1、Designation: C1729 16Standard 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 pare
2、ntheses 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 bot
3、h 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 co
6、ncerns, 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 A
7、luminum-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 Tot
8、al 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 Met
9、hod 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 Mod
10、ulatedInfrared 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 to
11、 have alternatingparallel grooves and ridges with a cross section approximatinga square wave.3.2.2 cladding (as related to insulation jacketing)synonymous with jacketing.3.2.2.1 DiscussionThe three terms “jacketing,” “lagging,”and “cladding” are considered synonymous in most metaljacket related appl
12、ications 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 March 1, 2016.
13、 Published March 2016. Originallyapproved in 2010. Last previous edition approved in 2015 as C1729 15a. DOI:10.1520/C1729-16.2The 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 A
14、STM 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
15、International, 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 i
16、mmediately 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. corrugated.3.2.5 deep corrugatedaluminum sheet formed to havealternating parallel grooves and
17、 ridges with a cross sectionapproximating a sine wave.3.2.6 finishthe texture of the aluminum surface.3.2.7 gorejacketing for elbows, fittings, or other non-straight portions of the piping system made from a multitude ofsimilar overlapping pieces.3.2.8 lagging (as related to insulation jacketing)syn
18、onymous with jacketing.3.2.8.1 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” o
19、r “clad-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 m
20、etals ofthe pipe and jacket or by preventing crevice corrosion.3.2.9.1 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
21、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 polyfilmin relation to metal jacketing, a three-layerfilm used as a moisture retarder on metal jacketing consistingof one layer of ethylene/methacrylic acid copo
22、lymer and twolayers of other polymers, usually polyethylene.3.2.12 safety edgean edge of metal jacketing that has beende-burred or rounded by a rolling operation.3.2.13 safety hema rounded edge of metal jacketing cre-ated by folding the edge of sheet jacketing completely backupon itself using a roll
23、 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 of the jacketing is preserved.3.2.14 splice rollmetal jacketing sold in roll form wherethe package contains two separate pieces of meta
24、l 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 required roll length is obtained.3.2.15 split rollsynonymous with splice roll.4. Significance and Use4.1 This specification is used to
25、 specify material by physicalproperty 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 alumi
26、num 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 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 P
27、aint 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 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
28、 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 (alloy 3004 clad bothsides with alloy 7072 for improved corrosion resistance), and5.1.2.6 Grade 6 = Alloy 5052.5.1.3 Moisture Reta
29、rder:5.1.3.1 Class A = 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 engineer
30、ing 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. The materialsare supplied in the form of rolls or sheets or preformed to fit thesurface to which they are to be
31、 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. corrugated, or stucco embossed.The dimensions of corrugations (pitch and depth) must beagreed to by manufactur
32、er and purchaser to achieveinterchangeability, 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 wit
33、h a safety edge orsafety hem must still meet the length dimensions specified in8.2.1.Asafety hem shall not be specified when the finish is316in. corrugated.C1729 1626.4 In most cases, the inner surface of aluminum jacketingmaterial is coated or covered with a moisture resistant film toretard possibl
34、e galvanic or chemical corrosion, or both, of thejacketing.6.5 Polyfilm (Class A) and polykraft (Class C) must befactory applied and heat laminated to the interior surface of themetal jacketing.6.6 For highly corrosive ambient conditions or to increaseemittance, the purchaser shall specify that the
35、outer surface ofthe aluminum be coated with a pigmented or unpigmentedpaint or with a plastic film.6.7 The aluminum used in this jacketing, with the exceptionof box rib, shall be manufactured from Specification , alloys3003, 3105, or 1100 with tempers of H14 or H24 (half hard),H12 (quarter hard), or
36、 dead soft Grades 1, 2, or 3 per 5.1.2.6.8 Aluminum jacketing shall be specified by the thicknessof the aluminum layer which shall be in the range from 0.016to 0.050 in.NOTE 3The thickness values mentioned in 6.7, 6.9, and 6.8 arenominal thickness. The tolerances shown in Table 1 apply to these list
37、ednominal values.6.9 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 the base metal before any
38、forming or rollingand do not include any coatings or films that are applied to thesurface such as the moisture barriers described in 5.1.3.6.10 Box rib aluminum jacketing pieces shall be manufac-tured from Specification B209, alloys 3003 or 3105 (Grade 1),alloys 3004 or Alclad 3004 (Grades 4 and 5),
39、 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., 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 an
40、d the height of eachrib is typically 1 in.6.11 Deep corrugated aluminum jacketing pieces shall be0.016 in., 0 .020 in., 0.024 in., 0.032 in., 0.040 in., or 0.048 in.thick.6.11.1 Typical deep corrugated width is 33 in. and typicallength is 6 to 12 ft. Two nominal repeating patterns arecommon 1-14 in.
41、 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. Physical Properties7.1 Required physical properties are shown in Table 2 andTable 3.NOTE 5See section 10.9 for further information regarding T
42、able 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 6Aluminum jacketing is not typically considered a fire resistantmaterial. If a h
43、igher level of fire resistance or protection is required,alternative 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 oxidiz
44、edaluminum 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 7Testing of the emittance of Type I has yielded initialunoxidized values rangin
45、g 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 most conservative value. 7.3addresses the situation where a user of this standard wishes to consider adifferent emittance value.7.4 Permissible
46、 thickness tolerances vary with nominalthickness and are shown in Table 1. Thickness is measured per11.3.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
47、 through 0.016 0.0010 0.0015over 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 (
48、in.)Outer InsulationDiameter (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 1637.5 Requirements for permissible pinhole detections in themoisture retarder when tested per Test Met
49、hod C1785 areshown 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 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.
