Bill, here's the scoop on the new Luxfer tanks, quite possibly what you're hearing about through the diving grapevine:
At DEMA this year, Luxfer announced that it will institute a new three-year exchange program for all its tanks made of the infamous 6351 alloy. The way it works is that the customer calls the Luxfer Customer Service Department on the following toll-free line: 1(800)764-0366 and tells the representative how many cylinders they would like to turn in. The representative will then give the person a return goods (RG) number and will give instructions on how to ship the old tanks to Luxfer. The customer will then get a $50.00 dollar voucher good towards the purchase of NEW Luxfer cylinders made from the new 6061 alloy.
The customer sends in the tanks, gets the voucher from Luxfer and the customer then purchases more Luxfer tanks.
The new alloy is purportedly much better and safer than the old 6351 and will, hopefully, not blow up as many folks. I'm sure you've seen all the websites and cases of people being blown up by the 6351's, so I won't bore you with that here.
If anyone wonders whether they have one of the 6351 tanks, just look at the original stamped hydro date. If it was stamped with a date between 1972 - 1987, it's one of the ones in question. Also, there are some questionable 1988 tanks out there as well, so if you have one with that date, call to have it checked out further (1-800-764-0366).
Anyone wishing to see the actual press release from DEMA on this matter is welcomed to jump: www.luxfercylinders.com/news/releases/20021022.shtml
Gary Zane Cofield
PSI Cylinder Inspector #12845