ASTM C1729-2012a Standard Specification for Aluminum Jacketing for Insulation《绝缘铝护套的标准规格》.pdf

1、Designation: C1729 12aStandard Specification forAluminum Jacketing for Insulation1This standard is issued under the fixed designation C1729; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in par

2、entheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers aluminum jacketing for ther-mal and acoustical insulation operating at either above orbelow ambient temperatures and in bo

3、th indoor and outdoorlocations. It does not cover insulation jacketing made fromother materials such as mastics, fiber reinforced plastic, PVC,or stainless steel nor does it cover the details of thermal oracoustical insulation systems.1.2 This specification provides physical requirements foraluminum

4、 jacketing for thermal and acoustical insulation.Guide C1423 provides guidance in selecting jacketing materi-als and their safe use.1.3 This is a material specification and does not imply anyperformance of the installed system using the materials speci-fied herein. For information about installation

5、 of aluminumjacketing, see (1).21.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of

6、thesafety concerns, if any, associated with its use. It is theresponsibility of the user 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:3B209 Specification for Al

7、uminum and Aluminum-AlloySheet and PlateC168 Terminology Relating to Thermal InsulationC450 Practice for Fabrication of Thermal Insulating FittingCovers for NPS Piping, and Vessel LaggingC585 Practice for Inner and Outer Diameters of ThermalInsulation for Nominal Sizes of Pipe and TubingC835 Test Me

8、thod for Total Hemispherical Emittance ofSurfaces up to 1400CC1371 Test Method for Determination of Emittance ofMaterials Near Room Temperature Using Portable Emis-sometersC1423 Guide for Selecting Jacketing Materials for ThermalInsulationD3363 Test Method for Film Hardness by Pencil TestE84 Test Me

9、thod for Surface Burning Characteristics ofBuilding MaterialsF1249 Test Method for Water Vapor Transmission RateThrough Plastic Film and Sheeting Using a ModulatedInfrared Sensor2.2 ANSI Standard:4ANSI H35.2/H35.2(M) Dimensional Tolerances for Alumi-num Mill Products3. Terminology3.1 DefinitionsDefi

10、nitions in Terminology C168 apply toterms used in this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 box ribaluminum sheet formed to have alternatingparallel grooves and ridges with a cross section approximatinga square wave3.2.2 claddingsynonymous with jacketing3.2.3 crevic

11、e corrosiona type of corrosion occurring onmetal jacketing caused by differences in oxygen concentrationin the electrolyte in adjacent regions of the material. Thesedifferences lead to a concentration cell and the region on themetal jacketing which is oxygen-starved is subject to corro-sion.3.2.4 cr

12、oss crimpedsynonymous with316 in. corrugated3.2.5 deep corrugatedaluminum sheet formed to havealternating parallel grooves and ridges with a cross sectionapproximating a sine wave3.2.6 finishthe texture of the aluminum surface3.2.7 gorejacketing for elbows, fittings, or other non-straight portions o

13、f the piping system made from a multitude ofsimilar overlapping pieces1This specification is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct responsibility of Subcommittee C16.40 onInsulation Systems.Current edition approved March 1, 2012. Published June 2012. Ori

14、ginallyapproved in 2010. Last previous edition approved in 2012 as C172912. DOI:10.1520/C172912A.2The boldface numbers in parentheses refer to a list of references at the end ofthis standard.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serv

15、iceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1Copyright ASTM International, 100 Barr Har

16、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.8 laggingsynonymous with jacketing3.2.9 moisture retarder (moister barrier)a layer of plasticfilm or other material applied to the inner side of metaljacketing to inhibit jacket corrosion by interfering with theformation of

17、a galvanic cell between the dissimilar metals ofthe pipe and jacket or by preventing crevice corrosion.3.2.9.1 DiscussionAmoisture retarder is not an insulationsystem water vapor retarder and does not perform the samefunction.3.2.10 polykraft a multilayer composite film used as amoisture retarder on

18、 metal jacketing consisting of at least onelayer of minimum 40 lb kraft paper and one or more layers ofplastic film, usually polyethylene at a minimum thickness of1.5 mils.3.2.11 polysurlyna multilayer film used as a moistureretarder on metal jacketing consisting of at least one layer ofethylene/met

19、hacrylic acid copolymer and one or more layers ofother polymers, usually polyethylene.4. Significance and Use4.1 This specification is used to specify material by physicalproperty requirements that address the prerequisites in Sections6 to 10. The designer of an insulation system, after determiningt

20、he system requirements, shall use this specification to specifythe appropriate aluminum jacketing.5. Classification5.1 Classification of aluminum jacketing is based on threefactors:5.1.1 Outer surface treatment and emittance (e):5.1.1.1 Type I = Bare surface, = 0.15.1.1.2 Type II = Painted with pigm

21、ented paint, = 0.8,5.1.1.3 Type III = Painted with unpigmented paint, = 0.5,and5.1.1.4 Type IV = Plastic film coated surface, = 0.85.5.1.1.5 Paint systems for Types II and III must be factoryapplied and baked on.5.1.1.6 Plastic film for Type IV must be factory applied andheat laminated to the surfac

22、e.5.1.2 Alloy and Temper per Specification B209:5.1.2.1 Grade 1 = Alloy 3105 or 3003, half hard temper(H14,)5.1.2.2 Grade 2 = Alloy 3105 or 3003, quarter hard temper(H12 - lock forming quality),5.1.2.3 Grade 3 = Alloy 1100, dead soft temper,5.1.2.4 Grade 4 = Alloy 3004, and5.1.2.5 Grade 5 = Alloy Al

23、clad 3004 (alloy 3004 clad bothsides with alloy 7072 for improved corrosion resistance).5.1.3 Moisture Retarder:5.1.3.1 Class A = polysurlyn, 3 mil thick,5.1.3.2 Class C = polykraft per section 3.2.10,5.1.3.3 Class D = painted, and5.1.3.4 ClassE=nomoisture retarder.NOTE 1Class B was removed in 2011

24、because it was not used orproduced. The remaining Classes were not renumbered to avoid conflictswith engineering specifications that reference the remaining Classes.6. Materials and Manufacture6.1 Aluminum jacketing materials are composed of a singlematerial or a lamination of several components. Th

25、e materialsare supplied in the form of rolls or sheets or preformed to fit thesurface to which they are to be applied. The materials areapplied in the field or as a factory-applied composite with theinsulation.6.2 The primary material shall be aluminum and shall havea finish that is smooth,316 in. c

26、orrugated, or stucco embossed.The dimensions of corrugations (pitch and depth) must beagreed to by manufacturer and purchaser to achieve inter-changeability, constant rigidity, and appearance.6.3 In most cases, the inner surface of aluminum jacketingmaterial is coated or covered with a moisture resi

27、stant film toretard possible galvanic or chemical corrosion, or both, of thejacketing.6.4 For highly corrosive ambient conditions or to increaseemittance, the purchaser shall specify that the outer surface ofthe aluminum be coated with a pigmented or unpigmentedpaint or with a plastic film.6.5 The a

28、luminum used in this jacketing, with the exceptionof box rib, shall be manufactured from Specification B209,alloys 3003, 3105, or 1100 with tempers of H14 (half hard),H12 (quarter hard), or dead soft Grades 1, 2, or 3 per 5.1.2.6.6 Aluminum jacketing shall be specified by the thicknessof the aluminu

29、m layer which shall be in the range from 0.016to 0.050 in. (0.41 to 1.27 mm)6.7 Box rib aluminum jacketing pieces shall be manufac-tured from Specification B209, alloys 3003 or 3105 (Grade 1)or alloys 3004 or Alclad 3004 (Grades 4 and 5) per Section5.1.2 and shall be 0.032 in. (0.8 mm), 0.040 in. (1

30、.0 mm), 0.048in. (1.2 mm), or 0.050 in (1.3 mm) thick.NOTE 2Typical box rib widths available are 45-58 in. (1159 mm),38.5 in. (978 mm), and 27.5 in. (699 mm). Typical lengths available are 8,10, and 12 ft (2.4, 3.0, and 3.7 m). The pattern of grooves and ridgestypically repeats on 4 in. (102 mm) cen

31、ters and the height of each rib istypically 1 in. (25 mm).6.8 Deep corrugated aluminum jacketing pieces shall be0.016 in. (0.4 mm), 0 .020 in. (0.5 mm), 0.024 in. (0.6 mm),0.032 in. (0.8 mm), 0.040 in. (1.0 mm), or 0.048 in. (1.2 mm)thick.6.8.1 Typical deep corrugated width is 33 in. (838 mm) andtyp

32、ical length is 6 to 12 ft (1.8 to 3.7 m). Two nominalrepeating patterns are common 1-14 in. (32 mm) on centerswith a14 in. (6 mm) height and a 2-12 in. (64 mm) on centerswith a58 in. (16 mm) height. For specific repeating patterndistances, the manufacturer shall be consulted.7. Physical Properties7.

33、1 Required physical properties are shown in Table 1 andTable 2.7.2 All aluminum jacketing shall demonstrate a flamespread of 25 or less and smoke developed of 50 or less whentesting the outer side (the side opposite that contacting theinsulation) in accordance with 11.2.NOTE 3Aluminum jacketing is n

34、ot typically considered a fire resistantmaterial. If a higher level of fire resistance or protection is required,C1729 12a2alternative jacketing materials usually based on steel, should be consid-ered.7.3 Unless otherwise specified by the manufacturer, theemittance of the jacketing shall be consider

35、ed to be:7.3.1 Type I = 0.1 which is typical for a normally oxidizedaluminum jacket in service,7.3.2 Type II = 0.8 which is typical for a pigmented paint,7.3.3 Type III = 0.5 which is typical of an unpigmentedpaint, and7.3.4 Type IV = 0.85 which is typical of a plastic filmsurface.NOTE 4Testing of t

36、he emittance of Type I has yielded initial unoxi-dized values ranging from 0.03 to 0.05 and oxidized “in-service” valuesranging from 0.1 to 0.31 (2, 3, 4, 5, 6). The use of an emittance of 0.1 isrecommended here as being the most conservative value. 7.3 addresses thesituation where a user of this st

37、andard wishes to consider a differentemittance value.7.4 Permissible thickness tolerances vary with nominalthickness and are shown in Table 3. Thickness is measured per11.3.7.5 Requirements for permissible pinholes in the moistureretarder when tested per 11.4 are shown in Table 2.7.6 The moisture re

38、tarder shall have no visual defect thatwill affect performance and shall be free of laminated separa-tions, holes, rips, tears, scratches, dents, non-uniform edges, orcreases.7.7 Requirements for water vapor transmission rate(WVTR) of the moisture retarders tested per 11.6 are shown inTable 2. Testi

39、ng the WVTR of moisture retarders is notpossible after they are applied to the aluminum jacketing sothis testing shall be done on the moisture retarders prior toapplication.8. Dimensions and Permissible Variations8.1 Dimensions for aluminum jacketing shall be as agreedto by purchaser and seller.8.2

40、When cut into sheets for use as pipe insulation jacketing,the dimension of the aluminum jacketing sheet designed toaccommodate the pipe insulation circumference shall be calledthe length and the other major dimension shall be identified asthe width.8.2.1 The length shall be a minimum of the outer ci

41、rcum-ference of the insulation plus 2 in. (51 mm) for insulation outerdiameter # 20 in. (508 mm) and a minimum of the outercircumference of the insulation plus 2.5 in. (64 mm) forinsulation outer diameter 20 in. (508 mm).8.2.2 Typical width is 36 in. (0.91 m), 48 in. (1.22 m), or 1meter (39.4 in.).8

42、.2.3 Dimensions differing from these standards are pos-sible but must be agreed to by purchaser and seller.8.2.4 Tolerances for aluminum jacketing sheets shall be 618 in. (6 3mm) in width and length.8.3 When cut into sheets for use as equipment and vesselinsulation jacketing, the longer dimension of

43、 the box rib orcorrugated aluminum jacketing sheet shall be called the lengthand the other (shorter) major dimension shall be identified asthe width.8.3.1 Typical width of deep corrugated aluminum sheet is33 in. (838 mm).8.3.2 Typical lengths of deep corrugated aluminum sheet are6 to 12 ft (1.8 to 3

44、.7 m).8.3.3 Typical widths of box rib aluminum sheet are 45-58 in.(1159 mm), 38.5 in. (978 mm), and 27.5 in. (699 mm).8.3.4 Typical lengths of box rib aluminum sheet are 8, 10,and 12 ft (2.4, 3.0, and 3.7 m)8.3.5 Dimensions differing from these standards are pos-sible but must be agreed to by purcha

45、ser and seller.8.3.6 Width and length tolerances for aluminum jacketingdeep corrugated sheets and box rib shall be 618 in. (6 3mm)within a lot and 612 in. (6 13 mm) between lots.8.4 When aluminum jacketing is provided in rolls, thelonger dimension is called the length and the shorter dimensionis cal

46、led the width.8.4.1 Tolerances for roll materials shall be 618 in. (6 3mm) on width and + 5,0%onlength.9. Workmanship, Finish and Appearance9.1 There shall be no defects in materials or workmanshipthat will affect the required performance of the aluminumjacketing.9.2 There shall be no defects that a

47、dversely affect theappearance of the aluminum jacketing.9.3 There shall be no defects that would affect the ability ofthe user to process the aluminum jacketing material.10. Requirements of Aluminum Jacketing10.1 The main purposes of aluminum jacketing are toprovide physical damage resistance, UV pr

48、otection, and toshed liquid water minimizing the amount entering the insula-tion system.10.2 If greater levels of corrosion resistance are desired thanthat achieved with plain aluminum, a painted or coatedaluminum (Types II, III, or IV) shall be considered. If evengreater levels of corrosion resista

49、nce are desired, use ofstainless steel jacketing shall be considered.10.3 The applications for aluminum jacketing are catego-rized into three areas; straight pipe, pipe elbows/fittings, andvessels/equipment. The requirements for each of these appli-cations differ.10.4 Aluminum jacketing on straight pipe10.4.1 At the point of application, aluminum jacketing usedon straight pipe will consist of a multitude of pre-curved pieceswith dimensions per 8.2.TABLE 1 Minimum Thickness for Pipe JacketingMinimum Allowable Aluminum Thickness (in.)Outer