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ASME PVHO-2-2019 Safety Standard for Pressure Vessels for Human Occupancy: In-Service Guidelines, 2019
- CONTENTS
- FOREWORD
- COMMITTEE ROSTER
- CORRESPONDENCE WITH THE PVHO COMMITTEE
- ASME PVHO-2–2019 SUMMARY OF CHANGES
- Section 1 General [Go to Page]
- 1-1 INTRODUCTION AND SCOPE
- 1-2 RESPONSIBILITIES AND JURISDICTIONAL CONSIDERATIONS [Go to Page]
- 1-2.1 User’s Responsibilities
- 1-2.2 Jurisdictional Considerations
- 1-3 IN-SERVICE EVALUATIONS, REPAIRS, AND MODIFICATION OF PVHOs [Go to Page]
- 1-3.1 In-Service PVHO Evaluation and Testing
- 1-3.2 PVHO Windows and Viewports
- 1-3.3 Pressure Boundary (Except for Windows)
- 1-3.4 Pressure Gauge Calibration
- 1-4 PVHO AND PVHO SYSTEMS DOCUMENTATION
- 1-5 OWNER’S MANUAL [Go to Page]
- 1-5.1 General
- 1-5.2 Component Description
- 1-5.3 Storage of Equipment
- 1-6 MAINTENANCE REQUIREMENTS [Go to Page]
- 1-6.1 General
- 1-7 CHECKLISTS AND LOGS [Go to Page]
- 1-7.1 Checklists
- 1-7.2 Operating Logs
- 1-7.3 Maintenance Logs
- Section 2 Viewports [Go to Page]
- 2-1 RESPONSIBILITIES [Go to Page]
- 2-1.1 Window Designer’s Responsibility
- 2-1.2 Window Fabricator’s Responsibility
- 2-1.3 Window User’s Responsibility
- 2-1.4 Quality Assurance
- 2-2 FACTORS AFFECTING SERVICE LIFE [Go to Page]
- 2-2.1 General
- 2-2.2 Physical Abuse Factors
- 2-2.3 Temperature Abuse Factors
- 2-2.4 Chemical Abuse Factors
- 2-2.5 Radiation Exposure
- 2-2.6 Cycles as Related to Above Factors
- 2-2.7 Additional Service Factors
- 2-3 HANDLING OF PVHO WINDOWS [Go to Page]
- 2-3.1 Cleaning and Polishing
- 2-3.2 Window Storage
- 2-4 OPERATIONAL AND MAINTENANCE INSPECTIONS OF PVHO VIEWPORTS [Go to Page]
- 2-4.1 General
- 2-4.2 Operational Viewport Inspection
- 2-4.3 Maintenance Viewport Inspection
- 2-4.4 Limitations on Service Life
- 2-4.5 Reinstallation of PVHO Windows
- 2-4.6 Additional Viewport Refurbishment Considerations
- 2-4.7 Instrumentation and Tools
- 2-4.8 Documentation and Record Retention
- 2-4.9 Qualification of Window Inspectors
- 2-5 CATEGORIES OF DAMAGE [Go to Page]
- 2-5.1 Superficial (Does Not Require Action)
- 2-5.2 Significant (Requires Action)
- 2-5.3 Nonrepairable (Requires Replacement)
- 2-6 REPAIR OF DAMAGED PVHO WINDOWS [Go to Page]
- 2-6.1 General
- 2-6.2 Window Damage Assessment
- 2-6.3 Repair Requirements for Spherical Windows
- 2-6.4 Annealing Severely Damaged Windows
- 2-6.5 Thickness Check
- 2-6.6 Nonconformance
- 2-6.7 Post-Repair Annealing and Pressure Testing
- 2-6.8 Marking of Repaired Windows
- 2-6.9 Pressure Test of Repaired Windows
- 2-7 MECHANICAL PROPERTY TESTING [Go to Page]
- 2-7.1 General
- 2-7.2 Validation of Minimum Acceptable Properties
- 2-7.3 Evaluation of Data for Additional Years of Service Life
- 2-7.4 Commensurate Extension of Cyclic Service Life
- 2-7.5 Additional Notes to Subsection 2-7
- 2-8 TESTING REQUIREMENTS FOR INCREASING THE 40,000-hr DESIGN LIFE
- Tables [Go to Page]
- Table 2-4.1-1 Periodic Inspection Requirements
- Table 2-4.1.1-1 Limits for Blemishes or Flaws on Standard Window Geometry Surfaces
- Table 2-4.1.1-2 Limits for Blemishes or Flaws on All Other Standard Window Geometry Surfaces
- Table 2-4.1.1-3 Limits on Chipping of Sharp Edges on Standard Window Geometries
- Table 2-4.3-1 Maximum Intervals for Maintenance Viewport Inspection
- Table 2-4.3-2 Maximum Intervals for Refurbishment
- Table IV-1-1 Specified Values of Physical Properties for Spot Casting Repairs (To Be Verified by Testing of Specimens Taken From Test Castings of the Same Slurry Batch Used in Repair)
- Table IV-1-2(a) Annealing Schedule for Acrylic Windows Part A: Minimum Heating Times for Elevated Temperature Annealing of Acrylic
- Table IV-1-2(b) Annealing Schedule for Acrylic Windows Part B: Maximum Cooling Rates for Acrylic Subjected to Elevated Annealing Temperatures
- Table VI-6-1 Example Evaluation — Mandatory Appendix VI
- Forms [Go to Page]
- Form VM-1 Viewport Inspection
- Form VM-2 Acrylic Window Repair Certification for Severely Damaged Windows
- Form VM-3 Acrylic Window Repair Certification for Slightly Damaged Windows Repaired by the User (or the User’s Authorized Agent)
- Form VT-1 Pressure Testing Report for Increasing Window Service Life Beyond the 40,000-hr Design Life
- Form IV-1-1 Material Testing Certification for Repair by Spot Casting
- Form IV-1-2 Annealing Process Certification
- Form IV-5-1 Pressure Testing Certification
- Form VI-1 Material Testing Results for Continued Service
- Form VI-2 Material Testing Evaluation for Continued Service
- MANDATORY APPENDIX I DEFINITIONS
- MANDATORY APPENDIX II REFERENCE STANDARDS AND SPECIFICATIONS
- MANDATORY APPENDIX III QUALITY ASSURANCE PROGRAM FOR REPAIR OF SEVERELY DAMAGED WINDOWS [Go to Page]
- III-1 GENERAL
- III-2 ORGANIZATION
- III-3 QUALITY ASSURANCE PROGRAM
- III-4 QUALITY ASSURANCE MANUAL
- III-5 DRAWING, DESIGN, AND SPECIFICATION CONTROL
- III-6 PROCUREMENT CONTROL
- III-7 IDENTIFICATION AND CONTROL OF ITEMS
- III-8 CONTROL OF PROCESSES
- III-9 INSPECTION
- III-10 TEST CONTROL
- III-11 HANDLING, STORAGE, AND SHIPPING
- III-12 DOCUMENTATION AND STATUS OF TEST ACTIVITIES
- III-13 CORRECTIVE ACTION
- III-14 QUALITY ASSURANCE RECORDS
- III-15 QUALITY ASSURANCE AUDITS
- III-16 CONFORMITY
- MANDATORY APPENDIX IV ADDITIONAL WINDOW REPAIR REQUIREMENTS AND FORMS [Go to Page]
- IV-1 WINDOW REPAIR TEST REQUIREMENTS
- IV-2 POST-REPAIR PRESSURE TESTING REQUIREMENT
- IV-3 TEST REJECTION CRITERIA
- IV-4 ALTERNATIVE TEST
- IV-5 TEST CERTIFICATION FORM
- MANDATORY APPENDIX V PARTIAL LIST OF HARMFUL SUBSTANCES ANDACCEPTABLE PRODUCTS [Go to Page]
- V-1 SCOPE
- V-2 HARMFUL SUBSTANCES
- V-3 ACCEPTABLE CLEANERS, BIOCIDES, AND POLISHES
- V-4 ACCEPTABLE LUBRICANTS
- V-5 ACCEPTABLE SEAL AND GASKET ADHESIVES
- MANDATORY APPENDIX VI MECHANICAL TESTING COMPUTATIONS AND FORMS [Go to Page]
- VI-1 STANDARD DEVIATION
- VI-2 STANDARD ERROR
- VI-3 CONFIDENCE INTERVAL (CI)
- VI-4 CRITERIA FOR CENSORING OF SUSPECT DATA
- VI-5 COMPUTATIONAL EXAMPLES
- VI-6 EVALUATION
- NONMANDATORY APPENDIX A CHECKLISTS AND LOGS FOR PVHO OPERATION
- NONMANDATORY APPENDIX B OPERATION OF SUBMERSIBLE CRAFT [Go to Page]
- B-1 GENERAL
- B-2 CHAIN OF COMMAND
- B-3 OPERATION, PREPARATION, AND PLANNING
- B-4 SUBMERSIBLE CRAFT PILOT
- B-5 QUALIFIED PERSONNEL
- B-6 CERTIFICATE OF COMPETENCE [Go to Page]