength, lb. with fgrain (1)
Tensile strength, lb. across grain (1)
Asbestos, percent
.
Flame test (2)
_'
Heat test (3)
*-
Bend test (4)
Tin.
m
0.052 8 6. 97 Ok Ok - Ok
Desired Average
33.0 -
13 10
-
Max.
35.0 0.065 -- -
(1) Tensile strength tc be tasted on strip 1" x 10".
(2) Flame -Tostr No- odor:*shhll* dove lop in Bunsen flame.
(3) Heat Test: Board heated to cherry red must retain fair .
strongth and not become brittle cr crumble.
^
(4) Bend Test: Less than lOf. cf outer fibers shall rupture
v?hen dried 1" x 10M strip is bent flat on itself in .
shape cf S.
Aver?.ge Consumption cf Materials, lb. per 100 so, ft.
Asbestos paper (2 plies) 4?c Be* sodium silicate (dry)*
31.0
2.0
33.0
* Average wet siliento consumption 5.0 lb. per 100 sq. ft
Manufacturing Specifications - Asbestos'Mill-
(Continued)
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Quality - The paper shall be produced by "felting" at least 97 ~
percent by weight cf asbestos fiber. The surface of the sheet
shall be unifcrnly smooth and, upon splitting or tearing cn the
bias, shall appear reasonably free from lumps or particles cf
foreign substances.
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Dimensions
'.
Y/idth cf roll: 36" plus or minus 1/8" Size cf roll: approxiratcly 100 lb.
Packaging and Marking - Rolls shrill bo tightly and evenly v/cund-tc specified size and wrapped in 4-0 lb. kraft pnper. Corrugated card board disks shall bo used as headers, which arc held in place with the overlapping {3inaed tapo placed arrund the roll ends. Each roll shall have the weight stencilled cn the wrapper.
S..
Approved:
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