B 31.3 Special flange CRN
B 31.3 Special flange CRN
(OP)
Hello friends
if nozzle fitting made by special flange ( by doing machining)
it is design under B 31.3 COME UNDER PIPING FLOW , do i have to register for CRN.
I think if any std.flange OR Special flange design calculation is done under regular piping no need to be register for CRN.
need your opinion.
regards
stan
if nozzle fitting made by special flange ( by doing machining)
it is design under B 31.3 COME UNDER PIPING FLOW , do i have to register for CRN.
I think if any std.flange OR Special flange design calculation is done under regular piping no need to be register for CRN.
need your opinion.
regards
stan





RE: B 31.3 Special flange CRN
RE: B 31.3 Special flange CRN
RE: B 31.3 Special flange CRN
One may have its design registered with the piping design registration. You obtain a CRN for the entire piping system including that unusual component, providing design information to the satisfaction of the provincial registration agency for the entire piping design including the design of that part.
If you want to make many of them and offer them for sale, you will require something akin to the Category H Fitting registration, where you obtain a CRN for the component.
RE: B 31.3 Special flange CRN
In general, all flanges fall under Category B fitting per Table 1 of CSA-B51. Any special flange shall be registered with Authority having Jurisdiction, in this instance, RBQ in Quebec.
Where this special flange is connected? What is special about it and why not to use regular ASME flange?
Regards,
Curtis
RE: B 31.3 Special flange CRN
RE: B 31.3 Special flange CRN
RE: B 31.3 Special flange CRN
RE: B 31.3 Special flange CRN
You are correct! If a special flange is part of another assembly welded together, in this case it will be treated as a part of this H-fitting.
However, if you need a companion flange, you need in your piping to attach to this special flanged assembly, you will need B-fitting registered for the special flande. In latter case you will need two CRN registrations - H-Fitting + B-Fitting.
Thanks,
Curtis
RE: B 31.3 Special flange CRN