1、Designation: C1809 15C1809 16Standard Practice forPreparation of Specimens and Reporting of Results forPermeance Testing of Pressure Sensitive Adhesive SealedJoints in Insulation Vapor Retarders1This standard is issued under the fixed designation C1809; the number immediately following the designati
2、on indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice provides instruction
3、for the preparation of test specimens of pressure sensitive adhesive (psa) sealed joints ofthe type employed in insulation vapor retarder systems, for subsequent testing per Test Methods E96/E96M to determine the watervapor permeance (“permeance”) of those joints. It does not cover preparation of ot
4、her types of joints.1.2 This practice also provides requirements for the content of reports issued in conjunction with Test Methods E96/E96Mtesting of these joints.1.3 Joints are made with factory coated psa tapes or psa coated laminate jacket (vapor retarder cladding) materials.1.3.1 The types of m
5、aterials and joints to be tested are generally encountered in mechanical systems in commercial andindustrial insulation applications, and in HVAC systems insulation.1.3.2 Typical psa joints that are employed in vapor retarder systems for mechanical insulation include:1.3.2.1 Overlap with double-side
6、d tape.1.3.2.2 Overlap with coated laminate jacket.1.3.2.3 Butt with single-sided insulation tape.1.3.2.4 Intersection of overlap and butt joint.1.4 Test Methods E96/E96M is to be followed for specific testing instruction beyond the areas of guidance provided herein, thatis, after the specimens are
7、prepared in the desired test configuration.1.5 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.1.6 This standard does not purport to ad
8、dress 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:2C1775 Specific
9、ation for Laminate Protective Jacket and Tape for Use over Thermal Insulation for Outdoor ApplicationsE96/E96M Test Methods for Water Vapor Transmission of MaterialsC168 Terminology Relating to Thermal Insulation3. Terminology3.1 Definitions:3.1.1 laminate jacketsee Specification C1775.3.1.2 water v
10、apor permeance, water vapor barriersee Terminology C168.3.2 Definitions of Terms Specific to This Standard:1 This practice is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.40 on Insulation Systems.Current edition approved Apri
11、l 15, 2015March 1, 2016. Published May 2015April 2016. Originally approved in 2015. Last previous edition approved in 2015 asC1809 15. DOI: 10.1520/C18091510.1520/C1809-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Ann
12、ual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be
13、 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 considered the official document.Copyright ASTM International, 100 Barr Harbor Drive
14、, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.1 pressure sensitive adhesive, nan adhesive that requires some degree of pressure, and only pressure, to adequately bondto a substrate.3.2.2 SSL tape, nA pressure sensitive, double-sided “Self Sealing Lap” tape that is commonly used
15、to seal the longitudinaloverlap joint in pipe insulation jacketing.4. Summary of Practice4.1 Specimen preparation as directed herein addresses configuration and sealing of psa joints for subsequent permeance testing.4.2 The permeance test itself is performed per Test Methods E96/E96M.5. Significance
16、 and Use5.1 PSA joints are a necessary and critical component of an insulation vapor retarder system and, in addition to knowing thepermeance of the vapor retarder being used, assessing the permeance of the joints is necessary to indicate the expected performanceof the system.5.2 Test Methods E96/E9
17、6M does not include instructions specific to preparing multiple-piece assemblies such as psa joints.This practice provides those instructions.5.3 There are a number of variables involved in making a psa joint, and those need to be considered in specimen preparationand data reporting. Such variables
18、include:5.3.1 Means of applying pressure to seal the joint,5.3.2 Amount of pressure applied,5.3.3 Dwell time prior to test,5.3.4 Backing surface upon which joint is prepared,5.3.5 Ambient conditions for specimen preparation,5.3.6 Dimensions of materials,5.3.7 Configuration of joint,5.3.8 Dish size,5
19、.3.9 Test area of specimen, and5.3.10 Area of joint.5.4 It is not likely that field-installed joints will achieve as good a seal as those prepared in the laboratory. Field installationscan involve extremes in ambient conditions, surface contamination, limited space, varying pipe radii, varying press
20、ure applied, andvariation in base insulation density and rigidity.5.4.1 Results obtained through application of this practice and Test Methods E96/E96M are best used to compare materials andconfigurations. It is urged not to equate actual field performance with the results obtained in a laboratory s
21、etting.6. Procedure6.1 Use an aluminum test dish with nominal outside diameter of 6 in. (152 mm) and specimen template with nominal outsidediameter of 5.75 in. (146 mm).6.2 Use a wax damming plate that produces an exposed specimen test surface diameter of 5.25 in. (133.5 mm).6.3 Prepare specimens on
22、 a flat, smooth, hard and rigid surface, such as laboratory bench top, under standard conditions of 73,6 2F (23, 6 0.7C) and 50 6 5% RH.6.4 For butt joints, position the tape centered over two adjacent sheets of vapor retarder (see Fig. 1).Butt Joints:6.4.1 Position the tape centered over two adjace
23、nt sheets of vapor retarder (see Fig. 1).6.4.2 Separate the two sheets by a gap of 0.5 inchin. (12 mm) to duplicate a nominal field installation gap.gap, centered in thedish.6.4.3 Apply a 3 in. (76mm) (76 mm) wide tape, centered over the gap.6.5 For overlap Self-Seal Laps (SSL), or for overlap cladd
24、ing joints, position the tape and vapor retarder sheets, or claddingsheets, so that there is a 1 inch (25 mm) overlap (see Fig. 2). Self-Sealing Overlap Joints:6.5.1 Position the tape and vapor retarder sheets, or cladding sheets, so that there is a 1 in. (25 mm) overlap (see Fig. 2).6.5.2 Center th
25、e exposed edge in the dish.6.6 For combination butt and lap joints (as with pipe insulation), first prepare a sheet with the lap joint then cut it in half,perpendicular to the joint. Make a butt joint per 6.3 with the two resulting sheets. Overlap Seams with Single-Sided Tape Covering:6.6.1 Overlap
26、the vapor retarder by 1 in. (25 mm) with exposed lap edge centered in dish.6.6.2 Center a 3 in. (75 mm) single-sided tape over the exposed lap edge (see Fig. 3).6.7 In all cases, make the vapor retarder sheet somewhat larger than the test specimen dimensions, then trim to correct size aftermaking jo
27、int(s).C1809 162FIG. 1 Butt Joint Seam with a 3 in. Single-sided Tape CoveringFIG. 2 1 in. Overlap Seam with Double-Sided Tape (SSL), or PSA Coated CladdingC1809 1636.8 To seal the joint, use a 4 in. (102 mm) wide plastic tape applicator squeegee, available from insulation tape suppliers.6.8.1 Apply
28、 a manual force of nominally 5 lbs. (2.3 kg) when rubbing the joint with the squeegee.6.8.1.1 Practice exerting this force by applying the rubbing motion on a flat digital scale of 10-20 lb. (4.5-9.0 kg) capacity.6.8.2 Rub down the joint using two passes in one direction only.6.9 Do not apply additi
29、onal force or passes to any parts of the joint.6.10 If one surface of the vapor retarder or tape is hygroscopic (such as standard ASJ with exposed paper), test withnon-hygroscopic side up. (In this case the joint is “upside down”, but this should not affect moisture ingress.)7. Test Methods7.1 Test
30、Methods E96/E96M is to be used, employing a wax/resin seal.7.2 Test the vapor retarder material by itself (without joints) to establish its permeance.7.3 Test the specimens with joints.NOTE 1Per Test Methods E96/E96M, for a given configuration, three or four specimens, plus a dummy specimen, are tes
31、ted.7.4 Any test chamber conditions may be employed. The following are either commonly used, or may be appropriate forexpected end use conditions or specification requirements:7.4.1 Test Methods E96/E96M Procedure A, desiccant method at 73F (23C).7.4.2 Test Methods E96/E96M Procedure B, water method
32、 at 73F (23C).7.4.3 Test Methods E96/E96M Procedure E, desiccant method at 100F (38C).8. Calculation of Result8.1 Permeance of the psa joint is based on the area of the joint.8.2 The permeance of the vapor retarder must be known.8.3 Calculate the permeance attributable to the psa joint alone as foll
33、ows:FIG. 3 Overlap Seam with 3 in. Single-Sided Tape CoveringC1809 164Pj 5As Ps! 2Av Pv#Aj (1)Pj 5 As Ps! 2 Av Pv!# Aj (1)As = Area of full test specimenPs = Permeance of full test specimenAv = Area vapor retarder only (area not covered by joint)Pv = Permeance of vapor retarder (known)Aj = Area of p
34、sa joint (total area of specimen minus the area of two vapor retarder-only segments)Pj = Permeance of psa joint in test, at the tested widthKnown values:Area of full test specimen: 21.65 in2Area of vapor retarder only, for butt joint: 6.80 in2Area of joint, butt: 14.85 in2Area of vapor retarder only
35、, for overlap joint: 16.53 in2Area of joint, overlap: 5.12 in2NOTE 2See Appendix X2 for further discussion of calculation.8.4 Known Values:8.4.1 Area of full test specimen: 21.65 in.2.8.4.2 Area of vapor retarder only, for butt joint: 6.80 in.2.8.4.3 Area of joint, butt: 14.85 in.2.8.4.4 Area of vap
36、or retarder only, for self-sealing overlap joint: 16.53 in.2.8.4.5 Area of joint, self-sealing overlap: 5.12 in.2.8.4.6 Area of vapor retarder only, for overlap with single-sided tape covering: 6.80 in.2.8.4.7 Area of joint, overlap with single-sided tape covering: 14.85 in.2.NOTE 2See Appendix X2 f
37、or further discussion of calculation.9. Report9.1 The following information, at a minimum, is to be included in the test report:9.1.1 Vapor retarder identification,9.1.2 Tape or laminate jacketing identification,9.1.3 Test conditions,9.1.4 Type of joint, and9.1.5 Calculated permeance of psa joint, a
38、t stated tested width.10. Keywords10.1 butt joint; insulation tape; laminate jacketing; overlap joint; permeance; pressure sensitive; SSL; vapor retarder systemANNEX(Mandatory Information)A1. GEOMETRY AND DIMENSIONS OF TEST SPECIMENSA1.1 When testing a singular material per Test Methods E96/E96M, th
39、e size and shape of the exposed specimen surface is of noimpact; only the area need be known.A1.2 In order to obtain standard performance values for the joints in this test, it is necessary to establish standard geometry anddimensions for the specimens.A1.3 Varying the overall size of the specimen,
40、the width of the joint, or its location in the test dish (if round) will impact the resultobtained.A1.4 Given the above, these parameters have been standardized for the purposes of laboratory testing and reporting results forpressure sensitive joints.C1809 165APPENDIXES(Nonmandatory Information)X1.
41、DISCUSSION OF CALCULATION AND REPORTING OF PERMEANCE FOR THE TESTED JOINTX1.1 The permeance calculation uses the area of the joint- that area made up of the pressure sensitive adhesive and the materialto which it is originally applied (coated).X1.2 When using a circular test dish, the area of the jo
42、int is found by subtracting the area of the two segments that contain thevapor retarder only from the total specimen area.X1.2.1 To calculate the area of the vapor retarder only in a circular test dish, (two segments) and of the joint, two values mustbe known: (1) radius of exposed specimen area, an
43、d (2) distance from joint edge to edge of specimen (for both segments),measured perpendicularly from the midpoint of the tape edge.X1.2.2 These areas are easily determined by the specimen diameter and joint width dimensions specified in the procedure, usinga calculator that provides segment area.X1.
44、3 There are two possible routes of entry of moisture vapor through the seal: (1) laterally through the adhesive layer and (2)through the tape substrate, or backing, which is a vapor retarding material, then into and through the adhesive layer. In some cases,such as a heavy aluminum foil tape, the ba
45、cking itself is impermeable, so the only route of entry is through the adhesive layer.X1.4 For practicality in expressing performance, the permeation of water vapor is attributed to the full area of the joint.X2. ADDITIONAL INFORMATION TO BE PROVIDED IN REPORTS OR PUBLISHED DATAX2.1 For reports, whe
46、n specimens are prepared in advance by other than the testing lab, this should be noted and the prepareridentified.X2.2 Published data should include the following information to describe the test method employed:X2.2.1 ASTM Test Methods E96/E96M,X2.2.2 The specific Test Methods E96/E96M procedure (
47、method and conditions), or other test conditions, employed, andX2.2.3 The wording: “Specimens prepared per Practice C1809.”ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expr
48、essly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revise
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