NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
(OP)
This if for fuel oil piping on a utility boiler-
Our company works to NFPA 85 and B31.1 for fuel piping systems.
Does anyone know if nfpa or asme b31.1 has any rules or guidelines regarding the use of pipe adapters, bushings, and unions? I cant seem to find anything while reading through each book... this is for mostly small piping 1/2"-2".
I find for piping with threaded connection the pipe shall be extra strong (schedule 80)... I assume this means the fitting as well shall be schedule 80
The owner of our company has a notion that there are special guidelines though that say you can not use bushings and adapters and such... I see no reason why this cannot be used and see nothing in nfpa or B31.1 to back up his thoughts.
Our company works to NFPA 85 and B31.1 for fuel piping systems.
Does anyone know if nfpa or asme b31.1 has any rules or guidelines regarding the use of pipe adapters, bushings, and unions? I cant seem to find anything while reading through each book... this is for mostly small piping 1/2"-2".
I find for piping with threaded connection the pipe shall be extra strong (schedule 80)... I assume this means the fitting as well shall be schedule 80
The owner of our company has a notion that there are special guidelines though that say you can not use bushings and adapters and such... I see no reason why this cannot be used and see nothing in nfpa or B31.1 to back up his thoughts.





RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
Have a look at Table 126.1, which allows ASME B16.11 fittings, which includes threaded couplings, bushings, ...
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
Don't ask how I know this, please.
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
If you said you needed a fitting suitable for a 3,000 PSIG service, then perhaps the correct fitting was - in fact - a class 6000.
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
I guess I am a little confused about the pipe fittings...can you use schedule 80 pipe fittings like bushings, nipples, etc? or do the threads make the fittings too thin? B31.1 says that the pipe that is to be threaded must be at least schedule 80... so it is already taking under consideration that the threads will be cut into the pipe as it calls out the schedule 80...
How do you come up with using class 3000 fittings?
I would buy this nipple as I can not find anything in b31.1 saying we cannot use it for piping with pressure less than 100 psi. It conforms to the asme threading B1.20.1 spec
Mcmastercarr part number: 7727K191
is there anything wrong with picking it that you can think of?
Thank you for your help... I am trying hard to read through the code carefully to make sure I understand this... it is a learning experience for me. Thank you.
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
Mike Halloran
Pembroke Pines, FL, USA
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
RE: NFPA 85/B31.1 veiws on npt pipe adapters, bushings, unions - oil pipe
122.7.2-
A) "Seamless steel or nickel alloy piping materials shall be used in all areas where line is within 25 ft of equipment or other lines having an open flame. Seamless steel or nickel alloy pipe shall also be used for fuel oil systems located downstream of burner shutoff valves"
So this seems to rule out using any fittings made of anything but forged steel as our equipment is all within 25' of the flame and all downstream of the shutoff valves... so no brass fittings or ductile or malleable iron correct?