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ASME PVHO 1 2019

$98.04

ASME PVHO-1-2019 Safety Standard for Pressure Vessels for Human Occupancy

Published By Publication Date Number of Pages
ASME 2019 197
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This Standard provides requirements for the design, fabrication, inspection, testing, marking, and stamping of pressure vessels for human occupancy, having an internal or external pressure differential exceeding 2 psi. This Standard also provides requirements for the design, fabrication, inspection, testing, cleaning, and certification of piping systems for PVHOs. A PVHO is a pressure vessel that encloses a human being within its pressure boundary while it is under internal or external pressure that exceeds a 2 psi differential pressure. PVHOs include, but are not limited to, submersibles, diving bells, personnel transfer capsules, decompression chambers, recompression chambers, hyperbaric chambers, high altitude chambers, and medical hyperbaric oxygenation facilities. This does not include nuclear reactor containments, pressurized airplane and aerospace vehicle cabins, and caissons.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
9 FOREWORD
10 COMMITTEE ROSTER
13 CORRESPONDENCE WITH THE PVHO COMMITTEE
15 ASME PVHO-1–2019 SUMMARY OF CHANGES
18 Section 1 General Requirements
1-1 INTRODUCTION
1-2 SCOPE
1-2.1 Application
1-2.2 Geometry
1-2.3 Limitations
1-3 EXCLUSIONS
1-4 USER REQUIREMENTS
1-5 MANUFACTURER’S DATA REPORT
19 1-6 MATERIALS
1-7 DESIGN AND FABRICATION REQUIREMENTS
1-7.1 Joint Design
20 1-7.2 Welding
1-7.3 Nondestructive Testing
1-7.4 Electrical Outfitting
1-7.5 Viewports
1-7.6 Penetrations
1-7.7 Inspection
1-7.8 Testing
21 1-7.9 Documentation
1-7.10 Piping
1-7.11 Opening Reinforcements
1-7.12 Brazed or Riveted Construction
1-7.13 Alternative Design Rules for External Pressure Vessels
25 1-7.14 Hatch Design
1-7.15 Rectangular Door Design
26 1-7.16 Supports and Attachments
1-8 PRESSURE RELIEF DEVICES
1-9 MARKING
1-10 NONMETALLIC MATERIALS AND TOXICITY OFF-GAS TESTING
27 1-11 RISK ANALYSIS
1-12 LITHIUM BATTERIES
1-12.1 Scope
1-12.2 Exclusions
1-12.3 Certification
28 1-12.4 Installation
1-12.5 Battery Housings
1-12.6 Battery Management System (BMS) for Rechargeable Batteries
1-12.7 Protection for Nonrechargeable Batteries
1-12.8 Testing
29 1-12.9 Charging
1-12.10 Replacement
1-12.11 Manuals and Records
1-13 AUTOMATIC CONTROL AND SOFTWARE SAFETY
1-14 OPERATIONAL PRESSURE CYCLE
30 Forms
PVHO-1 Form GR-1 Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
31 PVHO-1 Form GR-1S Manufacturer’s Data Report Supplemantary Sheet
32 Figures
Figure 1-7.13.1-1 Geometry of Cylinders
33 Figure 1-7.13.1-2 Stiffener Geometry
Figure 1-7.13.1-3 Sections Through Rings
34 Figure 1-7.13.5-1 Values of t/Ro and Lc/Ro
35 Figure 1-9-1 Form of Nameplate, U.S. Customary Units
Figure 1-9-2 Form of Nameplate, SI Units
Tables
Table 1-10-1 Conversion Factor, Fp (for PVHO Occupation Exceeding 8 hr)
36 Section 2 Viewports
2-1 GENERAL
2-1.1 Scope
2-1.2 Exclusions
2-1.3 Certification
2-2 DESIGN
2-2.1 General
37 2-2.2 Standard Window Geometry
2-2.3 Determination of Dimensions for Standard-Geometry Windows
2-2.4 Determination of Conversion Factor by Table Method
2-2.5 Determination of Short-Term Critical Pressure
38 2-2.6 Nonstandard Window Geometries and Standard Window Geometries With Lower Conversion Factors
40 2-2.7 Design Life
41 2-2.8 Temperature and Dimensional Criteria
2-2.9 Viewport Flanges
42 2-2.10 Window Seats
2-2.11 Window Seals
43 2-2.12 Dimensional Tolerances and Surface Finish
44 2-2.13 Documentation
45 2-2.14 Windows With Inserts for Penetrators
47 2-3 MATERIAL
2-3.1 Material Restrictions
2-3.2 Laminated Sheets
2-3.3 Acrylic Bonding
2-3.4 Acrylic Requirements
2-3.5 Acrylic Form
48 2-3.6 Material Property Tests
2-3.7 Properties Test Specifications
49 2-3.8 Testing for Residual Monomer
2-3.9 Windows Greater Than 6 in. Thick
2-3.10 Bond Testing
2-3.11 Low Ultraviolet (UV) Cast Acrylic Cylinders
50 2-4 FABRICATION
2-4.1 Responsibilities and Duties for Window Fabricators
2-4.2 Quality Assurance and Marking
2-4.3 Use of Solvent
2-4.4 Identification
2-4.5 Annealing
2-4.6 Polishing
2-4.7 Inspection
2-5 INSPECTION
2-5.1 General
2-5.2 Inspection Temperature and Orientation
2-5.3 Surface Scratches
51 2-5.4 Inclusion Inspection
2-5.5 Scratch Characterizations
52 2-5.6 Repairs
2-5.7 Inspection Report
2-6 MARKING
2-6.1 Marking Location, Configurations
2-6.2 Certification Completion
2-6.3 Marking Restrictions
2-6.4 Additional Marking
2-6.5 Marking Certification Retention
53 2-7 PRESSURE TESTING
2-7.1 Frequency
2-7.2 Test Configuration
2-7.3 Test Duration
2-7.4 Test Temperature
2-7.5 Window Leakage
2-7.6 Post-Test Inspection
2-7.7 Rejection Criteria
2-7.8 Alternate Test Procedure
2-7.9 Reporting Requirements
2-7.10 Records Retention
2-8 INSTALLATION OF WINDOWS IN CHAMBERS
2-8.1 Cleaning
54 2-8.2 Lubrication
2-8.3 Assembly
2-9 REPAIR OF DAMAGED WINDOWS PRIOR TO BEING PLACED IN SERVICE
2-9.1 General
2-9.2 Damaged Window Criteria
2-9.3 Dimensional Assessment
2-9.4 Damage Severity Determination
2-9.5 Slightly Damaged Windows
2-9.6 Repairs of Slightly Damaged Windows
2-9.7 Repair of Severely Damaged Windows
55 2-9.8 Repair of Spherical Window by Spot Casting
2-10 GUIDELINES FOR APPLICATION OF THE REQUIREMENTS OF SECTION 2
2-10.1 Introduction
2-10.2 Sample Design Procedures
56 2-10.3 Sample Purchase Specification and Product Reviews
2-10.4 Sample Pressure Test Instructions
2-10.5 Sample Calculations
58 PVHO-1 Form VP-1 Fabrication Certification for Acrylic Windows
59 PVHO-1 Form VP-2 Acrylic Window Design Certification
60 Figure 2-2.2.1-1 Standard Window Geometries — Part 1
61 Figure 2-2.2.1-2 Standard Window Geometries — Part 2
62 Figure 2-2.2.1-3 Standard Window Geometries — Part 3
63 Figure 2-2.2.1-4 Standard Window Geometries — Part 4
Table 2-2.3.1-1 Conversion Factors for Acrylic Flat Disk Windows
64 Table 2-2.3.1-2 Conversion Factors for Acrylic Conical Frustum Windows and Double-Beveled Disk Windows
Table 2-2.3.1-3 Conversion Factors for Acrylic Spherical Sector Windows With Conical Edge, Hyperhemispherical Windows With Conical Edge, and NEMO-Type Windows With Conical Edge
65 Table 2-2.3.1-4 Conversion Factors for Acrylic Spherical Sector Windows With Square Edge and Hemispherical Windows With Equatorial Flange
Table 2-2.3.1-5 Conversion Factors for Acrylic Cylindrical Windows
66 Figure 2-2.5.1-1 Short-Term Critical Pressure of Flat Disk Acrylic Windows — Part 1
Table 2-2.3.2-1 Conical Frustum Windows for Design Pressures in Excess of 10,000 psi (69 MPa)
67 Figure 2-2.5.1-2 Short-Term Critical Pressure of Flat Disk Acrylic Windows — Part 2
68 Figure 2-2.5.1-3 Short-Term Critical Pressure of Flat Disk Acrylic Windows — Part 3
69 Figure 2-2.5.1-4 Short-Term Critical Pressure of Conical Frustum Acrylic Windows — Part 1
70 Figure 2-2.5.1-5 Short-Term Critical Pressure of Conical Frustum Acrylic Windows — Part 2
71 Figure 2-2.5.1-6 Short-Term Critical Pressure of Spherical Sector Acrylic Windows — Part 1
72 Figure 2-2.5.1-7 Short-Term Critical Pressure of Spherical Sector Acrylic Windows — Part 2
73 Figure 2-2.5.1-8 Short-Term Critical Pressure of Cylindrical Acrylic Windows Pressurized Internally — Part 1
74 Figure 2-2.5.1-9 Short-Term Critical Pressure of Cylindrical Acrylic Windows Pressurized Internally — Part 2
75 Figure 2-2.5.1-10 Short-Term Critical Pressure of Cylindrical Acrylic Windows Pressurized Externally
76 Figure 2-2.5.1-11 Short-Term Elastic Buckling of Cylindrical Acrylic Windows Between Supports Under External Hydrostatic Pressure — Part 1
77 Figure 2-2.5.1-12 Short-Term Elastic Buckling of Cylindrical Acrylic Windows Between Supports Under External Hydrostatic Pressure — Part 2
78 Figure 2-2.5.1-13 Short-Term Elastic Buckling of Cylindrical Acrylic Windows Between Supports Under External Hydrostatic Pressure — Part 3
79 Figure 2-2.5.1-14 Short-Term Critical Pressure of Hyperhemispherical and NEMO-Type Acrylic Windows — Part 1
80 Figure 2-2.5.1-15 Short-Term Critical Pressure of Hyperhemispherical and NEMO-Type Acrylic Windows — Part 2
81 Figure 2-2.10.1-1 Seat Cavity Requirements — Conical Frustum Window, Spherical Sector Window With Conical Edge, and Flat Disk Window
82 Figure 2-2.10.1-2 Seat Cavity Requirements — Double-Beveled Disk Window
83 Figure 2-2.10.1-3 Seat Cavity Requirements — Spherical Sector Window With Square Edge
84 Figure 2-2.10.1-4 Seat Cavity Requirements — Hemispherical Window With Equatorial Flange
85 Figure 2-2.10.1-5 Seat Cavity Requirements — Cylindrical Window
86 Figure 2-2.10.1-6 Seat Cavity Requirements — Hyperhemispherical Window
87 Figure 2-2.10.1-7 Seat Cavity Requirements — NEMO Window (Standard Seat)
88 Figure 2-2.10.1-8 Seat Cavity Requirements — NEMO Window (Seat With Extended Cyclic Fatigue Life)
89 Figure 2-2.11.10-1 Bevels on Window Edges — Flat Disk Windows, Conical Frustum Windows, Spherical Sector Windows, Hyperhemispheres
90 Figure 2-2.11.10-2 Bevels on Window Edges — Flanged Hemispherical Window, Spherical Sector Window With Square Edge, External Pressure and Internal Pressure of Cylindrical Windows
91 Figure 2-2.11.11-1 Acceptable Configurations for Clear Viewport Retaining Covers
92 Figure 2-2.14.11-1 Dimensional Tolerances for Penetrations in Acrylic Windows
93 Table 2-2.14.13-1 Specified Values of Physical Properties for Polycarbonate Plastic
Table 2-2.14.13-2 Specified Values of Physical Properties for Cast Nylon Plastic
94 Figure 2-2.14.15-1 Dimensional Tolerances for Inserts in Acrylic Windows
95 Figure 2-2.14.16-1 Typical Shapes of Inserts
96 Figure 2-2.14.22-1 Seal Configurations for Inserts in Acrylic Windows
97 Figure 2-2.14.24-1 Restraints for Inserts in Acrylic Windows
98 Table 2-3.4-1 Specified Values of Physical Properties for Each Lot
99 PVHO-1 Form VP-3 Material Manufacturer’s Certification for Acrylic
100 Table 2-3.4-2 Specified Values of Physical Properties for Each Casting
101 PVHO-1 Form VP-4 Material Testing Certification for Acrylic
102 Table 2-4.5-1 Annealing Schedule for Acrylic Windows
103 PVHO-1 Form VP-5 Pressure Testing Certification
104 PVHO-1 Form VP-6 Acrylic Window Repair Certification
105 Section 3 Quality Assurance for PVHO Manufacturers
3-1 GENERAL
3-1.1 Scope
3-1.2 Quality Assurance System Verification
3-2 RESPONSIBILITIES
3-2.1 Compliance With This Standard
3-2.2 Documentation of the Quality Assurance Program
3-2.3 Certification
3-2.4 Right of Access
3-2.5 Records
106 Section 4 Piping Systems
4-1 GENERAL
4-1.1 Scope
4-1.2 Design and Fabrication
4-2 MATERIAL REQUIREMENTS
4-2.1 Acceptable Materials
107 4-2.2 Limitations on Materials
4-2.3 Lubricants and Sealants
4-2.4 Nonmetallic Materials
108 4-3 DESIGN OF COMPONENTS
4-3.1 Straight Piping Under External Pressure
4-3.2 Straight Piping Under Internal Pressure
109 4-3.3 Bending of Pipe and Tube
4-3.4 Stress Analysis of Piping Components
4-3.5 Pressure Design of Fabricated Joints and Intersections
4-3.6 Pressure Design of Bolted Flanges and Blanks
4-3.7 Design of Penetrations Through the Pressure Boundaries of PVHOs
4-4 SELECTION AND LIMITATIONS OF PIPING COMPONENTS
4-4.1 Pressure Requirements
4-4.2 Valves
110 4-4.3 Filters
4-4.4 Mufflers
4-5 SELECTION AND LIMITATIONS OF PIPING JOINTS
4-5.1 Welded Joints
4-5.2 Brazed Joints
4-5.3 Mechanical Joints
4-5.4 Threaded Joints
111 4-5.5 Joints and Fittings in Tubes
4-6 SUPPORTS
4-7 INSPECTION
4-7.1 Inspection of Welded Joints
4-7.2 Inspection of Brazed Joints
112 4-8 TESTING
4-8.1 Hydrostatic Tests
4-8.2 Pneumatic Tests
4-8.3 Leak Testing
4-9 SYSTEMS
113 4-9.1 System Design Requirements
4-9.2 Pressurization and Depressurization Systems
4-9.3 Pressure Boundary Valve Requirements
114 4-9.4 Depth Gauges
4-9.5 Pressure Gauges Other Than Depth Gauges
4-9.6 Breathing Gas Systems
4-9.7 Pressure Control Valves
115 4-9.8 Pressure Relief Requirements
116 4-9.9 Color Coding
4-9.10 Labeling
4-9.11 Soft Goods
4-9.12 Lubricants and Sealants
4-9.13 Cleaning Requirements
117 4-9.14 Off-Gassing Test for Hoses Used for Breathing Gas Service
118 Table 4-2.1.1-1 Maximum Allowable Stress Values for Seamless Pipe and Tube Materials Not Listed in Nonmandatory Appendix A of ASME B31.1
Table 4-7.1-1 Mandatory Minimum Nondestructive Examinations for Pressure Welds in Piping Systems for Pressure Vessels for Human Occupancy
119 Figure 4-9.14.2-1 Flow Diagram of Apparatus for Measuring the Concentration of Hydrocarbons in a Stream of Air or Other Gas After It Has Passed Through a Test Hose
Table 4-9.14.2-1 Maximum Allowable Concentration of Hydrocarbons in Air Passing Through Hose
120 Section 5 Medical Hyperbaric Systems
5-1 GENERAL
5-1.1 Scope
5-1.2 User’s Design Specification
5-1.3 Documentation
5-1.4 Viewports
5-1.5 Quick-Actuating Closures
5-1.6 Personnel Entry Lock
5-1.7 Penetrations
5-1.8 Personnel Egress
121 5-1.9 Medical-Use PVHO Certifications
5-2 PVHO SYSTEM DESIGN
5-3 GAS SYSTEMS
5-3.1 Gas Storage Requirements
5-3.2 Breathing Devices
5-3.3 Breathing Gas Outlets
5-4 CONTROL SYSTEMS AND INSTRUMENTATION
5-4.1 Controls Location
5-4.2 Communications
5-5 ENVIRONMENTAL SYSTEMS
5-5.1 Environmental Conditions
5-5.2 Temperature
5-5.3 Humidity
5-5.4 Contaminants
5-5.5 Lighting
122 5-5.6 External Heat Sources
5-5.7 Access to Emergency Equipment
5-5.8 Suction Systems
5-5.9 Accidental Depressurization
123 Section 6 Diving Systems
6-1 GENERAL
6-1.1 Scope
6-1.2 User’s Design Specification
6-1.3 Design Certification
6-1.4 Documentation
124 6-1.5 Useful References
6-2 DESIGN
6-2.1 General
6-2.2 Design Loads
6-2.3 Environmental Requirements
6-2.4 Corrosion
6-2.5 External Pressure Rating
6-2.6 Impact Protection
6-2.7 Buoyancy
6-2.8 Occupant Requirements
125 6-2.9 Lubricants and Sealants
6-2.10 Material Toxicity (Including Paints)
6-2.11 Emergency Recovery of Diving Bells
6-3 PRESSURE BOUNDARY
6-3.1 Personnel Access Doors/Hatches
126 6-3.2 Medical/Service Locks
6-3.3 Closures
6-3.4 Quick-Acting Closures for Diving Bells and Hyperbaric Evacuation Systems
6-3.5 Trunks and Tunnels
127 6-3.6 Viewports
6-3.7 Lighting Devices
6-3.8 Service Penetrators
6-3.9 Electrical Penetrators
6-3.10 Fiber-Optic Penetrators
6-4 SYSTEMS
6-4.1 Life-Support Systems
129 6-4.2 Sanitary Systems
6-4.3 Electrical Systems
131 6-4.4 Lighting Systems
6-4.5 Communication Systems
6-4.6 Fire Protection and Detection Systems
6-5 HANDLING SYSTEMS
6-5.1 General
6-5.2 Design
132 6-5.3 Test and Trials
6-6 HYPERBARIC EVACUATION SYSTEMS
6-6.1 General
6-6.2 Hyperbaric Evacuation Unit User Requirements
133 6-6.3 Life-Support Package (LSP)
134 6-6.4 Hyperbaric Evacuation Launch Systems
6-7 TESTING AND TRIALS
6-7.1 System Pressure Tests
6-7.2 System Functional Tests
135 Figure 6-6.2.2-1 Placement and Design of Markings for Hyperbaric Evacuation Units Designed to Float in Water
Figure 6-6.2.2-2 Markings for Hyperbaric Evacuation Units Designed to Float in Water
136 Section 7 Submersibles
7-1 GENERAL
7-1.1 Scope
7-1.2 General Requirements
7-1.3 User’s Design Specification
7-1.4 Design Certification
7-1.5 Documentation
137 7-1.6 Operations Manual
7-2 PRESSURE BOUNDARY
7-2.1 General
7-2.2 Hatches
7-2.3 Viewports
7-2.4 Penetrators
138 7-3 PIPING
7-3.1 Exceptions and Alternatives
7-3.2 Internal and External Pressures
7-3.3 Ambient Pressure
7-3.4 Inaccessible Spaces
7-3.5 Hull Valves
7-3.6 Plug Valves
7-3.7 Pressure Containers
7-4 ELECTRICAL SYSTEMS
7-4.1 General
139 7-4.2 Power Supplies
7-4.3 Electrical Cables
7-4.4 Battery Compartments
7-4.5 Emergency Lighting
7-5 LIFE SUPPORT
7-5.1 General
7-5.2 Main Life Support
7-5.3 Emergency Life Support
140 7-5.4 Consumption Rates
7-5.5 Oxygen Systems and Storage
7-5.6 Monitoring
7-6 FIRE PROTECTION
7-6.1 Materials
7-6.2 Toxicity
7-6.3 Smoke Detectors
7-6.4 Extinguishers
7-7 NAVIGATION
7-7.1 General
7-7.2 Propulsion
7-7.3 Depth Gauges
7-7.4 Depth Alarm
141 7-7.5 Obstacle Avoidance
7-7.6 Surfaced Detection
7-7.7 Submerged Detection
7-8 COMMUNICATIONS
7-8.1 General
7-8.2 VHF Radio
7-8.3 Underwater Telephone (UWT)
7-8.4 Pinger
7-9 INSTRUMENTATION
7-9.1 General
7-9.2 Water Intrusion
7-9.3 Power Levels
7-9.4 Voltage and Current Meters
7-9.5 Ground Faults
7-9.6 Ballast Water
7-10 BUOYANCY, STABILITY, EMERGENCY ASCENT, AND ENTANGLEMENT
7-10.1 General
7-10.2 Underwater Operation
142 7-10.3 Surfacing
7-10.4 Jettisoning System
7-10.5 Entanglement
7-11 EMERGENCY EQUIPMENT
7-11.1 Life Jackets
7-11.2 First Aid Kit
7-11.3 Thermal Protection
7-11.4 Rations
7-11.5 Tow Point
143 MANDATORY APPENDICES
MANDATORY APPENDIX I REFERENCE CODES, STANDARDS, AND SPECIFICATIONS
145 MANDATORY APPENDIX II DEFINITIONS
151 NONMANDATORY APPENDICES
NONMANDATORY APPENDIX A DESIGN OF SUPPORTS AND LIFTING ATTACHMENTS
152 NONMANDATORY APPENDIX B RECOMMENDATIONS FOR THE DESIGN OF THROUGH-PRESSURE BOUNDARY PENETRATIONS
153 Figure B-2-1 Acceptable Weld Nozzle Penetrators
154 Figure B-3-1 Acceptable Threads and Inserts
155 Table C-1 U.S. Navy Color Codes
Table C-2 IMO Color Codes
NONMANDATORY APPENDIX C RECOMMENDED PRACTICES FOR COLOR CODING AND LABELING
156 NONMANDATORY APPENDIX D GUIDELINES FOR THE SUBMISSION OF A CASE FOR THE USE OF NONSTANDARD DESIGNS, MATERIALS, AND CONSTRUCTION FOR NON-FLEXIBLE PVHO CHAMBER FABRICATION
162 Table D-7.1-1 Tabulated Data for Performance of “W-Test” for Normality of Data Set
163 NONMANDATORY APPENDIX E GUIDELINES FOR PREPARING A PERFORMANCE-BASED CASE FOR FLEXIBLE PVHO CHAMBERS AND SYSTEMS
176 Table E-1.1-1 Compliance Matrix for ASME PVHO-1 Cases
190 Figure E-3.3.1-1 Cook’s Diagram: Atmosphere of Increased Burning Rate
191 Figure E-5.2.2.1-1 Number of Test Samples Required for Alternate Creep Test Procedure
192 Figure E-5.2.5.1-1 Time Versus Test Temperature for Accelerated Aging Test
193 NONMANDATORY APPENDIX F USEFUL REFERENCES
ASME PVHO 1 2019
$98.04