1、Designation: F 1476 07An American National StandardStandard Specification forPerformance of Gasketed Mechanical Couplings for Use inPiping Applications1This standard is issued under the fixed designation F 1476; the number immediately following the designation indicates the year oforiginal adoption
2、or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification provides the performance character-istics and qualificati
3、on tests required for gasketed mechanicalcouplings including grooved-type mechanical couplings forgrooved end pipe, mechanical restraint couplings for plain endpipe and mechanical compression couplings for plain end pipe.These couplings are for use at temperatures within the recom-mended temperature
4、 range of their respective gaskets. Consultmanufacturer for details.1.2 The values stated in metric units (SI) are to be regardedas the standard. The values given in parentheses (inch/pound)are provided for information purposes.1.3 Measuring and test equipment (M and additional pipes or fittings wit
5、h the4Available from National Fire Protection Association (NFPA), 1 BatterymarchPark, Quincy, MA 02169-7471, http:/www.nfpa.org.5Available from British Standards Institute (BSI), 389 Chiswick High Rd.,London W4 4AL, U.K., http:/www.bsi-. FIG. 1 Type I Typical ConstructionF 1476 072same sizes, nomina
6、l wall thickness material and materialcondition as the original test specimen.3.1.14 pipehollow tubular products conforming to ANSIB 36.10 and B 36.19, ANSI/AWWA C 151/A21.51 NominalDimensions, or O.D. tube sizes.3.1.15 pressure responsive gasketgasket design such thatapplication of a pressure load
7、to the gasket enhances its sealingcapabilities; that is, additional pressure results in additionalforce between the gasket and the surface to which it is sealing.3.1.16 restrainedcharacteristic of the joint wherein thrustloads generated by internal pressure or external means areabsorbed within the j
8、oint.3.1.17 rigidcharacteristic of a joint where there is essen-tially no available free angular or axial pipe movement.3.1.18 specimena prepared assembly consisting of the testjoint including GMC and pipes or fittings. The specimen isplaced into a controlled environment and tested to determine ifth
9、e joint performs to the standards established by the test.3.1.19 typedifferentiation of kind of pipe or fitting whichgasketed mechanical couplings (GMC) are used to join (that is,grooved or plain end).3.1.20 unrestrainedcharacteristic of a joint wherein thrustgenerated by internal pressure or extern
10、al means is not ab-sorbed by the joint but by other means such as pipe anchors orthrust blocks.4. Classification4.1 Gasketed mechanical couplings (GMC) are classifiedinto the following design types:4.1.1 Type I grooved mechanical couplings.4.1.2 Type II plain end mechanical couplings.4.2 The gaskete
11、d mechanical couplings (GMC) are classi-fied into various grades based on successful completion oftesting defined herein. Grades range from approximately 100psi to 4000 psi and vary by GMC manufacturer. Consult GMCmanufacturer for specific grades available.4.3 The gasketed mechanical couplings (GMC)
12、 are classi-fied by the following joint characteristics:4.3.1 Class 1rigid and restrained.4.3.2 Class 2flexible and restrained.4.3.3 Class 3flexible and unrestrained.5. Ordering Information5.1 Orders for GMC (Gasketed Mechanical Couplings)under this specification shall include the following:5.1.1 AS
13、TM designation, title, number and year of issue,5.1.2 Quantity (number of gasketed mechanical couplings),5.1.3 Size and appropriate suffix (examples: 8 in. NPS, 76.1mm OD),5.1.4 Type (I, II),5.1.5 Grade (consult GMC manufacturer),5.1.6 Class (joint characteristic),5.1.7 Housing material and finish,5
14、.1.8 Gasket material,5.1.9 Bolt (stud) and nut material and finish,5.1.10 Supplementary requirements, if any,5.1.11 Other requirements agreed to between purchaser andGMC manufacturer.5.2 Optional Ordering Requirements:5.2.1 Certification requirements,5.2.2 Special marking requirements.6. Materials a
15、nd Manufacture6.1 Type IGrooved Mechanical Coupling:6.1.1 Grooved Mechanical Coupling Housings:6.1.1.1 Ferrous MaterialsHousings shall be constructedof ductile iron in accordance with SpecificationA 395/A 395MGrade 604018 or 654515, Specification A 536, Grade65-45-12 or malleable iron in accordance
16、with SpecificationA 47/A 47M, Grade 32510 or 35018.6.1.1.2 Grooved mechanical coupling housings shall becoated with the manufacturers standard preparation and paint,or at the purchasers option, hot-dip galvanized in accordancewith Specification A 153/A 153M, or other finish as agreedupon between pur
17、chaser and manufacturer.FIG. 2 Type IIClass 1 Typical ConstructionFIG. 3 Type IIClass 2 Typical ConstructionF 1476 0736.1.1.3 Aluminum Alloy MaterialsHousings shall be con-structed of aluminum alloy in accordance with SpecificationB 26/B 26M, Grade 356-T6 or A 356-T6.6.1.1.4 Finish for aluminum allo
18、y housings shall be bare,anodized in accordance with Specification B 580 or as other-wise agreed between purchaser and manufacturer.6.1.1.5 Iron-chromium-nickel, corrosion resistant material:Housings shall be constructed of iron-chromium-nickel alloy inaccordance with Specification A 743/A 743M, Gra
19、de CF-8 orGrade CF-8M.6.1.1.6 Finish for iron-chromium-nickel shall be bare orotherwise agreed between purchaser and manufacturer.6.1.2 Grooved Mechanical CouplingGaskets shall be ofmaterials suitable for the intended service. Elastomers shallcomply with Classification System D 2000.6.1.3 Grooved Me
20、chanical CouplingBolting:6.1.3.1 Carbon Steel MaterialBolts shall be in accor-dance with Specification A 183, Grade 2, Oval Neck. Nutsshall be in accordance with Specification A 194/A 194M,Grade 2. Finish shall be black or at the purchasers option, zincelectroplated to Specification B 633.6.1.3.2 Co
21、rrosion Resistant MaterialBolts shall be inaccordance with Specification A 193/A 193M, Grade B 8,Class 2 (AISI Type 304) or Specification A 193/A 193M,Grade B 8M, Class 2 (AISI Type 316). Nuts shall be inaccordance with Specification A 194/A 194M Grade 8.6.2 Type IIPlain End Mechanical Coupling:6.2.
22、1 Plain End Mechanical Coupling Housings or CenterSleeves:6.2.1.1 Cast Ferrous MaterialsCast housings or centersleeves shall be constructed of ductile iron in accordance withSpecification A 395/A 395M Grade 604018 or 654515,Specification A 536, Grade 65-45-12 or malleable iron inaccordance with Spec
23、ification A 47/A 47M, Grade 32510 or35018.6.2.1.2 Steel MaterialsEnd rings and sleeves made fromcarbon or stainless steel shall be made from material with aminimum yield strength of 172 MPa (25,000 PSI).6.2.1.3 Plain end mechanical couplings shall be coated withthe manufacturers standard preparation
24、 and paint or otherfinish as agreed upon between the purchaser and manufacturer.Finish for iron chromium-nickel parts shall be bare or other-wise agreed upon between purchaser and manufacturer.6.2.2 Plain End Mechanical CouplingGaskets shall be ofmaterials suitable for the intended service (consult
25、manufac-turer for recommendation). Elastomer shall comply with Clas-sification System D 2000 or BS 2494.6.2.3 Plain End Mechanical CouplingBolting:6.2.3.1 Carbon Steel MaterialBolts shall be in accor-dance with Specification A 183, Grade 2, Oval Neck orSpecification A 325Type 2 Heavy Hex; Cap screws
26、 shall bein accordance with Specification A 574 or BS 6104; Femalethreaded parts, other than nuts, shall be in accordance withSpecification A 183, Grade 2; Nuts, if required, shall conformto SpecificationA 183, Grade 2 or SpecificationA 563GradeC3or DH3, or as otherwise agreed by purchaser and manuf
27、ac-turer. Finish shall be zinc electroplated to Specification B 633or BS 1706.6.2.3.2 Corrosion Resistant MaterialBolts or threadedfemale parts other than nuts shall be in accordance withSpecification A 193/A 193M, Grade B 8, Class 2 (AISI Type304) or Grade B 8M, Class 2 (AISI Type 316); Cap screwss
28、hall be in accordance with F 837 or BS 6105; Nuts, ifFIG. 4 Type IIClass 3 Typical ConstructionF 1476 074required, shall be in accordance with Specification A 194/A 194M, Grade 8 or as agreed upon by purchaser andmanufacturer.6.3 Other MaterialsWhere other materials are required,the material and mec
29、hanical properties of the product shall beas agreed upon by the GMC manufacturer and the purchaser.6.4 Material Quality:6.4.1 The material shall be of such quality and purity thatthe finished product shall have the properties and characteris-tics to meet the performance requirements of this standard
30、.6.4.2 The manufacturer is encouraged to use materialsproduced from recovered materials to the maximum extentpracticable without jeopardizing the intended use. The term“recovered materials” means: “Materials which have beencollected or recovered from solid waste and reprocessed tobecome a source of
31、raw material, as opposed to virgin rawmaterials.” Used or rebuilt products shall not be used.7. Other Requirements7.1 Testing Requirements:7.1.1 GMC shall be subjected to the tests described in theAnnex for the purpose of qualifying the GMC design.7.1.2 These tests shall be repeated when changes are
32、 madein the design, material, or manufacturing process that degradethe performance of the GMC. Degradation determination is tobe made by the manufacturer or at agreement between themanufacturer and purchaser.7.2 Qualification Requirements:7.2.1 GMC shall be qualified using specimens of the sametype,
33、 grade and class. Each type, grade, and class shall betested in order to qualify the design. Qualification of the GMCrequires successful completion of required testing. Each GMCdesign is only qualified for use on the pipe or fitting materialand wall thickness on which it was tested.7.2.2 All GMCs te
34、sted shall be comprised of an equalnumber of specimens from the smallest, most intermediatesize, and largest sizes within the size range of the GMC beingqualified.7.2.3 Through reasonable interpolations between the GMCsizes tested, other sizes of GMCs within the same type, gradeand class will be con
35、sidered qualified if the specimens accord-ing to 7.2.2 pass the testing requirements. Extrapolation shallnot be used for qualification purposes.7.3 Qualification Test Report:7.3.1 Upon completion of testing, a qualification test reportshall be written and maintained on file during the life cycle oft
36、he design. A copy of this report shall be made available forinspection at the manufacturers facility.7.3.2 Any failure during qualification testing shall be ana-lyzed and the failure analysis and corrective action shall beincluded in the qualification test report.7.3.3 Aretest as specified in Sectio
37、n 11 (number of tests andretests) may be allowed when failure to the original jointoccurs during qualification testing. When retesting is permit-ted, the failure analysis and corrective action shall be includedin the qualification test report specified in 7.3.1.7.4 Test Equipment and Inspection Faci
38、lities:7.4.1 Test equipment and inspection facilities shall be ofsufficient accuracy and quality to permit performance ofrequired inspections and tests.7.4.2 Calibration System RequirementsThe testing andinspection facilities shall maintain a calibration system forMeasuring and Test Equipment (Mthat
39、 is, joint.12.2.2 The intermixing of sub-components of the same type,grade, and class, but of different brands or trade name,constitutes non-compliance with this standard.12.2.3 Test specimens used in testing shall be assembledusing a GMC of a single type, grade and class.12.2.4 The wall thickness a
40、nd O.D. size of the pipe or fittingshall be as specified for the GMC joint being qualified.12.3 Identification of Test Specimens:12.3.1 Each test specimen shall be identified with a uniquenumber to provide traceability back to the test records.12.3.2 Identification of test specimens shall be permane
41、nt.In those cases where size or design does not permit permanentmarkings, tagging or bagging may be used.12.3.2.1 When, as a result of testing, a test specimen issectioned into two (2) or more pieces, each piece shall bemarked with the original unique identification number.12.4 Test specimens may be
42、 disposed of following approvalof the qualification test report by the GMC manufacturer.13. Test Methods13.1 Standard Qualification Tests for GMC shall be asspecified in theAnnex.The following tests described herein arerequired for GMC qualification as applicable to the type, gradeand class.Name of
43、Test AnnexPerformance Tests for GMC Annex A1Examination of Specimen Annex A2Pneumatic Proof Test Annex A3Vacuum Test Annex A4Hydrostatic Proof Test Annex A5Flexibility Test Annex A6Hydrostatic Burst Test Annex A7Rigidity Test Annex A8Bending Moment Proof Test Annex A9Bending Moment Ultimate Test Ann
44、ex A1013.2 Certification of Test Results:13.2.1 When specified in the purchase order or the contract,the purchaser shall be furnished certification that samplesrepresenting the GMC have been tested as directed in thisspecification and the requirements have been met. Whenspecified in the purchase ord
45、er or contract, a report of theresults shall be available for inspection at the manufacturersfacility.13.3 In-Process Material TestsIn-Process Material Testsshall be performed in accordance with manufacturers standardin-process test procedures.14. Inspection14.1 Terms of Inspection:14.1.1 Inspection
46、 of GMC shall be in accordance withmanufacturers standard inspection procedure or as agreedupon between the purchaser and the manufacturer or supplieras part of the purchase contract.14.2 Raw Material Inspection:F 1476 07614.2.1 Raw material shall be inspected for compliance withits material specifi
47、cation. A certificate of compliance or millcertificate shall be obtained from the material supplier, asapplicable.14.3 Quality Conformance Inspection:14.3.1 GMC samples shall be visually and dimensionallyexamined to verify compliance with the manufacturers appro-priate drawings.14.4 Process Control
48、Inspection:14.4.1 GMC shall be inspected throughout the entire manu-facturing and processing cycle. Methods of inspection shall bein compliance with manufacturers quality assurance proce-dures.14.5 Inspection Records:14.5.1 Inspection records shall be maintained by the manu-facturer. The length of t
49、ime on file shall be in accordance withthe manufacturers quality assurance procedures.15. Certification15.1 Certification of Testing (see 13.2).15.2 Certification of Material.15.2.1 A certificate of compliance shall be obtained fromthe material supplier, when applicable. This certificate shallstate that applicable requirements for the raw material havebeen met. As a minimum, the material specification shallspecify the chemical and mechanical requirements of thematerial, as applicable.16. Product Marking16.1 Product Mark
