Reply (2): Yes, provided noncorrosive service has been specified by the user. Interpretation: VIII-1-95-47 Subject: Section VIII, Division 1 (1992 Edition, 1993 Addenda); UG-116(h) Date Issued: March 13, 1995 File: BC94-412 Question (1): For vessel parts for which Partial Data Reports are required in UG-120(c), may "RT-1" be added to the required stamping? Reply (1): No. "RT-1" marking only applies to complete vessels. Question (2): For vessel parts for which Partial Data Reports are required in UG-120(c), are additional markings "W" and "year built" prohibited? Reply (2): No, provided all the requirements of the additional marking are met. Interpretation: VIII-1-95-48 Subject: Section VIII, Division 1 (1992 Edition, 1993 Addenda); U-I(h) Date Issued: March 13, 1995 File: BC94-670 Question: Steam is generated in a processing system containing a number of pressure vessels used in the manufacture of chemical and petroleum products. When the steam generated does not provide all the steam needed for the operation of the chemical or petroleum process plant, fired auxiliary steam generation equipment, which is an integral part of the plant, is necessary for the operation of the plant. May fired auxiliary steam generation equipment that generates steam for the operation of a chemical or petroleum processing system be constructed to the rules of Section VIII, Division 1, satisfying the requirements of U-1(h)? Reply: Yes, see footnote 1 of U-1. Interpretation: VIII-1-95-49 Subject: Section VIII, Division 1 (1992 Edition, 1993 Addenda); Foreword Date Issued: March 13, 1995 File: BC94-672 Question: Does the term "construction" as used in the Foreword of Section VIII, Division 1 include material? Reply: Yes. Interpretation: VIII-1-95-50 Subject: Section VIII, Division 1 (1992 Edition, 1993 Addenda); UCS-79(d) Date Issued: March 13, 1995 File: BC94-684

Question (1): A cold formed head has to be heat treated to fulfill the requirements of UCS-79(d) in Section VIII, Division 1. Does the term "heat treated subsequently" mean just after forming and prior to any other operation? Reply (1): No. Question (2): If Reply (1) is no, then will PWHT in accordance with UCS-56 satisfy the requirements of UCS-79(d) following welding of the head to the vessel? Reply (2): Yes. Interpretation: VIII-1-95-51 Subject: Section VIII, Division 1 (1992 Edition, 1993 Addenda); UW-35(b) and Appendix 6, 6-3

and 6-4 Date Issued: March 13, 1995 File: BC95-046 Question (1): Is a reduction in thickness due a welding process, e.g., an "outside undercut" that meets the requirements of UW-35(b)(1) and (2), acceptable under Section VIII, Division 1? Reply (1): Yes. Question (2): Would such an indication be classified as a relevant indication when magnetic particle examination is required and performed by Appendix 6? Reply (2): No, this indication would not be considered a relevant indication, until it exceeded the acceptable requirements of UW-35(b)(1) or (2). Interpretation: VIII-1-95-52 Subject: Section VIII, Division 1 (1992 Edition, 1993 Addenda); U-1(e)(1) Date Issued: March 13, 1995 File: BC95-047 Question: An aluminum weld neck flange is welded to a nozzle neck of an aluminum vessel, constructed to the rules of Section VIII, Division 1. May the Manufacturer exclude the weld neck flange and joining weld from the scope of Division 1, i.e., U-1(e)(1), if they are properly described on the vessel drawing and the Manufacturer’s Data Report Form? Reply: Yes. Interpretation: VIII-1-95-53 Subject: Section VIII, Divisions 1 and 2 (1992 Edition, 1993 Addenda); UW-9(d) and AF-605 Date Issued: March 13, 1995 File: BC95-049 Question (1): Are there any requirements for heat treatment after forming in Section VIII, Division 2 similar to those of AF-605, for pressure vessels constructed of carbon and low alloy steel? Reply (1): No.