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2017 Interpretations

Print Date: 6/23/2018 3:18:45 AM

INTERPRETATION 17-08

Subject: Repair/Alteration Plans for ASME VIII, Division 2, Class 1 Pressure Vessels

Edition: 2017

Question: Does the NBIC require a Repair/Alteration Plan for an ASME Section VIII, Division 2, Class 1 vessel to be certified by an engineer when a Manufacturer's Design Report was not required to be certified under the original code of construction?

Reply: No.

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INTERPRETATION 17-07

Subject: Omission of PWHT by an R Certificate holder

Edition: 2017

Question 1: A Section VIII, Div. 1 vessel was originally PWHT for service related reasons only and stamped per the original code of construction. An R Certificate Holder omits PWHT. Is the omission of PWHT of the vessel without the use of alternative weld methods in Part 3, 2.5.3 considered an alteration?

Reply: Yes.

Question 2: A Section VIII, Div. 1 vessel was originally PWHT for service related reasons only and stamped per the original code of construction. An R Certificate Holder omits PWHT. Is the omission of PWHT of the vessel with the use of alternative weld methods in Part 3, 2.5.3 considered a repair?

Reply: Yes.

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INTERPRETATION 17-06

Subject: Part 3, Section 2.5.3.6, Welding Method 6

Edition: 2017

Question: When it is impracticable to perform post-weld heat treatment, may a tube-to-header attachment weld be made using Welding Method 6 in accordance with Part 3, Section 2, 2.5.3.6?

Reply: No. As explained in Part 3, Section 2, 2.5.3.6, use of Welding Method 6 is limited, among other things, to butt welds in tubing. The method has not been approved for use on tube-to-head welds.

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INTERPRETATION 17-05

Subject: Repairs to a Pressure Retaining Part

Edition: 2017

Question: Is it permitted to perform a repair in accordance with the NBIC of a part that has not yet been installed in a pressure vessel or boiler that has not been completed in accordance with the code of construction?

Reply: No. The NBIC rules for repairs dor not apply to items not yet completed in accordance with the code of construction.

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INTERPRETATION 17-04

Subject: Establishing maximum allowable operating conditions using API-510

Edition: 2017

Question: Does NBIC recognize API-510's procedure "Evaluation of Existing Equipment with Minimal Documentation" (Paragraph 7.7) for establishing maximum allowable operating conditions for equipment without nameplates, records, or stamping?

Reply: No.

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INTERPRETATION 17-03

Subject: Adding Handhole Ring on Pressure Side of Pressure Retaining Item

Edition: 2017

Question: If acceptable to the jurisdiction and considered appropriate by the inspector, may adding a handhole ring as described in Part 3, Section 3, Figure 3.3.4.3-b and meeting the requirements of Part 3, Section 3, 3.3.2(e)(5) be considered a routine repair?

Reply: No.

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INTERPRETATION 17-02

Subject: Continuity Records Retention

Edition: 2017

Question: In Table 1.5.1c), does the phrase “the continuity records are subject to review during each National Board triennial certificate review” mean that the continuity records developed since the last review are to be retained and made available for review during the next review?

Reply: Yes.

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INTERPRETATION 17-01

Subject: Application of Term "Practicable

Edition: 2017

Question: May the desire to save time and/or expense be used solely in determining if a repair and/or alteration activity is practicable?

Reply: No. The determination of “practicable” shall be based on technical consideration of the nature and scope of repair and/or alteration activities.

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