1、Designation: F336 02 (Reapproved 2016)Standard Practice forDesign and Construction of Nonmetallic Enveloped Gasketsfor Corrosive Service1This standard is issued under the fixed designation F336; the number immediately following the designation indicates the year of originaladoption or, in the case o
2、f revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the designs, sizes, classifications,and construction of enveloped gaskets
3、 for severe corrosiveapplications. The envelope serves as the corrosion resistantmember of the composite gasket and is a nonmetallic materialsuch as polytetrafluoroethylene, PTFE, or related materials.The inserts are nonmetallic gasketing materials with or withoutmetal reinforcement. Other types of
4、composite gaskets arecovered in Classification F868.1.2 This standard is based directly upon ANSIB16.212011; for that reason units are as ANSI stated ininches.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user
5、 of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D3294 Specification for Polytetrafluoroethylene (PTFE)Resin Molded Sheet and Molded Basic ShapesD3308 Specificati
6、on for PTFE Resin Skived TapeF104 Classification System for Nonmetallic Gasket Materi-alsF112 Test Method for Sealability of Enveloped GasketsF868 Classification for Laminated Composite Gasket Mate-rials2.2 Other Document:ASME B16.21 2011 Nonmetallic Flat Gaskets for PipeFlanges33. Significance and
7、Use3.1 The gaskets covered by this practice can be used on, butare not limited to, equipment constructed of the followingmaterials: (a) stoneware, (b) glass and glass-lined, (c) tantalum(solid and lined), (d) titanium (solid and lined or clad), (e)zirconium (solid and lined or clad), (f) silver (sol
8、id and lined),and (g) nickel and nickel alloys (solid and clad).3.2 The gaskets provided for herein are for the following:(a) pipe flanges (flat or raised face), (b) vessel nozzles, (c)circular openings in vessels in excess of 12 in. (305 mm)diameter, and (d) oval openings in vessels.4. Sizes4.1 The
9、 gasket nominal size listed in inches, Table 1, will bethe same as used on the following pipe flanges in accordancewith ASME B16.21 2011:Pipe Size ASME12 to 24 in. B16.21 1992, Table 5 and 6Over 24 in. B16.21 1992, Table 1 and 24.2 Commercial dimensional tolerances apply, unless other-wise agreed up
10、on between the seller and the purchaser.5. Materials and Manufacture5.1 The gaskets covered by this practice shall be made ofnonmetallic materials, except when a metal support is desiredin the insert.5.2 Materials should be selected, both for inserts andenvelopes, that will withstand the conditions
11、under which theyare to be subjected in service.5.3 A list of reference literature for determining materialsuitability in corrosive environments is available from ASTMHeadquarters. It is entitled, “Materials of Construction ASTMF-3.50.10 Corrosion Data Literature.”45.4 The design of the envelope clas
12、sifies the envelopedgasket as follows:5.4.1 Split, knife cut (Fig. 1 and Fig. 2).5.4.2 Machined (Fig. 3 and Fig. 4).1This practice is under the jurisdiction of ASTM Committee F03 on Gaskets andis the direct responsibility of Subcommittee F03.10 on Composite Gaskets.Current edition approved April 1,
13、2016. Published April 2016. Originallyapproved in 1971. Last previous edition approved in 2009 as F336 02 (2009).DOI: 10.1520/F0336-02R16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume
14、information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers, Three ParkAvenue, New York, NY 10016.4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:F03-1001
15、.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.4.3 Tape Folded, made endless by joining tape ends witha heat sealing procedure (Fig. 5 and Fig. 6).6. Insert Classification56.1 ConstructionsTwo insert constructions are covered asfo
16、llows:6.1.1 Construction 1Single layer.6.1.2 Construction 2Multiple layer.6.2 GradesMultiple layer constructions include the fol-lowing:6.2.1 Grade 1Two layers, any combination of nonmetallichomogenous materials.6.2.2 Grade 2Three layers, any combination of nonme-tallic homogenous materials.6.2.3 Gr
17、ade 3, Three layers, the two outer layers nonmetal-lic homogenous materials, the inner layer (core) metallic.5See Fig. 1 through Fig. 6.TABLE 1 Nominal Gasket SizesANOTE 1Refer to Fig. 1 through Fig. 6 for explanation of gasketcomponent details.NOTE 2Split design inserts not to be smaller than nomin
18、al pipe size.NOTE 3Inside diameter of folded and machined design envelopes willadjoin the insert inside diameter assuring noninterference with flowthrough pipe.NOTE 4Full face gaskets shall have envelope outside diameter sameas ring gasket outside diameter.NOTE 5Sizes 14 in. (356 mm) and larger may
19、be made from machinedenvelopes depending upon material shape availability.Insert (2) (See Note 1) Envelope (1) (See Note 1)NominalPipeSize, in.II. InsideDiameter(B)III. FullFaceOutsideDiameter(D)IV. FlatRingGasketOutsideDiameter(C)V. (EachSide)ThicknessVI. InsideDiameter(A)VII. OutsideDiameter (C)in
20、. in. in. in. in. in.12 0.84 3.50 1.88 0.015 0.50 1.8834 1.06 3.88 2.25 0.015 0.75 2.251 1.31 4.25 2.62 0.020 1.00 2.62114 1.66 4.63 3.00 0.020 1.25 3.00112 1.91 5.00 3.38 0.020 1.50 3.382 2.38 6.00 4.12 0.020 2.00 4.12212 2.88 7.00 4.88 0.020 2.50 4.883 3.50 7.50 5.38 0.020 3.00 5.38312 4.00 8.50 6
21、.38 0.020 3.50 6.384 4.50 9.00 6.88 0.020 4.00 6.885 5.56 10.00 7.75 0.020 5.00 7.756 6.62 11.00 8.75 0.020 6.00 8.758 8.62 13.50 11.00 0.020 8.00 11.0010 10.75 16.00 13.38 0.020 10.00 13.3812 12.75 19.00 16.13 0.020 12.00 16.1214 14.00 21.00 17.75 0.015 notapplicable17.0016 16.00 23.50 20.25 0.015
22、see Note 5 19.0018 18.00 25.00 21.62 0.015 21.0020 20.00 27.50 23.88 0.015 23.0024 24.00 32.00 28.25 0.015 27.0030 30.00 38.75 34.75 0.015 33.0036 36.00 46.00 41.25 0.015 39.0042 42.00 53.00 48.00 0.015 45.0048 48.00 59.50 54.50 0.015 51.0054 54.00 66.25 61.75 0.015 57.0060 60.00 73.00 68.12 0.015 6
23、3.0072 72.00 86.50 81.38 0.015 75.0084 84.00 99.75 94.25 0.015 87.0096 96.00 113.25 107.25 0.015 99.00AExtracted from American National Standard Neometallic Gaskets for Pipe Sizes(ANSI B16.212011), with the permission of the publisher. The American Societyof Mechanical Engineers, United Engineering
24、Center, Three Park Avenue, NewYork, NY 10016.FIG. 1 Split Design (Flat Ring)FIG. 2 Split Design (Full Face)F336 02 (2016)26.3 TypeThis classification covers insert material types asfollows:6.3.1 NonmetallicAny recognized nonmetallic gasket ma-terial in accordance with Classification F104, taking int
25、oconsideration limitations with regard to temperature and pres-sure.6.3.2 MetallicInner layer (core) metallic material in Con-struction 2, Grade 3.6.3.2.1 Flat solid metal center.6.3.2.2 Corrugated metal center.6.3.2.3 Perforated metal center.6.3.2.4 Braided metal center.6.3.2.5 As specified.6.4 Con
26、struction 2, multiple layer inserts may be pre-assembled by gluing, taping, or any other suitable methodbefore inserting in the envelope.6.5 Elastomeric materials with high flow or creep propertieshave a tendency to stretch and split the envelope and are notrecommended unless special provisions are
27、made in the design.FIG. 3 Machined Design (Flat Ring)FIG. 4 Machined Design (Full Face)FIG. 5 Folded Design (Flat Ring)FIG. 6 Folded Design (Full Face)F336 02 (2016)36.6 Insert materials are not required to be corrosion-resistantin most cases since they are separated from the corrosives bythe corros
28、ion-resistant envelope.6.7 Extremely hard materials (such as solid metal or phe-nolic laminates) are not recommended for single layer con-struction inserts or the outer inserts in multiple layer construc-tions since excessive bolt torquing would be required to effecta satisfactory seal.6.8 For deter
29、mining the suitability of inserts to sealsatisfactorily, Test Method F112 is recommended.7. Inspection7.1 Inspect electrically the corrosion-resistant materialsused as shields for enveloped gaskets after all machining andforming has been completed, using the methods described inSpecifications D3308
30、for tape and D3294 for machinedarticles, Type 1, Grade 1.7.2 Commercial dimensional tolerances apply unless other-wise agreed upon between the seller and the purchaser.8. Keywords8.1 corrosive service; enveloped; gaskets; nonmetallic;polytetrafluoroethylene (PTFE)ASTM International takes no position
31、 respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.T
32、his standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM In
33、ternational Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address show
34、n below.This standard is copyrighted by ASTM International, 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 aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 02 (2016)4
