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Applicable ASME code
| Symbol | Product category | Applicable ASME code |
|---|---|---|
| S PP | Power Boilers Power PipingPower Boilers | Section ISection II: Parts A, B, C, D Section V Section IX B 31.1(Refer to Section I for edition and addenda) |
| A | Assembly of Power Boilers | Section I Section II: Part C Section V Section IX B 31.1 (Refer to Section I for edition and addenda) |
| E | Electric Boilers (Assembled without welding) |
Section I Section II: Parts A, B, D B 31.1 (Refer to Section I for edition and addenda) |
| M | Miniature Boilers | Section I Section II: Parts A, B, C, D Section IX B 31.1 (Refer to Section I for edition and addenda) |
| V | Boiler Safety Valves | Section I Section II: Parts A, B, C, D Section IX PTC 25, (Refer to Section I for edition and addenda) |
| H | Heating Boilers, Except Cast Iron | Section II: Parts A, B, C Section IV Section IX |
| HLW | Lined Potable Water Heaters | Section II: Parts A, B, C Section IV Section IX |
| H | Cast Iron and Cast Aluminum Boilers | Section IV |
| H | Field Assembly of Boilers | Section IV Section IX |
| HV | Heating Boiler Safety Valves | Section II: Parts A, B, C Section IV Section IX PTC 25. (Refer to Section IV for edition and addenda) |
| U UM | Pressure Vessels and Miniature Pressure Vessels, Division 1 | Section II: Parts A, B, C, D Section V Section VIII, Division 1 Section IX |
| UV | Pressure Vessel Safety Valves | Section II: Parts A, B, C, D Section VIII, Division 1 or Division 2 Section IX PTC 25. (Refer to Section VIII, Division 1 or Division 2, for edition and addenda) |
| UD | Rupture Disk Devices | Section II: Parts A, B, C, D Section VIII, Division 1 Section IX PTC 25 (Refer to Section VIII for edition and addenda) |
| U3 | Pressure Vessels, Division 3 | Section II: Parts A, B, C, D Section V Section VIII, Division 3 Section IX |
| UV3 | Pressure Vessel Safety Valves | Section II: Parts A, B, C, D Section VIII, Division 3 Section IX PTC 25 (Refer to Section VIII for edition and addenda) |
| RP | Fiber-Reinforced Plastic Vessels | Section X |
| T | Transport Tanks | Section XII Section II, Parts A, B, C, D Section V Section IX |
| TV | Transport Tank Safety Valves | Section XII Section II, Parts A, B, C, D Section IX PTC 25 (Refer to Section XII for Code edition and addenda) |
| TD | Transport Tank Rupture Disk Devices | Section XII Section II, Parts A, B, C, D Section IX PTC 25 (Refer to Section XII for Code Edition and Addenda) |
| N NA NPT NS |
Nuclear Components Nuclear Installation and Shop Assembly Nuclear Parts Nuclear Supports |
Section III: Subsection NCA and Appendices Section V Section IX NQA-1(latest mandatory edition) May also require: Subsection NB - Class 1 Components Subsection NC - Class 2 Components Subsection ND - Class 3 Components Subsection NE - Class MC Components Subsection NF - Supports Subsection NG - Core Support Structures Subsection NH - Class 1 Components in Elevated Temperature Service Division 2 Division 3 Section II: Parts A, B, C, D |
| N3 | Nuclear Components | Section III, Division 3 Section V Section IX NQA-1(latest mandatory edition) May also require: Subsection NB - Class 1 Components Subsection NC - Class 2 Components Subsection ND - Class 3 Components Subsection NE - Class MC Components Subsection NF -Supports Subsection NG - Core Support Structures Subsection NH - Class 1 Components in Elevated Temperature Service Subsection NCA and Appendices Division 2 Section II, Parts A, B, C, D |
| NV | Nuclear Safety and Pressure Relief Valves | Section III Subsection NCA and Appendices Section II: Parts A, B, D Section V Section IX PTC 25.(Latest mandatory edition) NQA-1 (Latest mandatory edition) May also require: Section III Subsection NB - Class 1 components Subsection NC - Class 2 components Subsection ND - Class 3 components Subsection NH - Class 1 component in Elevated Temperature Service |