ASME BPVC 2023 Section VI

The common supply and return headers are exempt from
Section IV requirements.
3 When multiple individual unmarked pressure
vessels are combined and certified as a complete boiler
-a the assembled boiler shall have a single nameplate
and Manufacturers Data Report
-b the aggregate heating surface of all the pressure
vessels and the combined minimum relief valve capacity
shall be marked on the nameplate
-c the supply and return headers shall be
constructed in accordance with Section IV and recorded
on the Manufacturers Data Report
5.9.8.1 Individual Boilers
a The individual boilers shall comply with all the requirements
of Section IV, Part HG, Article 8, as applicable.
b Each individual boiler of a modular steam heating
boiler shall be equipped with
1 steam gauge
2 water gauge glass
3 operating limit control
4 lowwater cutoff
5 safety valve
6 bottom blowoff valve
7 drain valve
c Each individual boiler of a modular hot water
heating boiler shall be equipped with
1 pressure/altitude gauge
2 thermometer
3 operating temperature control
4 safety relief valve
5 drain valve
5.9.8.2 Assembled Modular Boilers
a The individual modules shall be manifolded
together without any intervening valves.
Figure 5.9.8-1
Modules Connected With Parallel Piping
Main pump
Figure 5.9.8-2
Modules Connected With PrimarySecondary Piping
Main pump Module
pumps
ASME BPVC.VI-2023
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