Code boundary issue 2

[fatcobra]

Gentelmen,

I'm back with another issue, We are building a HRSG type boiler. My drawings supplied by the designer call the Interconnecting pipe, which connect the HP, IP, LP, drums to the internal modules as Section 1 Boiler Proper. My AI is calling this same piping Section 1/B31.1 wich totally changes the NDT required. The design company published a weld schedule, in which all required NDT is listed. My list matched this exactly, until the AI made his interpatation. What would be the best course of action to argue this point with my AI. I built another HRSG, just down the road from here using a AI from the same office, his interpatation matched the designers. Can the AI change the designers boundaries.

 

[metengr]

Your AI is correct. Boiler piping is under administrative Authority of Section I. However, the technical requirements of B31.1 apply.

 

[lostsailor]

fatcobra,
Back in the 90's I was the AI on a number of field erected, modular type HRSG units so I understand your confusion. See Figure PG-58.3.1 of Section I, metengr and your AI are correct.
Regards,
RLS

 

[fatcobra]

Guys this piping goes directly from the modules Which is boiler internal piping, to the Drums which is also Boiler Internal piping, how is it possible to have a two foot code break between the two.

 

[fatcobra]

Also, how could one of the leading designers in HRSG type boiler's, whom have built these on the same design all over the united states, have been incorrect in every one they have built in the past. These are cookie cutters the same rules apply to every one. HRSG type boilers are not the same as convential boilers, and there fore boundary specifications have to be different. If you look at PG 58.3.1 everthing classified as BEP is leaving the boiler. The piping I am discussing goes directly from the HP drum into the HP evaporator, there is no valve of any type.

 

[lostsailor]

fatcobra,
Relax, all is well. Read the Preamble to Section I, fourth, fifth, and seventh paragraphs.
Regards,
RLS

 

[metengr]

fatcobra;
Please read the Preamble in Section I. This is the first thing one must do to completely understand what is considered boiler proper and individual components that are connected together.

 

[fatcobra]

I read this last night, but as I am fairly new to the interpatation game, I wanted to see if i was reading it correctly. Thanks guys.