Boiler Hydrotest

[sarahde]

Kindly advise what should I do if for some reason I have to cut and replace our first valve on the ASME boiler boundry. What does code say on the operated boiler with that case, thanks.

 

[Shmulik]

It seems that this topic (or something close to it) had already been discussed:
thread794-42433

 

[sarahde]

Shmulik,
Thread 794-42433 is talking about replacing PRV, not mentioned weather weld connection or flange connection type of PRV. I am more interested on the cutting weld job, which I understood that will require hydrotest, but I am not 100% sure. Is anybody could help me out. Thanks.

 

[spt]

I will assume this is a field erected boiler designed to the requirements of the ASME BPVC having an operating pressure, temperature and/or a diameter that exceeds the allowable limit for threaded attachments.

This action would be classified as a repair. If you desire to continue having a boiler that complies with and is certified to the ASME code, then the repair should be accomplished in accordance with the NBIC ANSI/NB-23, Part RC Repairs And Alterations Of Pressure Retaining Items.

The boiler will require a pressure test and possibly some NDE depending on material and operating conditions. A company in possession of a current and valid NBIC “R” stamp should be able to detail the specific requirements.