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Are SLC-related scuba tank ruptures widespread?

  • No. Of the more than 40-million all-aluminum cylinders manufactured by various companies over the last 45 years, only 20 SLC-related or suspected-SLC ruptures have been reported to regulatory authorities around the world. All these ruptures were in cylinders made from 6351 alloy.
  • Of these ruptures, 11 have been scuba cylinders. Six occurred in the United States, and the remainder occurred elsewhere in the world.

Let's look at the actual record.

Aluminum scuba tank ruptures

DATE LOCATION LISTED CAUSE INJURY? MANUFACTURER

Oct-88

Southport, Australia

SLC

No

Luxfer

Jun-94

Miami, Florida

SLC

Yes

Luxfer

Jan-98

Corlette, Australia

SLC

No

CIG Gas Cylinders*

Feb-98

Riviera Beach, Florida

SLC

Yes

Walter Kidde

Aug-98

Tairua, New Zealand

SLC

Yes

Luxfer

Dec-98

Tampa, Florida

Not determined

No

Luxfer

Apr-99

British Colombia

SLC

No

Luxfer

Mar-00

Key Largo, Florida

SLC

Yes

Walter Kidde

Jun-00

Miyako Island, Japan

SLC

No

CIG Gas Cylinders

Jul-04

Oahu, Hawaii

Not determined

Yes

Walter Kidde

Sep-04

Videlia, California

Not determined

No

Walter Kidde

Jan-05

Perth, Australia

SLC

No

CIG Gas Cylinders

Jun-07

Rhode Island

SLC

No

Luxfer

*Luxfer Gas Cylinders acquired CIG Gas Cylinders, an Australian manufacturer, in 1997. CIG Gas Cylinders had stopped using 6351 aluminum alloy in 1990, and Luxfer did not use 6351 alloy for cylinders that Luxfer subsequently manufactured in Australia under the name Luxfer Australia. Only Luxfer’s proprietary 6061 aluminum alloy—which is not susceptible to sustained-load cracking—was used for Luxfer Australia cylinders.

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