D1330.17885-1 - Vol. 09.02

Designation: D 1330 85 (Reapproved 2000)
Standard Specification for
Rubber Sheet Gaskets1
This standard is issued under the fixed designation D 1330; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This specification covers gaskets cut from sheet rubber
that are intended for general gasket applications on water, air,
and low-pressure steam. They are not intended for use with oils
and strong acids.
1.2 The values stated in SI units are to be regarded as the
standard.
5. Physical Properties
5.1 This material shall conform to the requirements as to
physical properties prescribed in Table 1.
2. Referenced Documents
2.1 ASTM Standards:
D 395 Test Methods for Rubber PropertyCompression
Set2
D 412 Test Methods for Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic ElastomersTension2
D 573 Test Method for RubberDeterioration in an Air
Oven2
D 865 Test Method for RubberDeterioration by Heating
in Air (Test Tube Enclosure)2
D 1415 Test Method for Rubber PropertyInternational
Hardness2
D 2240 Test Method for Rubber PropertyDurometer
Hardness2
D 3182 Practice for RubberMaterials, Equipment, and
Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets2
D 3183 Practice for RubberPreparation of Pieces for Test
Purposes From Products2
7. Workmanship, Finish, and Appearance

7.1 All materials and workmanship shall be in accordance
with good commercial practice, and the resulting stock shall be
free from porous areas, air pockets, foreign matter, or other
defects affecting serviceability.
3. Materials and Manufacture

3.1 Compounds furnished under this specification shall be
manufactured from natural rubber, reclaimed rubber, synthetic
rubber, or mixtures thereof, together with added compounding
materials. The compound shall be suitably vulcanized. The
material shall be of a uniform quality and thickness, and shall
have a smooth or fine fabric surface.
4. Color
4.1 The material shall be red or black as specified.
1
This specification is under the jurisdiction of the ASTM Committee D11 on
Rubber and is the direct responsibility of Subcommittee D11.36 on Seals.
Current edition approved April 26, 1985. Published June 1985. Originally
published as D 1330 54. Last previous edition D 1330 78 (1983).
2
Annual Book of ASTM Standards, Vol 09.01.
6. Dimensional Tolerances
6.1 The material shall conform to the requirements as to
dimensional tolerances prescribed in Table 2.
8. Sampling
8.1 When proof of conformance with this specification is
required, the samples shall be taken from the finished product
whenever possible. When the thickness of the finished product
is less than 1.6 mm (116 in.), the manufacturer shall, upon
request of the purchaser, at the time of ordering, furnish a
sufficient number of test slabs or blocks prepared in accordance
with Practice D 3182 for the proper performance of the
required tests. The slabs or blocks shall be prepared from a
batch of compound similar to that used in the lot. In the case of
gaskets cut from sheet, the manufacturer shall furnish a
305-mm (12-in.) square sample of the uncut sheet. Unless
otherwise specified, a lot shall consist of all products of the
same thickness, submitted for inspection at the same time. All
samples shall be prepared in accordance with Practices D 3182
and D 3183.
9. Test Methods
9.1 The properties enumerated in this specification shall be
determined in accordance with the following methods, except
as modified in accordance with certain of the references given
below:
9.1.1 HardnessTest Methods D 1415 (preferred) or
D2240, except that superimposed buffed specimens, taken
from sheet 1.6 mm (116 in.) thick and over, may be used.
9.1.2 Tensile StrengthTest Methods D 412. Percentage
change in tensile strength shall be determined after air-aging
for 946 2 h at 70 6 2C (158 6 3.6F).
9.1.3 Compression SetTest Method B of Test Methods
Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
1
Copyright by ASTM Int'l (all rights reserved);
Reproduction authorized per License Agreement with UMESH H DHRUV (PRABHAT INDUSTRIES); Thu Sep 2 06:05:43 EDT 2004
D 1330
TABLE 1 Physical Requirements
Grade I
Hardness number
Tensile strength, min, MPa (psi)
Elongation, min, %
Change in tensile strength:
Air aged 94 6 2 h at 706 2C (158 6 3.6F), max, %
Change in elongation:
Compression set, max,% :
22 6 0.25 h at 70 6 2C (158 6 3.6F)
22 6 0.25 h at 125 6 2C (257 6 3.6F)
TABLE 2 Dimensional Tolerances

Nominal Thickness
Tolerance,6
mm
in.
mm
in.
Under 0.80
0.801.60
1.603.20
3.204.80
4.809.50
9.5014.30
1 32
132116
11618
18316
31638
38916
0.25
0.30
0.40
0.50
0.80
1.20
0.010
0.012
0.016
0.020
0.031
0.047
D 395. The sample under test shall be held for 22 6 0.25 h at

70 6 2C (158 6 3.6F). Buffed specimens, taken from sheet
1.5 mm (0.06 in.) thick and over, may be plied to obtain the
required thickness.
9.1.4 Air-AgingTest Method D 865 (preferred) or Test
Method D 573.
10. Inspection and Rejection
10.1 All tests and inspection shall be made at the place of
manufacture prior to shipment, unless otherwise specified. The
manufacturer shall afford the inspector all reasonable facilities,
without charge, for tests and inspection.
10.2 The purchaser may make the tests and inspection to
govern acceptance or rejection of the material at his laboratory,
or elsewhere. Such tests and inspection shall be made at the
expense of the purchaser, and not later than 30 days after
Grade II
Steam
7085
4.9 (700)
150
7085
2.8 (400)
150
7085
4.9 (700)
150
25
...
25
...
...
25
25
...
25
...
...
25
40
...
40
...
...
40
receipt of the material.

10.3 All lots for testing, provided as specified in Section 8,
shall be visually inspected to determine compliance with the
material, workmanship, and color.
10.4 Any material that fails to conform to one or more of the
test requirements may be retested at the expense of the
manufacturer. For this purpose, two additional tests shall be
made for the requirement in which failure occurred. Failure of
either of the retests shall be cause for final rejection.
10.5 Rejected material shall be disposed of as directed by
the manufacturer, and at his expense.
11. Packaging and Package Marking
11.1 PackagingUnless otherwise specified, the material
shall be furnished in rolls between 860 and 1070 mm (35 and
42 in.) wide and approximately 45 kg (100 lb) in mass, and
each roll may contain a maximum of two pieces. It shall be
suitably packaged to give adequate protection in transit.
11.2 MarkingUnless otherwise specified, each roll shall
be marked on one side with the manufacturers identification or
trademark. The purchase order number shall appear on the
wrapping.
12. Keywords
12.1 air; low-pressure steam; rubber; sheet gaskets; water
The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection
with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such
patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and
if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards
and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible
technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your
views known to the ASTM Committee on Standards, at the address shown below.
This standard is copyrighted by ASTM, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at
610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org).
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Reproduction authorized per License Agreement with UMESH H DHRUV (PRABHAT INDUSTRIES); Thu Sep 2 06:05:43 EDT 2004

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Designation: D 1330 85 (Reapproved 2000)

Standard Specification for

Rubber Sheet Gaskets1

7. Workmanship, Finish, and Appearance

3. Materials and Manufacture

TABLE 2 Dimensional Tolerances

D 395. The sample under test shall be held for 22 6 0.25 h at

receipt of the material.

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