ASME Boiler And Pressure Vessel Code
Section IRules for Construction of Power Boilers
ASME Boiler And Pressure Vessel Code
SectionsI Rules for Construction of Power
BoilersII Materials
Part A – Ferrous Material Specifications
Part B – Nonferrous Material Specifications
Part C – Specifications for Welding Rods, Electrodes, and Filler
Part D – Properties (Customary)Part D – Properties (Metric)
III Rules for Construction of Nuclear Facility components
Subsection NCA – General Requirements for Division 1 and Division 2
III Division 1Subsection NB – Class 1 ComponentsSubsection NC – Class 2 ComponentsSubsection ND – Class 3 ComponentsSubsection NE – Class MC ComponentsSubsection NF – SupportSubsection NG – Core Support StructuresSubsection NH – Class 1 Components in Elevated Temperature Service Appendices
III Division 2 – Code for Concrete Containments
III Division 3 – Containments for Transport and Storage of Spent Nuclear Fuel and High Level Radioactive Material and Waste
IV Rules for Construction of Heating Boilers
V Nondestructive ExaminationVI Recommended Rules for the Care of
Power Boilers
VII Recommended Guidelines for the Care of Power Boilers
VIII Rules for Construction of Pressure Vessels
Division 1Division 2 – Alternative RulesDivision 3 – Alternative Rules for
Construction of high Pressure Vessels
IX Welding and Brazing Qualifications
X Fiber-Reinforced Plastic Pressure Vessels
XI Rules for In-service Inspection of Nuclear Power Plant Components
XII Rules for Construction and Continued Service of Transport Tanks
ASME Boiler And Pressure Vessel CodeSection IContents
Part PG General requirements for all methods of construction• General• Materials• Design• Openings and Compensation• Boiler External Piping and Boiler Proper Connections• Design and Application• Safety Valves and Safety Relief Valves• Fabrication• Inspection and Tests• Certification by Stamping and Data Reports• Figures• Tables
PG-2 Service limitations
(a)Boilers in which steam or other vapor is generated at pressure of more than 15 psig (100 kPa)
(b) High temperature water boiler operated at pressure exceeding 160 psig (1.1 Mpa) and/or temperature exceeding 250̊ F (120̊ C)
PG-3 Referenced standards
The Manufacture shall establish the effective Code Edition, Addenda, and Code Case for boilers and replacement parts in accordance with Mandatory Appendix VI
Specific editions of standards referenced in this section are shown in table A-360
MANDATORY APPENDIX VI
Specific Edition of Standard
MATERIALS
• Except cast Iron, materials subject to stress due to pressure shall conform to the specification given in Section II and shall be limited those that are listed in the Table of Section II, Part D
Section II Part D Table 1A
DESIGN
• The design of power boiler, high temperature water boiler and all pressure parts included within the scope of this Section shall conform to the general requirements and in addition to the specific requirements for design given in the applicable Parts of this Section
MAXIMUM ALLOWABLE WORKING PRESSURE
• Maximum Allowable Working Pressure is the pressure determined by employing the allowable stress value, design rules, and dimensions designated in this Section.
• Whenever the term maximum allowable working pressure is used in this Section, it refer to gage pressure or the pressure above atmosphere.
Table 1A
Table 1A
PG-27 Cylindrical Components under Internal Pressure
PG-27 Cylindrical Components under Internal Pressure
Components under External Pressure
Section II D Figure G
DISHED HEADS
FLAT UNSTAYED HEAD and COVER
OPENING and COMPENSATION
LIMIT FOR PIPING
ASME Boiler And Pressure Vessel CodeSection IContents
Part PW Requirements for boilers fabricated by welding
• General• Materials• Design• Fabrication• Inspection and Tests• Figures• Tables
BUTT WELD JOINT DESIGN
VOLUMATIC EXAMINATION OF WELDED BUTT JOINT
HEAD ATTACHED TO SHELL
PROHIBITED WELDED JOINT
EXAMPLE OF WELD STRENGTH CALCULATION
EXAMPLE OF WELDED NOZZLE to SHELL, DRUM and HEADER
ACCEPTABLE and UNACCEPTABLE BRACES
POST WELD HEAT TREATMENT
HYDROSTATC TEST
• After a boiler has been completed it shall be subjected to pressure testing using water at not less than ambient temperature, but in no case less than 20 degree C
• Apply to the highest point of the boiler system
• Test pressure shall be not less than 1.5 X MAWP
HYDROSTATIC TEST
• The hydrostatic test pressure may then be reduced to MAWP
• Maintained at this pressure while the boiler is carefully examined
• The metal temperature shall not exceed 50 degree C. during the close visual examination
PART PWT
Requirements for Water tube Boilers- General- Materials- Design- Figures- Tables
PART PFT
Requirements for Fire tube Boilers- General- Materials- Design- Combustion Chambers- Stayed Surfaces- Doors and Openings- Domes- Setting
OTHERS• Part PMB: Requirements for Miniature Boilers• Part PEB: Requirements for Electric Boilers• Part PFE: Requirement for Feed Water
Economizer• Part PTFH: Requirement for liquid phase
Thermal Fluid Heaters• Part PHRSG: Requirements for Heat Recovery
Steam Generators