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Discharge Piping from Non-integral Separately Fired Superheater

Discharge Piping from Non-integral Separately Fired Superheater

(OP)
I am reviewing some design blueprints for a plant expansion that has not yet been commissioned. Part of the design includes a non-integral superheater fed from a branch steam line. The piping to the superheater is marked non-boiler code, but the piping out of the superheater is marked boiler code until the first valve. I was under the impression that piping to and from a non-integral superheater was all non-boiler code. Why would the superheater outlet piping be considered boiler code? The engineering firm that did the design is no longer in business or I would ask them. Thanks in advance.

RE: Discharge Piping from Non-integral Separately Fired Superheater

Is it non-boiler code or non-power-piping code? Is your problem described in Figure 100.1.2 of B31.1? Refer to 122.1.2 of B31.1 which specifies design of superheater outlet header up to first stop valve

Not sure if this helps, good luck

Jeff
Pipe Stress Analysis Engineer
www.xceed-eng.com

RE: Discharge Piping from Non-integral Separately Fired Superheater

(OP)
Thanks Jeff. Sorry I wasn't clear; I was referring to boiler code. I believe my situation is shown on 100.1.2(B3) which shows a non-integral superheater. This drawing is also included as 58.3.1C in older ASME Section I codes. This drawing shows steam piping to and from the superheater as non-boiler external piping, falling under Pressure piping. But the engineering firm has the superheater outlet steam piping as boiler external piping, falling under Boiler and Pressure Vessel Code. Any thoughts?

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