1、ASME AG-1 INTERPRETATIONSI-1ASME AG-1INTERPRETATIONSReplies to Technical InquiriesJune 2012 Through December 2013FOREWORDThis publication includes all of the written replies issued between the indicated dates by the Secretary,speaking for the ASME Committee on Nuclear Air and Gas Treatment Equipment
2、, to inquiries concerninginterpretations of technical aspects of ASME AG-1, Code on Nuclear Air and Gas Treatment.These interpretations were prepared in accordance with the accredited ASME procedures. ASME proce-dures provide for reconsideration of these interpretations when or if additional informa
3、tion is available thatthe inquirer believes might affect the interpretation. Further, persons aggrieved by this interpretation mayappeal to the cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,” “rate,”or “endorse” any item, construction, proprietary device, or activity.An
4、 interpretation applies to the edition or addenda stated in the interpretation itself, or, if none is stated,to the latest published edition at the time it is issued. Subsequent revisions to the rules may have supersededthe reply.For detailed instructions on the preparation of technical inquiries, r
5、efer to the Preparation of TechnicalInquiries to the Committee on Nuclear Air and Gas Treatment in Mandatory Appendix I of AG-12015.I-2INTENTIONALLY LEFT BLANKASME AG-1 INTERPRETATIONSI-3Interpretation: 15-1Subject: AWS D1.6 Reference (ASME AG-12009 Edition Through the 2011 Addenda, and allearlier E
6、ditions and Addenda, Section AA, AA-6310, Welding RequirementsParagraph)Date Issued: June 28, 2012File: 11-460Question: Should AA-6310(k)(1) qualifications reference AWS D1.6, Structural Welding Code Stainless Steel?Reply: Yes.Interpretation: 15-2Subject: Ribbon Spacers in a Radial Flow Filter ASME
7、AG-12003 Edition through the 2011Addenda, FK-4130(d) and FK-5130Date Issued: June 28, 2012File: 12-198Question: Does movement of the ribbon spacers intended to serve as spacers to prevent contact betweenthe edge of pleats and the protective screening in a radial flow filter constitute failure of the
8、 qualificationprocess?Reply: Yes.Interpretation: 15-3Subject: Fluid Momentum Loads (FML) in Ductwork and Housings Design (ASME AG-12009Edition Through the 2011 Addenda, and all earlier Editions and Addenda, ArticlesAA-4000, SA-4000, and HA-4000)Date Issued: July 12, 2012File: 10-2105Question: Can CO
9、NAGT clarify the input requirements and analytical methods to quantify fluidmomentum loads (FML) in ductwork and housings design?Reply: The intent was clarified by changes made in the ASME AG-12012 Edition.ASME AG-1 INTERPRETATIONSI-4Interpretation: 15-4Subject: Safety-Related Fans (ASME AG-12003 Ed
10、ition)Date Issued: March 15, 2013File: 13-110Question (1): As per BA-4160, safety-related fans in nuclear power plants shall meet the vibrationlimits for both shop test and field test conditions or for shop test only?Reply (1): Safety-related fans in nuclear power plants shall meet the vibration lim
11、its during shop testsand after installation in accordance with BA-4160.Question (2): As per BA-4160, safety-related fans installed in AHU (air-handling unit) housing, ACU(air-cleaning unit) housing, or cubicle cooler (CC) housing shall meet the vibration limits?Reply (2): Yes. Safety-related fans in
12、stalled in AHU, ACU, or CC housings shall meet the vibrationlimits listed in BA-4160.Interpretation: 15-5Subject: Resistance to Pressure (ASME AG-1b2011 Addenda)Date Issued: August 8, 2013File: 13-1316Question: Shall the rate of airborne water droplets flowing toward the face of the filter under tes
13、t beallowed to fluctuate throughout the duration of the test?Reply: Yes.Interpretation: 15-6Subject: Thermal Loads (ASME AG-12012 Edition, and all earlier Editions and Addenda,Article AA-4000)Date Issued: August 15, 2013File: 11-2159Question (1): Article AA-4000 describes “constraint of free end dis
14、placement loads” as T, but internalthermal loading is not identified. Similarly, Article HA-4000 does not identify internal thermal gradientsas a loading condition. Are internal thermal gradients required to be evaluated for service loads A and Busing the increased allowable permitted for secondary
15、stress?Reply (1): Yes. Table AA-4212 states that thermal loads shall be considered for service loads A andB. Table AA-4321 states that a stress increase is permitted for thermal gradient stresses across the thicknessof the material only. Linear thermal stress (i.e., axial expansion or free end displ
16、acement) is not allowedan increase.Question (2): If the operating temperature is less than 150 F, normal engineering practice is to ignorethermal. If thermal gradient is less than 80 F, does ASME AG-1 require thermal gradients to be evaluatedabove this threshold?Reply (2): Yes.ASME AG-1 INTERPRETATI
17、ONSI-5Interpretation: 15-7Subject: Faceguards (ASME AG-12012 Edition, and all earlier Editions and Addenda)Date Issued: December 3, 2013File: 13-1231Question: Is it acceptable to utilize an expanded diamond-shaped faceguard instead of the 4 4 meshas specified in FC-3140?Reply: Yes. The utilization o
18、f an expanded diamond-shaped faceguard instead of the 4 4 meshfaceguard is compliant based on FC-3210, Alternate Materials, as long as(a) the pattern of the expanded diamond-shaped faceguard provides the intended protection to themedia pack from incidental contact.(b) the strand thickness and width
19、meets the minimum requirements specified in FC-3140.(c) it has been qualified in a filter design, in accordance with Article FC-5000, as required by FC-3210.(d) the faceguard edges shall also be installed such that there are no wires or edges that create a mediapuncture hazard or project from the pe
20、rimeter of the filter. Edges formed when slitting or shearing faceguardsshall be smoothed on both surfaces of the material before installation, or otherwise covered.I-6INTENTIONALLY LEFT BLANKASME AG-1 INTERPRETATIONSI-1ASME AG-1INTERPRETATIONSReplies to Technical InquiriesNovember 2006 Through Marc
21、h 2010FOREWORDThis publication includes all of the written replies issued between the indicated dates by the Secretary,speaking for the ASME Committee on Nuclear Air and Gas Treatment Equipment, to inquiries concerninginterpretations of technical aspects of ASME AG-12009, Code on Nuclear Air and Gas
22、 Treatment.These interpretations were prepared in accordance with the accredited ASME procedures. ASME proce-dures provide for reconsideration of these interpretations when or if additional information is availablewhich the inquirer believes might affect the interpretation. Further, persons aggrieve
23、d by this interpretationmay appeal to the cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,”“rate,” or “endorse” any item, construction, proprietary device, or activity.An interpretation applies to the edition or addenda stated in the interpretation itself, or, if none is
24、stated,to the latest published edition and addenda at the time it is issued. Subsequent revisions to the rules mayhave superseded the reply.For detailed instructions on the preparation of technical inquiries, refer to the Preparation of TechnicalInquiries to the Committee on Nuclear Air and Gas Trea
25、tment in Mandatory Appendix I of AG-12009.I-2INTENTIONALLY LEFT BLANKASME AG-1 INTERPRETATIONSI-5Interpretation: 09-6Subject: Section PC and HEPA Filter Testing (ASME AG-12003 Edition Through the 2007Addenda)Date Issued: July 15, 2009File: 09-838Question: Does the AG-1 Code require a separate qualif
26、ication test on a HEPA (Section FC) if thequalified filter had the gasket located on the upstream face of the filter and that very same filter now hasthe gasket located on the downstream face?Reply: No.Interpretation: 09-7Subject: SA-4220 and Tables SA-4212 and SA-4216, Allowable Stress Criteria (AS
27、ME AG-12003 Edition With the 2007 Addenda)Date Issued: July 23, 2009File: 08-1234Question (1): In the allowable stress criteria given in SA-4220, the allowable for Levels A and C formembraneandbendingdesignappearinconsistentwiththereferencedTableAA-4321andstandardallowablemagnitudes for these two le
28、vels. Table AA-4321 states the Level A allowable as 1.5S and the Level Callowable as 1.8S. Paragraph SA-4220 states comparable allowable as 1.8 0.6Fyfor Level A and 0.9Fyfor Level C. These appear to be reversed, such that the Level A allowable would be 0.9Fyand the LevelC allowable would be 1.8 0.6F
29、y. Is this a typo between the A and C?Question (2): Tables SA-4212 and SA-4216 both show Level B load combinations as “Not required.”Why are they not required? These two tables also both show Level D load combinations as “Not requiredunless DPD is applicable.” Again, why would combinations for this
30、level be considered as not requiredunless there is a design pressure differential, and if DPD is applicable, what combination would be utilized?Discussion: The first question is based on review of the allowable stress criteria, and my confusionwith a Level A allowable stress being higher than a Leve
31、l C allowable stress.The second question is from the NRC based on a Design Certification submittal from AREVA forthe U.S. Evolutionary Power Reactor (EPR). The question is a formal Request for Additional Information(RAI) based on the NRC review of our criteria which has shown the same load combinati
32、on tables in oursubmittal.Reply: Yes. The load combinations and stress criteria in AA-4300 should be utilized.The CONAGT Committee recognizes this apparent inconsistency. A Code revision is in process todelete the load combinations and allowable stress criteria from. Section SA.ASME AG-1 INTERPRETAT
33、IONSI-6Interpretation: 09-8Subject: SA-4232.1 and SA-4232.2, Ductwork Deflection Criteria for Welded Ductwork(ASME AG-12003 Edition Through the 2007 Addenda)Date Issued: July 23, 2009File: 09-101Question: Are there alternative ductwork deflection criteria for welded ductwork other than thatprovided
34、in SA-4232.l and SA-4232.2?Discussion: Paragraph SA-4332 appears to provide ductwork deflection criteria for ductwork withmechanical joints. Welded duct joints provide a joint that is more tolerant to larger duct deflections, providedstress limits are not exceeded. For welded ductwork, satisfaction
35、of stress limits in AA-4230 should besufficient.Reply: Yes. If the stress criteria in AA-4230 are satisfied, the deflection criteria in SA-4332 are notnecessary.The CONAGT Committee recognizes this apparent inconsistency. A Code revision is in process toaddress the deflection criteria issue.Interpre
36、tation: 09-9Subject: Appendix AA-D-3340, Equations (36) and (37) (ASME AG-12003 Edition Throughthe 2007 Addenda)Date Issued: August 10, 2009File: 05-991Question: Are eqs. (36) and (37) in Appendix AA-D-3340 correct?Reply: No. The equations identified in the Inquiry contain errors. A Code revision is
37、 being processedto correct this situation.Interpretation: 09-10Subject: HEPA Filter Qualification Testing (ASME AG-l2009 Edition)Date Issued: March 10, 2010File: 10-55Question: Will the qualification of a 1500 cfm HEPA filter with vinyl coated aluminum separatorsper FC-3160(b) also qualify a 1500 cf
38、m HEPA filter with the same design and construction and materials,except that the separators are of bare aluminum per FC-3160(a) and the filter is to be used in noncorrosiveatmospheres?Reply: Yes.ASME AG-1 INTERPRETATIONSI-1ASME AG-12009INTERPRETATIONSReplies to Technical InquiriesNovember 2006 Thro
39、ugh November 2008FOREWORDThis publication includes all of the written replies issued between the indicated dates by the Secretary,speaking for the ASME Committee on Nuclear Air and Gas Treatment Equipment, to inquiries concerninginterpretations of technical aspects of ASME AG-12009, Code on Nuclear
40、Air and Gas Treatment.These interpretations were prepared in accordance with the accredited ASME procedures. ASME proce-dures provide for reconsideration of these interpretations when or if additional information is availablewhich the inquirer believes might affect the interpretation. Further, perso
41、ns aggrieved by this interpretationmay appeal to the cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,”“rate,” or “endorse” any item, construction, proprietary device, or activity.An interpretation applies to the edition or addenda stated in the interpretation itself, or,
42、if none is stated,to the latest published edition and addenda at the time it is issued. Subsequent revisions to the rules mayhave superseded the reply.For detailed instructions on the preparation of technical inquiries, refer to the Preparation of TechnicalInquiries to the Committee on Nuclear Air a
43、nd Gas Treatment in Mandatory Appendix I of AG-12009.INTENTIONALLY LEFT BLANKASME AG-1 INTERPRETATIONSI-3Interpretation: 09-1Subject: Carbon Steel Service Level 1 Ductwork (ASME AG-12003 Edition With the 2004Addenda)Date Issued: July 31, 2007File: 07-984Question: Is it allowable to use carbon steel
44、service level 1 ductwork with the ductwork interior beinguncoated?Reply: No.Interpretation: 09-2Subject: AG-1, Division II, Paragraph FF-1130; Maximum Size for a Batch (ASME AG-12003 Edition, Section FF)Date Issued: November 27, 2007File: 07-1739Question (1): If the requirements of AG-1, Division II
45、, para. FF-1130 are satisfied, but a charcoalmixing facility has a limit of 2 m3at one time, is the maximum size for a batch 2 m3or 10 m3?Reply (1): The maximum batch size is 10 m3. If the mixing facility limit is 2 m3then the batch sizeis the resulting 2 m3.Question (2): Why is there a maximum of 1
46、0 m3for one batch of charcoal adsorbent?Reply (2): The batch limit appears in U.S. NRC Regulatory Guide 1.52.Interpretation: 09-3Subject: HEPA Filter Faceguards (ASME AG-1, 2003 Edition, Through the 2007 Addenda)Date Issued: June 19, 2008File: 08-458Question: Is a HEPA filter design that includes a
47、faceguard seated underneath a face gasket consideredas acceptable in accordance with Section FC of ASME AG-1?Reply: No.Interpretation: 09-4Subject: Section BA, Articles 3400, 3410, and 3420 (ASME AG-1, 2003 Edition, Through the2007 Addenda)Date Issued: August 19, 2008File: 08-1096Question: In ASME A
48、G-1 Section BA, Articles 3400, 3410, and 3420, should the term “ManufacturersCertificate of Compliance” be “Manufacturers Certificate of Conformance”?Reply: Yes. Section BA, Article 3400, 3410, and 3420 will be revised in the 2009 Edition of AG-1.ASME AG-1 INTERPRETATIONSI-4Interpretation: 09-5Subje
49、ct: Pulse Mode Testing (ASME AG-12003 Edition up to and Including the 2007Addenda)Date Issued: October 14, 2008File: 07-10Question (1): When performing pulse mode testing with continuous monitoring detectors, does eachseparate injection have to be within H1100620% of the average upstream concentration reading?Reply (1): No.Question (2): Is pulse testing acceptable for all versions of N510 adsorber testing sections?Reply (2): Yes.I-1ASME AG-1b2007INTERPRETATIONSReplies to Technical InquiriesNovember 1996 through November 2006FOREWORDThis publication includes
