1、Designation: D 5421 05An American National StandardStandard Specification forContact Molded “Fiberglass” (Glass-Fiber-ReinforcedThermosetting Resin) Flanges1This standard is issued under the fixed designation D 5421; the number immediately following the designation indicates the year oforiginal adop
2、tion 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. Scope*1.1 This specification covers circular contact-molded fiber-glass reinforc
3、ed-thermosetting-resin flanges for use in pipesystems and tank nozzles. Included are requirements formaterials, workmanship, performance, and dimensions.1.2 Flanges (see Fig. 1) may be produced as integral flanges,Type A, or flange-on-pipe, Type B.1.3 This specification is based on flange performanc
4、e anddoes not cover design.1.4 These flanges are designed for use with pipe and tanksthat are manufactured to Specifications D 2996, D 2997,D 3262, D 3299, D 3517, D 3754, D 3982, and D 4097.1.5 Selection of gaskets is not covered in this specification,refer to the manufacturers recommendation.NOTE
5、1ISO EquivalentThere is no similar or equivalent ISOstandard.1.6 The values stated in inch-pound units are to be regardedas the standard. The SI units given in parentheses are forinformation only.1.7 The following precautionary caveat pertains only to thetest methods portion, Section 9, of this spec
6、ification: Thisstandard does not purport to address the safety problems, ifany, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Docu
7、ments2.1 ASTM Standards:2C 582 Specification for Contact-Molded Reinforced Ther-mosetting Plastic (RTP) Laminates for Corrosion Resis-tant EquipmentD 883 Terminology Relating to PlasticsD 1599 Test Method for Short-Time Hydraulic Failure Pres-sure of Plastic Pipe, Tubing, and FittingsD 1600 Terminol
8、ogy for Abbreviated Terms Relating toPlasticsD 2310 Classification for Machine-Made Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) PipeD 2996 Specification for Filament Wound “Fiberglass”(Glass-Fiber-Reinforced Thermosetting Resin) PipeD 2997 Specification for Centrifugally Cast “Fiberglass
9、”(Glass-Fiber-Reinforced Thermosetting Resin) PipeD 3262 Specification for Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Sewer PipeD 3299 Specification for Filament-Wound Glass-Fiber-Reinforced Thermoset Resin Corrosion-Resistant TanksD 3517 Specification for Fiberglass (Glass-Fiber-Reinfo
10、rced Thermosetting Resin) Pressure PipeD 3754 Specification for Fiberglass Sewer and IndustrialPressure PipeD 3982 Specification for Custom Contact-PressureMolded-Glass-Fiber-Reinforced Thermosetting Resin HoodsD 4097 Specification for Contact Molded Glass-Fiber-Reinforced Thermoset Resin Chemical R
11、esistant Tanks2.2 ANSI Standards:B 16.1 Cast Iron Pipe Flanges and Flanged Fittings3B 16.5 Pipe Flanges and Flanged Fittings3B 27.2 Type “A” Narrow Washers31This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.23 on Reinfo
12、rcedPlastic Piping Systems and Chemical Equipment.Current edition approved July 1, 2005. Published August 2005. Originallyapproved in 1993. Last previous edition approve in 2000 as D 5421 00.2Annual Book of ASTM Standards, Vol 08.04.3Available from American National Standards Institute, 11 West 42nd
13、 Street,13th Floor, NY, NY 10036.FIG. 1 Flange Types1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Terminology3.1 Definitions:3.1.1 Definitions are in accordance w
14、ith TerminologyD 883. Abbreviations are in accordance with TerminologyD 1600, unless otherwise indicated. The abbreviation forreinforced-thermosetting-resin pipe is RTRP.3.2 Definitions of Terms Specific to This Standard: Descrip-tions of Terms Specific to This Standard:3.2.1 contact molding (CM)a m
15、ethod of fabricationwherein the glass fiber reinforcement is applied to the mold inthe form of all chopped-strand mat, or chopped-strand mat andwoven roving, in alternate plies by hand with the resin matrixapplied by brush or roller and the laminate consolidated by aroller.3.2.2 fiberglass pipea tub
16、ular product containing glass-fiber reinforcements embedded in or surrounded by curedthermosetting resin; the composite structure may containaggregate, granular or platelet fillers, thixotropic agents, pig-ments or dyes; thermoplastic or thermosetting liners or coat-ings may be included.4. Classific
17、ation4.1 GeneralThis specification covers reinforced-thermosetting-resin flanges defined by type (method of manu-facture), grade (generic type of resin), class (pressure endthrust capability), and pressure rating. Flanges complying withthis specification are also given numerical classifications rela
18、t-ing to rupture pressure and sealing test pressure.4.1.1 Types:4.1.1.1 Type AIntegral flange, contact molded with thestub integral with the flange.4.1.1.2 Type BFlange on pipe, contact molded onto anexisting pipe or fitting.4.1.2 Grades:4.1.2.1 Grade 1Epoxy resin.4.1.2.2 Grade 2Polyester resin.4.1.
19、2.3 Grade 3 Phenolic resin.4.1.2.4 Grade 4Vinylester resin.4.1.2.5 Grade 5Furan resin.4.1.3 Classes:4.1.3.1 Class IHoop and axial-pressure.4.1.3.2 Class IIHoop pressure only.NOTE 2All combinations of type, liner, grade, and class may not becommercially available. Additional type, liner, grade, and c
20、lass may beadded as they become commercially available. The purchaser shouldsolely determine or consult with the manufacturer for the proper class,type, liner, and grade to be used under the installation and operatingconditions that will exist for the project in which the flange is to be used.4.1.4
21、Pressure RatingPressure rating shall be categorizedby single-letter designation. Pressure designations are shown inTable 1.4.1.5 Short-term rupture pressure and sealing-test pressurelimits shall be categorized by single arabic number designa-tions as indicated by the cell classification system of Ta
22、ble 2.4.2 Designation CodeThe flange-designation code shallconsist of the abbreviation for contact molded (CM) followedby the type as a capital letter, grade as an Arabic numeral, classas a Roman numeral, and the pressure-rating category as acapital letter and two Arabic numbers identifying the cell
23、-classification designations of the short-term rupture pressureand sealing-test pressure, respectively. Thus, a completeflange-designation code shall consist of three letters, oneArabic numeral, one Roman numeral, one letter and twonumerals.4.2.1 ExampleContact molded fiberglass is CM-AlID-46.This d
24、esignation described a stub flange, made using glass-fiber-reinforced epoxy resin for full-axial pressure thrust. Theflange has a 100-psi (0.69-MPa) pressure rating, a short-termrupture pressure of 400-psi (2.76-MPa), and a sealing-testpressure of 225-psi (1. 55-MPa).4.3 Attachment of Flanges to Pip
25、e, Pipe Fittings, or Tanks:4.3.1 Type “A” flanges are to be butt and strap welded topipe described in Specifications D 2996, D 2997, D 3262,D 3517, D 3754, and D 3982 or using overlay joint into a tankas described in Specifications D 3299 and D 4097.4.3.2 Type “B” flanges are built onto elbows, redu
26、cers, orother parts where the use of an integral flange (Type “A”) is notpractical or required.5. Materials and Manufacture5.1 Flanges manufactured in accordance with this specifi-cation shall be composed of reinforcement embedded in orsurrounded by cured thermosetting resin.5.2 The resins, reinforc
27、ements, and other materials, whencombined into composite structure, shall produce a flange thatwill meet the performance requirements of this specification.NOTE 3The term “other materials” does not include recycled orreprocessed thermosetting plastics which might otherwise be added asfillers.5.3 Fla
28、nges manufactured in accordance with this specifi-cation shall have an inner corrosion barrier fabricated with thesame resin, reinforcement, ply sequence, and nominal glass/resin ratio as required in the applicable ASTM standard for thetank or pipe on which the flange will be used.6. Performance Req
29、uirements6.1 The following performance requirements are intended toprovide classification and performance criteria for the purposeTABLE 1 Pressure CategoriesDesignationPressure RatingApsi MPaA 25 0.173B 50 0.345C 75 0.517D 100 0.690E 125 0.862F 150 1.034AFlanges with higher pressure ratings are avai
30、lable by agreement between thepurchaser and the manufacturer.TABLE 2 Short-Term Rupture Pressure and Sealing-TestPressureAProperty/Cell Classification 123456Short-Term Rupture 100 200 300 400 500 600Pressure, psi (MPa) (0.69) (1.38) (2.07) (2.76) (3.45) (4.14)Sealing-test pressure, psi 37.5 75 112.5
31、 150 187.5 225(MPa) (0.26) (0.52) (0.78) (1.03) (1.29) (1.55)ARefer to Test Method D 1599 for explanation of failure.D 5421 052of qualification testing and rating of prototype constructionsand periodic reevaluation of the manufacturers stated ratings.They are not intended as routine quality assuranc
32、e require-ments for production runs of rated flanges:6.1.1 SealingFlanges shall withstand a pressure of at least1.5 times the pressure rating without leakage when tested inaccordance with 9.4.6.1.2 Short-Term Rupture StrengthFlanges shall with-stand a hydrostatic load of at least four times their pr
33、essurerating when tested in accordance with 9.5 using flat-faced steelclosure and using the gasket or “O” ring designated by theflange manufacturer.6.1.3 Bolt TorqueFlanges shall withstand, without visiblesign of damage, a bolt torque of two times that recommendedby the manufacturer. The use of a no
34、n-fluid thread lubricant isrecommended on all bolts.7. Dimensions and Tolerances7.1 Flange and Bolt DimensionsFlanges of 24 in. (610mm) or smaller diameter shall conform to the values for boltcircle and number and size of bolt holes, for Class-150 castiron flanges in ANSI B 16.5. Flanges larger than
35、 24 in. (610mm) in diameter shall conform to the values for bolt circle,number and size of bolt holes, for Class-125 cast-iron flangesin ANSI B 16.1 as shown in Table 3. The tolerance for theseflange dimensions shall be the same as those contained inANSIB 16.1 and B 16.5. A flat washer is to be used
36、 under all boltheads and nuts.NOTE 4Interference between the hub and bolt spot face may occur,especially in high-pressure flanges. The use of ANSI B 27.2 narrowwashers is suggested because of their smaller outside diameter. Thecustomer should be notified when these washers with smaller outsidediamet
37、er are to be used.NOTE 5For special-design large flanges, it may be desirable toprovide the required bolt area by using smaller bolts spaced closertogether than is normally used for steel flanges. The minimum bolt sizeshall be58 in. (16 mm).7.1.1 Flange Face for Full-Faced Gaskets The flangeface sha
38、ll be perpendicular to the axis of the fitting within12 ,and shall be flat to132 in. (1 mm) for sizes up to and including18-in. (457-mm) diameter and116 in. (2 mm) for largerdiameters. For other sealing systems the tolerances must beestablished to meet the requirements of 6.1.1.7.1.2 Washer-Bearing
39、SurfaceWasher-bearing surfaceshall be flat and parallel to the flange face within 1.7.1.3 Flange Outside DiameterOutside diameter offlanges is to be at least equal to that of ANSI B 16.5 for up to24-in. (610-mm) inside diameter and ANSI B 16.1 for largerflanges. It is accepted practice to increase a
40、ll flange outsidediameters to provide greater strength at the bolt holes.8. Workmanship, Finish, and Appearance8.1 Workmanship and appearance shall conform to Table 5on visual acceptance criteria of standard C 582 for the processside, and shall be as free as commercially practical of defects,includi
41、ng indentations, delaminations, bubbles, pinholes, for-eign inclusions, and resin-starved areas in the structural layerand outer surface as agreed upon between the purchaser and themanufacturer.9. Test Methods9.1 ConditioningWhen conditioning is required, and inall cases of disagreement, condition t
42、he test specimens at 73.46 3.6F (23 6 2C) for not less than 40 h prior to test, inaccordance with Procedure A of Test Methods D 618.9.2 Test ConditionsThe tests may be conducted at ambi-ent temperature and humidity conditions. When controlled-environment testing is specified, conduct test at 73.4 6
43、3.6F(23 6 2C). When elevated-temperature testing is specified,conduct the tests at the design operating temperature, with atolerance of 6 3.6F (2C).9.3 Dimensions and TolerancesMeasure flange dimen-sions with a micrometer, vernier calipers, or other suitablemeasuring devices accurate to within 50 %
44、of the requiredtolerance. Determine diameters by averaging a minimum offour measurements, equally spaced circumferentially.9.4 SealingBolt together flanged components in generalaagreement with Fig. 2 using the gasket and bolt torquerecommended for standard field installation by the flangemanufacture
45、r. Then pressure test the assembly and require it tohold the test pressure for a period of 168 h without leakage.Retorquing to the manufacturers specified level after initialpressurization is permitted.TABLE 3 Flange DimensionsNominalPipe Size,in.AOutsideDiameter,min, in.ADrillingBolt CircleDiameter
46、ANumber ofHolesDiameter ofHolesADiameter ofBoltsA1414 318 45812112 5378 4581226434 43458212 7512 434583712 643458312 812 78345849712 83458510812 87834611912 8783481312 1134 8783410 16 1414 12 17812 19 17 12 17814 21 1834 12 118 116 2312 2114 16 118 118 25 2234 16 114 11820 2712 25 20 114 11824 32 29
47、12 20 138 11426 3414 3134 24 138 11428 3612 34 28 138 11430 3834 36 28 138 11432 4134 3812 28 158 11234 4334 4012 32 158 11236 46 4234 32 158 11238 4834 4514 32 158 11240 5034 4714 36 158 11242 53 4912 36 158 11244 5514 5134 40 158 11246 5714 5334 40 158 11248 5912 56 44 158 11250 6134 5814 44 178 1
48、3452 64 6012 44 178 13454 6614 6234 44 178 13460 73 6914 52 178 13466 80 76 52 178 13472 8612 8212 60 178 13484 9934 9512 64 218 296 11314 10812 68 238 214A1 in. = 25.4 mm.D 5421 0539.5 Short-Term-Rupture StrengthHydrostatically testflanged components in accordance with Test Method D 1599with free-e
49、nd closure for Class I flanges and fixed-end closurefor Class II flanges except as herein noted. Increase thepressure in the specimen until failure of the flange occurs.Pressure testing in an atmospheric environment is permissible.Minimum-failure time shall be 60 s; no restriction shall beplaced on maximum time-to-failure. Leaking past the gasketinterface is permissible during this test. Bolt torque may beincreased
