ASTM F336-97

Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service

SCOPE
1.1 This practice covers the designs, sizes, classifications, and construction of enveloped gaskets for severe corrosive applications. The envelope serves as the corrosion resistant member of the composite gasket and is a nonmetallic material such as polytetrafluoroethylene or related materials. The inserts are nonmetallic gasketing materials with or without metal reinforcement. Other types of composite gaskets are covered in Classification F868.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety problems, 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

• Status: Historical
• Publication Date: 09-Nov-1997
• ICS: 21.140 - Seals, glands
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.10 - Composite Gaskets

Relations

• Replaced By: ASTM F336-02 - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
• Effective Date: 10-Oct-2002
• Referred By: ASTM F112-00(2019) - Standard Test Method for Sealability of Enveloped Gaskets
• Effective Date: 10-Nov-1997
• Referred By: ASTM F2325-14(2020) - Standard Classification for Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for Transportation Applications
• Effective Date: 10-Nov-1997
• Referred By: ASTM F868-17 - Standard Classification for Laminated Composite Gasket Materials
• Effective Date: 10-Nov-1997

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 336 – 97
Standard Practice for
Design and Construction of Nonmetallic Enveloped Gaskets
for Corrosive Service
This standard is issued under the fixed designation F 336; 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 3. Significance and Use
1.1 This practice covers the designs, sizes, classifications, 3.1 The gaskets covered by this practice can be used on, but
and construction of enveloped gaskets for severe corrosive are not limited to, equipment constructed of the following
applications. The envelope serves as the corrosion resistant materials: (a) stoneware, (b) glass and glass-lined, (c) tantalum
member of the composite gasket and is a nonmetallic material (solid and lined), (d) titanium (solid and lined or clad), ( e)
such as polytetrafluoroethylene or related materials. The inserts zirconium (solid and lined or clad), (f) silver (solid and lined),
are nonmetallic gasketing materials with or without metal and (g) nickel and nickel alloys (solid and clad).
reinforcement. Other types of composite gaskets are covered in 3.2 The gaskets provided for herein are for the following:
Classification F 868. (a) pipe flanges (flat or raised face), ( b) vessel nozzles, (c)
1.2 This standard is based directly upon ANSI circular openings in vessels in excess of 12 in. (305 mm)
B16.21–1992; for that reason units are as ANSI stated in diameter, and (d) oval openings in vessels.
inches.
4. Sizes
1.3 This standard does not purport to address all of the
4.1 The gasket nominal size listed in inches, Table 1, will be
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- the same as used on the following pipe flanges in accordance
with ASME B16.21 – 1992:
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
Pipe Size ASME
⁄2 to 24 in. B16.21 – 1992, Table 5 and 6
Over 24 in. B16.21 – 1992, Table 1 and 2
2. Referenced Documents
2.1 ASTM Standards: 4.2 Commercial dimensional tolerances apply, unless other-
wise agreed upon between the seller and the purchaser.
D 3294 Specification for PTFE Resin Molded Basic
Shapes
5. Materials and Manufacture
D 3308 Specification for PTFE Resin Skived Tape
5.1 The gaskets covered by this practice shall be made of
F 104 Classification System for Nonmetallic Gasket Mate-
nonmetallic materials, except when a metal support is desired
rials
in the insert.
F 112 Test Method for Sealability of Enveloped Gaskets
5.2 Materials should be selected, both for inserts and
F 868 Classification for Laminated Composite Gasket Ma-
envelopes, that will withstand the conditions under which they
terials
are to be subjected in service.
2.2 Other Document:
5.3 A list of reference literature for determining material
ASME B16.21 – 1992 Nonmetallic Flat Gaskets for Pipe
suitability in corrosive environments is available from ASTM
Flanges
Headquarters. It is entitled, “Materials of Construction ASTM
F-3.50.10 Corrosion Data Literature.” (Request RR:F–3-
1001.)
5.4 The design of the envelope classifies the enveloped
This practice is under the jurisdiction of ASTM Committee F-3 on Gaskets and
gasket as follows:
is the direct responsibility of Subcommittee F 03.10on Composite Gaskets.
5.4.1 Split, knife cut (Fig. 1 and Fig. 2).
Current edition approved Nov. 10, 1997. Published April 1998. Originally
published as F 336 – 71. Last previous edition F 336 – 92.
5.4.2 Machined (Fig. 3 and Fig. 4).
Annual Book of ASTM Standards, Vol 08.02.
Annual Book of ASTM Standards, Vol 09.02.
4 5
Available from American Society of Mechanical Engineers, 345 E 47th St. New Supporting data are available from ASTM Headquarters. Request RR: F–3-
York, NY 10017. 1001.
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
F 336
A
TABLE 1 Nominal Gasket Sizes
NOTE 1—Refer to Fig. 1 through Fig. 6 for explanation of gasket
component details.
NOTE 2—Split design inserts not to be smaller than nominal pipe size.
NOTE 3—Inside diameter of folded and machined design envelopes will
adjoin the insert inside diameter assuring noninterference with flow
through pipe.
NOTE 4—Full face gaskets shall have envelope outside diameter same
as ring gasket outside diameter.
NOTE 5—Sizes 14 in. (356 mm) and larger may be made from
machined envelopes depending upon material shape availability.
Insert (2) (See Note 1) Envelope (1) (See Note 1)
IV. Flat
III. Full
Ring
Nominal II. Inside Face V. (Each VI. Inside
Gasket VII. Outside
Pipe Diameter Outside Side) Diameter
Outside Diameter (C)
Size, in. (B) Diameter Thickness (A)
Diameter
(D)
(C)
in. in. in. in. in. in.
⁄2 0.84 3.50 1.88 0.015 0.50 1.88
⁄4 1.06 3.88 2.25 0.015 0.75 2.25
1 1.31 4.25 2.62 0.020 1.00 2.62
1 ⁄4 1.66 4.63 3.00 0.020 1.25 3.00
1 ⁄2 1.91 5.00 3.38 0.020 1.50 3.38
2 2.38 6.00 4.12 0.020 2.00 4.12
2 ⁄2 2
...