pve5,
for fluid conditions given you may have to do a strength weld and then a heavy expansion of the tubes into at lest in a groove close to back face of the tubesheet.Have Shell,Tubes and Tube sheet H2S proof materials.
Metengr;
I really appreciate you answer but your explanation fully applies also to the first sentence of UCS-66(d)i.e. thin UCS-materials.
The bottom line is that under the entire UCS-66(d)rules it is hardly acceptable to endorse the use of these tubes at a MDMT of -104C and this high coincident...
Thank you Metengr for your clarification which at this point is not convincing me.As I was saying in UCS-66(d)first sentence refers to all UCS mat'ls, 2.5mm and thinner to which a MDT of -48C applies.
For the vessels/components NPS 4" or smaller in P-No.1 (which by the way is a particular case...
I have to deal with a Shell and Tubes HEX where tubes in LTCS (SA334 Gr.6)are proposed by Contractor for coincident design conditions of 67Barg @-75C.This MDMT is based on ASME VIII Div.1,UCS-66(d)interpretation for which I cannot agree as:
a) - § UCS-66(b)(2) does not include UCS-66(d) as...
The WO is by far the correct choice but the WO material must be selected to fit your corrosion conditions.If you were looking for 10mm of CA I doubt your Neoprene or Buna N seal material fit into equation .The seal material selection is as tough as body material selection and shall also meet...
at 0.009% of the pipeline volume you still have a nice air bubble (+/-2.7M3)trapped at the highest point.So this is the explanation.If the hydrotest pressure stay steady for 4-6 hours at least, then your test is positive (provided temperature does not change-but you may record also temperature...
If as per EdStainless this C fiber(is it sure is C and not GRP?) filament wound may be correct on corrosion side have a look then on mechanical strength.Pipe itself (collapse pressure at 3000M may be enormous if internal pressure is low) and especially connections (cemented bell &...
Any seriuos Engineering applies a clear split between "CONTROL" and "SHUT DOWN" functions.Then the design for the one function excludes a proper work for the other.
In these equations the Actuators design is part of segregation as each function implies different parameters especially the closing...
Tsenthil was querying about a Ball Valve fire safe design (not the test).
Fire safe design applies to both soft and metal seated ball valves but the way it is achieved is practically the same:
a)A Soft seated valves: at Seats/Ball interface the seat is designed with a lip which secure the M/M...
What are you expecting for a Subsea valve? a cheap design?.
If it's Subsea (5000ft)this must be strong enough to withstand the external pressure.I do not know your design conditions but must be at least 1500# rated.Then to stroke the valve you need an actuator with ROV overide system.
In order...
