1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDecember 8, 20061SUBJECT 2156OUTLINE OF INVESTIGATIONFORRUBBER HOSE FOR RADIANT HEATINGIssue Number: 3DECEMBER 8, 2006Summary of TopicsThis new issue of SU 2156 is being issued through ULs electr
2、onicpublishing system to ensure format uniformity between the PDF andHTML versions of the document. No substantive changes have beenincorporated in the document.The UL Foreword is no longer located within the UL Standard. For informationconcerning the use and application of the requirements containe
3、d in thisStandard, the current version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2006 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 8, 2006SUBJECT 21562No Text on This PageUL COPYRIG
4、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 General 52.1 Units of measurement .52.2 Undated references .6CONSTRUCTION3 Types .64 Internal Diameter .65 Tube and Cover 65.1 General .65.2 Thickness of tube and cover .76
5、Reinforcement 7PERFORMANCE7 Proof Pressure Test .87.1 General .87.2 Samples .87.3 Apparatus .87.4 Method 88 Hydrostatic Strength Test 88.1 General .88.2 Sample 88.3 Apparatus .98.4 Method 99 Adhesion Test 99.1 General .99.2 Sample 99.3 Apparatus 109.4 Method .1010 Tensile Strength and Elongation Tes
6、t of Tube and Cover 1010.1 General .1010.2 Samples 1010.3 Apparatus .1010.4 Method .1111 Accelerated Air Oven Aging Test of Tube and Cover 1111.1 General .1111.2 Samples 1111.3 Apparatus .1211.4 Method .1212 Ozone Exposure Test .1212.1 General .1212.2 Samples 1212.3 Apparatus .1312.4 Method .1313 Im
7、mersion Tests of Rubber Tube .1313.1 General .13DECEMBER 8, 2006 SUBJECT 2156 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL13.2 Sample .1413.3 Apparatus .1413.4 Method effect on tensile strength and ultimate elongation .1413.5 Method effec
8、t on volume 1514 Deformation by External Loading .1514.1 General .1514.2 Sample .1514.3 Apparatus .1514.4 Method .1615 Deformation by Bending .1615.1 General .1615.2 Sample .1615.3 Apparatus .1615.4 Method .1616 Hydrostatic Strength After Accelerated Air-Oven Aging 1716.1 General .1716.2 Sample .171
9、6.3 Apparatus .1716.4 Method .1717 Hydrostatic Strength After Exposure to Heat Transfer Fluids .1717.1 General .1717.2 Sample .1717.3 Apparatus .1817.4 Method .1818 Hydrostatic Strength After Exposure to Abnormal Temperatures 1818.1 General .1818.2 Sample .1818.3 Apparatus .1818.4 Method .19MANUFACT
10、URING AND PRODUCTION TESTS19 General 19MARKING20 General 19DECEMBER 8, 2006SUBJECT 21564UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover hose, in sizes up to and including a nominal internal diame
11、ter of 1 inch(25.4 mm), intended to convey water or other heat transfer fluids, at a maximum working pressure of 100psig (0.69 MPa) and a maximum working temperature of 82C (180F), for the purpose of radiant heatingof floors and driveways. The hose can be installed in direct contact with combustible
12、 building materials.The hose is intended to be installed in accordance with the manufacturers installation instructionsprovided with the product and any local codes.1.2 These requirements do not cover couplings or their method of attachment.1.3 These requirements do not include the heat source, mani
13、folds, valves, controls, or the efficiency ofheat transfer.1.4 The fire resistance rating of a floor assembly, existing or new construction, may be adversely affectedby the installation of the heating hose or hose assemblies, unless the rating of the floor assembly incombination with the hose or hos
14、e assembly has been determined and found suitable for the application.The local authorities having jurisdiction should be consulted as to the acceptability of the fire resistancerating of the floor assembly with the hose or hose assembly installed.1.5 A product that contains features, characteristic
15、s, components, materials, or systems new or differentfrom those covered by the requirements in this Outline, and that involve a risk of fire, electric shock, orinjury to persons, shall be evaluated using the appropriate additional component and end-productrequirements as determined necessary to main
16、tain the acceptable level of safety as originally anticipatedby the intent of this Outline. A product whose features, characteristics, components, materials, or systemsconflict with specific requirements or provisions of this Outline cannot be judged to comply with thisOutline. Where considered appr
17、opriate, revision of requirements shall be proposed and adopted inconformance with the methods employed for development, revision, and implementation of this Outline.2 General2.1 Units of measurement2.1.1 If a value for measurement is followed by a value in other units in parentheses, the second val
18、uemay be only approximate. The first stated value is the requirement.DECEMBER 8, 2006 SUBJECT 2156 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.2 Undated references2.2.1 Any undated reference to a code or standard appearing in the requir
19、ements of this Outline shall beinterpreted as referring to the latest edition of that code or standard.CONSTRUCTION3 Types3.1 All hose shall consist of a rubber tube, a reinforcement of cotton or synthetic fibers, and a rubbercover.4 Internal Diameter4.1 The internal diameter of a hose shall be equa
20、l to the nominal size 1/32 inch (0.8 mm) as determinedby the method described in 4.2 and 4.3.4.2 A tapered plug gauge of wood or metal having a taper of 3/8 inch per foot (31.3 mm/m) marked toindicate variations of 1/64 inch (0.4 mm) in diameter, a set of wood or metal plug gauges, straight or ballt
21、ype, in increments of 0.01 inches (0.25 mm), or in some cases, an expanding ball gauge and micrometeror other equivalent means to accurately measure the expanded ball, is to be used. See 4.3.4.3 The end of the hose is to be cut square. If a tapered plug gauge is used, the plug gauge is to beinserted
22、 in the hose sample until a close fit is obtained without forcing. The diameter of the gauge at theend of the sample, to the nearest 1/64 inch (0.4 mm), is to be recorded as the internal diameter of thehose. If a set of straight or ball-type plug gauges is used, the diameter of the gauge, which when
23、 insertedin the hose sample gives a close fit without forcing, is to be recorded as the internal diameter of the hose.If the end of a hose is constructed or flared, the inside diameter is to be measured far enough from theend to be representative of the inside diameter by means of an expanding ball
24、gauge.5 Tube and Cover5.1 General5.1.1 The tube or lining and the cover of a hose shall be made from synthetic rubber, which is referredto hereafter as rubber.5.1.2 A tube and a cover shall be of uniform thickness, and free from pitting, blisters or otherimperfections that would impair its intended
25、use. This requirement is not intended to exclude the use ofa corrugated cover or wrapped cover finish.DECEMBER 8, 2006SUBJECT 21566UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.2 Thickness of tube and cover5.2.1 The thickness of a tube sha
26、ll not be less than 0.047 inch (1.19 mm) and that of a cover not lessthan 0.030 inch (0.76 mm), when determined in accordance with 5.2.2 5.2.6.5.2.2 For removing irregularities in samples, the buffing machine or skiving machine outlined in thePractice for Rubber Preparation of Pieces of Test Purpose
27、s for Products, ASTM D3183-84(1992), is tobe used.5.2.3 The abrasive wheel of the buffing machine is to be No. 30 60 grit, and the diameter and rotaryvelocity of the wheel are to be such that it will have a peripheral speed of 4000 700 feet per minute (20.33.6 m/s). The machine is to be provided wit
28、h a slow feed so that very little compound can be removedat one cut to avoid overheating of the specimen.5.2.4 A dial micrometer graduated to 0.001 inch (0.03 mm) that exerts a load of 80 85 grams by meansof a weight is to be used. The load is to be applied through a flat contact foot 0.250.01 inch
29、(6.4 0.3mm) in diameter.5.2.5 To determine the thickness of the tube and cover, a strip, approximately68inches (152.4 203.2mm) long and 1 inch (25.4 mm) wide, or as close to 1 inch (25.4 mm) as possible from small diameterhose, is to be cut from the hose, and the part separated from the plies. If th
30、e thickness of the part is notuniform around the circumference of the hose, the strip is to be cut from the thinnest portion of the sample.5.2.6 The strip specimen is to be buffed or skived to remove the impressions left by the fabric or braid orother surface irregularities, using the equipment desc
31、ribed in 5.2.2 and 5.2.3. A series of five thicknessmeasurements are to be taken within the area from which the impressions have been removed, and themaximum reading obtained is to be taken as the thickness of the part.6 Reinforcement6.1 Plies of reinforcement shall be of cotton or synthetic fibers,
32、 and shall be evenly and firmly applied overthe tube. Braids and spirals shall be thoroughly impregnated with a rubber compound that shall cause theplies to adhere firmly to each other and to the rubber tube and cover.6.2 Hose shall have at least one braid or two plies of spirals. Adjacent plies of
33、spirals shall be wound inopposite directions.DECEMBER 8, 2006 SUBJECT 2156 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFORMANCE7 Proof Pressure Test7.1 General7.1.1 The hose, when lying straight, shall withstand a hydrostatic pressure
34、of 200 psig (1379 kPa) for fiveminutes without leakage, ballooning, or rupture.7.2 Samples7.2.1 A 3-foot (0.9 m) length of hose is to be used.7.3 Apparatus7.3.1 The hydrostatic equipment specified in Methods of Testing Rubber Hose, ASTM D380-94, is to beused for this test.7.4 Method7.4.1 This test i
35、s to be conducted at a test pressure of 200 psig (1379 kPa) for 5 minutes in accordancewith the test methods specified in Methods of Testing Rubber Hose, ASTM D380-94.8 Hydrostatic Strength Test8.1 General8.1.1 The hose, while lying straight, shall withstand a hydrostatic pressure of 800 psig (4137
36、kPa) withoutleakage, ballooning, or rupture while at room temperature and a hydrostatic pressure of 600 psig (4137kPa) while at 82 2C (180 3.6F).8.2 Sample8.2.1 Three-foot (0.9 m) lengths of hose are to be used.DECEMBER 8, 2006SUBJECT 21568UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCT
37、ION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.3 Apparatus8.3.1 The hydrostatic apparatus for this test is to be the same as that specified in 7.3.1. The sample isto be placed in an enclosure of sufficient strength to protect the operator. The water bath enclosure oroven is to be capable of maintain
38、ing a temperature of 82 2C (180 3.6F) and of sufficient strength toprotect the operator. A pump may be used to circulate water or oil maintained at 82 2C (180 3.6F)through the hose.8.4 Method8.4.1 A 3-foot (0.9 m) sample of hose, while lying straight and at room temperature, is to be subjected tothe
39、 Straight Bursting Test specified in the Methods of Testing Rubber Hose, ASTM D380-94.8.4.2 A 3-foot (0.9 m) length of hose is to be filled with water at a temperature of 50 2C (122 3.6F)and connected to the hydrostatic pressure system. The sample is then to be totally immersed in water andmaintaine
40、d at 82 2C (180 3.6F). As an alterative, the sample may be placed in an oven maintainedat 82 2C (180 3.6F), or water or oil maintained at 82 2C (180 3.6F) may be circulated through thehose. After conditioning for two hours and while the hose sample is in the heated water, or air, or filledwith the h
41、eated water or oil, it is to be subjected to the Straight Bursting Test specified in Methods ofTesting Rubber Hose, ASTM D380-94.9 Adhesion Test9.1 General9.1.1 The adhesion between the cover and the reinforcement or adjacent component shall be such thatthe rate of separation of a ring-shaped sample
42、, 1 inch (25.4 mm) in width, is not greater than 1 inch perminute (0.42 mm/sec) with a weight of 8 pounds (2.72 kg).9.1.2 The adhesion between the tube and the reinforcement shall be such that the rate of separation ofa ring-shaped sample 1 inch (25.4 mm) in width is not greater than 1 inch per minu
43、te (0.42 mm/sec) witha weight of 10 pounds (4.54 kg).9.2 Sample9.2.1 A 1-inch (25.4 mm) wide ring-shaped specimen cut from a representative sample of hose is to beused for this test.DECEMBER 8, 2006 SUBJECT 2156 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT
44、PERMISSION FROM UL9.3 Apparatus9.3.1 Adhesion tests are to be conducted with the type of apparatus described in the Test Methods forRubber Property Adhesion to Flexible Substrate, ASTM D413-82(1993).9.4 Method9.4.1 The tests are to be conducted in accordance with the test methods for ring specimens
45、outlined inthe Methods for Testing Rubber Hose, ASTM D380-94.10 Tensile Strength and Elongation Test of Tube and Cover10.1 General10.1.1 The tensile strength of a tube shall not be less than 1000 psi (6.89 MPa), and the ultimateelongation of a tube shall not be less than 200 percent from 1 to 3 inch
46、es (25.4 76.2 mm).10.1.2 The tensile strength of a cover shall not be less than 1000 psi (6.89 MPa), and the ultimateelongation of a cover shall not be less than 200 percent from 1 to 3 inches (25.4 76.2 mm).10.2 Samples10.2.1 Three samples each of the tube and cover, approximately 1 inch (25.4 mm)
47、wide andapproximately 8 inches (203 mm) long, are to be cut longitudinally from a representative section of thehose. The test specimens are to be obtained from these samples.10.3 Apparatus10.3.1 Tensile strength and elongation tests are to be made on a power-operated machine, as describedin the Test
48、 Methods for Rubber Properties in Tension, ASTM D412-92. The rate of travel of the poweractuated grip is to be 20 1 inches (508 25.4 mm) per minute.10.3.2 The elongation is to be measured by means of a scale or another device capable of indicatingelongation with an accuracy of 0.1 inch (2.5 mm). Thi
49、s device is to be used in such a way that thespecimen is not damaged.10.3.3 The specimens are to be buffed or skived with the equipment specified in 5.2.2 and 5.2.3.10.3.4 Die C, as described in the Test Methods for Rubber Properties in Tension, ASTM D412-92, is tobe used for cutting the specimens.10.3.5 A dial micrometer, as described in 5.2.4, is to be used to measure the thickness of the specimens.DECEMBER 8, 2006SUBJECT 215610UL COPYRIGHTED MATERIAL NOT AUTHORIZED
