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发表于 2016-5-16 15:57:56
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Interpretation: VIII-78-27
Subject: Section VIII, Division 1,UCS-56(d)(4)
Date Issued: February 7, 1978
File: BC77-860
Question: Under UCS-56(d)(4) it is indicated that,with the exception of Fig. UW-16.1, sketches (a) and (b), the criteria for establishingthe thickness to be used in applying the requirements for postweld heattreatment is the thickness of the shell or head plate in nozzle attachmentwelds. May the ordered thickness be usedfor establishing this criteria?
Reply: Yes. See also UG-16(c).
Interpretation: VIII-80-70
Subject: SectionVIII, Division 1, UG-16(c) and UG-32(a), Tolerance on Plate Thickness
Date Issued: August 8, 1980
File: BC79-322
Question: Assumethat in accordance with footnote 12 of UG-32 Section VIII, Division 1, a platewhich is to be formed into a head is ordered with a forming allowance consideredappropriate for the application but without an additional allowance for millunder tolerances on the plate. Afterforming, the head is found to have a minimum thickness less than required byUG-32. May the undertolerance permitted by UG-16(c) be applied to the minimumthickness calculations, and if the actual minimum thickness is within thislimit, may the head be used at the design pressure corresponding to thecalculated minimum thickness?
Reply: Yes.
Interpretation: VIII-80-76
Subject: SectionVIII, Division 1, UG-16(b) and (c), Sheet Tolerance
Date Issued: August 15, 1980
File: BC80-194
Question: Isit the intent of UG-16(b) to establish a minimum thickness of 1/16 in. withoutallowance for undertolerance?
Reply: No.The undertolerances of UG-16(c) may be applied to the minimum thickness ofUG-16(b). We caution you to observe thewarning in the last sentence of UG-16(c) which points out that some materialspecifications permit greater undertolerances than permitted in UG-16(c).
Interpretation: VIII-1-86-67
Subject: SectionVIII, Division 1; UG--16(c)
Date Issued: May 13, 1986
File: BC86-240
Question: Astainless steel pressure vessel is being fabricated with no corrosion allowancespecified. The plate material ordered isequal to the design thickness. Can the plate material be accepted and used inthe vessel with the mill undertolerance values given in UG-16(c) if thethickness is less than required by the calculations of UG-27?
Reply: Yes.
Interpretation: VIII-1-92-216
Subject: SectionVIII, Division 1 (1992 Edition, 1992 Addenda); UG-16(b)(4) and (c)
Date Issued: May24, 1994
File: BC93-718
Question: Anair tank is constructed to the minimum required thickness of 3/32, in. as givenin UG-16(b)(4) of Section VIII, Division 1; may a formed head with a 6% undertolerance,as described in UG-16(c), be used in the construction?
Reply: Yes.
Interpretation: VIII-1-04-92
Subject: Section VIII,Division 1 (2004 Edition, 2005 Addenda); UG-16(c)
Date Issued: April 27, 2006
File: BC06-357
Question: A pressure vesselthat has no specified corrosion allowance is made of plate that is ordered to athickness equal to the required design thickness. If the actual plate thicknessreceived is less than the required design thickness, but is within theallowable under-tolerance as given in UG-16(c); may the plate be used inaccordance with the rules of Section VIII Division 1?
Reply: Yes.
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