ASTM C1729-2012c Standard Specification for Aluminum Jacketing for Insulation《绝缘铝护套的标准规格》.pdf

1、Designation: C1729 12bC1729 12cStandard 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 Nov. 1, 2012Dec. 1, 2012. Published January 2013. Originally approved in 2010. Last previous edition approved in 2012 as C172912a12bDOI:10.

12、1520/C172912B.10.1520/C172912C.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 information,

13、 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 standard an ind

14、ication 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 is to be

15、considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.2 claddingcladding (as related to insulation jacketing)synonymous with jacketing3.2.2.1 DiscussionThe three terms “jacketing”, “lagging”, and “claddi

16、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.3.2.3 crevice corrosi

17、ona type of corrosion occurring on metal 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 crim

18、pedsynonymous 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 aluminum surface3.2.7 gorejacketing for elbows, fittings, or other non-straight portions of the

19、piping system made from a multitude of similaroverlapping pieces3.2.8 lagginglagging (as related to insulation jacketing)synonymous with jacketing3.2.8.1 DiscussionThe three terms “jacketing”, “lagging”, and “cladding” are considered synonymous in most metal jacket related applications andgeographie

20、s. 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 retarder (moister barrier)a layer of plastic film or other material applied to the inner si

21、de 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 corrosion.corrosion3.2.9.1 DiscussionA moisture retarder is not an insulation system water vapor retarder and does not pe

22、rform the same function.3.2.10 polykraft polykrafta multilayer composite film used as a moisture retarder on metal jacketing consisting of at leastone layer of minimum 40 lb kraft paper and one or more layers of plastic film, usually polyethylene at a minimum thickness of1.5 mils.3.2.11 polysurlyna

23、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 splice rollmetal jacketing sold in roll form where the package contains two separate pieces of m

24、etal jacketing rolledapproximately end to end.3.2.12.1 DiscussionA splice roll occurs when the metal coil being used to form the roll jacketing reaches its end before the required roll length isobtained.3.2.13 split rollsynonymous with splice roll.4. Significance and Use4.1 This specification is use

25、d to specify material by physical property requirements that address the prerequisites in Sections6 to 103.2.13. The designer of an insulation system, after determining the system requirements, shall use this specification tospecify the appropriate aluminum jacketing.5. Classification5.1 Classificat

26、ion of aluminum jacketing is based on three factors:5.1.1 Outer surface treatment and emittance ():5.1.1.1 Type I = Bare surface, = 0.10.1,5.1.1.2 Type II = Painted with pigmented paint, = 0.8,5.1.1.3 Type III = Painted with unpigmented paint, = 0.5, andC1729 12c25.1.1.4 Type IV = Plastic film coate

27、d 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 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,)5.1.

28、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 (alloy 3004 clad both sides with alloy 7072 for improved corrosion resistance), and5.1.2.6 Grade 6 = Allo

29、y 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 Class E = no moisture retarder.NOTE 1Class B was removed in 2011 because it was not used or produced. The remaining Classes were not renumbere

30、d to avoid conflicts withengineering specifications that reference the remaining Classes.6. Materials 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

31、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 primary material shall be aluminum and shall have a finish that is smooth, 316 in. corrugated, or stucco embossed. Thedimensions of corrugations (pitch and

32、 depth) must be agreed to by manufacturer and purchaser to achieve interchangeability,constant rigidity, and appearance.6.3 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, o

33、f the jacketing.6.4 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.6.5 The aluminum used in this jacketing, with the exception of box rib, shall

34、 be manufactured from Specification , alloys 3003,3105, or 1100 with tempers of H14 (half hard), H12 (quarter hard), or dead soft Grades 1, 2, or 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

35、.27 mm)mm).6.7 Box rib aluminum jacketing 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. (0.8 mm), 0.040 in. (1.0mm), 0.048 in. (1.2 mm), or 0.050 in (1.

36、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 available 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 typic

37、ally 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), 0.032in. (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

38、 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 a 58 in.(16 mm) height. For specific repeating pattern distances, the manufacturer shall be consulted.7. Physical Properties7.1 Required physical properties ar

39、e 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 when testing theouter side (the side opposite that contacting the insulation) in accordance with 11.2.NOTE 3Aluminum jacketing is not typically considered a fire

40、 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 specified by the manufacturer, the emittance of the jacketing shall be considered to be:7.3.1 Type I = 0.1 which is ty

41、pical 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, andC1729 12c37.3.4 Type IV = 0.85 which is typical of a plastic film surface.NOTE 4Testing of the emittance of Type I has

42、 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 the most conservative value. 7.3 addresses the situationwhere a user of this standard wishes to consider

43、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 permissible pinholes in the moisture retarder when tested per 11.4 are shown in Table 2.7.6 The moisture retarder shall have no v

44、isual 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 water vapor transmission rate (WVTR) of the moisture retarders tested per 11.6 are shown in Table 2.Testing the WVTR of moistu

45、re retarders is not possible after they are applied to the aluminum jacketing so this testing shall bedone on the moisture retarders prior to application.8. Dimensions and Permissible Variations8.1 Dimensions for aluminum jacketing shall be as agreed to by purchaser and seller.8.2 When cut into shee

46、ts 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 be identified as thewidth.8.2.1 The length shall be a minimum of the outer circumference of t

47、he insulation plus 2 in. (51 mm) for insulation outer diameter 20 in. (508 mm) and a minimum of the outer circumference of the insulation plus 2.5 in. (64 mm) for insulation outer diameter 20 in. (508 mm).8.2.2 Typical width is 36 in. (0.91 m), 48 in. (1.22 m), or 1 meter (39.4 in.).8.2.3 Dimensions

48、 differing from these standards are possible but must be agreed to by purchaser and seller.8.2.4 Tolerances for aluminum jacketing sheets shall be 6 18 in. (6 3mm) in width and length.8.3 When cut into sheets for use as equipment and vessel insulation jacketing, the longer dimension of the box rib o

49、r corrugatedaluminum jacketing sheet shall be called the length and the other (shorter) major dimension shall be identified as the width.8.3.1 Typical width of deep corrugated aluminum sheet is 33 in. (838 mm).8.3.2 Typical lengths of deep corrugated aluminum sheet are 6 to 12 ft (1.8 to 3.7 m).8.3.3 Typical widths of box rib aluminum sheet are 45-58 in. (1159 mm), 38.5 in. (978 mm), and 27.5 in. (699 mm).8.3.4 Typical lengths of box rib aluminum sheet are 8, 10, and 12 ft (2.4, 3.0, and 3.7 m)8.3.5 Dimensions differing from