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AMERICAN NATIONAL STANDARD K61.1.1981 <br /> APPENDIX B <br /> SPECIFICATIONS FOR <br /> ANHYDROUS AMMONIA HOSE <br /> 1. SCOPE <br /> This specification covers hose and hose assemblies, commonly referred to as "pressure transfer <br /> hose",used to convey anhydrous ammonia liquid or to convey anhydrous ammonia gas where the gas is <br /> in cowl-with liquid ammonia. <br /> 2. PRESSURE RATING PSI (MPa) <br /> Working Pressure, Maximum 350 psi ( 2.4 MPa) <br /> Burst Pressure, Minimum 1,750 psi (12.1 MPa) <br /> Note: These figures should not be misconstrued to mean that they are the maximum pressures to which <br /> anhydrous ammonia hose and hose assemblies are built,since higher pressure hose and hose assemblies <br /> are available for special applications. <br /> 3. DIMENSIONS AND TOLERANCES <br /> Anhydrous Ammonia Hose shall be made with the following dimensions and tolerances. <br /> 3.1 Table I -Rubber Covered Hose for Use with Two-Piece Screw Type Couplings <br /> Nominal Tolerance Nominal Tolerance <br /> - I.D. - I.D.t O.D. O.D.t <br /> Inch mm Inch mm Inch mm Imm <br /> l / 0.500) -- -12.7-- 0.031 0.79 /16 0.938 23.9 ::nch <br /> .031 0.79 <br /> 0.750) 19.1 0.031 0.79 1% 1.250 31.8 .031 0.79 <br /> t isa�1 1.000) 25.4 0.063 1.59 1%z 1.500 38.0 .063 1.59 <br /> 3.2 Table II -Non Rubber Covered and Rubber Covered Hose <br /> for Use With Full Flow Couplings <br /> Nominal Tolerance Nominal Tolerance <br /> I.D. I.D. . O.D. O.D.t <br /> Inch mm Inch mm Inch mm Inch mm <br /> (0.406) 10.3 +0.031-0.000 +0.8-0.0 0.766 19.5 0.023 0.58 <br /> (0.500) 12.7 +0.039-0.000 +0.0-0.0 0.922 23.5 0.023 0.58 <br /> (0.625) 15.9 +0.042-0.000 +1.1-0.0 1.0708 27.4 0.023 0.58 <br /> - (0.875) 22.2 +0.042-0.000 +1.1-0.0 1.234 31.4 0.031 0.79 <br /> 1% (1.125) 28.6 +0.047-0.000 +1.2-0.0 1.500 38.0 0.031 0.79 <br /> 1% (1.375) 34.9 +0.047-0.000 +1.2-0.0 1.750 44.0 0.031 0.79 <br /> 1"/1e (1.813) 46.0 +0.047-0.000 +1.2-0.0 2.219 57.0 0.047 1.19 <br /> 3.3 Table III -Hose for Use With Other Types of Couplings` <br /> Nominal Tolerance Nominal Tolerance <br /> I.D. I.D.t I.D. I.D.t <br /> Inch mm Inch mm Inch mm Inch mm <br /> (0.500) 12.7 0.031 0.79 1%z (1.500) 38.0 0.063 1.59 <br /> 3% (0.750) 19.1 0.031 0.79 2 (2.000) 51.0 0.063 1.59 <br /> 1 (1.000) 25.4 0.063 1.59 2yz (2.500) 64.0 0.063 1.59 <br /> 1'/. (1.250) 31.8 0.063 1.59 3 (3.000) 76.0 0.063 1.59 <br /> .The O.D. dimensions and tolerances were intentionally <br /> omitted from this tabulation to provide for developments in <br /> both hose and couplings. <br /> 27 <br />