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ASME PVHO 1 2016

ASME PVHO 1 2016

$98.04

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

Published By Publication Date Number of Pages
ASME 2016
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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
5 FIGURES
6 TABLES
7 Forms
8 FOREWORD
9 COMMITTEE ROSTER
11 CORRESPONDENCE WITH THE PVHO COMMITTEE
13 ASME PVHO-1-2016 SUMMARY OF CHANGES
16 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
17 1-5 MANUFACTURER’S DATA REPORT
1-6 MATERIALS
1-7 DESIGN AND FABRICATION REQUIREMENTS
1-7.1 Joint Design
18 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
19 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
1-7.13.1 General.
20 PVHO-1 Form GR-1 Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
21 PVHO-1 Form GR-1S Manufacturer’s Data Report Supplementary Sheet
22 Fig. 1-7.13.1-1 Geometry of Cylinders
23 Fig. 1-7.13.1-2 Stiffener Geometry
Fig. 1-7.13.1-3 Sections Through Rings
24 1-7.13.2 Nomenclature
25 1-7.13.3 Materials
1-7.13.4 Stiffened and Unstiffened Cylinders
26 1-7.13.5 Minimum Required Thickness for Unstiffened Spheres and Formed Heads
27 Fig. 1-7.13.5-1 Values of t/Ro and Lc/Ro
28 1-7.13.6 Pressure Testing for Alternative Design Rules.
1-7.14 Hatch Design
1-7.15 Rectangular Door Design
1-7.16 Supports and Attachments
1-8 PRESSURE RELIEF DEVICES
1-9 MARKING
29 1-10 NONMETALLIC MATERIALS AND TOXICITY OFF-GAS TESTING
Fig. 1-9-1 Form of Nameplate, U.S. Customary
Fig. 1-9-2 Form of Nameplate, Metric
30 1-11 RISK ANALYSIS
Table 1-10-1 Conversion Factor, Fp (for PVHO Occupation Exceeding 8 hr)
31 Section 2 Viewports
2-1 GENERAL
2-1.1 Scope
2-1.2 Exclusions
2-1.3 Certification
2-1.3.1 Traceability.
2-1.3.2 Additional Requirements.
2-2 DESIGN
2-2.1 General
2-2.2 Standard Window Geometry
2-2.2.1 Configuration.
32 PVHO-1 Form VP-1 Fabrication Certification for Acrylic Windows
33 Fig. 2-2.2.1-1 Standard Window Geometries — Part 1
34 Fig. 2-2.2.1-2 Standard Window Geometries — Part 2
35 Fig. 2-2.2.1-3 Standard Window Geometries — Part 3
36 Fig. 2-2.2.1-4 Standard Window Geometries — Part 4
37 2-2.2.2 Calculation.
2-2.2.3 Tests.
2-2.3 Determination of Dimensions for Standard-Geometry Windows
2-2.3.1 0 psi to 10,000 psi.
2-2.3.2 10,000 psi to 20,000 psi.
2-2.4 Determination of Conversion Factor by Table Method
2-2.4.1 Temperature.
2-2.4.2 Pressure.
2-2.4.3 Values of Conversion Factors.
2-2.5 Determination of Short-Term Critical Pressure
2-2.5.1 Calculation Method.
38 Table 2-2.3.1-1 Conversion Factors for Acrylic Flat Disk Windows
Table 2-2.3.1-2 Conversion Factors for Acrylic Conical Frustum Windows and Double Beveled Disk Windows
39 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
Table 2-2.3.1-4 Conversion Factors for Acrylic Spherical Sector Windows With Square Edge and Hemispherical Windows With Equatorial Flange
40 Table 2-2.3.1-5 Conversion Factors for Acrylic Cylindrical Windows
Table 2-2.3.2-1 Conical Frustum Windows for Design Pressures in Excess of 10,000 psi (69 MPa)
41 Fig. 2-2.5.1-1 Short-Term Critical Pressure of Flat Disk Acrylic Windows — Part 1
42 Fig. 2-2.5.1-2 Short-Term Critical Pressure of Flat Disk Acrylic Windows — Part 2
43 Fig. 2-2.5.1-3 Short-Term Critical Pressure of Flat Disk Acrylic Windows — Part 3
44 Fig. 2-2.5.1-4 Short-Term Critical Pressure of Conical Frustum Acrylic Windows — Part 1
45 Fig. 2-2.5.1-5 Short-Term Critical Pressure of Conical Frustum Acrylic Windows — Part 2
46 Fig. 2-2.5.1-6 Short-Term Critical Pressure of Spherical Sector Acrylic Windows — Part 1
47 Fig. 2-2.5.1-7 Short-Term Critical Pressure of Spherical Sector Acrylic Windows — Part 2
48 2-2.5.2 Testing Method.
2-2.6 Nonstandard Window Geometries and Standard Window Geometries With Lower Conversion Factors
2-2.6.1 Case Submittal Procedure.
2-2.6.2 Use in Standard PVHOs.
2-2.6.3 Testing Criteria.
49 Fig. 2-2.5.1-8 Short-Term Critical Pressure of Cylindrical Acrylic Windows Pressurized Internally — Part 1
50 Fig. 2-2.5.1-9 Short-Term Critical Pressure of Cylindrical Acrylic Windows Pressurized Internally — Part 2
51 Fig. 2-2.5.1-10 Short-Term Critical Pressure of Cylindrical Acrylic Windows Pressurized Externally
52 Fig. 2-2.5.1-11 Short-Term Elastic Buckling of Cylindrical Acrylic Windows Between Supports Under External Hydrostatic Pressure — Part 1
53 Fig. 2-2.5.1-12 Short-Term Elastic Buckling of Cylindrical Acrylic Windows Between Supports Under External Hydrostatic Pressure — Part 2
54 Fig. 2-2.5.1-13 Short-Term Elastic Buckling of Cylindrical Acrylic Windows Between Supports Under External Hydrostatic Pressure — Part 3
55 Fig. 2-2.5.1-14 Short-Term Critical Pressure of Hyperhemispherical and NEMO-Type Acrylic Windows — Part 1
56 Fig. 2-2.5.1-15 Short-Term Critical Pressure of Hyperhemispherical and NEMO-Type Acrylic Windows — Part 2
57 2-2.6.4 STPP Test Procedure.
2-2.6.5 LTPP Test Procedure.
2-2.6.6 CPP Test Procedure.
2-2.6.7 Test Temperature Criteria.
2-2.6.8 Fixturing.
2-2.6.9 Scaling.
58 2-2.7 Design Life
2-2.7.1 General.
2-2.7.2 Flat Disk Windows.
2-2.7.3 Conical Frustum Windows.
2-2.7.4 Double Beveled Disk Windows.
2-2.7.5 Spherical Sector With Conical Edge, Hyperhemisphere With Conical Edge, and NEMO-Type Windows With Conical Edge Penetrations.
2-2.7.6 Spherical Sector Windows With Square Edge and Hemispherical Windows with Equatorial Flange.
2-2.7.7 Cylindrical Windows for Internal Pressure Applications.
2-2.7.8 Cylindrical Windows for External Pressure Applications.
2-2.7.9 Increase in Cyclic Design Life.
59 2-2.8 Temperature and Dimensional Criteria
2-2.8.1 Thermal Expansion.
2-2.8.2 Shape and Sealing Arrangement.
2-2.8.3 Clearance Criteria.
2-2.8.4 Window and Seat Diameter.
2-2.9 Viewport Flanges
2-2.9.1 Contribution of Window to Reinforcement.
2-2.9.2 Calculation Method.
2-2.9.3 Reinforcement.
2-2.9.4 Requirements for Large Openings.
2-2.10 Window Seats
2-2.10.1 Dimensional Requirements.
2-2.10.2 Surface Finish.
2-2.10.3 Corrosion Mitigation.
2-2.11 Window Seals
2-2.11.1 General Requirements.
60 Fig. 2-2.10.1-1 Seat Cavity Requirements — Conical Frustum Window, Spherical Sector Window With Conical Edge, and Flat Disk Window
61 Fig. 2-2.10.1-2 Seat Cavity Requirements — Double Beveled Disk Window
62 Fig. 2-2.10.1-3 Seat Cavity Requirements — Spherical Sector Window With Square Edge
63 Fig. 2-2.10.1-4 Seat Cavity Requirements — Hemispherical Window With Equatorial Flange
64 Fig. 2-2.10.1-5 Seat Cavity Requirements — Cylindrical Window
65 Fig. 2-2.10.1-6 Seat Cavity Requirements — Hyperhemispherical Window
66 Fig. 2-2.10.1-7 Seat Cavity Requirements — NEMO Window (Standard Seat)
67 Fig. 2-2.10.1-8 Seat Cavity Requirements — NEMO Window (Seat With Extended Cyclic Fatigue Life)
68 2-2.11.2 Flat Disk Windows.
2-2.11.3 Retainer Rings.
2-2.11.4 Gasket Compression.
2-2.11.5 Electrogalvanic Requirements.
2-2.11.6 Retainer Ring Design Factor.
2-2.11.7 Minimum Compression.
2-2.11.8 Secondary Seal.
2-2.11.9 Seal Ring Grooves
2-2.11.10 Edge Seals.
2-2.11.11 Clear Viewport Retaining Covers.
69 Fig. 2-2.11.10-1 Bevels on Window Edges — Flat Disk Windows, Conical Frustum Windows, Spherical Sector Windows, Hyperhemispheres
70 Fig. 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
71 2-2.11.12 Configurations.
2-2.11.13 Replacement Windows.
2-2.12 Dimensional Tolerances and Surface Finish
2-2.12.1 Thickness.
2-2.12.2 Conical Windows
2-2.12.3 Spherical Sector Windows.
2-2.12.4 Flat Disk Windows
2-2.12.4.1 Window External Diameter.
2-2.12.4.2 Seat Cavity Diameter.
72 Fig. 2-2.11.11-1 Acceptable Configurations for Clear Viewport Retaining Covers
73 2-2.12.5 Spherical Windows
2-2.12.6 Cylindrical Windows.
2-2.12.7 Surface Finish.
2-2.12.8 Viewing Surface.
2-2.12.9 Other Surfaces.
2-2.13 Documentation
2-2.13.1 Drawing Requirements.
2-2.13.2 Window Identification.
2-2.13.3 Design Certification.
2-2.13.4 Drawing Transmittal.
2-2.14 Windows With Inserts for Penetrators
2-2.14.1 General.
2-2.14.2 Shape Limitations.
2-2.14.3 Penetration Limitations.
74 PVHO-1 Form VP-2 Acrylic Window Design Certification
75 2-2.14.4 Penetration Locations (Spherical Shell Sector).
2-2.14.5 Penetration Location (Hemispheres).
2-2.14.6 Penetration Configuration.
2-2.14.7 Area of Single Penetration.
2-2.14.8 Total Area.
2-2.14.9 Seats.
2-2.14.10 Included Angle.
2-2.14.11 Maximum Diameter.
2-2.14.12 Tolerances.
2-2.14.13 Insert Material.
2-2.14.14 Temperature Considerations.
2-2.14.15 Insert Tolerances.
2-2.14.16 Insert Shape.
2-2.14.17 Metal Inserts.
2-2.14.18 Polycarbonate Inserts.
2-2.14.19 Acrylic Inserts.
76 Fig. 2-2.14.11-1 Dimensional Tolerances for Penetrations in Acrylic Windows
77 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
78 Fig. 2-2.14.15-1 Dimensional Tolerances for Inserts in Acrylic Windows
79 Fig. 2-2.14.16-1 Typical Shapes of Inserts
80 2-2.14.20 Insert Thickness.
2-2.14.21 Duplicate Inserts.
2-2.14.22 Insert Seals.
2-2.14.23 Insert Seal Grooves.
2-2.14.24 Insert Retention.
2-2.14.25 Insert Stress Relief.
2-2.14.26 Insert Inspection.
2-2.14.27 Insert Pressure Test.
2-2.14.28 Insert Inspection.
2-2.14.29 Insert Certification Procedure.
81 Fig. 2-2.14.22-1 Seal Configurations for Inserts in Acrylic Windows
82 Fig. 2-2.14.24-1 Restraints for Inserts in Acrylic Windows
83 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
2-3.6 Material Property Tests
84 Table 2-3.4-1 Specified Values of Physical Properties for Each Lot
85 2-3.7 Properties Test Specifications
PVHO-1 Form VP-3 Material Manufacturer’s Certification for Acrylic
86 Table 2-3.4-2 Specified Values of Physical Properties for Each Casting
87 PVHO-1 Form VP-4 Material Testing Certification for Acrylic
88 2-3.8 Testing for Unpolymerized Acrylic
2-3.9 Windows Greater Than 6 in. Thick
2-3.10 Bond Testing
2-4 FABRICATION
2-4.1 Responsibilities and Duties for Window Fabricators
89 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
2-5.4 Inclusion Inspection
90 Table 2-4.5-1 Annealing Schedule for Acrylic Windows
91 2-5.5 Scratch Characterizations
92 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
2-7 PRESSURE TESTING
2-7.1 Frequency
2-7.2 Test Configuration
93 PVHO-1 Form VP-5 Pressure Testing Certification
94 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
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
95 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
2-9.8 Repair of Spherical Window by Spot Casting
96 2-10 GUIDELINES FOR APPLICATION OF THE REQUIREMENTS OF SECTION 2
2-10.1 Introduction
2-10.2 Sample Design Procedures
97 PVHO-1 Form VP-6 Acrylic Window Repair Certification
98 2-10.3 Sample Purchase Specification and Product Reviews
2-10.4 Sample Pressure Test Instructions
2-10.5 Sample Calculations
100 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
101 Section 4 Piping Systems
4-1 GENERAL
4-1.1 Scope
4-1.2 Design and Fabrication
4-1.2.1 UserŒs Design Specification.
4-1.2.2 Design Certification.
4-1.2.3 FabricatorŒs Certification.
4-1.2.4 Data Retention.
4-1.2.5 Medical-Use PVHO Certifications.
102 4-2 MATERIAL REQUIREMENTS
4-2.1 Acceptable Materials
4-2.1.1 Pipe and Tube.
4-2.1.2 Fittings.
4-2.2 Limitations on Materials
4-2.2.1 Service Requirements.
4-2.2.2 Carbon Steel.
4-2.2.3 Aluminum.
4-2.2.4 Castings.
4-2.2.5 Seawater Service.
4-2.2.6 Oxygen Service.
4-2.3 Lubricants and Sealants
4-2.4 Nonmetallic Materials
4-2.4.1 Hose Materials and Pressure Ratings
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
103 4-2.4.2 Installation
4-2.4.3 Marking.
4-2.4.4 Hoses Subject to External Pressure.
4-2.4.5 Testing
104 4-2.4.6 Nonmetallic Pipe and Tube and Bonding Agents.
4-3 DESIGN OF COMPONENTS
4-3.1 Straight Piping Under External Pressure
4-3.2 Straight Piping Under Internal Pressure
4-3.2.1 Minimum Wall Thickness.
4-3.2.2 Additional Thickness Requirements.
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
4-4.1.1 Maximum Allowable Working Pressure.
4-4.1.2 Differential Pressures.
105 4-4.1.3 Alternating Internal and External Pressures.
4-4.1.4 Pressure Ratings.
4-4.2 Valves
4-4.2.1 Valves Subject to Internal and External Pressures.
4-4.2.2 Stop Valves.
4-4.2.3 Ball Valves.
4-4.2.4 Service Access.
4-4.2.5 Quick-Opening Valves.
4-4.2.6 Remotely Operated Valves.
4-4.2.7 Relief Valves.
4-4.3 Filters
4-4.3.1 Element Collapse Pressure Rating.
4-4.3.2 Element Construction.
4-4.3.3 Bypass Requirements.
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
4-5.3.1 Seal Selection.
4-5.4 Threaded Joints
4-5.4.1 Pressure Limitations
106 4-5.4.2 Helium Service.
4-5.4.3 Lubricants.
4-5.4.4 Seal Welding.
4-5.4.5 Stainless Steel Threads.
4-5.4.6 Straight Threads.
4-5.4.7 Aluminum Threads.
4-5.5 Joints and Fittings in Tubes
4-5.5.1 Fittings Subject to Frequent Disassembly.
4-5.5.2 Limitations.
4-5.5.3 Restrictions.
4-5.5.4 Cutting of Tube.
4-6 SUPPORTS
4-7 INSPECTION
4-7.1 Inspection of Welded Joints
107 4-7.2 Inspection of Brazed Joints
4-8 TESTING
4-8.1 Hydrostatic Tests
4-8.1.1 Test Fluid.
4-8.1.2 Test Pressure.
4-8.1.3 Holding Time.
4-8.1.4 Examination.
4-8.1.5 Air Vents.
4-8.2 Pneumatic Tests
4-8.2.1 Limitations.
Table 4-7.1-1 Mandatory Minimum Nondestructive Examinations for Pressure Welds in Piping Systems for Pressure Vessels for Human Occupancy
108 4-8.2.2 Test Medium.
4-8.2.3 Test Pressure.
4-8.2.4 Preliminary Test.
4-8.2.5 Application of Pressure.
4-8.2.6 Holding Time.
4-8.3 Leak Testing
4-9 SYSTEMS
4-9.1 System Design Requirements
4-9.2 Pressurization and Depressurization Systems
4-9.2.1 Pressurization and Depressurization Rates.
4-9.2.2 Ventilation Rates.
4-9.2.3 Stored Gas Reserves.
4-9.2.4 Exhaust Inlet Protection.
109 4-9.2.5 Exhaust Locations.
4-9.2.6 Noise.
4-9.3 Pressure Boundary Valve Requirements
4-9.3.1 Internal Pressure PVHOs.
4-9.3.2 External Pressure PVHOs.
4-9.3.3 Internal and External Pressure PVHOs.
4-9.3.4 External Override.
4-9.3.5 Special Requirements for PVHOs Used for Saturation Service.
4-9.3.6 Flow-Rate-Sensitive Valves.
4-9.3.7 Remotely Operated Stop Valves.
4-9.4 Depth Gauges
4-9.4.1 Quantity and Location
4-9.4.2 Calibration.
4-9.4.3 Piping.
4-9.4.4 Valve Arrangements.
110 4-9.5 Pressure Gauges Other Than Depth Gauges
4-9.6 Breathing Gas Systems
4-9.6.1 Breathing Gas Outlets.
4-9.6.2 Redundancy of Breathing Gas Supply.
4-9.6.3 Stored Gas Reserves.
4-9.6.4 Multiple Gases.
4-9.6.5 Labeling of Breathing Gas Outlets.
4-9.6.6 Separation of Breathing Gases.
4-9.6.7 Pressure Control Valves in Demand Breathing Systems.
4-9.7 Pressure Control Valves
4-9.7.1 Performance Characteristics.
4-9.7.2 Seats.
4-9.7.3 Filters.
4-9.7.4 Gauges.
4-9.7.5 Bypass Requirements.
4-9.7.6 Pressure Control Valves Used in Demand Breathing Systems
111 4-9.8 Pressure Relief Requirements
4-9.8.1 Overpressure Relief
4-9.8.2 Underpressure Relief
4-9.8.3 Rupture Disks.
4-9.8.4 Division Valves.
4-9.8.5 Pressure-Reducing Valves.
4-9.8.6 Bypass Valves.
4-9.8.7 Stop Valves.
112 4-9.8.8 Exhausts From Relief Devices
4-9.9 Color Coding
4-9.9.1 Consistent Color Codes.
4-9.9.2 Owner’s Responsibility.
4-9.10 Labeling
4-9.10.1 Piping and Gas Storage Vessels.
4-9.10.2 Critical Components.
4-9.10.3 Panel-Mounted Components.
4-9.11 Soft Goods
4-9.11.1 Breathing Gas Systems.
4-9.11.2 Other Systems.
4-9.12 Lubricants and Sealants
4-9.13 Cleaning Requirements
4-9.13.1 Oxygen and Breathing Gas Systems.
4-9.13.2 Components Located Inside PVHOs.
4-9.13.3 Prohibited Cleaning Materials.
4-9.14 Off-Gassing Test for Hoses Used for Breathing Gas Service
4-9.14.1 Background.
4-9.14.2 Procedure
113 4-9.14.3
Fig. 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
114 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 Windows
5-1.5 Quick-Actuating Closures
5-1.6 Personnel Entry Lock
5-1.7 Penetrations
5-1.8 Personnel Egress
5-2 PVHO SYSTEM DESIGN
5-3 GAS SYSTEMS
5-3.1 Gas Storage Requirements
115 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
5-5.2.1 Multiplace Chambers.
5-5.2.2 Monoplace Chambers.
5-5.3 Humidity
5-5.4 Contaminants
5-5.5 Lighting
5-5.5.1 External Lighting.
5-5.5.2 Emergency Lighting.
5-5.6 External Heat Sources
5-5.7 Access to Emergency Equipment
5-5.8 Suction Systems
5-5.9 Accidental Depressurization
116 Section 6 Diving Systems
6-1 GENERAL
6-1.1 Scope
6-1.1.1
6-1.1.2
6-1.2 User’s Design Specification
6-1.3 Design Certification
6-1.4 Documentation
117 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
6-2.8.1
6-2.8.2
118 6-2.8.3
6-2.8.4
6-2.9 Lubricants and Sealants
6-2.10 Fire Safety
6-2.11 Fire Suppression
6-2.12 Material Toxicity (Including Paints)
6-2.13 Electrical
6-2.14 Gas Storage Cylinders and Volume Tanks
6-2.14.1 Gas Storage Cylinders.
6-2.14.2 Volume Tanks.
119 6-3 PRESSURE BOUNDARY
6-3.1 Personnel Access Doors/Hatches
6-3.2 Medical/Service Locks
6-3.3 Closures
6-3.4 Trunks and Tunnels
6-3.5 Viewports
6-3.6 Lighting
6-3.6.1 Light Level.
6-3.6.2 Lighting Devices.
6-3.7 Service Penetrators
120 6-3.8 Electrical Penetrators
6-3.9 Fiber-Optic Penetrators
6-4 SYSTEMS
6-4.1 Handling Systems
6-4.1.1 General.
6-4.1.2 Design.
6-4.1.3 Test and Trials.
6-4.2 Communication Systems
6-4.2.1
6-4.2.2
6-4.2.3
121 6-4.3 Sanitary Systems
6-4.3.1
6-4.3.2
6-4.3.3
6-4.3.4
6-4.4 Electrical Systems
6-4.4.1 General.
6-4.4.2 Power Supplies
6-4.4.2.1 General.
6-4.4.2.2 Main Power.
6-4.4.2.3 Emergency Power.
6-4.4.2.4 Reserve Power.
6-4.4.3 Distribution
6-4.4.3.1 General.
122 6-4.4.3.2 Voltage.
6-4.4.3.3 Ground Detectors.
6-4.4.3.4 Cables and Wiring.
6-4.4.3.5 Cable Separation.
6-4.4.3.6 Positive and Negative Conductors.
6-4.4.3.7 Cables Subjected to External Pressure.
6-4.4.4 Circuit Protection
6-4.4.4.1 Circuit Protection Devices.
6-4.4.4.2 Pressure Boundary Power Penetrations.
6-4.4.5 Battery Compartments
6-4.4.5.1 Sources of Ignition.
6-4.4.5.2 Hydrogen Levels.
6-4.4.5.3 Electrical Equipment.
6-4.5 Emergency Evacuation Systems
6-4.5.1 General.
6-4.5.2 Emergency Evacuation System User Requirements
6-4.5.2.1
123 6-4.5.2.2
124 6-4.5.3 Emergency Evacuation Life-Support Control System.
6-4.5.4 Testing
6-4.5.4.1
6-4.5.4.2
6-4.5.4.3
6-4.5.4.4
6-4.5.4.5
Fig. 6-4.5.2.2-1 Placement and Design of Markings of Hyperbaric Rescue Systems Designed to Float in Water
Fig. 6-4.5.2.2-2 Markings of Hyperbaric Rescue Systems Designed to Float in Water
125 6-4.5.4.6
6-4.5.4.7
6-4.6 Emergency Recovery of Diving Bells
6-4.6.1 General.
6-4.6.2 Design.
6-4.6.3 Negative Buoyancy Diving Bells.
6-4.6.4 Positive Buoyancy Diving Bells.
6-4.6.5 Functional Testing.
6-5 TESTING
6-6 QUICK-ACTING CLOSURES FOR DIVING BELLS AND EMERGENCY EVACUATION SYSTEMS
6-6.1 General
6-6.2 Design
126 6-6.3 Testing
127 Section 7 Submersibles
7-1 GENERAL
7-1.1 Scope
7-1.2 General Requirements
7-1.2.1 Single Failure.
7-1.2.2 Operating Conditions.
7-1.3 User’s Design Specification
7-1.4 Design Certification
7-1.5 Documentation
128 7-1.6 Operations Manual
7-2 PRESSURE BOUNDARY
7-2.1 General
7-2.2 Hatches
7-2.2.1 Number, Size, and Location.
7-2.2.2 Opening, Closing, and Securing.
7-2.2.3 Equalization.
7-2.3 Viewports
7-2.4 Penetrators
7-2.4.1 Mechanical Penetrators.
7-2.4.2 Hull Shut-Off Valves.
7-2.4.3 Testing Electrical Penetrators.
129 7-2.4.4 Electrical Penetrators.
7-3 PIPING
7-3.1 Exceptions and Alternatives
7-3.1.1 Relieving Devices.
7-3.1.2 User’s Design Specification.
7-3.1.3 Marking.
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
130 7-4.2 Power Supplies
7-4.2.1 General.
7-4.2.2 Main Power.
7-4.2.3 Emergency Power.
7-4.3 Electrical Cables
7-4.3.1 Protection.
7-4.3.2 Main and Emergency Cables.
7-4.3.3 Positive and Negative Conductors.
7-4.3.4 Pressure Boundary.
7-4.3.5 Grounding.
7-4.3.6 Insulation Material.
7-4.4 Battery Compartments
7-4.4.1 Sources of Ignition.
7-4.4.2 Hydrogen Levels.
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
131 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
7-7.5 Obstacle Avoidance
132 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
133 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
134 MANDATORY APPENDIX I REFERENCE CODES, STANDARDS, AND SPECIFICATIONS
136 MANDATORY APPENDIX II DEFINITIONS
142 NONMANDATORY APPENDIX A DESIGN OF SUPPORTS AND LIFTING ATTACHMENTS
143 NONMANDATORY APPENDIX B RECOMMENDATIONS FOR THE DESIGN OF THROUGH-PRESSURE BOUNDARY PENETRATIONS
B-1 GENERAL
B-2 PENETRATOR DESIGNS
B-3 COUPLING DETAILS
B-3.1 Threaded Couplings
B-3.2 Threaded Insert Couplings
B-4 MATERIALS
144 Fig. B-2-1 Acceptable Weld Nozzle Penetrators
145 Fig. B-3-1 Acceptable Threads and Inserts
146 Table C-1 U.S. Navy Color Codes
Table C-2 IMO Color Codes
NONMANDTORY APPENDIX C RECOMMENDED PRACTICES FOR COLOR CODING AND LABELING
147 NONMANDATORY APPENDIX D GUIDELINES FOR THE SUBMISSION OF A PVHO CASE FOR THE USE OF NONSTANDARD DESIGNS, MATERIALS, AND CONSTRUCTION
D-1 INTRODUCTION
D-2 GENERAL
D-3 MATERIALS
148 D-4 DESIGN
D-4.1 Design Analysis
D-4.2 Maximum Allowable Working Pressure
D-4.3 Design Certification
D-4.4 Unusual Design Features
D-5 TESTING
D-5.1 Prototype Testing
D-5.1.1 Proof Pressure Test.
D-5.1.2 Extended-Duration Creep-Rupture Testing.
149 D-5.1.2.1
D-5.1.2.2
D-5.1.3 Cyclic Pressure Testing.
D-5.1.4 Other Tests.
D-5.1.5 Statistical Analysis.
D-5.2 Production Proof Pressure Testing
D-6 QUALITY ASSURANCE OVERVIEW BY AN INDEPENDENT THIRD-PARTY AGENT
150 D-7 STATISTICAL ANALYSIS
D-7.1 Method I: Check of Data Set for Normal Distribution 3 less than n less than or equal 50
D-7.2 Method II: MAWP Based on Normally Distributed Proof Test Data
151 Table D-7.1-1 Tabulated Data for Performance of “W-Test” for Normality of Data Set
152 D-7.3 Method III: Nonparametric Determination of MAWP From Proof Tests
D-7.4 Method IV: MAWP Determination Based on Nonfailure Test Pressure
153 NONMANDATORY APPENDIX E GUIDELINES FOR PREPARING A PVHO PERFORMANCE-BASED CASE FOR FLEXIBLE CHAMBERS
E-1 GENERAL REQUIREMENTS
E-1.1 Introduction
E-1.2 Scope
E-1.2.1 Application.
E-1.2.2 Pressure Boundary.
E-1.3 Exclusions
E-1.4 Design Limitations
E-1.5 Design Specification
E-1.5.1 Criteria to Be Specified.
E-1.5.2 Other Codes and Standards.
154 E-1.5.3 Certification of Design Specification.
E-1.6 ManufacturerŒs Data Report
E-1.7 Documentation
E-1.7.1 Documentation Provided to the User.
E-1.7.2 Documentation Retained by the Manufacturer for Individual Units.
E-1.7.3 PVHO Design Qualification Documentation.
E-2 DESIGN
E-2.1 General
E-2.2 PVHO Design
E-2.3 Basis of PVHO Design
155 E-2.4 Design Loads
E-2.5 Access Doors, Hatches, and Service Locks
E-2.6 Electrical
E-2.7 Unusual Design Features
E-2.8 Risk Analysis
156 E-2.9 Design Report
E-2.10 Repair Specification
E-3 MATERIALS
E-3.1 General
E-3.1.1 Application.
E-3.1.2 Compliance with Standards.
E-3.1.3 Alternative Material Specification.
E-3.1.4 Material Traceability.
E-3.1.5 Material Test Samples.
E-3.1.6 Supporting Information for Materials.
157 E-3.2 Window Materials
E-3.3 Flammability
E-3.3.1 Flammability Evaluation.
E-3.3.2 Materials Qualified to NFPA 701.
158 Fig. A.3.3.14.3 Cook’s Diagram: Atmosphere of Increased Burning Rate
E-3.4 Material Considerations
E-4 QUALITY ASSURANCE PROGRAM
E-4.1 Certification
E-4.2 General
159 E-4.2.1 Organization.
E-4.2.2 Design Control.
E-4.3 Document Control
E-4.4 Procurement Control
E-4.5 Material Control
E-4.6 Process Control
E-4.7 Inspection Control
E-4.8 Test Control
E-4.9 Control of Measuring, Test, and Inspection Equipment
160 E-4.10 Control of Nonconforming Items and Materials
E-4.10.1 Repair of Nonconforming PVHOs.
E-4.11 Quality Assurance Records
E-4.12 Quality Assurance Overview by a Qualified Third Party
E-4.13 Modifications to PVHO Design
E-5 TESTING
E-5.1 Test Requirements
E-5.2 Design Qualification Prototype Testing
E-5.2.1 Burst or Proof Pressure Tests.
161 Fig. E-5.2.2.1-1 Number of Test Samples Required for Alternate Creep Test Procedure
E-5.2.2 Extended-Duration Creep-Rupture Testing.
E-5.2.2.1 Test Procedure.
162 E-5.2.2.2 Alternative Test Procedure.
E-5.2.3 Cyclic Design Life.
E-5.2.4 Chronological Design Life.
E-5.2.5 Aging.
163 E-5.2.5.1 Accelerated Chronological Aging.
E-5.2.5.2 Aging due to UV Exposure.
E-5.2.5.3 Other Aging Mechanisms.
E-5.2.5.4 Alternative Approaches.
E-5.2.5.5 Avoiding Aging.
E-5.2.6 Nonmetallic Materials and Toxicity Off-Gas Testing.
E-5.2.7 Leakage and Pressure Drop Tests.
E-5.2.7.1 Maximum Allowable Pressure Drop Rate.
E-5.2.7.2 Pressure Drop Rate Test.
E-5.2.8 Additional Prototype Joint Tests.
E-5.2.9 Folding Tests.
E-5.2.10 Pressurized Drop Tests.
164 Fig. E-5.2.5.1-1 Time Versus Test Temperature for Accelerated Aging Test
165 E-5.2.11 Handling Features of Portable and Transportable PVHOs.
E-5.2.12 Other Design Qualification Tests.
E-5.3 Production Testing
E-5.3.1 Proof Pressure Testing.
E-5.3.2 Pressure Drop Rate Testing.
E-5.3.3 Joint Testing.
E-5.4 Testing of PVHO Repairs
E-5.4.1 Prototype Repair Testing.
E-5.4.2 Production Repair Testing.
166 E-6 DOCUMENTATION
E-6.1 General
E-6.2 OwnerŒs Manual
E-7 MARKING
E-7.1 General
E-7.2 Marking and Attachment of Label
167 E-7.3 Label Information
168 NONMANDATORY APPENDIX F USEFUL REFERENCES
170 ASME PVHO-1 CASES
171 PVHO Case 8 Alternative Testing Requirements for Large Subatmospheric Pressure PVHO Chambers
172 PVHO Case 10 Use of Clear Plastic Viewport Retaining Covers in Lieu of Metallic Retaining Rings
173 Fig. 10-1 Acceptable Configurations for Clear Viewport Retaining Covers
174 Table 11-1 Maximum Flange-to-Flange Relative Displacement
PVHO Case 11 Use of Nonmetallic Expansion Joint
1 GENERAL
1.1 Requirements
1.2 Standards
2 MATERIALS
2.1 Commercial-Grade Fluoroelastomer
175 2.2 Neoprene N4614
2.3 Neoprene N5157
2.4 Neoprene N8017
2.5 Neoprene N4957
2.6 Polyester DD1500
2.7 Polyester DD1200
176 2.8 Flange Tie-Down, Steel Cord JZ #5
2.9 Body Rings
3 DESIGN AND MANUFACTURE
3.1 Design
3.2 Requirements
3.3 Design Certification
3.4 Manufacture
4 TESTING
177 4.1 Prototype Testing
4.2 Production Testing
5 QUALITY ASSURANCE PROGRAM
5.1 General
5.2 Organization
5.3 Design Control
178 5.4 Document Control
5.5 Procurement Control
5.6 Material Control
5.7 Process Control
5.8 Inspection Control
5.9 Test Control
5.10 Control of Measuring Test and Inspection Equipment
5.11 Control of Nonconforming Items/Materials
5.12 Quality Assurance Records
5.13 Standard Repair Planning
179 5.14 Quality Assurance Overview by an Independent Third Party
6 MARKING
180 PVHO-1 Case 11 Form Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
181 PHVO Case 12Use of Nonmetallic Braid-Reinforced Flexible Membrane Vessels Under PVHO-1–2012
1 GENERAL
182 Fig. 12-1 Typical Configuration
183 Table 12-1
2 MATERIALS
3 DESIGN AND MANUFACTURE
3.1 Design
3.2 Requirements
184 Table 12-2 Structural Nonmetallic Materials of Construction — Pressure Tube
Table 12-3 Test Procedures and/or Specifications Listed in Table 12-2 or Referred to in Case 12
185 3.3 Design Certification
3.4 Manufacture
4 TESTING
4.1 Prototype Testing
186 4.2 Production Testing
5 QUALITY ASSURANCE
5.1 General
5.2 Organization
5.3 Design Control
5.4 Document Control
5.5 Procurement Control
187 5.6 Material Control
5.7 Process Control
5.8 Inspection Control
5.9 Test Control
5.10 Control of Measuring Test and Inspection Equipment
5.11 Control of Nonconforming Items/Materials
5.12 Quality Assurance Records
5.13 Standard Repair Planning
5.14 Quality Assurance Overview by an Independent Third Party
188 Fig. 12-2 Example Marking of Case 12 PVHO
Fig. 12-3 Additional Markings for Case 12 PVHOs
6 MARKING
189 PVHO-1 Case 12 Form Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
192 PHVO-1 Case 15 Use of Polyester-Jacketed, Aliphatic-Coated Bladder, Zippered Closure Cylindrical Vessels in the Construction of PVHOs Under PVHO-1–2012
1 GENERAL
1.1 Exclusions
1.2 User’s Design Specification
193 Fig. 15-1 Typical PVHO Configuration
195 Fig. 15-2 Window Shield
2 MATERIALS
3 DESIGN AND FABRICATION
3.1 Design Analysis
3.2 Requirements
196 Table 15-1 PVHO Materials of Construction
197 3.3 Design Certification
3.4 Fabrication
4 TESTING
4.1 Prototype Testing
198 4.2 Production Testing
5 QUALITY ASSURANCE PROGRAM
5.1 General
5.2 Organization
199 5.3 Design Control
5.4 Document Control
5.5 Procurement Control
5.6 Material Control
5.7 Process Control
5.8 Inspection Control
5.9 Test Control
5.10 Control of Measuring Test and Inspection Equipment
5.11 Control of Nonconforming Items/Materials
5.12 Quality Assurance Records
200 5.13 Standard Repair Planning
5.14 Quality Assurance Overview by an Independent Third Party
6 MARKING
7 DOCUMENTATION
201 PVHO-1 Case 15 Form Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
202 PHVO-1 Case 16 Use of Nylon-Jacketed, Aliphatic-Coated Bladder, Zippered Closure Cylindrical Vessels in the Constructionof PVHOs Under PVHO-1–2012
1 GENERAL
1.1 Exclusions
1.2 User’s Design Specification
203 Fig. 15T38145 PVHO Chamber
204 2 MATERIALS
3 DESIGN AND FABRICATION
3.1 Design Analysis
3.2 Requirements
3.3 Design Certification
205 Table 16-1 PVHO Materials of Construction
206 3.4 Fabrication
4 TESTING
4.1 Prototype Testing
207 4.2 Production Testing
5 QUALITY ASSURANCE PROGRAM (QAP)
5.1 General
5.2 Organization
5.3 Design Control
5.4 Document Control
208 5.5 Procurement Control
5.6 Material Control
5.7 Process Control
5.8 Inspection Control
5.9 Test Control
5.10 Control of Measuring Test and Inspection Equipment
5.11 Control of Nonconforming Items/Materials
5.12 Quality Assurance Records
5.13 Standard Repair Planning
209 5.14 Quality Assurance Overview by an Independent Third Party
6 MARKING
7 DOCUMENTATION
210 PVHO-1 Case 16 Form Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
211 PHVO Case 17 Allow for Markings on Windows to Be Placed on Locations Other Than Those Permitted Under Para. 2-6.4 of PVHO-1–2012
212 PHVO-1 Case 18 Use of Nonmetallic Braid-Reinforced Flexible Membrane Multiple-Occupancy Vessels Under PVHO-1–2012
1 GENERAL
213 Table 18-1 Plan View of Configurations Covered Under This Case
214 Fig. 18-1 Typical Cofiguration of PVHOs
215 1.1 Additional Parameters
1.2 Exclusions
2 MATERIALS
3 DESIGN AND MANUFACTURE
3.1 Design
216 Table 18-2 Structured Nonmetallic Materials of Construction
217 Table 18-3 Test Procedures and/or Specifications Listed in Table 18-2
218 3.2 Requirements
3.3 Design Certification
3.4 Manufacture
4 TESTING
219 4.1 Prototype Testing
4.2 Production Test
220 Fig. 18-2 Extended-Duration Creep-Rupture Test
4.3 In-Process Tests
5 QUALITY ASSURANCE
5.1 General
5.2 Organization
5.3 Design Control
5.4 Document Control
221 5.5 Procurement Control
5.6 Material Control
5.7 Process Control
5.8 Inspection Control
5.9 Test Control
5.10 Control of Measuring Test and Inspection Equipment
5.11 Control of Nonconforming Items and Materials
5.12 Quality Assurance Records
5.13 Standard Repair Planning
222 5.14 Quality Assurance Overview by an Independent Third Party
6 MARKING
223 Fig. 18-3 Example Marking of Case 18 PVHO
Fig. 18-4 Additional Markings for Case 18 PVHOs
224 PVHO-1 Case 18 Form Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
225 PHVO Case 19 Multiple Temperature-Pressure Ratings for PVHO Windows
226 PHVO-1 Case 20 Use of Nylon-Jacketed, Aliphatic-Coated Bladder, Zippered Closure Cylindrical Vessels in the Construction of PVHOs Under PVHO-1–2012
1 GENERAL
1.1 Exclusions
1.2 User’s Design Specification
227 Fig. 15C37195 Final Assembly of 27-in. 1.5 ATA Chamber
229 2 MATERIALS
3 DESIGN AND FABRICATION
230 Table 20-1 PVHO Materials of Construction
231 3.1 Design Analysis
3.2 Design Risk Analysis
3.3 Requirements
3.4 Design Certification
3.5 Fabrication
232 4 TESTING
4.1 Prototype Testing
233 Fig. 20-1 Creep Test Acceptance Criteria
4.2 Production Testing
234 5 QUALITY ASSURANCE PROGRAM
5.1 General
5.2 Organization
5.3 Design Control
5.4 Document Control
5.5 Procurement Control
5.6 Material Control
5.7 Process Control
5.8 Inspection Control
5.9 Test Control
5.10 Control of Measuring Test and Inspection Equipment
235 5.11 Control of Nonconforming Items and Materials
5.12 Quality Assurance Records
5.13 Standard Repair Planning
5.14 Quality Assurance Overview by an Independent Third Party
6 MARKING
236 7 DOCUMENTATION
237 PVHO-1 Case 20 Form Manufacturer’s Data Report for Pressure Vessels for Human Occupancy
238 PHVO-1 Case 21 Use of a Transportable Flexible Coated Aramid Conical Vessel as a PVHO Under PVHO-1–2012
1 GENERAL
1.1 Description of the PVHO
1.2 General Requirements
239 Fig. 21-1 Main Parts of the Pressure Vessel
Fig. 21-2 PVHO
240 Fig. 21-3 Packed PVHO
2 MATERIALS
2.1 Material Requirements
2.2 Materials Properties
241 Table 21-1 Required Mechanical Properties of Shell Materials
Table 21-2 Required Mechanical Properties of Rigid Composite Parts Materials
242 Table 21-3 ASTM Test Methods
2.3 Summary of ASTM Test Methods
3 DESIGN
3.1 Applicable Standards
3.2 Design Analysis
3.3 Design Requirements
243 Fig. 21-4 Closing System and Large Window Assembly Details
Table 21-4 ASME PVHO-1 Design Exclusions
244 Fig. 21-5 Small Window Assembly Details
3.4 Design Certification
245 Fig. 21-6 Closing System Actuation Details
4 MANUFACTURING
4.1 Qualification
4.2 Methods of Fabrication
246 4.3 Manufacturing Procedures
4.4 Control of Raw Materials
4.4.1 Resin Systems.
4.4.2 Fiber Systems.
4.4.3 Core Materials.
4.5 In-Process Controls
4.5.1 Winding.
4.5.2 Infusion Molding (Contact Molding).
4.5.3 Adhesive Bonding and Casting.
4.6 Parts Inspections
4.6.1 Resin Cure.
247 4.6.2 Laminate Mechanical Properties.
4.6.3 Weight and Fiber-Resin Ratio.
4.6.4 Visual Inspection.
4.6.5 Secondary Bonding.
4.6.6 Wall Thickness Checks.
5 TESTING
5.1 Prototype Testing
5.1.1 Proof Pressure Test.
5.1.2 Cyclic Hydrostatic Pressure Test.
5.1.3 Extended-Duration (Creep-Rupture) Test.
248 Fig. 21-7 Creep-Rupture Test Acceptance Criteria
Table 21-5 Creep Test Options
5.1.4 Cold Storage Test.
5.1.5 Cyclic Folding Test.
249 5.1.6 Off-Gassing Toxicity Test.
5.1.7 Flammability Tests.
5.1.8 Puncture Test.
5.1.9 Lighting Heat Test.
5.1.10 Cyclic Closing System Wear Test.
5.2 Production Testing of Assembled Vessel
6 QUALITY ASSURANCE PROGRAM
6.1 General
250 6.2 Organization
6.3 Design Control
6.4 Document Control
6.5 Procurement Control
6.6 Material Control
6.7 Process Control
6.8 Inspection Control
6.9 Test Control
251 6.10 Control of Measuring Test and Inspection Equipment
6.11 Control of Nonconforming Items and Materials
6.12 Quality Assurance Records
6.13 Quality Assurance Overview by an Independent Third Party
6.14 Risk Analysis
7 MARKING AND REPORT
7.1 Marking
252 7.2 Report
253 PVHO-1 Case 21 Form Manufacturer’s Data Report for Pressure Vessels for Human Occupancy

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