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