roca, in case of a column / a large vessel where you cant just fabricate the whole vessel and load test it in a shop, you just have to fabricate the shell course with the lugs / trunnions attached to it and test them separately (with hydraulic / mechanical load) its a matter of agreement b/w you...
CuMO, as mentioned earlier those calculations were performed already and the vessel will undergo PWHT so overlapping of HAZ b/w welds are not an issue here. Thanks!
BEHANAN, I think you might have misinterpreted your inputs because the 'G' values we consider for transportation are much higher than what we consider for seismic (the range 0 to 0.4g is only for seismic design) in your case I believe it is Gx = 1.5 x 1g; Gy = 1.5 x 1g; Gz = 2 x 1g (where, 1g is...
Gents, I also have some doubt on a similar subject. Can we fabricate flanges (without hub, for e.g. Fig 2-2 (1a)) from machined plates. I understand that the limitation of 2-2 (d) doesn't apply to flanges without hub. But for some metallurgical reason I was told to fabricate flanges from forging...
kurtz, It is recommended to model the piping components at their actual sizes (As built / available market sizes) in order to obtain accurate dead loads, after all it is your primary load for support designs.
roca, proof load testing of lifting lugs are a common practice
- you hire a certified third party to perform the load test
- they'll attach your lugs to blocks of steel / concrete / hydraulic loads (calibrated loads)
- the lifting engineer will make sure that the lug is oriented at its critical...
BEHANAN, as r6155 mentioned, I'd recommend you to follow "Design manual 4th edition by Dennis R Moss" its one of the widely recognized book with detailed and comprehensive methods for Design/Analysis. And, don't forget evaluate the stress induced on shell / head due to rigging / lifting loads...
XL, no its not the same my query is regarding the branch on tee itself anyway we've raised this query to ASME. I'll update upon their response in the mean time if anyone has faced the same issue kindly share your experience.
XL, as SnTMan mentioned, VIII-1 doesn't cover this issue due to the limitation on Rn/R ratio. I've searched the "ASME Interpretations Database" on "UG-44 & UG-11", interestingly there is not a single query on the use of Tee's with nozzles under UG-44, but on a similar case for 'B16.9 Cap with...
MK, the design and construction of the vessel is based on Sec VIII Div-1
XL, B31.3 has provisions to calculate reinforcement for welded branch connections but does that apply here since it isn't a welded connection, moreover B31.3 doesn't outline any limitation of d/D ration, not that I know...
Dear gents,
I'm designing a Vertical separator which is fully made out of ASME standard fittings (12" NB - Sch.100) which has an equal tee as part of the shell. The tee has a 2" NB nozzle opening, so does this mean that the equal tee is considered as modified [not covered under UG-11(c)(1)]?
If...
Does standard pipe fittings come with additional length for machining / beveling allowances?
I just noticed that pipe fittings when ordered with 'plain end' requirements comes with an additional 2~3 mm straight face length.
Is this a requirement of ASME or any other manufacturing standard...
Gents,
Just an update! the most common reason I've heard so far for ground flushing before internal coating is as "Compositepro" mentioned tiny air pockets may form at the weld reinforcement edges that bursts latter in service exposing bare metal to corrosive fluid. So we are ground flushing...
