In TEMA code, there is a para RCB 7.165 effective differential design pressure; it was stated that "under certain circumtances the code and other regulatory bodies permit......" Can anybody advice what exactly the circumtances TEMA mentioned? What are the advantages and disadvantages if we using...
Hello, can anybody please tell me if the B16.5 welding neck flange permit to be weld overlay? i don't find it documented in the code (maybe overlook by me). And, How about those custom flanges designed base on App II in ASME sect VIII div1 or App III in Div II.
Thanks for any answers.
Hello, Can any of you guys recommend me the reliable expansion bellow (U type, single or multiple convulutions type, EJMA latest code) calculation software in the market?
Thanks
metengr,
How about if i'm using it for structural purpose (eg, anchor bolt for skirt vessel) instead of flange bolting? I understanding the code might limit its allowable stress because do not damage the flanges (might be very expensive) due to its overstress on the bolt. My thinking is, will...
metengr,
you are right, there is no yield strength for this material. Do you have any idea why this happen? is that mean it don't have any elastic limit? (seem incorrect??) how do i justify its allowable stress by lower down it by some safety factor according to ASME Sect II Part D, (eg, 2/3...
Hello, can any body tell why there is no minimum specified yield stress for the SA 307 Gr.B in ASME Section II Part D? It has a minimum specified tensile strength of 413 MPa and relatively low allowable stress (only 48.3 MPa, why?). Can any of you explain for this. Any help will be appreciated.
Hello, can anybody confirm my understanding below.
in TEMA Eight Edition, RCB-7.24 (pg69), there was a note (end of RCB-7.24) stated 'the allowable tube compressive stress shall be limited to the smaller of the code allowable stress in tension for the tube material at the design metal...
Thanks ijzer, can you please further your explanation about 'two times the shell side corrosion allowance'. may i know where this practise come from? i wish not to follow the baffle thickness given by TEMA as we would like to adopt the thinning one provided to ensure the baffle thickness is...
Hi ya, can anybody define the term 'unsupported tube length' in TEMA code? according to TEMA, its mean the span tube length between central baffles, but if one have the segmentel baffles, eg baffle#1, baffle#2. can we define it as the span length between baffle#1 and baffle #2 instead of baffle...
waskillywabbit,
I believe the standard flange should be able to withstand the full vacuum pressure without any failure. but is there any paragraph or code (evidence) stated that we just can selected it like this. is that rule of thumb?
can anybody tell how to select the rating of standard flange if there is Full vacuum case. there was no external pressure in pressure-temperature rating table. any help is appreciated.
Doct9960
may ask another question? why ASME Section II part A (material Spec) didn't call for the impact test for those duplex material thicker than 10mm?
i would appreciate if some one can answer my question below.
according to ASME Sect VIII div 1, UHA 51 d(3)(a) all austenitic ferritic duplex material steel with a nom thickness thicker than 10 mm required for impact test regardless of its MDMT. how about those duplex flange and tubesheet which...
actually this configuration is not in any skectches in fig -2, it look like sketch 4a but as you know, the back of the flange in sketch 4a don't have any bevel weld. my design got bevel weld on the back of the flange and the weld size (at the back of flange) will follow the requirement of sketch...
Hello
i have a flange which is slightly same as the sketch of ASME Sect VII Div1 Fig 2-4 (4a) but with the bevel weld at the back of the flange. what type should it belong to? since the optional type flange got one of the sameness where they all got the bevel weld on the back of flanges. Can...
