older aluminum cylinders

I was reading up about old aluminum cylinders, which are often made of less satisfactory aluminum alloys than modern aluminum cylinders. The article I was reading referred to cylinders sold in the UK. Since both the testing regime and cylinder markings are different in the UK compared to Sweden, I was interested to know about the situation here. Specifically:

a) Is it possible to tell or find out what alloy a cylinder is made of, possibly from the serial number of the cylinder?

b) What alloys were in common use for aluminum cylinders sold in Sweden circa 1980?

c) What is the standard test procedure for older aluminum cylinders in Sweden? Does it include eddy current measurements?

Reason for asking....a Luxfer aluminum cylinder from 1979 has come into my possession. It has a test stamp until 2012. Is it safe to use?

This subject may have been discussed before, but I couldn't think of a sensible search in Swedish which didn't give me hundreds of irrelevant topics.

Mark

Mark Dougherty 2009-09-01 18:39:16
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older aluminum cylinders	Mark Dougherty	2009-09-01 18:39
Sv: older aluminum cylinders	Vilhelm Eklöf	2009-09-01 19:09
Sv: Sv: older aluminum cylinders	Dmitri Gorski	2009-09-02 14:05
Sv: Sv: older aluminum cylinders	Morten Baunsoe	2009-09-02 14:25
Sv: Sv: Sv: older aluminum cylinders	Mark Dougherty	2009-09-02 15:02
Sv: Sv: Sv: Sv: older aluminum cylinders	August Höij	2009-09-02 16:06
OT....	Jonas Andersson	2009-09-02 17:18
Sv: OT....	Vilhelm Eklöf	2009-09-02 17:26
Sv: older aluminum cylinders	Leif Sörensson	2009-09-01 20:00
Annan gammal tråd	Jonas Andersson	2009-09-01 20:26
Sv: older aluminum cylinders	Mark Dougherty	2009-09-01 20:36
Sv: older aluminum cylinders	Jonas Wall	2009-09-04 23:55

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