This Standard provides technical criteria and guidelines for the operation and maintenance of PVHOs and PVHO systems that were designed, constructed, tested and certified in accordance with ASME PVHO-1. (b) This Standard provides technical criteria for the user to establish the serviceability of a PVHO acrylic window under its specific environmental service conditions. Windows in protected environments as well as those in severe environments are addressed. Judicious use of this Standard will allow the user and\/or the jurisdictional authority to determine when a PVHO acrylic window requires replacement.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | COMMITTEE ROSTER <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | CORRESPONDENCE WITH THE PVHO COMMITTEE <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | SUMMARY OF CHANGES <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Section 1 General 1-1 INTRODUCTION AND SCOPE 1-2 RESPONSIBILITIES AND JURISDICTIONAL CONSIDERATIONS 1-2.1 User\u0152s Responsibilities 1-2.2 Jurisdictional Considerations 1-3 IN-SERVICE EVALUATIONS, REPAIRS, AND MODIFICATION OF PVHOs 1-3.1 In-Service PVHO Evaluation and Testing <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 1-3.2 PVHO Windows and Viewports 1-3.3 Pressure Boundary Except for Windows 1-4 PVHO AND PVHO SYSTEMS DOCUMENTATION 1-5 OWNER\u0152S MANUAL 1-5.1 General 1-5.2 Component Description 1-5.3 Storage of Equipment <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 1-6 MAINTENANCE REQUIREMENTS 1-6.1 General <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Section 2 Viewports 2-1 RESPONSIBILITIES 2-1.1 Window Designer\u0152s Responsibility 2-1.2 Window Fabricator\u0152s Responsibility 2-1.3 Window User\u0152s Responsibility 2-1.4 Quality Assurance 2-2 FACTORS AFFECTING SERVICE LIFE 2-2.1 General 2-2.2 Physical Abuse Factors 2-2.3 Temperature Abuse Factors 2-2.3.1 Heat Sources. 2-2.3.2 Improper Operation of Lighting Equipment. 2-2.4 Chemical Abuse Factors <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 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 2-3.1 Cleaning and Polishing 2-3.1.1 Correct Methods. 2-3.1.2 Incorrect Methods. 2-3.2 Window Storage <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 2-4 OPERATIONAL AND MAINTENANCE INSPECTIONS OF PVHO VIEWPORTS 2-4.1 General 2-4.1.1 Scope. 2-4.2 Operational Viewport Inspection 2-4.2.1 Operational Viewport Inspection Schedule. 2-4.3 Maintenance Viewport Inspection Tables Table 2-4.1-1 Periodic Inspection Requirements <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Table 2-4.1-2 Limits for Blemishes or Flaws on Window Surfaces <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Table 2-4.1-3 Limits for Blemishes or Flaws on All Other Window Surfaces <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Table 2-4.1-4 Limits on Chipping of Sharp Edges on Windows <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 2-4.3.1 Maintenance Viewport Inspection Schedule. Table 2-4.3-1 Maximum Intervals for Maintenance Viewport Inspection Table 2-4.3-2 Maximum Intervals for Refurbishment <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 2-4.9 Qualification of Window Inspectors 2-4.9.1 Procedure and Levels of Qualification. 2-4.9.2 Use of Third Parties. 2-5 CATEGORIES OF DAMAGE 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 2-6.1 General 2-6.2 Window Damage Assessment <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 2-6.2.1 Slightly Damaged Windows 2-6.2.1.1 Field Repair of Slightly Damaged Windows. 2-6.2.2 Severely Damaged Windows. 2-6.2.3 Repair of Severely Damaged Windows. 2-6.3 Repair Requirements for Spherical Windows <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 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 2-7.1 General 2-7.2 Validation of Minimum Acceptable Properties <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Forms PVHO-2 Form VP-1 Viewport Inspection <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | PVHO-2 Form VP-2 Acrylic Window Repair Certification for Windows Repaired by the User <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | PVHO-2 Form VP-3 Acrylic Window Repair Certification for Severely Damaged Windows <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | MANDATORY APPENDIX I DEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | MANDATORY APPENDIX II REFERENCE STANDARDS AND SPECIFICATIONS <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | MANDATORY APPENDIX III QUALITY ASSURANCE PROGRAM FOR REPAIR OF SEVERELY DAMAGED WINDOWS 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 <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | III-15 QUALITY ASSURANCE AUDITS III-16 CONFORMITY <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | MANDATORY APPENDIX IV ADDITIONAL WINDOW REPAIR REQUIREMENTS AND FORMS IV-1 WINDOW REPAIR TEST REQUIREMENTS IV-2 POST-REPAIR PRESSURE TESTING REQUIREMENT <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Table IV-1-2(b) Annealing Schedule for Acrylic Windows Part B: Maximum Cooling Rates for Acrylic Subjected to Elevated Annealing Temperatures IV-3 TEST REJECTION CRITERIA IV-4 ALTERNATIVE TEST IV-5 TEST CERTIFICATION FORM <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | PVHO-2 Form IV-1-1 Material Testing Certification for Repair by Spot Casting <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | PVHO-2 Form IV-1-2 Annealing Process Certification <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | PVHO-2 Form IV-5-1 Pressure Testing Certification <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | MANDATORY APPENDIX V PARTIAL LIST OF HARMFUL SUBSTANCES AND ACCEPTABLE PRODUCTS V-1 SCOPE V-2 HARMFUL SUBSTANCES V-3 ACCEPTABLE CLEANERS, BIOCIDES, AND POLISHES V-3.1 Acceptable Cleaners <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | V-3.2 Acceptable Biocides V-3.3 Acceptable Polishes V-4 ACCEPTABLE LUBRICANTS V-5 ACCEPTABLE SEAL AND GASKET ADHESIVES <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | MANDATORY APPENDIX VI MECHANICAL TESTING COMPUTATIONS AND FORMS 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 <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Table VI-6-1 Example Evaluation \u2014 Externally Pressurized Manned Submersible After 10 Years of Service <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | PVHO-2 Form VI-1 Material Testing Certification for Continued Service <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | PVHO-2 Form VI-2 Material Testing Evaluation for Continued Service <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | NONMANDATORY APPENDIX A CHECKLISTS AND LOGS FOR PVHO OPERATION A-1 INTRODUCTION A-2 CHECKLISTS A-2.1 Preoperation Checklists A-2.2 Post-Operation Checklists A-2.3 Prestorage Checklists A-3 OPERATING LOGS A-4 MAINTENANCE LOGS <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | NONMANDATORY APPENDIX B OPERATION OF SUBMERSIBLE CRAFT B-1 GENERAL B-1.1 B-1.2 B-1.3 B-2 CHAIN OF COMMAND B-2.1 B-3 OPERATION, PREPARATION, AND PLANNING B-3.1 Operating Manual B-3.2 Emergency Response Plan B-3.3 Emergency Drills B-3.4 Maintenance Manual B-3.5 <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | B-4 SUBMERSIBLE CRAFT PILOT B-4.1 B-5 QUALIFIED PERSONNEL B-5.1 Introduction B-5.1.1 Life Support. B-5.1.2 Buoyancy and Stability. B-5.1.3 Navigation. B-5.1.4 Communications. B-5.1.5 Power Sources and Electrical Arrangements. B-5.1.6 Emergency Planning. B-5.1.7 Personnel Responsibilities. B-5.1.8 Practical and Operational Training. B-6 CERTIFICATE OF COMPETENCE B-6.1 Introduction B-6.2 Definitions <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | ASME PVHO-2 CASES <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" ASME PVHO-2 – 2016: Safety Standard for Pressure Vessels for Human Occupancy: In-Service Guidelines<\/b><\/p>\n |