This Standard Practice lists and definesprinciple terms and acronyms widely used todescribe general purpose valves, fittings, andrelated components. It is comprised ofseparate sections which contain:Acronyms for organizations whosedocuments are applicable to valves andfittings, and a brief summary of theapplicable area of interest.A glossary of terms used in valve andfittings specifications to describedesign, operation, and performancecharacteristics. Abbreviations commonly used in thevalve and fittings industry.