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> Perhaps you should get a metalurgist to explain why a hydro test is ... > > > faber tanks (LP's) that are rated at 2640 here in the states are rated (off > > the top of my head) at appx. 3400-3500psi in Europe ... > > 120's do have a purpose, but give me my 104's in a cave ANYTIME!!!! > > I've heard this a number of times, and have also heard that the > European tanks have thicker walls, are tested to different standards, > are made from different alloys, and so forth ... > don't think that there have been any steel tank failures ... I still have some general questions which should, once and for all, show exactly how much I don't know about tanks: 1. Why is it that the LP tanks are thicker, heavier, (stronger?), and are actually rated to be overfilled beyond the rated pressure, unlike the HP tanks? This overfill rating is, in turn, exceeded by most active technical divers, I believe. It just defies logic that I can get better performance out of a LP tank. Is this like the stereo mfrs. saying "our amp puts out 300 watts music power" when it's about 50 watts RMS? Is this what Sherwood has done in order to hype their product? 2. There is a dive shop in Marathon that refuses to touch anything steel. The owner berated me rudely for not using AL. He is afraid, very afraid, of steel and has a "failed" steel tank cross-section hung on the wall for effect. I laughed at his stupidity and he at mine. Who is dumber? (I'm kidding. I know the answer to this one.) 3. I'd like to solicit more detailed explanations of what it is about 104s that make them so completely superior to every other tank. And, yes, I've been reading the thread. "Bouyancy is perfect." Why? Why is -9 lbs. empty better than -13 or -2? Is it a big deal only for caving or do the advantages apply to other types of diving as well? Use humor, sarcasm, flames, and insults--whatever you want. But please have a clue. tj
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