FM 1631 : 2006

1 INTRODUCTION
  1.1 Purpose
  1.2 Scope
  1.3 Basis for Requirements
  1.4 Basis for Approval
  1.5 Basis for Continued Approval
  1.6 Effective Date
  1.7 System 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 Physical or Structural Features
  3.3 Materials
  3.4 Markings
  3.5 Manufacturer's Installation and Operation Instructions
  3.6 Calibration
  3.7 Tolerances
4 PERFORMANCE REQUIREMENTS
  4.1 Examination
  4.2 Thermal Integrity
  4.3 Hydrostatic Integrity
  4.4 Vibration Resistance (Adjustable Sprinkler Fittings Only)
  4.5 Mechanical Stop (Adjustable Sprinkler Fittings Only)
  4.6 Flow Restriction
  4.7 Additional Tests
5 OPERATIONS REQUIREMENTS
  5.1 Demonstrated Quality Control Program
  5.2 Facilities and Procedures Audit (F&PA)
  5.3 Manufacturer's Responsibilities
  5.4 Manufacturing and Production Tests
APPENDIX A: Units of Measurement
APPENDIX B: FM Approvals Certification Marks
APPENDIX C: Tolerance
APPENDIX D: Sample Listing

Specifies the design and performance requirements for 1/2 in. through 2 inch nominal size fixed and adjustable sprinkler fittings.