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Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
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Alternative Alloys for Grade B7M Heat Exchanger Studs in Sour Service?
You would be better off getting your B7M bolts coated to avoid the pitting, a combination of electroless nickel and PTFE (i.e.: any of the proprietary coatings like Zylan). If you wanted overkill then you could get them hot-dip spun galvanized. It doesn't sound like your climate is that...- PVPguy
- Post #11
- Forum: Corrosion engineering
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head exchanger leak repair
That is not normally a good solution. The design of the clamp (leak box) becomes very cumbersome, since you have to clear the OD of the flange and there is rarely enough space to use dished heads, so then the end plates must be flat, which means very thick, which means lots of distortion when...- PVPguy
- Post #6
- Forum: Mechanical engineering general discussion
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FEA on pipe flange below MDMT
Respectfully disagree with TGS4 on this one. FEA will get you a few things: 1) You can calculate the thermal transient response of the flange to the upset condition. This will give you the metal temperature of the flange during the upset. Depending on the size/class of the flange it will take...- PVPguy
- Post #3
- Forum: Finite Element Analysis (FEA) engineering
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Explosive Decompression concerns with Flexible Graphite
The full name for flexible graphite used in gaskets, packing and the like is "Exfoliated Flexible Graphite". In other words they chemically expand the graphite structure (add voids) in order to get a product with some "squish". So in answer to your question, yes it does compress under...- PVPguy
- Post #5
- Forum: Valve engineering
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ASME DIv. 1 vs Div. 2 Flange Stress Factor?
Oh yes, and the h/ho limits are just the limits over which the curve fit is accurate.- PVPguy
- Post #6
- Forum: Boiler and Pressure Vessel engineering
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ASME DIv. 1 vs Div. 2 Flange Stress Factor?
Yes, I can confirm that as part of the effort to remove graphical approaches from the code and make it more computer program friendly, they curve fit the old equations with new ones. The accuracy of the new equations is within about 3% across to full range of the variables, so if you compare...- PVPguy
- Post #5
- Forum: Boiler and Pressure Vessel engineering
