Print This Page


2015 Interpretations

Print Date: 2/17/2018 7:31:38 PM

INTERPRETATION 15-15

Subject: Installation Pressure Test

Edition: 2015

Question: If a pressure test has been performed and documented on the applicable Manufacturer’s Data Report for a boiler, pressure vessel or piping and the Jurisdiction does not require additional pressure tests, is an additional pressure test required prior to initial operation?

Reply: No.

Back to Index


INTERPRETATION 15-14

NOTE: This is actually an interpretation of the 2017 edition of the NBIC, not the 2015 edition. The information for this interpretation can now be found under Interpretation 17-02.

Back to Index


INTERPRETATION 15-13

Subject: Routine Repair Stamping Requirements

Edition: 2015

Question 1: Are nameplates and stamping required for routine repairs?

Reply 1: No, subject to acceptance of Jurisdiction and the concurrence of the inspector.

Question 2: Are nameplates or stamping required for repairs other than of a routine nature?

Reply 2: Yes.

Back to Index


INTERPRETATION 15-12

Subject: Surface Repair of Corrugating Rolls

Edition: 2015

Question: Is an “R” stamp required to be applied to a corrugating roll after a surface repair by welding, such as restoration of broken flutes, steam cut trunnion flanges, or a worn surface of a trunnion journal?

Reply: Yes, unless the repair meets the conditions for a routine repair in Part 3, paragraph 3.3.2.

Back to Index


INTERPRETATION 15-11

NOTE: This is actually an interpretation of the 2013 edition of the NBIC, not the 2015 edition. The information for this interpretation can now be found under Interpretation 13-11.

Back to Index


INTERPRETATION 15-10

NOTE: This is actually an interpretation of the 2017 edition of the NBIC, not the 2015 edition. The information for this interpretation can now be found under Interpretation 17-01.

Back to Index


INTERPRETATION 15-09

NOTE: This is actually an interpretation of the 2013 edition of the NBIC, not the 2015 edition. The information for this interpretation can now be found under Interpretation 13-10.

Back to Index


 
INTERPRETATION 15-08

Subject: Part 3, 5.7

Edition: 2015

Question: If an alteration is performed only on one pressure chamber (e.g. shell side or tube side) of a heat exchanger, is it permitted to only stamp the MAWP for the altered side on the alteration nameplate?

Reply: No, the MAWP of both chambers shall be listed on the nameplate.

Rationale: NBIC Part 3, Sections 5.7.3, 5.7.5, Fig. 5.7.5-b; The alteration nameplate represents the current stamped ratings of the altered vessel.  Having to decipher the current stamped ratings of the altered vessel from the alteration nameplate(s) and the original manufactured nameplate leads to confusion.

Back to Index


 

INTERPRETATION 15-07

Subject: Part 3, 3.4.3

Edition: 2015

Question: Is an increase in external loading on a bracket that increases local stress in a pressure retaining item (PRI) which does not require redesign of the PRI or bracket attachment considered an alteration?

Reply: No

Back to Index


 

INTERPRETATION 15-06

Subject: Part 3, 3.4.3

Edition: 2015

Question: When the total heat input into a boiler (for example a Heat Recovery Steam Generator (HRSG)) is changed (e.g. increased firing rate, adjustment, or modification to the primary or an auxiliary heat source), resulting in the steaming capacity exceeding the original Manufacturer’s Minimum Required Relieving Capacity (MRRC), does this departure from the original Manufacturer’s design represent an alteration? 

Reply: Yes

Back to Index


 

INTERPRETATION 15-05

Subject: Part 3, 1.3.2 c)

Edition: 2015

Question: Is owner's method of verification of the installation of the Repair Nameplate acceptable per NBIC Part 3, 1.3.2 c) considering it as repair not routine repair as PWHT is involved in the repair?

Reply: Yes (with the authorization and knowledge of the Inspector)

Back to Index


 

INTERPRETATION 15-04

Subject: Part 3, Section 3

Edition: 2015

Question: Is explosion welding of plugs into leaking heat exchanger tubes considered a repair per the NBIC Part 3?

Reply: Yes.

Back to Index


 

INTERPRETATION 15-03

Subject: Part 3, 3.2.6

Edition: 2015

Question: Are fillet welded patches permitted by the NBIC for repairs or alterations to pressure retaining items?

Reply: Fillet welded patches are not addressed by the NBIC.

Back to Index


 

INTERPRETATION 15-02

Subject: Part 3, 5.12.2

Edition: 2015

Question: When a pressure relief valve is repaired, are field labels for type/model number, capacity, CDTP, and/or BP required on the repair nameplate if the values are not changed from the original manufacturer’s nameplate or stamping?

Reply: No.

Back to Index


 

INTERPRETATION 15-01

Subject: Part 1, 3.3.4

Edition: 2015

Question: Is it permissible to install boilers less than the minimum 36” clearance if recommended by the manufacturer and approved by the Jurisdiction?

Reply: Yes, in accordance with Part 1, Section 3.3.4 a).

Back to Index