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Update on the comparison of selected issues of the ASME Code (Sect. VIII) with EN standards
Druckgerätetage, München, June 2011Dr. Robert Kauer / Dr. Jürgen [email protected]
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Content
Introduction
Updated considerations regarding- Material - Allowable stress values- Design Basics
Summary
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Content
Introduction
Updated considerations regarding- Material- Allowable stress values- Design Basics
Summary
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Some existing statements
Die europäische Druckbehälternorm EN 13445 – was lange währt …Veröffentlichung DIN Mitteilungen: Normenausschuss Chemischer Apparatebau (FNCA) im DIN, Feb. 2011
„und es deutet vieles darauf hin, dass sie mit steigender Akzeptanz im EWR auch auf internationalem Parkett eine führende Rolle spielen wird.“
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EC Comparative Study Results
Comparative Study on Pressure Equipment Standards, Summary, EC DG Enterprise, Contract No. FIF.20030114, July 2004
DBF: Design by FormulaDBA: Design by AnalysisPED: Pressure Equiment
Directive
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Some existing statements pro EN
*1) Comparative Study on Pressure Equipment Standards, Summary, EC DG Enterprise, Contract No. FIF.20030114, July 2004
The fracture toughness concept in the ASME is less
conservative
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European Regulation
Requirements for Construction and Design
- Design- Construction- Equipment- ...
Complete conversion (other national codes had to be repealed)
Pressure Equipment Directive(PED)
97/23/EG, 1997 (mand. 2002)
but old national code still in place likeAD-2000, BS 5500, CODAP
with some additional consideration also ASME
In-Service Requirements
- Service- Inspection- Testing- ...
National requirements had to be extended and adapted
e. g. GermanyBetrSichV
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ASME‘s legal standing
■ Legislation at the location of the plant(e.g. Minnesota, New York City, Quebec, Dubai, Sarawak, …)
Section IPower boiler
Section IIINuclear power
Section IVBoiler
Section VIIIPressure vessel
Section XFiber plastics
ASME Piping Code
ASME B31.1Power piping
ASME B31.3Process piping
Construction Codes
Reference Codes Section IIMaterial
Section VNDT
Section IXWelding/Brazing
“In-service”-Codes Section VIBoiler
Section VIISteam boiler
Section XINuclear power
Standards, recommendations ANSI ASTM AWS ASNT
■ Authority at the location of the plant with references to - National Board Inspection Code NBIC- API In-service Codes e.g. API 510
API
ASME Boiler & Pressure Vessel Code
NACE
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Some facts around ASME
1915 First ASME Boiler Code (now Sect. I)1924 First Unfired Pressure Vessel Code (now Sect. VIII)1963 First Proposal for Nuclear Code (Sect. III)1968 Alternative Rules for Unfired Pressure Vessels (Sect. VIII Div. 2)1997 High Pressure Code (Sect. VIII Div. 1)2007 Re-written Sect. VIII Div. 2
Today 28 books embedded into the US standardization system Continuously new editions published Code Case System
700 technical committees continuously working (consensus process)
Over 3800 Volunteers (~10% International)
Until 1971 certification activities limited to USA and Canada, meanwhile expanded to 75+ countries, accepted in 100+ countries, and translated into Chinese, French, Japanese, Korean, Portuguese, Spanish and Swedish
Strong relation to in-service initiatives and user groups like API, NACE, ….
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ASME Life Cycle Management
Risk Analysis and Inspection Planning
Codes/Standards
New Construction Codes and Standards
Inspection Findings?
Repair or Replace?
Repair or Replacement per In-Service Repair Codes and Standards
Sucessful?
Fitness for ServiceCodes and Standards
Decommission
Yes
Yes
YesNo
No
No
Results
Results
Inspect
Operate
Sect. VIIIAPI 620
PCC-3API 580API 510
NBIC API 579
PCC-2NBIC
API 510PTB-2-2009 Guide to Life Cycle Management of Pressure Vessel Integrity
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Content
Introduction
Updated considerations regarding- Material- Allowable stress values- Design Basics
Summary
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Material: Essential Safety Requirements
Source:http://ec.europa.eu/enterprise/sectors/pressure-and-gas/documents/ped/materials/index_en.htm
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PED: Particular Material Appraisal
Source:http://ec.europa.eu/enterprise/sectors/pressure-and-gas/documents/ped/materials/index_en.htm
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ASME Code: Listed Material, e.g. VIII-1
UNS (Unified Numbering System)Sxxxxx: Heat and corrosion resistant (stainless) steels
SA312
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Some Supplementary Requirements to SA-516
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Summary Material
Both systems (EN and ASME) generally allow the use of each other material
In case material shall be used in both systems dual certified material
To specify the material in a sufficient and economic way, specific comparison between the EN and ASME Specifications is required. Do not rely on general statements.
Material specification shall be mainly driven by the needs for the intended service (good sources are standards like API, NACE, Dechema, …)
Make use of supplementary requirements in the specifications.
Do not over-specify
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Specification example
Service susceptible to Polythonic Acid Stress Corrosion CrackingStabilizing Heat Treatment and IGC are recommendations from API and NACEstandards
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Content
Introduction
Updated considerations regarding- Material- Allowable stress values- Design Basics
Summary
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Allowable Stresses EN 13445
below the creep range
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Allowable Stresses ASME Sect. II Part D
ST Tensile strength at room temperatureSY Yield strength (0.2%) at room temperatureRT ratio of the average temperature dependent trend curve value of tensile strength to the room
temperature tensile strengthRY ratio of the average temperature dependent trend curve value of yield strength to the room
temperature yield strengthSRave Ave. rupture stress 100,000 hoursSRmin Min. rupture stress 100,000 hoursSC Ave. stress to cause a creep rate of 0.01%/1,000 hoursFavg Below 815°C = 0.67
for Sect. VIII, Div. 1
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Allowable Stresses ASME Sect. II Part D
for Sect. VIII, Div. 2
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Updated allowable stress value comparison
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Plate SA/EN 10028 P295GH and EN 13445 EN 10028 P295GH (1.0481)
EN 13445 Allowable (100 - 150 mm)
Sect. VIII Div. 1 Allowable (100 -150 mm) max: 500°Cmax: 538°C
23TÜV SÜD Industrie Service GmbH
Updated allowable stress value comparison
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Plate SA-516 Gr. 70 and P295GH (1.0481)
EN 13445 Allowable (< 16 mm)
EN 13445 Allowable (60 - 100 mm)
Sect. VIII Div. 2 Allowable
Sect. VIII Div. 1 Allowable max: 500°Cmax: 538°C
24TÜV SÜD Industrie Service GmbH
Updated allowable stress value comparison
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0 100 200 300 400 500 600 700 800
Allo
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Plate SA-240 304 and X5CrNi1810 (1.4301)
EN 13445 Allowable
Sect. VIII Div. 2 Allowable
Sect. VIII Div. 1 Allowable 0.9 SY
Sect. VIII Div. 1 Allowable
max: 550°C
max: 816°C
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Summary Allowable Stresses
Do not rely on general statements. Specifically compare the material at the intended temperature
When using the ASME code always consider the option for using Sect. VIII, Div. 2
When comparing austenitic steels also consider the 90% yield option provided for many materials
The ASME system is much less susceptible to user errors by providing simple tables with the allowable stresses (no need for calculation of the allowable stress)
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Content
Introduction
Updated considerations regarding- Material- Allowable stress values- Design Basics
Summary
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Design Concepts
EN 13445 ASME VIII-1 ASME VIII-2
Design by Formula √ √+ App. + Codes Cases √
Design by Analysis √ No, but U-1 √
Design by Fracture Mechanics √ No No
Loads other than Pressure √ No, but UG-22 √
Fatigue Design √ No, but UG-22 √
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Allowable Design Cycles
EN 13445 ASME VIII-2Example 3 33 576 > 5x106
Example 4 Batch 13 100 200x106
Example 4 Stirrer 212 000 > 1011
SNP-PT-007, Comparison of Pressure Vessel Codes ASME Section VIII and EN 13445, Technical, Commercial, and Usage Comparison, Design Fatigue Life Comparison
EN 13445 ASME VIII-2Example 3 RT+VT 33 576 N/A
Example 3 no NDT 8 600 6 450
Example 4 Batch 13 100 12 500
Example 4 Stirrer 212 000 1 100 000
29TÜV SÜD Industrie Service GmbH
Content
Introduction
Updated considerations regarding- Material- Allowable stress values- Design Basics
Summary
30TÜV SÜD Industrie Service GmbH
ASME Cost comparison (excerpt)
Cost
SNP-PT-007, Comparison of Pressure Vessel Codes ASME Section VIII and EN 13445, Technical, Commercial, and Usage Comparison, Design Fatigue Life Comparison
Costs in a Clean Fuel Project
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The ASME answer
Overall number of registrations on file at the end of 2010 was 45.713.776Comparison of Pressure Vessel Codes ASME Sect. VIII
and EN 13445, Technical, Commercial, and Usage Comparision, Design Fatigue Life ComparisonSTP-PT-007, Dec. 2006
National Board Bulletin, Fall 2010
0200000400000600000800000
1000000120000014000001600000
2006 2007 2008 2009 2010
1.495.632 1.572.626 1.563.665
1.357.3791.211.711
Total Number of Boilers and PV registered with the National Board
% ASME VIII-1
ASME VIII-2
Others
EN 13445
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Downstream new projects (in $ bn)
EIC Database
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ASME Stampholders
[1023][1004]
[20]
[3496][3467]
[1388][1087]
[116]
[14][9]
[28]
[ ] - 04/2011[ ] - 07/2010
[82][77]