Bpvc Viii 1interp Stnd 62 2013 Jan

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SECTION VIII-1

Subject Interpretation File No.

Appendix 17, 17-1(a)(2) and 17-7(a), Performance QualificationRequirements for Welders per Appendix 17 ............................................ VIII-1-10-49 05-661

Part UNF, UG-24(a), and Appendix 7, Aluminum Castings (2010 Edition,2011 Addenda) ......................................................................................... VIII-1-10-51 11-1856

UG-37 and UG-40(b), Limit of Reinforcement (2010 Edition,2011 Addenda) ......................................................................................... VIII-1-10-52 11-1866

UG-99(e), Maximum Allowable External Pressure (2010 Edition,2011 Addenda) ......................................................................................... VIII-1-10-47 11-1606

UG-130, Certification Mark (2010 Edition, 2011 Addenda) ........................ VIII-1-10-48 11-1699

UW-16(f)(3)(a)(5), UG-36(c)(3)(d), and Fig. UW-16.2, Fitting Diameter(2010 Edition, 2011 Addenda) ................................................................. VIII-1-10-53 12-345

UW-51(b)(3), Aligned Indications (2010 Edition, 2011 Addenda) .............. VIII-1-10-50 10-1710



Interpretation: VIII-1-10-47

Subject: UG-99(e), Maximum Allowable External Pressure (2010 Edition, 2011 Addenda)

Date Issued: J anuary 27, 2012

File No.: 11-1606

Question: In accordance with the provisions of UG-99(e)(1), when pressure chambers of combination units have

been designed to operate independently and be hydrostatically tested as separate vessels (each chamber tested

without pressure in the adjacent chamber), is it permitted by the rules of ASME Section VIII, Division 1 that the

hydrostatic test pressure in one chamber acting as external pressure on the common element may exceed the

maximum allowable external pressure of such common element?

Reply: Y es.


Subject: UG-130, Certification Mark (2010 Edition, 2011 Addenda)


File No.: 11-1699

Question: Is it required by the rules of ASME Section VIII, Division 1, UG-130, that the Certificate of

Conformance Form UV-1 or UD-1 is to be delivered to the customer who purchases the pressure relief device from

the Manufacturer or the Assembler?

Reply: No.


Subject: Appendix 17, 17-1(a)(2) and 17-7(a), Performance Qualification Requirements for Welders per Appendix

17


File No.: 05-661

Question: Do performance qualifications meeting the requirements of Section IX, QW-197.2 qualify a welding

operator to use Laser Beam Welding (LBW) to deposit lap joints using a WPS qualified under the provisions of

Section VIII, Division 1, Appendix 17, 17-7(a)(1)(b) for welded assemblies constructed under the provisions of

17-1(a)(2)?

Reply: No.




Subject: UW-51(b)(3), Aligned Indications (2010 Edition, 2011 Addenda)

Date Issued: June 27, 2012

File No.: 10-1710

Question (1): A group of aligned indications in a radiograph have an aggregate length less thantwithin a weld

length of 12t. Are these indications acceptable, regardless of the spacing between them?

Reply (1): Yes.

Question (2): A group of aligned indications in a radiograph have an aggregate length greater thantwithin a

running weld length of 12t, and the spacing between any two of these indications exceeds 6L, whereL is the length

of the longest indication within the group of indications under consideration. Are these indications considered

acceptable?

Reply (2): Yes.


Subject: Part UNF, UG-24(a), and Appendix 7, Aluminum Castings (2010 Edition, 2011 Addenda)


File No.: 11-1856

Question: Is Appendix 7 applicable to aluminum castings?

Reply: No; see UG-24(a)(1) through (4).


Subject: UG-37 and UG-40(b), Limit of Reinforcement (2010 Edition, 2011 Addenda)


File No.: 11-1866

Question: A shell nozzle is located near a cone–cylinder junction such that the limits of reinforcement, as defined

in UG-40(b), extend into the adjacent cone. Is it allowed to consider the excess thickness of the cone, excluding the

thickness required for reinforcement of the cone–cylinder junction, within the limits of reinforcement as availablearea in the nozzle reinforcement calculations required by UG-37?

Reply: Y es.




Subject: UW-16(f)(3)(a)(5), UG-36(c)(3)(d), and Fig. UW-16.2, Fitting Diameter (2010 Edition, 2011 Addenda)


File No.: 12-345

Question: When meeting the requirements of UW-16(f)(3)(a)(5), the spacing requirements of UG-36(c)(3)(d)

need to be met. Under UG-36(c)(3)(d), the diameter of the adjacent openings,d1 andd2, are defined as the finished

diameter. Where the standard fittings are inserted through the vessel wall and attached per Fig. UW-16.2, sketch

(K), is the diameterd1 andd2 considered to be the inside diameter of the fittings (i.e., coupling)?

Reply: Y es.

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Bpvc Viii 1interp Stnd 62 2013 Jan