ASTM C299-56

Specification for Laminated Asbestos Thermal Insulation for Pipes (Withdrawn 1971)

General Information

• Status: Withdrawn
• Technical Committee: C16 - Thermal Insulation

Standards Content (Sample)

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Standard Speciji,cations for
1
LAMINATED ASBESTOS THERMAL INSULATION FOR PIPES
•
ASTM Designation: C 299 - 56
ADOPTED, 1956.2
This Standard of the American Society for Testing Materials is issued under
the fixed designation C 299; the final number indicates the year of original
adoption as standard or, in the case of revision, the year of last revision.
NoTE.-An editorial change in Section 9 (b) was made in
March, 1957.
Density, max, lb per cu ft. . . . . . . . . . . 45
Scope
Laminations per inch of thickness. . . . 20 to 45
Thermal conductivity, max, Btu in.
1. These specifications cover preformed
per hr sq ft deg Fahr:
thermal insulation constructed of lam­
At mean temperature of 100 F. . . . . . . 0 .43
inated asbestos felt or asbestos paper, in
At mean temperature of 200 F. . . . . . . 0. SO
At mean temperature of 300 F. . . . . . . 0. 56
pipe-covering form, for use on pipes and
At mean temperature of 400 F. . . . . . . 0. 63
tubing at temperatures up to 700 F.
Standard Sizes and Thicknesses
Composition and Construction
4. (a) Laminated asbestos insulation
2. Each unit or section shall be con­
for pipes shall be furnished in the form
structed of concentric laminations of as­
of a hollow cylinder, usually 36 in. in
bestos felt or asbestos paper, spaced
length, in sizes to fit standard pipe and
apart by suitable means, and bonded
tubing diameters.
with a heat-resisting cement. The insula­
(b) Standard thicknesses shall be 1,
tion shall be formed into hollow cylin­
lt, 2, 2!, and 3 in.; other thicknesses
drical sections split longitudinally down
may be agreed upon between the manu­
one side and partially, or completely, cut
facturer and the purchaser.
through on the oppos1te side, as may be
required for proper application. The ends
Dimensional Tolerances
of each section shall be cut square.
5. The insulation shail conform to the
Physical Requirements
following dimensional tolerances:
3. Laminated asbestos thermal insula­
Toler~nce, plus
or minus, m.
Dimension
tion for pipes shall conform to the follow­
Length. t
ng physical requirements:
Thickness. n
1
Under the standardization procedure of the
Society, these specifications are under the juris­
Finish
diction of the ASTM Committee C-16 on Ther­
mal Insulating l\:Iaterials. 6. Cotton jackets shall be furnished
2
Prior to adoption as standard, these specifi­
on all orders, unless another finish is
cations were published as tentative from 1952 to
specified by the purchaser.
1956.
839
12-34

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840 SPECIFICATIONS FOR LAMINATED ASBESTOS PIPE INSULATION (C 299 - 56)
Packaging and Marking
Accessories
10. (a) The pipe insulation sections
7.
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