1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJanuary 29, 20131UL 1356OUTLINE OF INVESTIGATIONFORPIPE JOINT SEALING COMPOUNDSIssue Number: 4JANUARY 29, 2013Summary of TopicsThis new issue of UL 1356 is being issued to:1) Specify ASTM Referen
2、ce H as the test fluid to be used toestablish a gasoline rating2) Delete requirements related to establishing a fire hazard ratingfor the products3) Add requirements for the evaluation of products for gasoline/ethanol blends, biodiesel and diesel/biodiesel blends4) Make miscellaneous other revisions
3、 to clarify test methods andbring them closer to those in the Outline of Investigation forPolytetrafluoroethylene Plastic Seal Materials, UL 1321This issue becomes effective January 29, 2013.COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
4、ORDISTRIBUTION WITHOUT PERMISSION FROM ULJANUARY 29, 2013UL 13562No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 General 43 Units of Measurement .44 Undated References 5PERFORMANCE5 General 5
5、6 Assembly Construction and Initial Pressure Testing .56.1 Test assemblies 56.2 Construction of assemblies 56.3 Tests for liquid fuel applications 86.4 Test for butane and propane applications 96.5 Test for 300 psig (2070 kPa) natural gas applications 107 Sprinkler System and Water Spray System Test
6、s RESERVED 108 Electrical Resistance at Joints .109 Corrosion Tests 11IDENTIFICATION TESTS10 General 11MARKING11 General 11JANUARY 29, 2013 UL 1356 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements are
7、for use in the investigation of sealing compound products supplied in liquid,semiliquid, or heavy paste (stick) form, where the product is intended to make threaded metal pipe jointstight against leakage. These products are evaluated when applied in accordance with the manufacturersinstructions, to
8、male threads of metal pipe assemblies. The products are rated for use in equipmentintended to handle gasoline, gasoline/ethanol blends, diesel fuel, biodiesel/diesel fuel, biodiesel, naphtha,benzene, kerosene, petroleum oils, natural gas, propane, or butane as specified by the manufacturer.1.2 The i
9、nvestigation includes tests for the sealing effectiveness of the product, and tests to determinethat the product does not cause significant corrosion of common metals or adversely affect the electricalcontinuity of pipe assemblies on which it is used. The investigation also includes analytical tests
10、 requiredfor product identification purposes.1.3 This outline of investigation does not cover the classification of the product in regard to itsflammability, the toxicity of the product or its vapors due to flammability or the effect of normal atmosphericconditions on the product while in storage or
11、 in use.1.4 If requested, the sealing of threaded joints in pipe sizes larger than 2 inches may be investigatedusing appropriate adaptation of tests described in Section68.Tests for uses other than those indicatedare not within the scope of these requirements.2 General2.1 Product application instruc
12、tions deemed to be adequate for its proper use shall be provided by themanufacturer. The manufacturer shall also provide product composition information in sufficient detail topermit development of an appropriate analytical test program for product identification.3 Units of Measurement3.1 Values sta
13、ted without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.JANUARY 29, 2013UL 13564UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Undated References4.1 Any undated reference to a code or sta
14、ndard appearing in the requirements of this outline ofinvestigation shall be interpreted as referring to the latest edition of that code or standard.PERFORMANCE5 General5.1 Sealed pipe assemblies required for the following tests shall be made using product applied inaccordance with the manufacturers
15、 printed instructions.6 Assembly Construction and Initial Pressure Testing6.1 Test assemblies6.1.1 Pipe assemblies are to be constructed in accordance with 6.1.2 6.1.4, from commercial gradeSchedule 40, minimum, malleable iron pipe and fittings (ANSI B16.3).6.1.2 The fittings used are to be threaded
16、 with tapered pipe threads cut in accordance with ASMEB1.20.1 NPT tapered pipe thread.6.1.3 The mating male and female thread patterns are to be checked for evidence of damage to threadsand with regard to tolerance with ring and plug gauges manufactured in accordance with ASME B1.20.1.Only pipe and
17、fittings that show no significant evidence of thread damage and that comply with ASMEB1.20.1 tolerances shall be used to construct assemblies.6.1.4 Prior to assembly, thread patterns are to be cleaned thoroughly with a suitable degreasing solventto the extent that all traces of oil, grease, dirt, or
18、 rust are removed. Then the assembly shall be allowedto air dry at room temperature.6.2 Construction of assemblies6.2.1 The test assemblies are to be constructed for each end-use application using one tee of the largestpipe size required for testing, a reducing bushing, pipe nipple, bell reducer to
19、-inch pipe size, -inch pipenipple, -inch tee and -inch pipe nipple, with all open fittings closed with a plug as illustrated in Figure6.1.This is generated text for figtxt.JANUARY 29, 2013 UL 1356 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM
20、 ULFigure 6.1Pipe assembly diagramJANUARY 29, 2013UL 13566UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.2.2 For an assembly intended to be used for evaluation of the product for 300 psig (2070 kPa) naturalgas applications, the -inch plug i
21、n the -inch tee shall be replaced with a -inch nipple approximately8 inches long.6.2.3 The product under test is to be applied to the male threads of the joints in accordance with themanufacturers instructions.6.2.4 The assembly joints are to be tightened to the torque specified in Table 6.1.Table 6
22、.1Torque requirements for pipe thread (NPT) connectionsNominal pipe size,aTorque,inches pounds-inches / foot-pounds (Nm)1/8 150 /12.5 (16.9)1/4 250 / 21 (28.3)3/8 450 / 38 (51.9)1/2 800 / 67 (90.4)3/4 1000 / 83 (113.0)1 1200 / 100 (135.5)1-1/4 1450 / 121 (163.8)1-1/2 1550 / 129 (175.1)2 1650 / 138 (
23、186.4)aANSI/ASME B1.20.16.2.5 After standing at room temperature for at least 24 hours or the minimum set up time specified bythe manufacturer, if less than 24 hours, each assembly shall be checked to verify an initial seal bypressurizing the assembly for 5 minutes with air in a room temperature wat
24、er bath to 300 psig (2070 kPa)or the maximum pressure to which it will be subjected when charged with the test medium, whichever isgreater. If leakage is noted that cannot be stopped by retightening to the torque specified above, or if theproduct is of such a composition that joints cannot be retigh
25、tened after the product has cured, the jointshall be disassembled and inspected. If defects in the threads, pipe or fittings are evident, the test shallbe considered invalid and shall be repeated with an assembly constructed of new pipe and fittings. If nodefects in the threads are noted and it is p
26、ossible to remove the product from the joint threads, the productshall be removed from both male and female threads and the joint shall be reassembled with a newapplication of product in accordance with the manufacturers instructions and the prescribed torque. If it isnot possible to remove the prod
27、uct from the leaking joint, a new assembly shall be constructed. If it isagain not possible to obtain an initial seal, further testing shall be discontinued.JANUARY 29, 2013 UL 1356 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.3 Tests fo
28、r liquid fuel applications6.3.1 A pipe assembly constructed and initially tested as described in 6.1.1 6.2.5 shall not lose morethan 45 milliliters of fuel when tested as described in 6.3.2 6.3.5 and then shall withstand a pressure of300 psig (2070 kPa) for 15 minutes without showing visible evidenc
29、e of leakage as described in 6.3.6.6.3.2 For gasoline and gasoline/ethanol blend applications up to 10 percent ethanol, the assembly is tobe filled to a predetermined level approximately 1 inch (25.4 mm) from the top of the assembly with ameasured amount of ASTM Reference Fuel H and connected in the
30、 vertical position to a header. Theassembly shall be maintained in the vertical position throughout the test period. The header is to beprovided with an air-pressure gauge and connected through pressure reducers to a compressed air line.The pressure reducer is to be adjusted to supply a pressure of
31、30 psig (210 kPa) to the header and pipeassembly.6.3.3 If leakage is observed at any of the joints within 24 hours and the product is the type that can beretightened, the assembly shall be disconnected from the header, emptied of fuel, and the leaking jointsretightened to the prescribed torque with
32、care taken not to disturb the remaining joints. The retightenedassembly shall then be refilled with test fuel, connected to the header, and the pressure reapplied. Ifleakage is not stopped with this further tightening, or if the product is of such a composition that jointsshould not be retightened a
33、fter the product has cured, unacceptable performance shall be recorded andtesting shall be discontinued.6.3.4 If no initial leakage is observed during the 24-hour period following sealing or re-sealing, thepressure is to be maintained at 30 psig (210 kPa) for a total of 90 days, during which time pe
34、riodicobservations are to be made for evidence of leakage.6.3.5 At the end of the 90-day period, the assembly is to be carefully depressurized to prevent suddenoutgassing of air and loss of fuel, after which it shall be removed from the header and the amount of fuelneeded to restore the original lev
35、el shall be measured.6.3.6 The assembly shall then be emptied of fuel, filled with water and subjected to a pressure of 300 psig(2070 kPa) for 15 minutes during which time it shall be observed for leakage.6.3.7 Acceptable test performance with respect to testing with ASTM Reference Fuel H is conside
36、red tocover also the suitability of the product for use with naphtha, benzene, kerosene, and petroleum oils.6.3.8 For E25 applications (ethanol/gasoline blends from 0 to 25 percent ethanol), the product shall beevaluated in accordance with 6.3.1 6.3.6 using the E25a test fluid in place of ASTM Refer
37、ence Fuel H.For E85 applications (ethanol/gasoline blends from 0 to 85 percent ethanol), the product shall beevaluated in accordance with 6.3.1 6.3.6 in two separate assemblies, one filled with E25a test fluid andthe other filled with E85a test fluid in place of ASTM Reference Fuel H. The formulatio
38、n of these test fluidsis described in E25a and E85a Test Fluids, Supplement SA. To establish an E85 rating, the product shallcomply with the maximum fuel loss requirement with both test fluids. Acceptable test performance withrespect to testing with E25a test fluid is considered to cover also the su
39、itability of the product for use withgasoline, naphtha, benzene, kerosene, and petroleum oils.JANUARY 29, 2013UL 13568UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.3.9 For B20 applications (biodiesel/diesel fuel blends from 0 to 20 percent
40、 biodiesel), the product shallbe evaluated in accordance with 6.3.1 6.3.6 using FB25a test fluid in place of ASTM Reference Fuel H.For B99.9 - B100 applications (biodiesel), the product shall be evaluated in accordance with 6.3.1 6.3.6using B100a test fluid in place of ASTM Reference Fuel H. The for
41、mulation of these test fluids is describedin B20 and B99.9/B100 Test Fluids, Supplement SB. Acceptable test performance with respect to testingwith FB25a is considered also to cover the suitability of the product for use with diesel fuel.6.4 Test for butane and propane applications6.4.1 Pipe assembl
42、ies constructed and initially tested as described in 6.1.1 6.2.5 shall not lose morethan 12.6 g of butane or 11.1 g of propane after 42 days when tested as described in 6.4.2 6.4.5.Acceptable test performance with propane is considered also to cover the suitability of this product for usewith natura
43、l gas at a pressure not exceeding 100 psig (690 kPa).6.4.2 The sealed assembly shall be cooled in a cold chamber to a temperature of minus 30 to minus 40C(minus 22 to minus 40F) and then filled to about 3/4 capacity with liquefied propane or butane, asrequested by the manufacturer. The assembly shal
44、l be sealed with the product using a -inch cap.6.4.3 After being filled and closed, the assembly shall be allowed to stand at room temperature for 4hours or for the minimum time required for the product to cure as specified by the manufacturer, and thenimmersed in water at room temperature. If leaka
45、ge is observed at any of the joints within 24 hours, theleaking joints are to be re-tightened, to the prescribed torque, with care taken not to disturb the otherjoints. If the product is of such a composition that joints should not be retightened after the product hascured, the test shall be continu
46、ed regardless of whether a seal was achieved.6.4.4 The assembly shall be blotted dry with a towel and allowed to stand at room temperature until aconstant weight is achieved but not more than 4 hours, and then weighed and placed for 28 days in awell-ventilated room maintained at a temperature of 23.
47、0 2C (73.4 3.6F). This temperaturecorresponds to a pressure of 116 psig (800 kPa) for propane and 19 psig (131 kPa) for butane. Theassembly shall be weighed at the end of this period, or prior to it if significant leakage is noted. If propaneor butane loss exceeds two-thirds of the total amount perm
48、itted to be lost as specified in 6.4.1,unacceptable performance shall be recorded and the tests shall be discontinued.6.4.5 If after 28 days the assembly weight loss is within acceptable limits, the assembly shall be placedin a chamber maintained at a temperature of 48.9 2C (120 3.6F) for 14 days. T
49、his temperaturecorresponds to a pressure of 225 psig (1552 kPa) for propane and 56 psig (386 kPa) for butane. At theend of this time or prior to it if significant leakage is noted, the assembly shall be weighed to determinethe loss of propane or butane. If at any point the total propane or butane loss exceeds that specified in6.4.1, the test shall be discontinued.JANUARY 29, 2013 UL 1356 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.5 Test for 300 psig (2070 kPa) natural
