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\ AMERICAN NATIONAL STANDARD X61.1-1981 5.2 Qualification Tests. The qualification tests passed around two pulleys with diameters as are intended to establish that the hose is properly shown in Table IV. A 30-pound (13.6 kg) weight designed and constructed to give satisfactory shall then be attached to the free end. service life. These tests shall be conducted by a 5.2.1.2.2 From the remainder of hose recognized independent laboratory.The qualifi- cation tests shall consist of all the tests specified length marked "I" (sizes 1 inch (25.4 mm) and herein,includingthe ammonia performance test. under only), cut a section to length indicated in Two 12-foot(3.6 m)lengths shall beselected for Table IV. Connect one end to the vertically the ammonia performance test. Each new hose traveling block as shown 1n Fig. 1, and connect design shall be subjected to a qualification test, the other end to the liquid space of a tank of and again whenever there has been a design anhydrous ammonia. Maintain the temperature change. of hose and ammonia between 70'F (21.0'C) to 90'F(32.2'C).The test on the feeder hose does not 5.2.1 Ammonia Performance Test.Two 12- apply to sizes over 1 inch (25.4 mm). To conduct foot(3.6 m)lengths of hose, to be marked"I"and the flex test on the larger sizes any convenient "II", shall be filled with liquid' anhydrous hose may be used as a feeder hose. ammonia by connecting to a tank and flushing out with ammonia to remove all the air.One end 5.2.1.2.3 The flexing test shall continue l f each length shall be sealed and the other end for 72 hours at a rate of approximately 470 cycles left connected to the liquid space a a tank a per hour with a 42-inch (1.07 m) vertical move- anhydrous ammonia. The hose shall then be ment of the traveling block.A valve between the of 60OF (1 for 14 days at Fambient(3 . temperature ammonia tank'and the hose may be closed of 60 F (15.5 C) to 100 F (37.8 C). A valve providing it is opened at least once each day to between the ammonia tank and the hose may be pressurize the hose.The hose shall be examined closed providing it is opened at least once each each day for visible defect. There shall be no anhydrous ammonia-The hose shall be examined day completely fill the hose with liquid evidence of cover blistering or leakage. each day for visible defects. There shall be no evidence of the cover blistering or perceptible 5.2.1.2.4 At the conclusion of the flexing leakage.If the hose is valved off at each end when period,cut a 24-inch(610 mm)sample from hoses liquid full, a hydrostatic relief valve should be 'I and"II"and subjecteachsample toastraight . provided between the black valves. burst test in accordance with Section 5.1.1. All samples shall have a minimum burst of 1750 psig 5.2.1.1 Conditioned Hose Burst Test.A24- (12.1MPa). inch (610 mm) sample cut from hose marked "I" 6. MARKINGS shall be subjected to a straight hydrostatic bursting test in accordance with Section 5.1.1. Hose shall be clearly marked at least once 5.2.1.2 Conditioned Hose Flexing Test every five feet with manufacturer's name or trademark, "Anhydrous Ammonia", the max- 5.2.1.2.1 The 12-foot (3.6 m) hose length imum working pressure in psig, year of manu- marked "II" shall be installed in flexing test facture, and "RMA-TFI Spec". As indicated in machine (Fig. 1). One end of the hose is to be the Scope,the maximum working pressure must connected to the traveling block and the free end not be less than 350 psig(2.4 MPa). Table IV Nominal Pulle Pulley Y Diameter Feeder I.D. Diameter Tolerance t Hose Length Inch mm Inch mm Inch mm Inch mm % (0.500) 12.7 14 355 0.250 6.4 36 915 '/, ((0.750) 19.1 14 355 0.250 6.4 36 915 1 1.000) 25.4 14 355 0.250 6.4 36 915 1t/, 1.250) 31.8 15 380 0.250 6.4 I% 1.500) 38.0 18 460 0.250 6.4 2 2.000 51.0 24 610 0.250 6.4 2'/z 2.500 64.0 30 762 0.250 6.4 3 3-000 76.0 1 36 915 1 0.250 1 6.4 29