This Code applies to facilities, technology and inspection for manufacturing of storage tanks and pressure vessels (hereinafter referred to as “pressure vessels”) among specially-designated facilities in conformity to the High-Pressure Gas Safety Control Act (hereinafter to be referred to as “the Act”), Article 3, Clause 5.
1. General
1.1 SCOPE
1.2 VALIDITY OF CODE
1.3 REFERENCE CODES AND STANDARDS
1.3.1 Inspection standard for new technology products
1.3.2 Registration standard for manufacturing of foreign pressure vessels
1.4 DEFINITIONS
1.5 APPLICATION OF CODES AND STANDARDS
2. Manufacturing Installation Standard
2.1 MANUFACTURING FACILITIES
2.2 INSPECTION FACILITIES
3. Manufacturing Technology Standard
3.1 DESIGN
3.2 MATERIALS
3.3 THICKNESS
3.3.1 Minimum thicknesses of parts other than tube
3.3.2 Minimum thickness of tubes
3.4 CONSTRUCTION AND DIMENSIONS
3.4.1 Flange specification
3.4.2 Permissible out-of-roundness of shells
3.4.3 Shapes of conical shells
3.4.4 Shapes of heads
3.4.5 Openings in pressure vessels
3.5 FABRICATION
3.5.1 Cutting, forming and finishing of materials
3.5.2 Methods of attachment of tubes to tube sheets
3.5.5 Attachment of stays
3.5.6 Expansion joints
3.5.7 Reinforcement of openings
3.5.8 Stiffening rings
3.6 WELDING
3.6.1 Classification of welded joints
3.6.2 Restriction to welding types
3.6.3 Welded joint efficiency
3.6.4 Strength of welds
3.6.5 Butt welds
3.6.6 Double full fillet welds
3.6.7 Welding of heads and shells
3.6.8 Welding of shells and flat plates
3.6.9 Welding of nozzles, reinforcing materials, etc.
3.6.10 Welding of stiffening rings
3.6.11 Welding of jackets
3.6.12 Welding of stays
3.6.13 Finish of welds
3.6.14 Welding conditions
3.7 HEAT TREATMENT
3.7.1 Heat treatment after forming
3.7.2. Post weld heat treatment of welds
3.8 PERFORMANCE (CURRENTLY NOT USED)
3.9 PAINTING (CURRENTLY NOT USED)
3.10 ATTACHMENT OF SAFETY DEVICES (CURRENTLY NOT USED)
3.11 ATTACHMENT OF ACCESSORIES (CURRENTLY NOT USED)
3.12 COLORING AND MARKING
3.12.1 External coloring (currently not used)
3.12.2 Marking of gas types (currently not used)
3.12.3 Marking of products
3.12.4 Marking of acceptance
4. Inspection Standard
4.1 KINDS OF INSPECTION
4.1.1 Manufacturing installation inspection
4.1.2 Product inspection
4.2 OBJECT AUDIT FOR PROCESS INSPECTION
4.2.1 Application for audit
4.2.2 Audit method
4.2.3 Adjudication committee
4.3 INSPECTION ITEMS
4.3.1 Manufacturing installation inspection
4.3.2 Product inspection
4.4 INSPECTION METHODS
4.4.1 Inspection of facilities
4.4.2 Product inspection
4.5 OTHER STANDARDS
4.5.1 Inspection of imported products (currently not used)
4.5.2 Partial omission of inspection
4.5.3 Disposal of Rejected Products
Appendix A Maximum Allowable Tensile Stress of Steels
Appendix B
Appendix C Heat Treatment Temperature Depending on Kind of Base Metal
Appendix D Correction Constant Depending on Heat Treatment Temperature Reduction
Appendix E Classification of Base Metals <Revised on January 8, 2016>
Appendix F Classification of Shielded Arc Electrodes
Appendix G Classification of Welding Wires
Appendix H
Appendix I General Standard for Operation of Quality Control System for
Pressure Vessel Manufacturing Plants
Appendix J Ductile iron castings and malleable iron castings
Appendix K Code for Technology and Inspection for Manufacturing of Cold-stretching pressure vessels, etc.
