UFC 3 -430-11
14 February 2001
CONTENTS
Page
Paragraph
1-1
PURPOSE AND SCOPE ............................................................. 1-1
1-2
REFERENCES .............................................................................. 1-1
1-3
DEFINITIONS ................................................................................ 1-1
Paragraph
2-1
GENERAL ...................................................................................... 2-1
2-2
CONTROL SELECTION .............................................................. 2-1
2-3
PNEUMATIC CHARACTERISTICS ........................................... 2-1
2-3.1
Air Supply Pressure ...................................................................... 2-1
2-3.2
Design Considerations ................................................................. 2-2
2-3.3
Service Tubing Size ...................................................................... 2-2
2-3.4
Control Distance ............................................................................ 2-2
2-3.5
Instrument Air Regulation ............................................................ 2-2
2-4
ELECTRICAL CHARACTERISTICS .......................................... 2-2
2-4.1
Electrical Interface ......................................................................... 2-2
2-4.2
Communication Data Bus ............................................................ 2-2
Paragraph
3-1
GENERAL ...................................................................................... 3-1
3-2
CONTROL LOCATION ................................................................ 3-1
3-3
TURNDOWN .................................................................................. 3-1
3-4
INSTRUMENT RANGES ............................................................. 3-1
3-5
ALARMS AND SHUTDOWNS .................................................... 3-1
3-5.1
Design Criteria ............................................................................... 3-1
3-5.2
Testing and Servicing ................................................................... 3-1
3-5.3
Interlock and Safety Requirements ............................................ 3-2
3-5.3.1
Safety Interlocks ............................................................................ 3-2
3-5.3.2
Shutdown Valve Reset ................................................................. 3-2
3-5.3.3
Dedicated Safety System............................................................. 3-2
3-5.3.4
Special Considerations ................................................................. 3-3
3-6
HARDWARE .................................................................................. 3-3
3-7
EQUIPMENT RATING AND CLASSIFICATION ...................... 3-3
3-7.1
Enclosures ...................................................................................... 3-3
3-7.2
Hazardous Locations .................................................................... 3-5
3-7.2.1
Class Definition .............................................................................. 3-5
3-7.2.2
Division Definition .......................................................................... 3-5
3-7.2.3
Group Definition............................................................................. 3-5
3-7.3
Special Considerations ................................................................. 3-5
3-7.3.1
Maintenance ................................................................................... 3-5
3-7.3.2
Specification Completeness ........................................................ 3-6
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