ASME Mexico Workshop - Section VIII - R3 - Presenation

ASME Standards Workshop – Latest Developmentsin ASME Section VIII, Divisions 1 and 2, 2010 Edition

May 22, 2012

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Latest Developments in ASME Section VIIILatest Developments in ASME Section VIII, Divisions 1 and 2, 2010 Edition

May 22, 2012

Presented by: Thomas P. PastorPresented by: Thomas P. Pastor

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May 22, 2012

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Agenda

• What’s New in ASME• What s New in ASME• Major Revisions to Section VIII, Div. 1

– 2010 Edition– 2010 Edition, 2011 Addenda

• Recent Code Cases

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Recent Code Cases• A Review of Recent Interpretations

What’s New in ASME ?New Publication Schedule

• 2011 Publication– ASME published complete reprints (white pages) for all B&PV Code p p p ( p g )

books– Some books were published with their old software and some with

new software (xml)– Even though it is a complete reprint, it is considered an Addenda

• On Data Reports, “2010 Edition” and “2011 Addenda” would be listed, not like when the 1998 Edition came out

• Next publication will be the 2013 Edition– No Addenda in 2012

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– Code Cases will still be published quarterly– Errata will be published on ASME website as soon as approved– “Special Safety Notices” may be published on website– Can subscribe to notifications on website


May 22, 2012

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What’s New in ASME ?ASME Single Mark

• Code Symbol Stamph d t t t ( h th U) f h– phased out separate stamps (such as the U) for each

Code – Moved to a single mark for all codes– new term: "Certification Designator “or “Designator“

defines the area in which the Certificate Holder is certified by ASME

– For example, for VIII-1, "U" , "UV" or "UD“ marked on the nameplate directly under the Certification Mark

– Non-nuclear Code Case for 18 month transition

U

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Non nuclear Code Case for 18 month transition• 2710 (I, IV, X, XII), 2714 (VIII)• See Code Services Discussion database postings for further

details– Numerous errata in 2011 Addenda– ASME posted FAQ’s regarding use of the new Mark.

What’s New in ASME ?Temporary Shop Certificate

• Code Construction at Location Other than that Listed on CertificateCertificate– Certificate Holder may request ASME to authorize code

construction at another location• Intended for situations where Cert. Holder needs additional

production space to handle overflow work, or perhaps access to a larger crane

– Certificate Holder would apply to ASME requesting permission to fabricate at additional location (temporary shop)ASME would request AIA to audit Temporary Shop and verify

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– ASME would request AIA to audit Temporary Shop and verify that it is suitable for intended construction activity

– Following receipt of the AIA’s audit report, ASME may issue a Letter authorizing temporary use of a new shop location for a period of not longer than one year or to the time the Certificate Holder’s Certificate will expire


May 22, 2012

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• Temporary Shop Used by Certificate HoldersTemporary Shop Used by Certificate Holders (cont.)– ASME accepts AIA audit report and $1,305 fee– ASME will issue to the Certificate Holder a Letter– Upon expiration of the letter, further extension to

allow the temporary shop to continue operation will require a full ASME review prior to the

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equ e a u S e e p o to t eexpiration of the authorization

– No more than one temporary use Letter issued to a Certificate Holder at any one time and no more than two temporary use letters issued during a three year period


• Temporary Shop Used by Certificate Holders ( )(cont.)– If two temporary use letters are issued during the

three year period they must be for different temporary shop locations (i.e. during the three year period a temporary shop address would be eligible for only (1) one-year temporary use letter). AIS m st indicate in thei epo t ho the

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– AIS must indicate in their report how the Certificate Holder’s assigned AI/AIS will perform inspections at the temporary Code shop, when the “temporary Code shop” is located a distance greater than 200 miles from the Code shop


May 22, 2012

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• Temporary Shop Used by Certificate Holders ( )(cont.)– The address, Certificate Number and expiration

date of the Manufacturer to be listed on the Data Report would be that of the Certificate of Authorization, not the temporary location.

• The Temporary Location Letter expiration date could(but is not required to) be listed in the Remarks.

This new policy does not affect work done at a

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– This new policy does not affect work done at a temporary, intermediate site location, where the “intermediate” part of that statement means a ship dock, rail yard, etc. where pieces of the pressure vessel are further assembled before being shipped to the final location.


• Temporary Shop Used by Certificate p y p yHolders (cont.)– See Interpretations below

• Interpretation: VIII-1-01-142• Interpretation: VIII-1-95-127R• Interpretation: VIII-1-01-53

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Interpretation: VIII 1 01 53


May 22, 2012

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Revisions from the 2010 EditionSection VIII, Division 1

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Important Revisions in 2010 EditionSection VIII, Division 1

• UG-45 – Simplification of Rules• UG 45 Simplification of Rules– Nozzle neck sizing rules of UG-45 are often

misinterpreted– New rules modeled after those published in

VIII-2– Simpler presentation however requires an

understanding of min/max rules

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understanding of min/max rules.– Min. Thickness of standard wall pipe now

acquired from Table, instead of looking up in handbook


May 22, 2012

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UG-45 Nozzle Neck Sizing

• The minimum wall thickness of nozzle necks shall be determined i b las given below:

For access openings and openings used only for inspection:

tUG-45 = ta

For other nozzles:

Determine tb.

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b

tb = min{tb3, max( tb1 , tb2)}

tUG-45 = max (ta , tb)

UG-45 Nozzle Neck Sizingta = nozzle required thicknesstb1 = shell/head required thickness for internal

ta

tb1, tb2

pressuretb2 = shell/head required thickness for external pressuretb3 = min wall thickness of pipe from Table UG-45

Table UG-45 Min Thickness Values

Nominal Size in

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1/8 in.(6 DN) ≤ NNS < 1/4 in. (8 DN) 0.0601/4 in. (8 DN) ≤ NNS < 3/8 in. (10 DN) 0.0773/8 in.(10 DN) ≤ NNS < 1/2 in. (15 DN) 0.0801/2 in. (15 DN) ≤ NNS < 3/4 in. (20 DN) 0.0953/4 in. (20 DN) ≤ NNS < 1 in. (25 DN) 0.0991 in. (25 DN) ≤ NNS < 1 1/4 in. (32 DN) 0.116

EXAMPLE


May 22, 2012

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Important Revisions in 2010 EditionSection VIII, Division 1

• UG-19(a)(2) – design temperature for “common element” (e.g. ( )( ) g p ( gH/X tubes) based on mean wall temperature– Paragraph first published in 2006 Addenda– Result of Intent Interpretation VIII-1-04-68– Later review of paragraph and interpretation identified problems

with wording– Interpretation was revised: VIII-1-04-68R– New words in UG-19(a)(2) [Note, paragraph number was also

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changed to UG-19(a)(3) ] “When mean metal temperature design is used, the maximum common element design temperature determined in accordance with UG-20(a) may be less than the greater of the maximum design temperatures of its adjacent chambers; however, it shall not be less than the lower of the maximum design temperatures of its adjacent chambers”

UG-19(a)(3) Example

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• Tubes – SB-359 Mean wall design temperature = 145°F, based on heat transfer calculations

• Therefore, Appendix 23 may be used to establish maximum allowable external working pressure


May 22, 2012

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Important Revisions in 2010 EditionSection VIII-1

• UG-116(j), UG-120(b), UHX-19– Marking and data report rules revised based

on the clarifications to Paragraph UG-19(a)(3). UG-116 REQUIRED MARKING(j) Either of the following arrangements may be used in marking vessels having two or more independent pressure chambers designed for the same or different operating conditions. Each detachable chamber shall be marked so as to identify it positively with the combined unit.(1) The marking may be grouped in one location on the vessel provided it is arranged so

as to indicate clearly the data applicable to each chamber. This includes the following,

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y pp g,as applicable:

(a) for differential pressure design, the maximum differential design pressure for each common element [see UG-19(a)(2) and UHX-19.2.1(a)] (b) for mean metal temperature design, the maximum mean metal design temperature

for each common element [see UG-19(a)(3) and UHX-19.2.1(b)].


• UW-2(c) – Use of ERW Pipe as the Shell in an ( ) pUnfired Steam Boiler– Current rules require all joints of Category A to be fully

radiographed.– Code considers ERW pipe to have a Category A joint– Revision makes rules consistent with Section I (PG-9.5

& Part PEB) and the use of ERW pipe material– ERW pipe may be used as the shell of a unfired steam

boile

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boiler• t < ½ in.• Diameter shall not exceed 24 inches ( DN 600)• ERW weld shall be completed using high-frequency

induction (HFI) welding.


May 22, 2012

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• Appendix 2, Bolt Spacing Correction Factorpp , p g– Maximum bolt spacing and a bolt spacing correction factor

are being added to the flange design rules– New rules only apply to

• vessels in lethal service• And when specified by the user or designated agent

Max. Bolt Spacing 5.0

62max

m

taBs

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When bolt spacing, Bs > 2a + t, multiply Mo by the bolt spacing correctionfactor, BSC

ta

BB S

SC

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Revisions from the 2011 AddendaSection VIII, Division 1

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May 22, 2012

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Important Revisions in 2011 AddendaSection VIII, Division 1

• UG-11 – Prefabricated or Preformed Pressure Parts– Complete rewrite of paragraph– Combination of restructuring existing requirements, significant

clarifications and additional rules– NET RESULT - clearer rules may be viewed as “new rules”

• Major changes include:– Emphasis that all UG-11 parts must comply with applicable rules,

including design– Each part must be supported by documentation to demonstrate

Code compliance relative to materials, basis for P/T rating, welding

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p , / g, gcomplies with Section IX

– Cert. Holder can fabricate parts to internal Manufacturer’s Standard

– Cert. Holder can subcontract welded part fabrication to a non-certificate holder


• UG-90(c)(1)(n) – “acceptance by the Inspector”– Statement added that by the Inspector’s

acceptance, an Inspector does not assume any responsibilities that belong to the Manufacturer

• Statement originally published in Appendix 3

• UG-93 and App 3 – material documentation– UG-93(a)(1): expanded documentation

i t f l t t i l

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requirements for plate material– App 3: revised definition of “certificate of

compliance”, “material”, “material supplier” and “Material Test Report”


May 22, 2012

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• UW-11(a) – Requirements for full radiography( ) q g p y– Rewrite of UW-11(a)(1) through (a)(4) [See VIII-1-07-14]– Revisions prompted by inquiry– Changes involve:

• UW-11(a)(2) – changed “vessels” to “shell and heads of vessels” to be consistent with UW-11(a)(1); also relocated small nozzle and communicating chamber exemption to UW-11(a)(4)

• UW-11(a)(3) – Added coverage for unfired steam boilers with design pressure < 50 psi (350 kPa)

• Separate full radiography requirements for nozzles and

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p g p y qcommunicating chambers from vessels [UW-11(a)(2)] and place the requirements in UW-11(a)(4)

– Net Result Unfired steam boiler with P < 50 psi and thickness at welded joint exceeding thickness limits defined in UW-11(a)(2) will require Full RT

Interpretation VIII-1-07-14

Interpretation: VIII-1-07-14S bj t Section VIII Division 1 (2004 Edition); UW 11(a)(2)Subject: Section VIII, Division 1 (2004 Edition); UW-11(a)(2)Date Issued: December 5, 2006File: BC06-783

Question (1): Do Parts UCS, UNF, or UHA nozzles larger than NPS 10 with wall thickness less than 1-1/8 in. and no Category B or C butt weld in the nozzle require radiography in accordance with UW-11(a)?

Reply (1): No.

Question (2): Do Parts UCS, UNF, or UHA nozzles NPS 10 or smaller with wall thickness greater than 1-1/8 in. require radiography in accordance with UW-11(a), where a Category B or C butt weld is in the nozzle?

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nozzle?

Reply (2): Yes.

Question (3): Do Parts UCS, UNF, or UHA nozzles larger than NPS 10 with wall thickness less than 1-1/8 in. require radiography in accordance with UW-11(a), where a Category B or C butt weld is in the nozzle?

Reply (3): Yes.


May 22, 2012

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• UW-21 – use of B16.5 flangesUW 21 use of B16.5 flanges– Code change and Intent Interpretation – rules

apply to B16.5 socket and slip-on flange welds, no matter where they are installed on the vessel

• Question: Is it the intent that the socket and slip-on flange attachment details given in Fig. UW-21 for ASME B16.5 flanges apply only to attachments to nozzle necks?

Reply: No; These attachment details shall be used

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p y ;wherever an ASME B16.5 slip on flange is used on a Section VIII, Division 1 vessel.

– Note: The revision to Fig. UW-21 shows that the dimensional requirement of the ID fillet weld is only for sizing the weld.


• UW-50 – pneumatic test NDEp– clarify that the required NDE is to take place prior to

pneumatic testing• UW-51(a)(4) – incorporation of CC 2235 (UT)

– Refers to VIII-2 paragraph 7.5.5 for UT procedure, flaw evaluation and acceptance criteria

– UT may be used for t > ½ in. (13mm)– VIII-1 Cert. Holder will need to purchase VIII-2 for UT

rules

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• UB-30 – subcontracted brazers– Made consistent with UW-26(d)– permit subcontracted brazers only at the location(s) at

which ASME has authorized the Manufacture to do work


May 22, 2012

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• UHA-51(a)(4) – toughness @ < -320F (-196C)– Added Type 308L filler metal with GTAW or

GMAW– Editorial error to UHA-51(a)(4)(a) should read “If using Types 308L or

316L filler metal:”– Errata in 2011 Addenda

• UCS-5(c) – carbon content limit for welding [>0 35%]

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welding [>0.35%]– clarify the applicability of the parenthetical

statement at the end of the paragraph to only the provisions of Part UF


• Appendix 23 – copper alloy tubespp pp y– Previous design temperature limit was 150F

(65C)– Revised to the lower of the maximum

temperature listed in Table 1B of Section II-D or the material external pressure chart

– consistent with the temperature limits indicated in the copper NFC external pressure charts of

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in the copper NFC external pressure charts of Subpart 3 of Section II, Part D

– The external pressure test temperature will be at the design temperature, or factor "F" in 23-3 (b) is adjusted accordingly


May 22, 2012

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• Appendix 35 – Mass Produced Vessels– For the inspection and quality control procedure and QualityFor the inspection and quality control procedure and Quality

Control System, the Manufacturer shall submit to:• the AIA of record, legal jurisdiction, ASME Designee

– Mfg. now responsible to submit inspection and quality control procedure to the legal jurisdiction and ASME Designee

– The Manufacturer shall follow the same procedure when revising the inspection and quality control procedure.

• New Mandatory Appendix 41 – electric immersion heater element support plates– Based on Part UHX for U-tubes

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Based on Part UHX for U tubes– Significant reduction in calculated thickness using Appendix 41

rules• New Mandatory Appendix 42 – Diffusion Bonding

– Incorporates Code Case 2621-1

Section VIII, Division 1 Case 2695

• Case to Permit Use of Section VIII, Division 2Case to Permit Use of Section VIII, Division 2 Part 4 Rules for Section VIII, Division 1 Vessel– Part of “Common Rules” project– Provides access to VIII-2 design-by-rule (DBR)

Part 4 rules to an VIII-1 Certificate Holder– Many reasons to use VIII-2 Part 4 design rules

• Thinner formed heads

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Thinner formed heads• Reduced opening reinforcement• Thinner shells subject to full vacuum and other

compressive stress loading conditions• More accurate cone-to-cylinder designs


May 22, 2012

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Section VIII, Division 1 Case 2695

• Must use VIII-1 tensile allowable stressesMust use VIII 1 tensile allowable stresses• Weld joint details per Part 4, ¶ 4.2 if the

component is being designed per Part 4• If the shell or head is designed per Part 4 rules,

then nozzle reinforcement must also be per Part 4 rules

• Fabrication tolerances of VIII-2 shall be

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satisfied• Common Rules – next step is to selectively

publish “common rules” in only one place, which will be VIII-2.

Torispherical (F&D)Head,SA-516 Grade 70 VIII-2 Versus VIII-1

Diameter Pressure L/D, (tVIII-2 – tVIII-1) / Comments(Internal)

/ ,r/D

( VIII 2 VIII 1) /tVIII-1 %

48” 350 psi ~1, 0.06

+4.36% VIII-2 Head is thicker

48” 350 psi 0.8, 0.1

25.69% 80/10Head

60” 500 i 0 9 +13 10 VIII 2 H d

Div 2thicker

Div 2thinner

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60” 500 psi 0.9, 0.06

+13.10 VIII-2 Head is thicker

60” 500 psi 0.8, 0.1

30.08 80/10Head

Div 2thicker

Div 2thinner


May 22, 2012

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Semi Ellipsoidal (2:1) Head,SA-516 Grade 70 VIII-2 Versus VIII-1

Diameter Pressure(Internal)

(tVIII-2 – tVIII-1) / tVIII-1 %

60” 500 psi 9.94%

96” 500 psi 9.67%

Div 2thinner

Div 2thinner

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Opening Reinforcement RulesVIII-1

• P = 350 psi • OD = 48”, t = ½”OD 48 , t ½• Nozzle N1 18” OD, t n=1.062”

• N1 doesn’t meet UG-37.

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• A required = 7.1263 in2

• A available = 3.0548 in2


May 22, 2012

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Opening RulesVIII-2

• P = 350 psi • OD = 48” t = ½”• OD = 48 , t = ½• Nozzles N1 & N2 18” OD, t n= 1.062”

• Fully compensated as is. Moreover, N1 and

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N2 centerlines can be as close as 25.375” which is roughly 20% less than VIII-1 rules

External Pressure Rules, Cylindrical ShellVIII-2 Versus VIII-1

Diameter Length Pressure (tVIII-2 – tVIII-1) / gExternal

( VIII 2 VIII 1) /tVIII-1 %

96” 96 P = 15 psi -8.27%

96” 150 P = 15 psi -8.01%

Diameter D/t L/D (PVIII-2 – PVIII-1) / PVIII-1 %

Div 2Thinner shell

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96” 290 1 25.6%

10.75” 35 4.65 59.3%

Div 2Higher Allowable External Pressure


May 22, 2012

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Significant Revisions in 2011 AddendaSection VIII-2

• 4 5 – nozzle reinforcement• 4.5 nozzle reinforcement– updated in WRC Bulletin 529– clarify the rules for set-in versus set-on nozzles– calculation of the area A2 for variable thickness nozzles– Consistency for all nozzle geometries– Correction for radial nozzles in conical shells– modifications to the limits of reinforcement for radial

nozzles in spheres/formed heads

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nozzles in spheres/formed heads– consolidation of design rules for hillside and

perpendicular nozzles in formed heads– addition of a pressure thrust load check on weld

strength

Significant Revisions in 2011 AddendaSections VIII-1 & VIII-2

COMMON RULES

• UCS-67 and 3.11 – toughness rules– completely rewritten for production testing– Some technical changes– Paragraphs deleted and reformatted for better clarity

• Tables UHA-44 & 6.2 – PFHT– 304L allowable stresses to 1200F published in the A04– Revision adds the requirement for a post-cold-forming

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q p gsolution anneal for 304L

• UW-3 and 4.2.2 – weld joint Categories– Clarified that not all weld joints are assigned to a Category– For example, jacket closure-to-shell and bellows expansion

joint fillet welds


May 22, 2012

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Significant Revisions in 2011 AddendaSections VIII-1 & VIII-2

• Combination Unit Marking and Data Reports– Added requirements to list in marking [UG-116(j)]:

• Name of chamber• Design conditions for non-Code common elements

– Added requirements to list on Data Report [UG-120(b)]:

• Design conditions for non-Code common elements– Applies to heat exchangers, jacketed vessels, etc.

• Distribution and vapor belts [ see next slide ]

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• Distribution and vapor belts [ see next slide ]– Shell is continuous across the belt– Designed per App 9 as a Type 1 jacket – Longitudinal stress in shell under the belt has to meet

Code limits

Further Information on Vapor or Distributor Belts

• Example of Distributor Belt where shell is continuousSingle chamber– Single chamber

• Interpretation published [ VIII-1-10-19 ]

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May 22, 2012

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Significant Revisions in 2011 AddendaSections VIII-1, VIII-2 & VIII-3

• TolerancesInsert the contents regarding tolerances in the Forewords– Insert the contents regarding tolerances in the Forewords

– New paragraphs: VIII-1 = U-5, VIII-2 =1.5, VIII-3 = KG-160– Foreword not part of the Code

• Updated referenced standards– VIII-1 = Table U-3, VIII-2 = Table 1.1, VIII-3 = Table KG-

141– If the Table references “Latest Edition” for the “Year”, this

would be the latest edition publicly available by the standard developing organization (e g ASME or ASTM) as of the

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developing organization (e.g., ASME or ASTM) as of the contract date (similar to setting the Edition/Addenda)

• Other editions may be accepted on a case-by-case basis subject to concurrence by the AI (and SCS and/or Home Office, if necessary)

RECENT CODE CASES

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May 22, 2012

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Case 2596-1 Cold-Stretching Stainless Steel Pressure Vessels

• Revisions to Case 2596 approved April 6 2011Revisions to Case 2596 approved April 6, 2011• Case 2596-1 published in Supplement 6 to B&PV

Code Cases• Provisions of case to be incorporated into VIII-1 in

2013 Edition• Revisions include:

i d di f h i i f l

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– improved wording for the maximum size of nozzles,– improved wording for maximum weld reinforcement, – prohibition of stamping on the material, – improved wording for the determination of the strain rate,

Section VIII, Division 1Case 2676

• Alternate Procedure for Calculating Allowable AxialAlternate Procedure for Calculating Allowable Axial Compressive Stress in Cylindrical Shells Constructed of 2.25Cr-1Mo Steel at Temperatures Greater Than 700°F and Less Than or Equal to 1000°F

• This case provides a method for analyzing a pressure vessel subject to axial compressive stress in the creep regime.

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creep regime.• Current Code external pressure charts only valid in

non-creep regime• This case is significant for petro-chem industry


May 22, 2012

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RECENT INTERPRETATIONS

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Interpretation: VIII-1-10-25

Subject: UCS-56(d)(2), Rate of Heating During PWHTDate Issued: June 3, 2010File: 06-1195

Question: In accordance with the provisions of UCS-56(d)(2), if there are components in the assembly, such as nozzle forgings, that are thicker than either the shell or head plate, does the thickness of such components need be considered in meeting the requirements for the maximum heating rate?

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Reply: No.

• UCS-56(d)(2) only makes reference to “the maximum metal thickness of the shell or head plate in inches”


May 22, 2012

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Subject: UG-101, Review Transfer of Proof Test Reports Between Manufacturers (2010 Edition)

Date Issued: September 14, 2010File: 10-1329

Question: When using UG-101 in Section VIII, Division 1, as the design criteria, would it be acceptable to use a proof test from a Sister Company that is a stamp holder, when both companies having the same Authorized Inspection Agency and if all the design criteria remain the same and the parts conform to UG-101(d)(1) or UG-101(d)(2)? It is given that all other parameters are met and the company reviews and

47

given that all other parameters are met and the company reviews and approves the proof test and provides for outside proof testing in the Quality Control Manual from a Sister Company.

Reply: No.


Subject: Appendix 10 10-13 (2007 Edition 2009Subject: Appendix 10, 10 13 (2007 Edition, 2009 Addenda)

Date Issued: November 23, 2010File: 09-1598Question: Is it required by the rules of ASME Section VIII, Division 1, Appendix 10-13 that finite element

l d t d t f th d i l i b

48

analyses conducted as part of the design analysis be retained for three years as design calculations?

Reply: Yes.


May 22, 2012

25


Subject: UW-50, Nondestructive Examination (2007Subject: UW 50, Nondestructive Examination (2007 Edition, 2009 Addenda)Date Issued: November 23, 2010File: 10-183

Question: Is it required that the examinations, when specified by UW-50 of Section VIII, Division 1, be

49

p y , ,performed prior to the pneumatic test?

Reply: Yes.


Subject: Part UW, Table UW-12, Joint Efficiency (2007 Edition, 2009 Addenda)Addenda)

Date Issued: December 2, 2010File: 09-1015

Question: Is it permitted by the rules of ASME Section VIII, Division 1, Table UW-12 for a Type 1 weld joint to be assigned a joint efficiency from Table UW-12 when visual examination of the interior surface of the weld is not performed?

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Reply: Yes, provided the requirements in UW-35 and UW-37(d) are met.-------------------------------------------------------------------------------------Note: The Code has never defined what technique(s) must be employed to satisfy UW-35 and UW-37(d); See other Interpretations


May 22, 2012

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Subject: UG-20(d) [Division 1 (2010 Edition)] and 4.1.5.2(d)(3) [Division 2 ( d )](2010 Edition)]Date Issued: March 9, 2011File: 10-1800Question: When heat transfer calculations demonstrate that the temperature of a flange and its bolting is less than the temperature of the adjacent vessel components, may the flange and bolting be considered as a zone in accordance with Section VIII, Division 1, UG-20(d), and Section VIII, Division 2, 4.1.5.2(d)(3), which would permit a lower design temperature to be used for the flange and bolting than that used for the adjacent components?

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Reply: Yes.

Note: This interpretation also appears as VIII-2-10-05.

Also see Footnote 37 to UG-116


Subject: UG-10 (2010 Edition), Recertified Material P-Numberj ( ),Date Issued: March 31, 2011File: 11-246

Question: May a material that was originally identified with a specification not permitted by Section VIII, Division 1, but was recertified by the vessel manufacturer to a permitted specification

52

in accordance with UG-10(a)(2), use the same P-Number designation of the permitted specification?

Reply: Yes.


May 22, 2012

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Subject: UW-13(f), Fig. UW 13.3(b); and Appendix 20 Hub Design (2010and Appendix 20, Hub Design (2010 Edition)Date Issued: April 29, 2011File: 11-335

Question: A hub is machined from a flat plate by machining a groove in the plate such that the end of the hub

53

pdoes not project beyond the face of the original plate as shown in Fig. UW-13.3(b). Do the requirements of Appendix 20 apply?

Reply: Yes.

ASME Mexico Workshop - Section VIII - R3 - Presenation

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