Special duty propane

SPEC benchmark Special-duty propane Special effects Specialty chemicals... 

Specifications for the principal LPG products are summarized in Table 4. Detailed specifications and test methods for LPG are pubHshed by the Gas Processor s Association (GPA) (3) and ASTM (4). The ASTM specification for special-duty propane and GPA specification for propane HD-5 apply to propane that is intended primarily for engine fuel. Because most domestic U.S. LPG is handled through copper tubing, which could fail if corroded, all products must pass the copper strip corrosion test. A test value of No. 1 represents a LPG noncorrosive to the copper. 

In addition, liquefied petroleum gas is usually available in different grades (usually specified as Commercial Propane, Commercial Butane, Commercial Propane-Butane (P-B) Mixtures, and Special Duty Propane) (Rawlinson and Ward, 1973). During the use of liquefied petroleum gas, the gas must vaporize completely and bum satisfactorily in the appliance without causing any corrosion or producing any deposits in the system. 

Special Duty Propane is intended for use in spark-ignition engines, and the specification includes a minimum motor octane number to ensure... 

Figure 11-44. Condenser duty for single-stage propane refrigeration system. (Excerpted by special permission Mehra, Y. R. Chemical Engineering March 26, 1979. McGraw-Hill, Inc., New York. All rights reserved.)...

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