ASTM C1729-2014a Standard Specification for Aluminum Jacketing for Insulation《铝绝缘护套的标准规格》.pdf

1、Designation: C1729 14C1729 14aStandard 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 numbe

2、r in parentheses 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 thermal and acoustical insulation operating at either above or belowambient temperatures an

3、d in both indoor and outdoor locations. It does not cover insulation jacketing made from other materialssuch as mastics, fiber reinforced plastic, PVC, or stainless steel nor does it cover the details of thermal or acoustical insulationsystems.1.2 This specification provides physical requirements fo

4、r aluminum jacketing for thermal and acoustical insulation. GuideC1423 provides guidance in selecting jacketing materials and their safe use.1.3 This is a material specification and does not imply any performance of the installed system using the materials specifiedherein. For information about inst

5、allation of aluminum jacketing, see (1).21.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in thisstandard.NOTE 1A version of this specification in SI units is available as C1729M.1.5 This standard does not purport to address all of

6、the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:3B209 Specification for Alum

7、inum and Aluminum-Alloy Sheet and PlateC168 Terminology Relating to Thermal InsulationC450 Practice for Fabrication of Thermal Insulating Fitting Covers for NPS Piping, and Vessel LaggingC585 Practice for Inner and Outer Diameters of Thermal Insulation for Nominal Sizes of Pipe and TubingC835 Test M

8、ethod for Total Hemispherical Emittance of Surfaces up to 1400CC1371 Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable EmissometersC1423 Guide for Selecting Jacketing Materials for Thermal InsulationC1729M Specification for Aluminum Jacketing for Insulation

9、C1785 Test Method for Concentration of Pinhole Detections in Moisture Barriers on Metal JacketingD3363 Test Method for Film Hardness by Pencil TestE84 Test Method for Surface Burning Characteristics of Building MaterialsF1249 Test Method for Water Vapor Transmission Rate Through Plastic Film and She

10、eting Using a Modulated Infrared Sensor2.2 ANSI Standard:4ANSI H35.2/H35.2(M) Dimensional Tolerances for Aluminum Mill Products3. Terminology3.1 DefinitionsDefinitions in Terminology C168 apply to terms used in this specification.3.2 Definitions of Terms Specific to This Standard:1 This specificatio

11、n is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.40 on InsulationSystems.Current edition approved April 1, 2014Sept. 1, 2014. Published April 2014October 2014. Originally approved in 2010. Last previous edition approved in 2

12、0132014 asC172913a.14. DOI: 10.1520/C172914.10.1520/C172914A.2 The boldface numbers in parentheses refer to a list of references at the end of this standard.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of AST

13、M Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the u

14、ser of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard

15、as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.1 box ribaluminum sheet formed to have alternating parallel grooves and ridges with a cross section approximating asqua

16、re 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 metal jacket related applications andgeographies. However, in some cases in the power industry in North Americ

17、a the term “lagging” has a different meaning than“jacketing” or “cladding” and refers specifically to a heavier gauge of jacketing.3.2.3 crevice corrosionLocalized corrosion of metal jacketing surface at, or immediately adjacent to, an area that is shieldedfrom full exposure to the environment becau

18、se of close proximity between the metal and the surface of another material.3.2.4 cross crimpedsynonymous with 316 in. corrugated3.2.5 deep corrugatedaluminum sheet formed to have alternating parallel grooves and ridges with a cross sectionapproximating a sine wave3.2.6 finishthe texture of the alum

19、inum surface3.2.7 gorejacketing for elbows, fittings, or other non-straight portions of the piping system made from a multitude of similaroverlapping pieces3.2.8 lagging (as related to insulation jacketing)synonymous with jacketing3.2.8.1 DiscussionThe three terms “jacketing”, “lagging”, and “claddi

20、ng” are considered synonymous in most metal jacket related applications andgeographies. However, in some cases in the power industry in North America the term “lagging” has a different meaning than“jacketing” or “cladding” and refers specifically to a heavier gauge of jacketing.3.2.9 moisture retard

21、er (moister barrier)a layer of plastic film or other material applied to the inner side of metal jacketingto inhibit jacket corrosion by interfering with the formation of a galvanic cell between the dissimilar metals of the pipe and jacketor by preventing crevice corrosion3.2.9.1 DiscussionA moistur

22、e retarder is not an insulation system water vapor retarder and does not perform the same function.3.2.10 polykrafta multilayer composite film used as a moisture retarder on metal jacketing consisting of at least one layerof minimum 40 lb kraft paper and one or more layers of plastic film, usually p

23、olyethylene at a minimum thickness of 1.5 mils.3.2.11 polysurlyna multilayer film used as a moisture retarder on metal jacketing consisting of at least one layer ofethylene/methacrylic acid copolymer and one or more layers of other polymers, usually polyethylene.3.2.12 safety edgean edge of metal ja

24、cketing that has been de-burred or rounded by a rolling operation3.2.13 safety hema rounded edge of metal jacketing created by folding the edge of sheet jacketing completely back upon itselfusing a roll former or a brake.3.2.13.1 DiscussionThe fold is typically made toward the underside of the jacke

25、ting so that the original edge is hidden and the external appearanceof the jacketing is preserved.3.2.14 splice rollmetal jacketing sold in roll form where the package contains two separate pieces of metal jacketing rolledapproximately end to end.3.2.14.1 DiscussionA splice roll occurs when the meta

26、l coil being used to form the roll jacketing reaches its end before the required roll length isobtained.3.2.15 split rollsynonymous with splice roll.C1729 14a24. Significance and Use4.1 This specification is used to specify material by physical property requirements that address the prerequisites in

27、 Sections6 to 10. The designer of an insulation system, after determining the system requirements, shall use this specification to specify theappropriate aluminum jacketing.5. Classification5.1 Classification of aluminum jacketing is based on three factors:5.1.1 Outer surface treatment and emittance

28、 ():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 II and III must be factory applied and baked on.5.1.1.6 Pl

29、astic film for Type IV must be factory applied and heat 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,)(H14 or H24)5.1.2.2 Grade 2 = Alloy 3105 or 3003, quarter hard temper (H12 - lock forming quality),5.1.2.3 Grade

30、 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 both sides 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 = polyk

31、raft per section 3.2.10,5.1.3.3 Class D = painted, and5.1.3.4 Class E = no moisture retarder.NOTE 2Class B was removed in 2011 because it was not used or produced. The remaining Classes were not renumbered to avoid conflicts withengineering specifications that reference the remaining Classes.6. Mate

32、rials and Manufacture6.1 Aluminum jacketing materials are composed of a single material or a lamination of several components. The materials aresupplied in the form of rolls or sheets or preformed to fit the surface to which they are to be applied. The materials are appliedin the field or as a facto

33、ry-applied composite with the insulation.6.2 The primary material shall be aluminum and shall have a finish that is smooth, 316 in. corrugated, or stucco embossed. Thedimensions of corrugations (pitch and depth) must be agreed to by manufacturer and purchaser to achieve interchangeability,constant r

34、igidity, and appearance.6.3 When agreed upon by purchaser and seller, aluminum sheets used as pipe insulation jacketing (see 8.2) shall have a safetyedge or a 38 to 12 in. safety hem along one entire width edge of the sheet. Aluminum jacketing with a safety edge or safety hemmust still meet the leng

35、th dimensions specified in 8.2.1. A safety hem shall not be specified when the finish is 316 in. corrugated.6.4 In most cases, the inner surface of aluminum jacketing material is coated or covered with a moisture resistant film to retardpossible galvanic or chemical corrosion, or both, of the jacket

36、ing.6.5 For highly corrosive ambient conditions or to increase emittance, the purchaser shall specify that the outer surface of thealuminum be coated with a pigmented or unpigmented paint or with a plastic film.6.6 The aluminum used in this jacketing, with the exception of box rib, shall be manufact

37、ured from Specification , alloys 3003,3105, 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 thickness of the aluminum layer which shall be in the range from 0.016 to0.050 in.NOTE 3The thickn

38、ess values mentioned in 6.6, 6.8, and 6.7 are nominal thickness. The tolerances shown in Table 1 apply to these listed nominalvalues.6.8 The measured thickness of metal jacketing will be influenced by any forming or rolling such as that described in 10.5. Allrequirements for and discussion of jacket

39、ing thickness and thickness tolerance in this document including Table 2 and Table 1apply to the base metal before any forming or rolling and do not include any coatings or films that are applied to the surface suchas the moisture barriers described in 5.1.3.C1729 14a36.9 Box rib aluminum jacketing

40、pieces shall be manufactured from Specification B209, alloys 3003 or 3105 (Grade 1), alloys3004 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., or0.050 in. thick.NOTE 4Typical box rib widths available are 45-58 in., 38.5 in., a

41、nd 27.5 in. Typical lengths available are 8, 10, and 12 ft. The pattern of groovesand ridges typically repeats on 4 in. centers and the height of each rib is typically 1 in.6.10 Deep corrugated aluminum jacketing pieces shall be 0.016 in., 0 .020 in., 0.024 in., 0.032 in., 0.040 in., or 0.048 in. th

42、ick.6.10.1 Typical deep corrugated width is 33 in. and typical length is 6 to 12 ft. Two nominal repeating patterns are common 1-14 in. on centers with a 14 in. height and a 2-12 in. on centers with a 58 in. height. For specific repeating pattern distances, themanufacturer shall be consulted.7. Phys

43、ical Properties7.1 Required physical properties are shown in Table 2 and Table 3.NOTE 5See section 10.9 for further information regarding Table 2.7.2 All aluminum jacketing shall demonstrate a flame spread of 25 or less and smoke developed of 50 or less when testing theouter side (the side opposite

44、that contacting the insulation) in accordance with 11.2.NOTE 6Aluminum jacketing is not typically considered a fire resistant material. If a higher level of fire resistance or protection is required, alternativejacketing materials usually based on steel, should be considered.7.3 Unless otherwise spe

45、cified by the manufacturer, the emittance of the jacketing shall be considered to be:7.3.1 Type I = 0.1 which is typical for a normally oxidized aluminum 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 unpigmented paint, and7.3

46、.4 Type IV = 0.85 which is typical of a plastic film surface.NOTE 7Testing of the emittance of Type I has yielded initial unoxidized values ranging from 0.03 to 0.05 and oxidized “in-service” values rangingfrom 0.1 to 0.31 (2, 3, 4, 5, 6). The use of an emittance of 0.1 is recommended here as being

47、the most conservative value. 7.3 addresses the situationwhere a user of this standard wishes to consider a different emittance value.7.4 Permissible thickness tolerances vary with nominal thickness and are shown in Table 1. Thickness is measured per 11.3.7.5 Requirements for permissible pinhole dete

48、ctions in the moisture retarder when tested per Test Method C1785 are shown inTable 3.7.6 The moisture retarder shall have no visual defect that will affect performance and shall be free of laminated separations,holes, rips, tears, scratches, dents, non-uniform edges, or creases.7.7 Requirements for

49、 water vapor transmission rate (WVTR) of the moisture retarders tested per 11.6 are shown in Table 3.Testing the WVTR of moisture retarders is not possible after they are applied to the aluminum jacketing so this testing shall bedone on the moisture retarders prior to application.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 0.0015over 0.016 through 0.025