1、Designation: C1729 15aStandard 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. No other units of measurement are included in thisstandard.NOTE 1A version of this specification in SI units is available asC1729M.1.5 This standard does not purport to address all of thesafety c
6、oncerns, 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 Aluminum and
7、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 Method for To
8、tal 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 ThermalInsulationC1729M Specification for Aluminum Jacketing for Insula-tionC1785 Test Me
9、thod for Concentration of Pinhole Detectionsin Moisture Barriers on Metal JacketingD3363 Test Method for Film Hardness by Pencil TestE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsF1249 Test Method for Water Vapor Transmission RateThrough Plastic Film and Sheeting Using a Mo
10、dulatedInfrared Sensor2.2 ANSI Standard:4ANSI H35.2/H35.2(M) Dimensional Tolerances for Alumi-num Mill Products3. Terminology3.1 DefinitionsDefinitions 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 t
11、o have alternatingparallel grooves and ridges with a cross section approximatinga square wave3.2.2 cladding (as related to insulation jacketing)synonymous with jacketing3.2.2.1 DiscussionThe three terms “jacketing”, “lagging”,and “cladding” are considered synonymous in most metaljacket related appli
12、cations and geographies. However, in somecases in the power industry in North America the term1This 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 Nov. 1, 2015. P
13、ublished December 2015. Originallyapproved in 2010. Last previous edition approved in 2015 as C172915. DOI:10.1520/C172915A.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 AS
14、TM 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 Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM I
15、nternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1“lagging” has a different meaning than “jacketing” 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 im
16、mediately adjacent to, an area that isshielded from full exposure to the environment because ofclose proximity between the metal and the surface of anothermaterial.3.2.4 cross crimpedsynonymous with316 in. corrugated3.2.5 deep corrugatedaluminum sheet formed to havealternating parallel grooves and r
17、idges 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 of the piping system made from a multitude ofsimilar overlapping pieces3.2.8 lagging (as related to insulation jacketing)synonymo
18、us with jacketing3.2.8.1 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” or “cla
19、d-ding” and refers specifically to a heavier gauge of jacketing.3.2.9 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 a galvanic cell between the dissimilar metals
20、ofthe pipe and jacket or by preventing crevice corrosion3.2.9.1 DiscussionA moisture retarder is not an insulationsystem water vapor retarder and does not perform the samefunction.3.2.10 polykrafta multilayer composite film used as amoisture retarder on metal jacketing consisting of at least onelaye
21、r 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 polyfilma multilayer film used as a moisture re-tarder on metal jacketing consisting of at least one layer ofethylene/methacrylic acid copolymer and one or more layers
22、ofother polymers, usually polyethylene.3.2.12 safety edgean edge of metal jacketing that hasbeen de-burred or rounded by a rolling operation3.2.13 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
23、.13.1 DiscussionThe fold is typically made toward theunderside of the jacketing so that the original edge is hiddenand the external appearance of the jacketing is preserved.3.2.14 splice rollmetal jacketing sold in roll form wherethe package contains two separate pieces of metal jacketingrolled appr
24、oximately 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 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 p
25、hysicalproperty requirements that address the prerequisites in Sections6 to 10. The designer of an insulation system, after determiningthe system requirements, shall use this specification to specifythe appropriate aluminum jacketing.5. Classification5.1 Classification of aluminum jacketing is based
26、 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 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
27、 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 Alloy and Temper per Specification B209:5.1.2.1 Grade 1 = Alloy 3105 or 3003, half hard temper(H14 or H24)5.1.2.2 Grade 2 = Alloy 3105 or 3003, quarter hard
28、 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 (alloy 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 =
29、 polyfilm, 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 2Class B was removed in 2011 because it was not used orproduced. The remaining Classes were not renumbered to avoid conflictswith engineering specifications tha
30、t reference the remaining Classes.6. Materials and Manufacture6.1 Aluminum jacketing materials are composed of a singlematerial or a lamination of several components. The materialsare supplied in the form of rolls or sheets or preformed to fit thesurface to which they are to be applied. The material
31、s 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. corrugated, or stucco embossed.The dimensions of corrugations (pitch and depth) must beagreed to by manufacturer and purchaser to ac
32、hieveinterchangeability, constant rigidity, and appearance.6.3 When agreed upon by purchaser and seller, aluminumsheets used as pipe insulation jacketing (see 8.2) shall have asafety edge or a38 to12 in. safety hem along one entire widthedge of the sheet. Aluminum jacketing with a safety edge orsafe
33、ty hem must still meet the length dimensions specified in8.2.1.Asafety hem shall not be specified when the finish is316in. corrugated.C1729 15a26.4 In most cases, the inner surface of aluminum jacketingmaterial is coated or covered with a moisture resistant film toretard possible galvanic or chemica
34、l corrosion, or both, of thejacketing.6.5 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.6.6 The aluminum used in this jacketing, with the excepti
35、onof box rib, shall be manufactured from Specification , alloys3003, 3105, or 1100 with tempers of H14 or H24 (half hard),H12 (quarter hard), 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 0.01
36、6to 0.050 in.NOTE 3The thickness values mentioned in 6.6, 6.8, and 6.7 arenominal thickness. The tolerances shown in Table 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 fo
37、r and discussion of jacketing thicknessand thickness tolerance in this document including Table 2 andTable 1 apply to the 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 alumi
38、num jacketing pieces shall be manufac-tured from Specification B209, alloys 3003 or 3105 (Grade 1),alloys 3004 or Alclad 3004 (Grades 4 and 5), or alloy 5052(Grade 6) per Section 5.1.2 and shall be 0.032 in., 0.040 in.,0.048 in., or 0.050 in. thick.NOTE 4Typical box rib widths available are 45-58 in
39、., 38.5 in., and27.5 in. Typical lengths available are 8, 10, and 12 ft. The pattern ofgrooves and ridges typically repeats on 4 in. centers and the height of eachrib is typically 1 in.6.10 Deep corrugated aluminum jacketing pieces shall be0.016 in., 0 .020 in., 0.024 in., 0.032 in., 0.040 in., or 0
40、.048 in.thick.6.10.1 Typical deep corrugated width is 33 in. and typicallength is 6 to 12 ft. Two nominal repeating patterns arecommon 1-14 in. on centers with a14 in. height and a 2-12 in.on centers with a58 in. height. For specific repeating patterndistances, the manufacturer shall be consulted.7.
41、 Physical Properties7.1 Required physical properties are shown in Table 2 andTable 3.NOTE 5See section 10.9 for further information regarding Table 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 opposi
42、te that contacting theinsulation) in accordance with 11.2.NOTE 6Aluminum jacketing is not typically considered a fire resistantmaterial. If a higher level of fire resistance or protection is required,alternative jacketing materials usually based on steel, should be consid-ered.7.3 Unless otherwise s
43、pecified 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 for a pigmented paint,7.3.3 Type III = 0.5 which is typical of an unpigmentedpaint, and7.3.
44、4 Type IV = 0.85 which is typical of a plastic filmsurface.NOTE 7Testing of the emittance of Type I has yielded initialunoxidized values ranging from 0.03 to 0.05 and oxidized “in-service”values ranging from 0.1 to 0.31 (2, 3, 4, 5, 6). The use of an emittance of0.1 is recommended here as being the
45、most conservative value. 7.3addresses the situation where a user of this standard wishes to consider adifferent emittance value.7.4 Permissible thickness tolerances vary with nominalthickness and are shown in Table 1. Thickness is measured per11.3.7.5 Requirements for permissible pinhole detections
46、in themoisture retarder when tested per Test Method C1785 areshown in Table 3.TABLE 1 Permissible Thickness TolerancesNominal thickness inin.Thickness tolerance in in. forUp to 39.4 in. wide jacketingand deep corrugated sheet48 in. wide jacketingand box rib sheetover 0.010 through 0.016 0.0010 0.001
47、5over 0.016 through 0.025 0.0015 0.0020over 0.025 through 0.032 0.0020 0.0025over 0.032 through 0.039 0.0020 0.0030over 0.039 through 0.047 0.0025 0.0035over 0.047 through 0.063 0.0030 0.0035TABLE 2 Minimum Thickness for Pipe JacketingMinimum Allowable Aluminum Thickness (in.)Outer InsulationDiamete
48、r (in.)RigidInsulationNon-RigidInsulation# 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 15a37.6 The moisture retarder shall have no visual defect thatwill affect performance and shall be free of laminatedseparations, h
49、oles, 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 shown inTable 3. Testing 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 When cut into sheets for use a
