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Safety alert - Cylinder design approvals withdrawn
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Safety alert - Cylinder design approvals withdrawn

Safety alert; August 2017

SCUBA and SCBA cylinders manufactured from aluminium alloy 6351.

Download the Cylinder design approvals withdrawn Safety Alert [PDF 52KB]

 

Summary

WorkSafe New Zealand considers that there are health and safety risks arising from SCUBA and SCBA cylinders manufactured from aluminium alloy 6351, and has withdrawn approval for cylinder designs which used this alloy.

Testing and filling stations should not test or fill any SCUBA or SCBA cylinder made from aluminium alloy 6351 listed in the table overleaf from 31 October 2017.

 

Background

In 2016, there were two serious harm incidents (Sulawesi, Indonesia and Cronulla, Australia) following the catastrophic failure of SCUBA cylinders manufactured from the aluminium alloy 6351. For further information, view the WorkSafe hazard alert which was released after these incidents.

 

Withdrawal of cylinder design approvals

WorkSafe has, under regulation 79 of the Hazardous Substances (Compressed Gases) Regulations 2004, withdrawn approval for SCUBA and SCBA cylinder designs which used aluminium alloy 6351.

This is effective from 31 October 2017 and is recorded on the Registers of Gas Cylinders.

In addition, there are cylinders made from aluminium alloy 6351 which have been issued with special LAB numbers – LABxxxxSP. Any aluminium cylinder with a LABxxxxSP stamp should be checked against the table overleaf.

The withdrawal of these cylinder design approvals is supported by the Cylinder Testing Laboratory Association (CTLA) and the New Zealand Underwater Association (NZUA).

 

Duties of testing and filling stations

As a person conducting a business or undertaking (PCBU), you must ensure the health and safety of workers, and that others are not put at risk from your work. You must eliminate risks that arise from your work so far as is reasonably practicable.

Testing and filling stations should not test or fill any SCUBA or SCBA cylinder made from aluminium alloy 6351 listed in the table overleaf from 31 October 2017.

 

List of cylinders affected by the withdrawal of cylinder design approvals

MANUFACTURER

DATE OF MANUFACTURE

COUNTRY OF MANUFACTURE

DESIGN SPECIFICATION

LAB NUMBERS

All
(unless specified below)

Jan 1972 –
June 1988

UK, US

DOT E 6498
DOT SP 6498

DOT E 7042
DOT SP 7042

DOT E 8107
DOT SP 8107

DOT E 8364
DOT SP 8364

DOT E 8422
DOT SP 8422

 

Luxfer Gas Cylinders Ltd

 

US

DOT E 6498

LAB 143a LAB 148a LAB 193a

Luxfer Gas Cylinders Ltd

Prior to
Dec 1989

US

DOT 3AL

LAB 143b LAB 148b LAB 193b

CIG
(Luxfer Gas Cylinders Ltd)

Jan 1975 –
Dec 1990

Australia

AS 1777

LAB 056
LAB 137 a/b
LAB 138 a/b
LAB 139 a/b/c
LAB 261 a/b/c
LAB 450
LAB 625
LAB 626
LAB 627
LAB 628

Walter Kidde

 

US

DOT E 7042
DOT SP 7042

 

Walter Kidde

Prior to
Feb 1990

US

DOT 3AL

 

Luxfer Gas Cylinders Ltd

 

UK

DOT E 8364
DOT SP 8364

 

All

Prior to
1984

US

DOT E 7235
DOT SP 7235

DOT E 8023
DOT SP 8023

DOT E 8115
DOT SP 8115

These cylinders have a 15-year authorised service life.

Luxfer Gas Cylinders Ltd

Jan 1970 –
Dec 1994

UK

HOAL 2
Others

 


 

Any questions, contact hsinfo@worksafe.govt.nz or 0800 376 234.

 

Last updated 9 August 2017