EdStainless,
In this case the CS will have practically no stress since it's only a liner that separates the fire tube (SA 106 Gr.B) from the flame. The fluid outside this liner is still combustion gas and on the inside there is a flame.
The flame may be touching the liner's inside wall; but...
MJCronin,
See ASME Sec II Part D, Table 1A. Now, if you say this is not applicable, tell me where in the ASME can I find what you say is the limit.
Apart from this, I know for a fact that fire tubes are made of plain CS (SA 106 GrB) and they work at above 500°C (932°F). They last many years...
I don't aggree with 850°F as a limit temperature for carbon steel. Take SA 516 Gr70 for example, it can be used at up to 1000°F according to asme div VIII.
I know Inconel is the best material for this application; but the question is: if I'd used CS, how long will it last? For this application...
SloFlo,
Try with duplex type stainless steel. I think this is the corect material. We, though, used 316L for a vessel having a sodium chloride solution because duplex was not an option.
Hope it's helpfull enough!
Diego.
I suppose there are some flames (outer feather) liking the inner tube's wall, since it's only 600mm ID. What I do know is that direct flame on Incoloy will melt it down. Not taking into account the cost and time that will demand to obtain this material.
The question is how can I estimate the...
Hi,
I'm designing a gas heater in which a salt bath is heated by 2, 650mm OD fire tubes. These fire tubes are conected to a burner at one end, which delivers a 2.5m long flame with 750mm in diam, 1.6E6 Kcal/h and which has 2000°C at its hotest point (inside feather). For protecting the fire...
According to a senior design eng of our firm, the correct material for this vessel (design temp= 100/-128 °C) is SA240 TP304L.
According to ASME Secc 2D (Metallurgical Phenomena), the only materials which do not show a decrease in the tensile yield nor ductility measured as percent elongation...
Mech151,
Cosmos is a good option for simulating the final design so as to check for part's interference; but I'm looking for a more mathematical way of building a mechanism without having to draw it.
I don't know if MotionView will let me do that.
Thanks,
Diego.
Hi,
Does anyone know of any software for simulating rigid body movement?? I'm looking for a software to model rigid bodies as bars with specified inertia properties and relative constraints. I wouldn't like to draw the assembly like for example when using SolidWorks.
I used Matlab...
Thank you very much for your fast replies. I think SnTMan is right about "what can you justify to customers". I personally think that since verifying this through finite elements is something not so easy, old guys tend to stay on the safe side and simply not go for this alternative.
Hi,
I had a discussion with my collegue at work because he thinks that the nozzles attached to an elliptical head must be placed inside a circle of diam = 0.8 Head's OD.
Refering to the ASME code UG-37, I only found that in case the nozzles (with their reinf pad) are included in a 0.8*(Head's...
