Long Weld neck flange for pressure vessel
Long Weld neck flange for pressure vessel
(OP)
Hi
Why long weld neck fanges are used for small nozzles in pressure vessels especially nozzle size of 2"and below?
Why long weld neck fanges are used for small nozzles in pressure vessels especially nozzle size of 2"and below?





RE: Long Weld neck flange for pressure vessel
RE: Long Weld neck flange for pressure vessel
Regards,
Mike
RE: Long Weld neck flange for pressure vessel
Less material items. Fewer weld. Less quality checks.
Nice and strong.
MikeG7
RE: Long Weld neck flange for pressure vessel
RE: Long Weld neck flange for pressure vessel
Only in two conditions we make LWN mandatory: (1) thermowell nozzle (2), client request.
Otherwise, we let vendor do what they like, and we ask (2) bracings for each nozzle for extra strength to prevent distortion for all kinds of situation.
If you have extra length of nozzle projection, especially at top head, WN will be easier to achieve. When LWN is mandatory, we will ask vendor to buy several LWNs, cut off flange and butt weld together to achieve the projection.
RE: Long Weld neck flange for pressure vessel
RE: Long Weld neck flange for pressure vessel
RE: Long Weld neck flange for pressure vessel
Regards,
Mike
RE: Long Weld neck flange for pressure vessel
2. Cost of one extra weld seam, gussets in case of nozzle made of pipe and separate flange. Cost factor may however differ based on fabrication/ manpower cost in the country where fabrication takes place.
Regards
Sanj
RE: Long Weld neck flange for pressure vessel