ASME B19.3:1991 pdf free download

ASME B19.3:1991 pdf free download SAFETY STANDARD FOR COMPRESSORS FOR PROCESS INDUSTRIES
1 GENERAL
1.1 Purpose It is the purpose of this Standard to make available general information on safe practices and specific recom- mendations covering basic safety requirements for com- pressors used in the process industries. This information is intended to provide guidance to those who design, install, and operate compressors. Safety requirements de- scribed in this Standard for compressor auxiliary equip- ment, including drivers, shall not apply to such auxiliary equipment when used in applications other than compres- sor installations.
1.2 Scope
(a) The specific recommendations in this Standard cover the requirements for safety devices and protective facilities to prevent compressor accidents as a result of excessive pressure, destructive mechanical failures, internai fires or explosions, and leakage of toxic or flammable fluids. General safety practices and hazards unique to compressors are also covered. This Standard applies to the compressor and its auxiliaries, including drivers, intercoolers, surge chambers, disengaging drums or scrubbers, interconnecting piping and lubrication, seal oil, and jacket water systems. The requirements of this Standard apply to all types of compressors (centrifugai, axial, rotary, and reciprocating) which are an integral part of facilities for processing petroleum, petrochemicals, or chemicals, including air separation plants. This Standard does not apply to plant utility air compressors,
(b) Although the provisions of this Standard will apply to the majority of typical compressors used in the process industries, exceptions to these recommendations with re- gard to certain facilities of unusual design or complexity may be necessary. In such cases, it is intended that design- ers capable of applying a complete and rigorous analysis to system requirements shall have latitude in the develop- ment of safety features. Provisions in this Standard are not intended to apply to (i) and (2) below:
( 1 ) basic mechanical design of compressor components. This Standard is based on the requirement that the compressor components be designed by qualified engi- neers in accordance with the recognized standards and specifications. Further, it is essential that these engineers have a thorough knowledge of the basic concepts of the design of such equipment components as cylinders, pis- tons, crankshafts, flywheels, bearings, pressure vessels, and piping.
(2) design and operation of connected process facil- ities. (c) The principles promoting safe operation of com- pressors used for process industries are not restricted to new compressor systems. It is recommended that all compressor systems be reviewed to consider possible changes due to revision of this Standard.
1.3 Definitions maximum allowable temperature – the maximum tem- perature for which the manufacturer has designed the compressor (or any part to which the term is referred) when handling the specified gas at the specified pressure maximum allowable working pressure the maximum pressure for which the manufacturer has designed the compressor (or any part to which the term is referred, such as an individual cylinder or casing) when handling the specified gas at the specified temperature maximum continuous speed – the highest speed at which the manufacturer’s design will permit continuous operation with overspeed and governor mechanisms installed and operating suigepoint the capacity below which operation becomes unstable at the operating speed of a centrifugai or axial compressor
1.4 References The latest edition of the following standards, codes, or specifications shall, to the extent specified herein, form a part of this Standard. The edition bearing the latest date of publication shall be used.
1.5 Format The mandatory rules of this Standard are charac- terized by use of the word shall. If a statement is of an advisoiy nature, it is indicated by use of the word should, or is stated as a recommendation.
1.6 SI (Metric) Units This Standard contains SI (metric) units as well as customary units. The SI units in the text have been directly (soft) converted from the customary units. Further information on the use of SI units is con- tained in ASTM E 380, Metric Practice Guide, and ASME Guide SI-1, Orientation and Guide for Use of SI (Metric) Units.