1、Designation: C1729 12aC1729 12bStandard 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 numb
2、er 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 a
3、nd 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 f
4、or 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 ins
5、tallation of aluminum jacketing, see (1).21.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.5 This standard does not purport to add
6、ress all of 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 Specificat
7、ion for Aluminum 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 Tubin
8、gC835 Test Method 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 InsulationD3363 Test Method for Film Hardness by Pencil
9、TestE84 Test Method for Surface Burning Characteristics of Building MaterialsF1249 Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor2.2 ANSI Standard:4ANSI H35.2/H35.2(M) Dimensional Tolerances for Aluminum Mill Products3. Terminology3.
10、1 DefinitionsDefinitions in Terminology C168 apply to terms used in this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 box ribaluminum sheet formed to have alternating parallel grooves and ridges with a cross section approximating asquare wave1 This specification is under th
11、e jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.40 on InsulationSystems.Current edition approved March 1, 2012Nov. 1, 2012. Published June 2012January 2013. Originally approved in 2010. Last previous edition approved in 2012 asC172912.1
12、2aDOI:10.1520/C172912A.10.1520/C172912B.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 ASTM Standardsvolume inf
13、ormation, 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 user of an ASTM standa
14、rd 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 as published by ASTM
15、is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.2 claddingsynonymous with jacketing3.2.2.1 DiscussionThe three terms “jacketing”, “lagging”, and “cladding” are considered synonymous in mos
16、t 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.3.2.3 crevice corrosiona type of corrosion occurring on m
17、etal jacketing caused by differences in oxygen concentration in theelectrolyte in adjacent regions of the material. These differences lead to a concentration cell and the region on the metal jacketingwhich is oxygen-starved is subject to corrosion.3.2.4 cross crimpedsynonymous with 316 in. corrugate
18、d3.2.5 deep corrugatedaluminum sheet formed to have alternating parallel grooves and ridges with a cross sectionapproximating a sine wave3.2.6 finishthe texture of the aluminum surface3.2.7 gorejacketing for elbows, fittings, or other non-straight portions of the piping system made from a multitude
19、of similaroverlapping pieces3.2.8 laggingsynonymous with jacketing3.2.8.1 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 America the term “laggi
20、ng” has a different meaning than“jacketing” or “cladding” and refers specifically to a heavier gauge of jacketing.3.2.9 moisture retarder (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 formati
21、on of a galvanic cell between the dissimilar metals of the pipe and jacketor by preventing crevice corrosion.3.2.9.1 DiscussionA moisture retarder is not an insulation system water vapor retarder and does not perform the same function.3.2.10 polykraft a multilayer composite film used as a moisture r
22、etarder on metal jacketing consisting of at least one layerof minimum 40 lb kraft paper and one or more layers of plastic film, usually polyethylene 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 o
23、fethylene/methacrylic acid copolymer and one or more layers of other polymers, usually polyethylene.4. Significance and Use4.1 This specification is used to specify material by physical property requirements that address the prerequisites in Sections6 to 10. The designer of an insulation system, aft
24、er 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 ():5.1.1.1 Type I = Bare surface, = 0.15.1.1.2 Type II = P
25、ainted 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 Plastic film for Type IV must be factory applied and heat lami
26、nated 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,)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, andC1729
27、 12b25.1.2.5 Grade 5 =AlloyAlclad 3004 (alloy 3004 clad both sides with alloy 7072 for improved corrosion resistance). 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 = painte
28、d, and5.1.3.4 Class E = no moisture retarder.NOTE 1Class 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. Materials and Manufacture6.1 Aluminum jacketing mate
29、rials 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 factory-applied composite with the insulation.6.2 The
30、 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 rigidity, and appearance.6.3 In most cases, the i
31、nner surface of aluminum jacketing material is coated or covered with a moisture resistant film to retardpossible galvanic or chemical corrosion, or both, of the jacketing.6.4 For highly corrosive ambient conditions or to increase emittance, the purchaser shall specify that the outer surface of thea
32、luminum be coated with a pigmented or unpigmented paint or with a plastic film.6.5 The aluminum used in this jacketing, with the exception of box rib, shall be manufactured from Specification , alloys 3003,3105, or 1100 with tempers of H14 (half hard), H12 (quarter hard), or dead soft Grades 1, 2, o
33、r 3 per 5.1.2.6.6 Aluminum jacketing shall be specified by the thickness of the aluminum layer which shall be in the range from 0.016 to0.050 in. (0.41 to 1.27 mm)6.7 Box rib aluminum jacketing pieces shall be manufactured from Specification B209, alloys 3003 or 3105 (Grade 1) or 1),alloys 3004 orAl
34、clad 3004 (Grades 4 and 5) 5), or alloy 5052 (Grade 6) per Section 5.1.2 and shall be 0.032 in. (0.8 mm), 0.040in. (1.0 mm), 0.048 in. (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 availa
35、ble are 8, 10, and12 ft (2.4, 3.0, and 3.7 m). The pattern of grooves and ridges typically repeats on 4 in. (102 mm) centers and the height of each rib is typically 1 in. (25mm).6.8 Deep corrugated aluminum jacketing pieces shall be 0.016 in. (0.4 mm), 0 .020 in. (0.5 mm), 0.024 in. (0.6 mm), 0.032i
36、n. (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) and typical length is 6 to 12 ft (1.8 to 3.7 m). Two nominal repeatingpatterns are common 1-14 in. (32 mm) on centers with a 14 in. (6 mm) height and a 2-12 in. (64 mm) on centers with
37、 a 58 in.(16 mm) height. For specific repeating pattern distances, the manufacturer shall be consulted.7. Physical Properties7.1 Required physical properties are shown in Table 1 and Table 2.7.2 All aluminum jacketing shall demonstrate a flame spread of 25 or less and smoke developed of 50 or less w
38、hen testing theouter side (the side opposite that contacting the insulation) in accordance with 11.2.NOTE 3Aluminum 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,
39、should be considered.7.3 Unless otherwise specified 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,TABLE 1 Minimum Thickness for Pipe JacketingMinimum Allowable Aluminum Thickness (i
40、n.)Outer InsulationDiameter (in.)RigidInsulationNon-RigidInsulation# 8 0.016 0.016over 8 thru 11 0.016 0.020over 11 thru 24 0.016 0.024over 24 thru 36 0.020 0.032over 36 0.024 0.040C1729 12b37.3.2 Type II = 0.8 which is typical for a pigmented paint,7.3.3 Type III = 0.5 which is typical of an unpigm
41、ented paint, and7.3.4 Type IV = 0.85 which is typical of a plastic film surface.NOTE 4Testing 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 recomme
42、nded here as being 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 3. Thickness is measured per 11.3.7.5 Requirements for permi
43、ssible pinholes in the moisture retarder when tested per 11.4 are shown in Table 2.7.6 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 wa
44、ter vapor transmission rate (WVTR) of the moisture retarders tested per 11.6 are shown in Table 2.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 2 Physical Prope
45、rtiesType I II III IVGrade All All All AllClass A C D E A C D E A C D E A C D EEmittance 0.1 0.1 0.1 0.1 0.8 0.8 0.8 0.8 0.5 0.5 0.5 0.5 0.85 0.85 0.85 0.85SurfaceBurning(flame/smoke max)25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50 25/50Moistureretarderpi
46、nholes(per 50 ft2)#5 #5 #5 n.a. #5 #5 #5 n.a. #5 #5 #5 n.a. #5 #5 #5 n.a.MoistureretarderWVTR(g/100 in2/day)#0.1 #1.1 n.a. n.a. #0.1 #1.1 n.a. n.a. #0.1 #1.1 n.a. n.a. #0.1 #1.1 n.a. n.a.Outer PaintThickness(mils)n.a. n.a. n.a. n.a. 0.7-0.8 0.7-0.8 0.7-0.8 0.7-0.8 0.3-0.4 0.3-0.4 0.3-0.4 0.3-0.4 n.a
47、. n.a. n.a. n.a.Outer PaintPencilHardness(min)n.a. n.a. n.a n.a. H H H H H H H H n.a n.a n.a. n.a.TABLE 3 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 ri
48、b sheetover 0.010 thru 0.016(over 0.254 thru 0.406) 0.0010 (0.0254) 0.0015 (0.0381)over 0.016 thru 0.025(over 0.406 thru 0.635) 0.0015 (0.0381) 0.0020 (0.0508)over 0.025 thru 0.032(over 0.635 thru 0.813) 0.0020 (0.0508) 0.0025 (0.0635)over 0.032 thru 0.039(over 0.813 thru 0.991) 0.0020 (0.0508) 0.00
49、30 (0.0762)over 0.039 thru 0.047(over 0.991 thru 1.194) 0.0025 (0.0635) 0.0035 (0.0889)over 0.047 thru 0.063(over 1.194 thru 1.600) 0.0030 (0.0762) 0.0035 (0.0889)C1729 12b48. Dimensions and Permissible Variations8.1 Dimensions for aluminum jacketing shall be as agreed to by purchaser and seller.8.2 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 called the length and the other major dimension shall
