1、Designation: C1729 13aStandard 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 cladding (as related to insulation jacketing)
11、synonymous with jacketing3.2.2.1 DiscussionThe three terms “jacketing”, “lagging”,and “cladding” are considered synonymous in most metaljacket related applications and geographies. However, in somecases in the power industry in North America the term“lagging” has a different meaning than “jacketing”
12、 or “clad-ding” and refers specifically to a heavier gauge of jacketing.3.2.3 crevice corrosionLocalized corrosion of metal jack-eting surface at, or immediately adjacent to, an area that is1This specification is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct res
13、ponsibility of Subcommittee C16.40 onInsulation Systems.Current edition approved Sept. 1, 2013. Published October 2013. Originallyapproved in 2010. Last previous edition approved in 2013 as C172913. DOI:10.1520/C172913A.2The boldface numbers in parentheses refer to a list of references at the end of
14、this standard.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Ins
15、titute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1shielded from full exposure to the environment because ofclose proximity between the metal and the surface
16、 of anothermaterial.3.2.4 cross 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 o
17、ther non-straight portions of the piping system made from a multitude ofsimilar overlapping pieces3.2.8 lagging (as related to insulation jacketing)synonymous with jacketing3.2.8.1 DiscussionThe three terms “jacketing”, “lagging”,and “cladding” are considered synonymous in most metaljacket related a
18、pplications and geographies. However, in somecases in the power industry in North America the term“lagging” has a different meaning than “jacketing” or “clad-ding” and refers specifically to a heavier gauge of jacketing.3.2.9 moisture retarder (moister barrier)a layer of plasticfilm or other materia
19、l applied to the inner side of metaljacketing to inhibit jacket corrosion by interfering with theformation of a galvanic cell between the dissimilar metals ofthe pipe and jacket or by preventing crevice corrosion3.2.9.1 DiscussionA moisture retarder is not an insulationsystem water vapor retarder an
20、d does not perform the samefunction.3.2.10 polykrafta multilayer composite film used as amoisture retarder on 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
21、multilayer film used as a moistureretarder on metal jacketing consisting of at least one layer ofethylene/methacrylic acid copolymer and one or more layers ofother polymers, usually polyethylene.3.2.12 safety edgean edge of metal jacketing that hasbeen de-burred or rounded by a rolling operation3.2.
22、13 safety hema rounded edge of metal jacketing cre-ated by folding the edge of sheet jacketing completely backupon itself using a roll former or a brake.3.2.13.1 DiscussionThe fold is typically made toward theunderside of the jacketing so that the original edge is hiddenand the external appearance o
23、f the jacketing is preserved.3.2.14 splice rollmetal jacketing sold in roll form wherethe package contains two separate pieces of metal jacketingrolled approximately end to end.3.2.14.1 DiscussionA splice roll occurs when the metalcoil being used to form the roll jacketing reaches its end beforethe
24、required roll length is obtained.3.2.15 split rollsynonymous with splice roll.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 determiningthe syste
25、m 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 ():5.1.1.1 Type I = Bare surface, = 0.1,5.1.1.2 Type II = Painted with pigmented pa
26、int, = 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 surface.5.1.2
27、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 3004,5.1.2.5 Grade 5 = Alloy Alclad 3004 (a
28、lloy 3004 clad bothsides with alloy 7072 for improved corrosion resistance), and5.1.2.6 Grade 6 = Alloy 5052.5.1.3 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
29、 was removed in 2011 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 s
30、everal components. The 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 tha
31、t is smooth,316 in. corrugated, or stucco embossed.The dimensions of corrugations (pitch and depth) must beagreed to by manufacturer and purchaser to achieveinterchangeability, constant rigidity, and appearance.6.3 When agreed upon by purchaser and seller, aluminumsheets used as pipe insulation jack
32、eting (see 8.2) shall have asafety edge or a38 to12 in. (9.5 to 12.7 mm) safety hem alongone entire width edge of the sheet. Aluminum jacketing with asafety edge or safety hem must still meet the length dimensionsspecified in 8.2.1.Asafety hem shall not be specified when thefinish is316 in. corrugat
33、ed.C1729 13a26.4 In most cases, the inner surface of aluminum jacketingmaterial is coated or covered with a moisture resistant film toretard possible galvanic or chemical corrosion, or both, of thejacketing.6.5 For highly corrosive ambient conditions or to increaseemittance, the purchaser shall spec
34、ify that the outer surface ofthe aluminum be coated with a pigmented or unpigmentedpaint or with a plastic film.6.6 The aluminum used in this jacketing, with the exceptionof box rib, shall be manufactured from Specification , alloys3003, 3105, or 1100 with tempers of H14 (half hard), H12(quarter har
35、d), or dead soft Grades 1, 2, or 3 per 5.1.2.6.7 Aluminum jacketing shall be specified by the thicknessof the aluminum layer which shall be in the range from 0.016to 0.050 in. (0.41 to 1.27 mm).NOTE 2The thickness values mentioned in 6.6, 6.8, and 6.7 arenominal thickness. The tolerances shown in Ta
36、ble 1 apply to these listednominal values.6.8 The measured thickness of metal jacketing will beinfluenced by any forming or rolling such as that described in10.5.All requirements for and discussion of jacketing thicknessand thickness tolerance in this document including Table 2 andTable 1 apply to t
37、he base metal before any forming or rollingand do not include any coatings or films that are applied to thesurface such as the moisture barriers described in 5.1.3.6.9 Box rib aluminum jacketing pieces shall be manufac-tured from Specification B209, alloys 3003 or 3105 (Grade 1),alloys 3004 or Alcla
38、d 3004 (Grades 4 and 5), or alloy 5052(Grade 6) per Section 5.1.2 and shall be 0.032 in. (0.8 mm),0.040 in. (1.0 mm), 0.048 in. (1.2 mm), or 0.050 in (1.3 mm)thick.NOTE 3Typical box rib widths available are 45-58 in. (1159 mm), 38.5in. (978 mm), and 27.5 in. (699 mm). Typical lengths available are 8
39、, 10,and 12 ft (2.4, 3.0, and 3.7 m). The pattern of grooves and ridges typicallyrepeats on 4 in. (102 mm) centers and the height of each rib is typically1 in. (25 mm).6.10 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
40、), 0.040 in. (1.0 mm), or 0.048 in. (1.2 mm)thick.6.10.1 Typical deep corrugated width is 33 in. (838 mm)and typical 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 m
41、m) height. For specific repeating patterndistances, the manufacturer shall be consulted.7. Physical Properties7.1 Required physical properties are shown in Table 2 andTable 3.NOTE 4See section 10.9 for further information regarding Table 2.7.2 All aluminum jacketing shall demonstrate a flamespread o
42、f 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 5Aluminum jacketing is not typically considered a fire resistantmaterial. If a higher level of fire resistance or protection is required,alternativ
43、e jacketing materials usually based on steel, should be consid-ered.7.3 Unless otherwise specified by the manufacturer, theemittance of the jacketing shall be considered 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 f
44、or 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 6Testing of the emittance of Type I has yielded initialunoxidized values ranging from 0.03 to 0.05 and oxidized “in-service”values ranging from 0.
45、1 to 0.31 (2, 3, 4, 5, 6). The use of an emittance ofTABLE 1 Permissible Thickness TolerancesNominal thickness inin.(mm)Thickness tolerance in in. (mm) forUp to 39.4 in. (1 m) wide jacketingand deep corrugated sheet48 in. (1.22 m) wide jacketingand box rib sheetover 0.010 through 0.016(over 0.254 th
46、rough 0.406)0.0010 (0.0254) 0.0015 (0.0381)over 0.016 through 0.025(over 0.406 through 0.635)0.0015 (0.0381) 0.0020 (0.0508)over 0.025 through 0.032(over 0.635 through 0.813)0.0020 (0.0508) 0.0025 (0.0635)over 0.032 through 0.039(over 0.813 through 0.991)0.0020 (0.0508) 0.0030 (0.0762)over 0.039 thr
47、ough 0.047(over 0.991 through 1.194)0.0025 (0.0635) 0.0035 (0.0889)over 0.047 through 0.063(over 1.194 through 1.600)0.0030 (0.0762) 0.0035 (0.0889)TABLE 2 Minimum Thickness for Pipe JacketingMinimum Allowable Aluminum Thickness (in.)Outer InsulationDiameter (in.)RigidInsulationNon-RigidInsulation#
48、8 0.016 0.016over 8 through 11 0.016 0.020over 11 through 24 0.016 0.024over 24 through 36 0.020 0.032over 36 0.024 0.040C1729 13a30.1 is recommended here as being the most conservative value. 7.3addresses the situation where a user of this standard wishes to consider adifferent emittance value.7.4
49、Permissible thickness tolerances vary with nominalthickness and are shown in Table 1. Thickness is measured per11.3.7.5 Requirements for permissible pinholes in the moistureretarder when tested per 11.4 are shown in Table 3.7.6 The moisture retarder shall have no visual defect thatwill affect performance and shall be free of laminatedseparations, holes, rips, tears, scratches, dents, non-uniformedges, or creases.7.7 Requirements for water vapor transmission rate(WVTR) of the moisture retarders tested per 11.6 are sho
