ASTM C419-94(2000)
(Practice)Standard Practice for Making and Curing Test Specimens of Mastic Thermal Insulation Coatings
Standard Practice for Making and Curing Test Specimens of Mastic Thermal Insulation Coatings
SIGNIFICANCE AND USE
The method of preparation of test specimens of mastic thermal insulation coatings can have an impact upon values obtained during testing. Testing laboratories should follow this practice to help ensure the reproducibility of test methods for which a cured sheet or film of a mastic thermal insulation coating is required.
SCOPE
1.1 This practice covers the preparation of specimens of mastics and coatings in the form of cured sheets or films that may be used in other procedures for evaluation of physical properties.
1.2 Three procedures are described for casting and curing (Note 1) mastics and coatings of all types for thermal insulation.
Note 1--The term "cure" is used primarily to denote the condition that develops as the result of loss of volatile matter but also to denote possible subsequent changes in chemical or physical properties due to crosslinking.
1.2.1 Procedure A is intended to provide a specimen of controlled thickness applied to insulation, and equivalent in other respects to that obtainable under field application conditions. The thermal insulation intended for field use may be specified as the backing.
1.2.2 Procedure B is intended to provide a free-film specimen of controlled thickness having smooth surfaces on both sides. This type is required for some types of physical testing.
1.2.3 Procedure C is intended to provide a free-film specimen of controlled thickness having one smooth surface (as field applied).
1.3 The procedures of this practice are not intended for the evaluation of application properties. These are covered in Test Methods C461 and Guide C647.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C419–94(Reapproved 2000)
Standard Practice for
Making and Curing Test Specimens of Mastic Thermal
1
Insulation Coatings
This standard is issued under the fixed designation C 419; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope C 461 Test Methods for Mastics and Coatings Used With
2
Thermal Insulation
1.1 This practice covers the preparation of specimens of
C 533 Specification for Calcium Silicate Block and Pipe
mastics and coatings in the form of cured sheets or films that
2
Thermal Insulation
may be used in other procedures for evaluation of physical
C 647 Guide to Properties andTests of Mastics and Coating
properties.
2
Finishes for Thermal Insulation
1.2 Three procedures are described for casting and curing
D 6 Test Method for Loss on Heating of Oil and Asphaltic
(Note 1) mastics and coatings of all types for thermal insula-
3
Compounds
tion.
NOTE 1—The term “cure” is used primarily to denote the condition that 3. Summary of Practice
develops as the result of loss of volatile matter but also to denote possible
3.1 Mastics and coatings are applied by a metal blade to
subsequentchangesinchemicalorphysicalpropertiesduetocrosslinking.
thermal insulation backing material in a thickness regulated by
1.2.1 Procedure A is intended to provide a specimen of
guide bars. Moderate heat is applied to the specimens to dry or
controlled thickness applied to insulation, and equivalent in
otherwise cure them.
other respects to that obtainable under field application condi-
4. Significance and Use
tions. The thermal insulation intended for field use may be
specified as the backing.
4.1 The method of preparation of test specimens of mastic
1.2.2 Procedure B is intended to provide a free-film
thermal insulation coatings can have an impact upon values
specimen of controlled thickness having smooth surfaces on
obtained during testing. Testing laboratories should follow this
both sides. This type is required for some types of physical
practice to help ensure the reproducibility of test methods for
testing.
which a cured sheet or film of a mastic thermal insulation
1.2.3 Procedure C is intended to provide a free-film
coating is required.
specimen of controlled thickness having one smooth surface
5. Apparatus
(as field applied).
1.3 The procedures of this practice are not intended for the
5.1 Guide Bars—Two rectangular steel bars of thickness
evaluation of application properties. These are covered in Test
equal to the desired wet thickness of the applied mastic or
Methods C 461 and Guide C 647.
coating. The guide bars shall be equal in length to the total
1.4 The values stated in inch-pound units are to be regarded
length of the specimens. For use on relatively soft backing
as the standard. The values given in parentheses are for
material, the guide bars may be equipped with pins projecting
information only.
from the lower surface at each end, which can be forced into
1.5 This standard does not purport to address all of the
the backing to hold the bars in position during preparation of
safety concerns, if any, associated with its use. It is the
the test specimen.
responsibility of the user of this standard to establish appro-
5.2 Strike-Off Bar—Aflat strip of rigid metal, not less than
priate safety and health practices and determine the applica-
2 in. (51 mm) greater in length than the width of the specimen.
bility of regulatory limitations prior to use.
One edge shall be smooth and straight.
1
5.3 Leveling Roller— One section of straight 1 ⁄2-in. (38-
2. Referenced Documents
mm) stainless steel pipe or any other convenient cylindrical
2.1 ASTM Standards:
leveling tool. The tool shall have a smooth surface. Minimum
length shall be 2 in. (51 mm) longer than the width of the
specimen.
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
Insulation and is the direct responsibility of Subcommittee C16.33 on Insulation
Finishes and Moisture.
2
Current edition approved Dec. 15, 1994. Published February 1995. Originally Annual Book of ASTM Standards, Vol 04.06.
3
published as C 419 – 58 T. Last previous edition C 419 – 81 (1990). Annual Book of ASTM Standards, Vol 04.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C419
5.4 Backing Material— Unless otherwise specified by the edges. Fill the area between the guide bars with mastic and
procedure for the test to be made, the backing for the specimen smooth out with a trowel to a level about 0.063 in. (1.6 mm)
shall cons
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.