FM 2311 : 2008

1 INTRODUCTION
  1.1 Purpose
  1.2 Scope
  1.3 Basis of Requirements
  1.4 Basis of Approval
  1.5 Basis for Continued Approval
  1.6 Effective Date
  1.7 Systems of Units
  1.8 Applicable Documents
  1.9 Definitions
2 GENERAL INFORMATION
  2.1 Product Information
  2.2 Approval Application Requirements
  2.3 Requirements for Samples for Examination
3 GENERAL REQUIREMENTS
  3.1 Review of Documentation
  3.2 Physics of Structural Features
  3.3 Materials
  3.4 Markings
  3.5 Manufacturer's Installation and Operational Instructions
  3.6 Calibration
  3.7 Tolerances
4 PERFORMANCE REQUIREMENTS
  4.1 Examination
  4.3 Accuracy/Hysteresis
  4.4 Readability
  4.5 Cycling Pressure Endurance
  4.6 Moisture Exposure
  4.7 Hydrostatic Strength/Rupture
  4.8 Vibration
  4.9 Salt Spray Exposure
  4.10 Additional Tests
5 OPERATIONAL REQUIREMENTS
  5.1 Demonstrated Quality Control Program
  5.2 Facilities and procedures Audit (F&PA)
  5.3 Manufacturer's Responsibility
  5.4 Manufacture ring and Production Tests
      5.4.1 Cycle Test
      5.4.2 Accuracy
APPENDIX A: Units of Measurement
APPENDIX B: FM Approvals Certification Marks
APPENDIX C: Tolerance
APPENDIX D: Sample Testing

Describes the design and performance requirements of pressure gauges with nominal case sizes of 3-1/2, 4, or 4-1/2 inch (90, 102, or 115 mm) diameter.