Flow Chart
Print Date: 7/3/2025 7:18:22 AM
Does the Customer or Jurisdiction require work to be processed as an alteration?
Work being performed may be considered a repair subject to the rules of NBIC Part 3, 3.3 (Repairs) and 3.4 (Alterations) with concurrence from the jurisdictional authority.
3.4.4. a) Does work result in an increase in the MAWP (internal or external) or temperature of a pressure-retaining item (PRI) regardless of whether or not a physical change was made to the PRI?
3.4.4. b) Does work result in an increase in minimum temperature?
3.4.4. c) Have new nozzles or openings been added in the boiler or pressure vessel, and are they of the size and connection type that require reinforcement and strength calculations by the original code of construction?
3.3.3. j) Is the new nozzle different than one in the original design or located in a different part of the vessel or closer than three times its diameter from another nozzle?
3.4.4. j) For plate heat exchangers, in addition to the applicable examples of alterations above, do any of the changes result in a change from what is listed on the MDR or described on the Original Equipment Manufacturer's (OEM) drawing?
- For heat transfer plates:
- A change in material grade or nominal thickness;
- A reduction in number beyond any minimum, or when no minimum is specified;
- An increase in number beyond any maximum, or when no maximum is specified;
- A change in model type.
- Any change in material whether described in 3.3.3 s) or as described in 3.4.4 g):
- A change in connection bolt or frame compression bolt diameter or material grade;
- A change in material grade or nominal dimensions of any end plates or nozzles.