ASME Boiler and Pressure Vessel Code (BPVC)

The ASME Boiler & Pressure Vessel Code (BPVC) is an American Society of Mechanical Engineers (ASME) standard that regulates the design and construction of boilers and pressure vessels.[1] The document is written and maintained by volunteers chosen for their technical expertise .[2] The American Society of Mechanical Engineers works as an Accreditation Body and entitles independent third parties such as verification, testing and certification agencies to inspect and ensure compliance to the BPVC.[3]

History

The BPVC was created in response to public outcry after several serious explosions in the state of Massachusetts. A fire-tube boiler exploded at the Grover Shoe Factory in Brockton, Massachusetts on March 20, 1905 which resulted in the deaths of 58 people and injured 150. Then on December 6, 1906 a boiler in the factory of the P.J. Harney Shoe Company exploded in Lynn, Massachusetts. As a result, the state of Massachusetts enacted the first legal code based on ASME's rules for the construction of steam boilers in 1907.[4][5]

ASME convened the Board of Boiler Rules before it became the ASME Boiler Code Committee which was formed in 1911. This committee put in the form work for the first edition of the ASME Boiler Code - Rules for the Construction of Stationary Boilers and for the Allowable Working Pressures, which was issued in 1914 and published in 1915.[5]

The first edition of the Boiler and Pressure Vessel Code, known as the 1914 edition, was a single 114-page volume.[6][7] It developed over time into the ASME Boiler and Pressure Vessel code, which today has over 92,000 copies in use, in over 100 countries around the world.[5] As of March 2011 the document consisted of 16,000 pages in 28 volumes.[7]

After the first edition of the Code, the verifications that the manufacture was to the Code was performed by independent inspectors, which resulted in a wide range of interpretations. Hence in February 1919, the National Board of Boiler and Pressure Vessel Inspectors was formed.[5]

ASME BPVC TIMELINE[5][8]
Year Activity
1880 The American Society of Mechanical Engineers is founded
1884 First performance test code: Code for the Conduct of Trials of Steam Boilers
1900 First revision of an ASME standard, Standard Method of Conducting Steam Boiler Tests
1911 Establishment of a committee to propose a Boiler Code
1913 New Committee to revise the Boiler Code
1914 Issuance of the first Boiler Code
1915 Standards for Specifications and Construction of Boilers and Other Containing Vessels in Which High Pressure is Contained
1919 National Board of Boiler and Pressure Vessel Inspectors formed
1924 Code for Unfired Pressure Vessels
1930 Test Code of Complete Steam-Electric Power Plants
1956 Committee established for ASME Pressure Vessel Code for Nuclear Age
1963 Section III (Nuclear Power) of ASME Boiler and Pressure Vessel Code
1968 ASME Nuclear Power Certificate of Authorization Program commences
1972 ASME expands its certification program worldwide; first ASME manufacturer certification issued outside of North America
1978 First ASME publication of Boiler and Pressure Vessel Committee interpretations
1983 ASME Boiler and Pressure Vessel Code published in both conventional and metric units
1989 Boiler and Pressure Vessel Code published on CD-ROM
1992 First Authorized Inspection Agency accredited
1996 Risk technology introduced into the Boiler and Pressure Vessel Code
1997 High Pressure Vessel Code
2000 C&S Connect (on-line balloting and tracking system) launched for Boiler and_Pressure Vessel Committees
2007 ISO TC11 Standard 16528—Boilers and Pressure Vessels published, establishing performance requirements for the construction of boilers and pressure vessels and facilitating registration of BPV Codes to this standard
2008 Polyethylene plastic pipe introduced into the Boiler and Pressure Vessel Code, Section III
2009 ASME Boiler and Pressure Vessel Committee reorganized from one consensus body to ten consensus bodies

Code Sections

LIST OF SECTIONS[9]

  • Part A - Ferrous Material Specifications
  • Part B - Nonferrous Material Specifications
  • Part C - Specifications for Welding Rods, Electrodes and Filler Metals
  • Part D - Properties (Customary)
  • Part D - Properties (Metric)
  • Subsection NCA - General Requirements for Division 1 and Division 2
  • Division 1
  • 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
  • Appendices
  • Division 2 - Code for Concrete Containments
  • Division 3 - Containments for Transportation and Storage of Spent Nuclear Fuel and High Level Radioactive Material and Waste
  • Subsection WA - General Requirements for Division 3
  • Subsection WB - Class TP (Type B) Containment
  • Subsection WC - Class SC storage Containments
  • Division 4 - Reserved for fusion reactors (Not Active)
  • Division 5 - Construction rules for high temperature reactors (Not Active)
  • Subsection HA - General Requirements
  • Subsection HB - Class A Metallic Pressure Boundary Components
  • Subsection HC - Class B Metallic Pressure Boundary Components
  • Subsection HF - Class A and B Metallic Supports
  • Subsection HG - Class A Metallic Core Support Structures
  • Subsection HH - Class A Non-Metallic Core Support Structures
  • Division 1
  • Division 2 - Alternative Rules
  • Division 3 - Alternative Rules for Construction of High Pressure Vessels

ADDENDA

Addenda, which include additions and revisions to the individual Sections of the Code, are issued accordingly for a particular edition of the code up until the next edition.[9]

INTERPRETATIONS

ASME's interpretations to submitted technical queries relevant to a particular Section of the Code are issued accordingly. Interpretations are also available through the internet.[10]

CODES CASES

Code Cases provide rules that permit the use of materials and alternative methods of construction that are not covered by existing BPVC rules.[11] For those Cases that have been adopted will appear in the appropriate Code Cases book: "Boilers and Pressure Vessels" and "Nuclear Components."[9]

Codes Cases are usually intended to be incorporated in the Code in a later edition. When it is used, the Code Case specifies mandatory requirements which must be met as it would be with the Code. There are some jurisdictions that do not automatically accept Code Cases.[9]

ASME BPVC Section II - Materials

The section of the ASME BPVC consists of 4 parts.

Part A - Ferrous Material Specifications

This Part is a supplementary book referenced by other sections of the Code. It provides material specifications for ferrous materials which are suitable for use in the construction of pressure vessels.[12]

The specifications contained in this Part specify the mechanical properties, heat treatment, heat and product chemical composition and analysis, test specimens, and methodologies of testing. The designation of the specifications start with 'SA' and a number which is taken from the ASTM 'A' specifications.[12]

Part B - Nonferrous Material Specifications

This Part is a supplementary book referenced by other sections of the Code. It provides material specifications for nonferrous materials which are suitable for use in the construction of pressure vessels.[12]

The specifications contained in this Part specify the mechanical properties, heat treatment, heat and product chemical composition and analysis, test specimens, and methodologies of testing. The designation of the specifications start with 'SB' and a number which is taken from the ASTM 'B' specifications.[12]

Part C - Specifications for Welding Rods, Electrodes, and Filler Metals

This Part is a supplementary book referenced by other sections of the Code. It provides mechanical properties, heat treatment, heat and product chemical composition and analysis, test specimens, and methodologies of testing for welding rods, filler metals and electrodes used in the construction of pressure vessels.[12]

The specifications contained in this Part are designated with 'SFA' and a number which is taken from the American Welding Society (AWS) specifications.[12]

Part D - Properties (Customary/Metric)

This Part is a supplementary book referenced by other sections of the Code. It provides tables for the design stress values, tensile and yield stress values as well as tables for material properties (Modulus of Elasticity, Coefficient of heat transfer et al.)[12]

ASME BPVC Section III - Rules for Construction of Nuclear Facility Components

Section III of the ASME Code Address the rules for construction of nuclear facility components and supports. The components and supports covered by section III are intended to be installed in a nuclear power system that serves the purpose of producing and controlling the output of thermal energy from nuclear fuel and those associated systems essential to safety of nuclear power system. Section III provides requirements for new construction of nuclear power system considering mechanical and thermal stresses due to cyclic operation. Deterioration, which may occur in service as result of radiation effects, corrosion, or instability of the material, is typically not addressed.

  • NCA-1000 Scope of Section III
  • NCA-2000 Classification of Components and Supports
  • NCA-3000 Responsibilities and Duties
  • NCA-4000 Quality Assurance
  • NCA-5000 Authorized Inspection
  • NCA-8000 Certificates, Nameplates, Code Symbol Stamping, and Data Reports
  • NCA-9000 Glossary
  • Subsection NB Class 1 components (Those components that are part of the fluid-retaining pressure boundary of the reactor coolant system. Failure of this pressure boundary would violate the integrity of the reactor coolant pressure boundary)
  • Reactor Pressure Vessel
  • Pressurizer Vessel
  • Steam Generators
  • Reactor Coolant Pumps
  • Reactor Coolant Piping
  • Line Valves
  • Safety Valves
  • Subsection NC Class 2 components (Those components that are not part of the reactor coolant pressure boundary, but are important for reactor shutdown, emergency core cooling, post-accident containment heat removal, or post-accident fission product removal)
  • Emergency Core Cooling
  • Post Accident Heat Removal
  • Post Accident Fission Product Removal
  • Includes Vessels, Pumps, Valves, Piping, Storage Tanks, and Supports
  • Subsection ND Class 3 components (Those components that are not part of class 1 or 2 but are important to safety)
  • Cooling Water Systems
  • Auxiliary Feedwater Systems
  • Includes Vessels, Pumps,Valves, Piping, Storage Tanks, and Supports
  • Subsection NE Class MC supports
  • Containment Vessel
  • Penetration Assemblies (Does not include piping, pumps and valves which if passing through thecontainment must be class 1 or class 2)
  • Subsection NF Supports
  • Plate and Shell Type
  • Linear Type
  • Standar Supports
  • Support Class is the class of the Component Supported
  • Subsection NG Core Support Structures (class CS)
  • Core Support Structures
  • Reactor Vessel Internals
  • Subsection NH Class 1 Components in Elevated Temperature Service (Those components that are used in elevated temperature service)
  • Elevated Temperature Components
  • Service Temperature over 800°F

ASME BPVC Section V - Nondestructive Examination

The section of the ASME BPVC contains the requirements for nondestructive examinations which are referred and required by other sections of the Code.[14]

The section also covers the suppliers examination responsibilities, requirements of the authorized inspectors (AI) as well as the requirements for the qualification of personnel, inspection and examinations.[14][15]

ASME BPVC Section VIII - Rules for Construction of Pressure Vessels

The section of the ASME BPVC consists of 3 divisions.[16]

ASME Section VIII Division 1

This division covers the mandatory requirements, specific prohibitions and nonmandatory guidance for materials, design, fabrication, inspection and testing, markings and reports, overpressure protection and certification of pressure vessels having an internal or external pressure which exceeds 15 psi (100 kPa).[9]

The pressure vessel can be either fired or unfired.[16] The pressure may be from external sources, or by the application of heating from an indirect or direct source, or any combination thereof.[9]

The Division is not numbered in the traditional method (Part 1, Part 2 etc.) but is structured with Subsections and Parts which consist of letters followed by a number. The structure is as follows:[9]

  • Part UG - General Requirements for All Methods of Construction and All Materials
  • Materials: UG-4 through to UG-15
  • Design: UG-16 through to UG-35
  • Openings and Reinforcements: UG-36 through to UG-46
  • Braced and Stayed Surfaces: UG-47 through to UG-50
  • Fabrication: UG-75 through to UG-85
  • Inspection and Tests: UG-90 through to UG-103
  • Marking and Reports: UG-115 through to UG-120
  • Overpressure Protection: UG125 through to UG-140
  • Part UW - Requirements for Pressure Vessels Fabricated by Welding
  • General: UW-1 through to UW-3
  • Materials: UW-5
  • Design: UW-8 through to UW-21
  • Fabrication: UW-26 through to UW-42
  • Inspection and Tests: UW-46 through to UW-54
  • Marking and Reports: UW-60
  • Pressure Relief Devices: UW-65
  • Part UF - Requirements for Pressure Vessels Fabricated by Forging
  • General: UF-1
  • Materials: UF-5 through to UF-7
  • Design: UF-12 through to UF-25
  • Fabrication: UF-26 through to UF-43
  • Inspection and Tests: UF-45 through to UF-55
  • Marking and Reports: UF-115
  • Pressure Relief Devices: UF-125
  • Part UB - Requirements for Pressure Vessels Fabricated by Brazing
  • General: UB-1 through to UB-3
  • Materials: UB-5 through to UB-7
  • Design: UB-9 through to UB-22
  • Fabrication: UB-30 through to UB-37
  • Inspection and Tests: UB-40 through to UB-50
  • Marking and Reports: UB-55
  • Pressure Relief Devices: UB-60
  • Part UCS - Requirements for Pressure Vessels Constructed of Carbon and Low Alloy Steels
  • General: UCS-1
  • Materials: UCS-5 through to UCS-12
  • Design: UCS-16 through to UCS-57
  • Low Temperature Operation: UCS-65 through to UCS-68
  • Fabrication: UCS-75 through to UCS-85
  • Inspection and Tests: UCS-90
  • Marking and Reports: UCS-115
  • Pressure Relief Devices: UCS-125
  • Nonmandatory Appendix CS: UCS-150 through to UCS-160
  • Part UNF - Requirements for Pressure Vessels Constructed of Nonferrous Materials
  • General: UNF-1 through to UNF-4
  • Materials: UNF-5 through to UNF-15
  • Design: UNF-16 through to UNF-65
  • Fabrication: UNF-75 through to UNF-79
  • Inspection and Tests: UNF-90 through to UNF-95
  • Marking and Reports: UNF-115
  • Pressure Relief Devices: UNF-125
  • Appendix NF: Characteristics of the Nonferrous Materials (Informative and Nonmandatory)
  • Part UHA Requirements for Pressure Vessels Constructed of High Alloy Steel
  • General: UHA-1 through to UHA-8
  • Materials: UHA-11 through to UHA-13
  • Design: UHA-20 through to UHA-34
  • Fabrication: UHA-40 through to UHA-44
  • Inspection and Tests: UHA-50 through to UHA-52
  • Marking and Reports: UHA-60
  • Pressure Relief Devices: UHA-65
  • Appendix HA: Suggestions on the Selection and Treatment of Austenitic Chromium–Nickel and Ferritic and Martensitic High Chromium Steels (Informative and Nonmandatory)
  • Part UCI - Requirements for Pressure Vessels Constructed of Cast Iron
  • General: UCI-1 through to UCI-3
  • Materials: UCI-5 through to UCI-12
  • Design: UCI-16 through to UCI-37
  • Fabrication: UCI-75 through to UCI-78
  • Inspection and Tests: UCI-90 through to UCI-101
  • Marking and Reports: UCI-115
  • Pressure Relief Devices: UCI-125
  • Part UCL - Requirements for Welded Pressure Vessels Constructed of Material With Corrosion Resistant Integral Cladding, Weld Metal Overlay Cladding, or With Applied Linings
  • General: UCL-1 through to UCL-3
  • Materials: UCL-10 through to UCL-12
  • Design: UCL-20 through to UCL-27
  • Fabrication: UCL-30 through to UCL-46
  • Inspection and Tests: UCL-50 through to UCL-52
  • Marking and Reports: UCL-55
  • Pressure Relief Devices: UCL-60
  • Part UCD - Requirements for Pressure Vessels Constructed of Cast Ductile Iron
  • General: UCD-1 through to UCD-3
  • Materials: UCD-5 through to UCD-12
  • Design: UCD-16 through to UCD-37
  • Fabrication: UCD-75 through to UCD-78
  • Inspection and Tests: UCD-90 through to UCD-101
  • Marking and Reports: UCD-115
  • Pressure Relief Devices: UCD-125
  • Part UHT Requirements for Pressure Vessels Constructed of Ferritic Steels With Tensile Properties Enhanced by Heat Treatment.
  • General: UHT-1
  • Materials: UHT-5 through to UHT-6
  • Design: UHT-16 through to UHT-57
  • Fabrication: UHT-75 through to UHT-86
  • Inspection and Tests: UHT-90
  • Marking and Reports: UHT-115
  • Pressure Relief Devices: UHT-125
  • Part ULW Requirements for Pressure Vessels Fabricated by Layered Construction
  • Introduction: ULW-1 through to ULW-2
  • Materials: ULW-5
  • Design: ULW-16 through to ULW-26
  • Welding: ULW-31 through to ULW-33
  • Nondestructive Examination of Welded Joints: ULW-50 through to ULW-57
  • Fabrication: ULW-75 through to ULW-78
  • Inspection and Tests: ULW-90
  • Marking and Reports: ULW-115
  • Pressure Relief Devices: ULW-125
  • Part ULT Alternative Rules for Pressure Vessels Constructed of Materials Having Higher Allowable Stresses at Low Temperature
  • General: ULT-1 through to ULT-5
  • Design: ULT-16 through to ULT-57
  • Fabrication: ULT-76 through to ULT-86
  • Inspection and Tests: ULT-90 through to ULT-100
  • Marking and Reports: ULT-115
  • Pressure Relief Devices: ULT-125
  • Part UHX - Rules for Shell-and-Tube Heat Exchangers
  • Part UIG - Requirements for Pressure Vessels Constructed of Impregnated Graphite
  • General: UIG-1 through to UIG-3
  • Materials: UIG-5 through to UIG-8
  • Design: UIG-22 through to UIG-60
  • Fabrication: UIG-75 through to UIG-84
  • Inspection and Tests: UIG-90 through to UIG-112
  • Marking and Reports: UIG-115 through to UIG-121
  • Pressure Relief Devices: UIG-125

Division 2 - Alternative Rules

This division covers the mandatory requirements, specific prohibitions and nonmandatory guidance for materials, design, fabrication, inspection and testing, markings and reports, overpressure protection and certification of pressure vessels having an internal or external pressure which exceeds 15 psi (103 kPa).[17]

The pressure vessel can be either fired or unfired.[16] The pressure may be from external sources, or by the application of heating from an indirect or direct source as a result of a process, or any combination of the two.[17]

The rules contained in this section can be used as an alternative to the minimum requirements specified in Division 1. Generally the Division 2 rules are more onerous than in Division 1 with respect to materials, design and nondestructive examinations but higher design stress intensity values are allowed.[16] Division 2 has also provisions for the use of finite element analysis to determine expected stress in pressure equipment, in addition to the traditional approach of design by formula (Part 5: "Design by Analysis requirements").

Division 3 - Alternative Rules for Construction of High Pressure Vessels

This division covers the mandatory requirements, specific prohibitions and nonmandatory guidance for materials, design, fabrication, inspection and testing, markings and reports, overpressure protection and certification of pressure vessels having an internal or external pressure which exceeds 10,000 psi (70,000 kPa).[18]

The pressure vessel can be either fired or unfired.[16] The pressure may be from external sources, by the application of heating from an indirect or direct source, process reaction or any combination thereof.[18]

See also

References

  1. ↑ Antaki, George A. (2003). Piping and pipeline engineering: design, construction, maintenance, integrity, and repair. Marcel Dekker Inc.
  2. ↑ ASME Codes and Standards
  3. ↑ Boiler and Pressure Vessel Inspection According to ASME
  4. ↑ Balmer, Robert T (2010). Modern Engineering Thermodynamics. 13.10 Modern Steam Power Plants: Academic Press. p. 864. ISBN 978-0-12-374996-3.
  5. 1 2 3 4 5 Varrasi, John (June 2009). "To Protect and Serve - Celebrating 125 Years Of Asme Codes & Standards". MEMagazine.
  6. ↑ Canonico, Domenic A. (February 2000). "The Origins of ASME's Boiler and Pressure Vessel Code". MEMagazine.
  7. 1 2 "The History of ASME's Boiler and Pressure Vessel Code". ASME. March 2011. Retrieved 24 July 2015.
  8. ↑ "Standards and Certification Chronology". History of ASME Standards. ASME. Retrieved 10 November 2011.
  9. 1 2 3 4 5 6 7 An International Code - 2010 ASME Boiler & Pressure Vessel Code Section VIII Rules for Construction of Pressure Vessels - Division 1. ASME. July 1, 2011.
  10. ↑ "Codes & Standards Interpretations On-Line". Codes and Standards Electronic Tools. ASME International. Retrieved 10 November 2011.
  11. ↑ "Code Cases of the ASME Boiler and Pressure Vessel Code". ASME. Retrieved 7 November 2011.
  12. 1 2 3 4 5 6 7 "II. Materials". Boiler and Pressure Vessel Code - 2010 Edition. ASME. Retrieved 9 November 2011.
  13. ↑ §
  14. 1 2 "V. Nondestructive Examinations". Boiler and Pressure Vessel Code - 2010 Edition. ASME. Retrieved 9 November 2011.
  15. ↑ §§§§
  16. 1 2 3 4 5 "VIII. Pressure Vessels - Division 1". Boiler and Pressure Vessel Code - 2010 Edition. ASME. Retrieved 9 November 2011.
  17. 1 2 An International Code - 2010 ASME Boiler & Pressure Vessel Code Section VIII Rules for Construction of Pressure Vessels - Division 2: Alternative Rules. ASME. July 1, 2011.
  18. 1 2 An International Code - 2010 ASME Boiler & Pressure Vessel Code Section VIII Rules for Construction of Pressure Vessels - Division 3: Alternative Rules for Construction of High Pressure Vessels. ASME. July 1, 2011.
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