...
Oh, what were REEs you got from W and F, and for what specific tanks (that is to say, how did you describe them when you inquired? We are collecting REEs.
In both cases, I just asked nicely. Explained the REE wasn't stamped on the tank and that many local hydro shops are reluctant to go through all the work of calculating it from scratch. Asked that they look at their original manufacturing documents (or in the case of Worthington, the manufacturing documents they acquired when they purchased Heiser). Provided serial numbers and original hydro dates as well of course.
The emails are attached below. Glad you are compiling the numbers. Would be nice to have a central place to get these from instead of one-off inquiries to manufacturers...who eventually might get sick of it and stop being so nice. Hopefully hydro centers will accept the numbers even if not direct from the manufacturer.
Have a feeling REEs may have changed over time for different serial ranges, so might make sense to keep track of that too. Tank serials are included below.
Kind regards,
Matt
Beuchat LP95:
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Dear Matthew,
having had a closer view on the matter together with our Quality Experts we kindly inform you, that the REE not been determined at the time when the cylinders were delivered to Beuchat, and therefore was also not stamped on the cylinders.
But based on the manufacturing certificates in our records we have now calculated the REE value for the concerned cylinders as follows (manufact. number 8255025/K302191):
REE: 55 ml
based on:
Total expansion: 50 ml
Nominal wall thickness: 7,0 mm
Outside diameter: 204 mm
Average volume: 12,5 lt
Test pressure: 4834 psi
Hoping to have been of assistance to you and best regards,
...
CUSTOMER SERVICE REPRESENTATIVE
Worthington Cylinders GmbH
Beim Herrenhaus 1
A-3291 Kienberg/Gaming
Austria
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Email from faber regarding OMS branded LP125s and Scubapro branded LP89s. The tank re-brand name and capacities in [] were added by me.
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Dear Sir,
We refer to your mail dated 3rd August.
Normally enquiries like yours one are related to the re-validation of the plus ("+") on the cylinders at the moment the cylinders are re-tested.
We are not involved in the re-testing of our cylinders.
However on this specific argument, with the assistance of an Independent Inspection Agency (Arrowhead Industrial Services Inc.), we had reviewed in the past the procedures relative to the re-testing of cylinders with plus ("+") marking.
The result of the analysis is that according to 173.302 of the Code of Federal Regulations 49 Parts 100 to 185 Revised at October 1,
2000: "Compliance with average wall stress limitation may be determined through computation of the elastic expansion rejection limit in accordance with CGA Pamphlet C5 or through the use of the manufacturer's marked elastic expansion rejection limit (REE) on the cylinder".
We therefore suggest you to contact a competent center that is able to follow the procedures of 173.34 of the "code of federal regulations" 49 parts 100 to 185 Revised as of October 1,2000 for the re-test operations and 173.302 of the "Code of Federal Regulations"
49 parts 100 to 185 Revised as of October 1,2000 for the re-validation of the plus ("+").
However, in case you have some difficulties to find such a center, please note that the REE values of the cylinders mentioned in your mail are:
89/9018/163, REE 75 [(LP89 Scubapro)]
89/9011/122, REE 75 [(LP89 Scubapro)]
95/9074/099, REE 98 [(LP125 OMS)]
95/9074/123, REE 98 [(LP125 OMS)]
Yours faithfully,
Faber Industrie Spa
...
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