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Subsea oxy-arc cutting – risk of explosion

The International Association of Oil & Gas producers (OGP) has published the attached safety flash (OGP safety alert number 227), entitled Subsea oxyarc cutting – risk of explosion. The information can also be found at

The safety flash recommends that double isolations that perform a complete break in both poles of the circuit should be used between the surface generator and the diver to form a more effective and dependable isolation.

Members are reminded that subsea oxy-arc cutting operations are addressed in IMCA D 003(Guidelines for oxy-arc cutting) and IMCA D 022 – (Guidance for diving supervisors– chapter 12, section 15).

Guidance contained within the diving supervisor’s manual includes that the knife switch should be mounted in such a way that it cannot fall or be knocked into the on position. Ideally it should be a double pole switch enclosed in a protective wood or plastic box with only the handle showing.

Members are also reminded that both IMCA D 003 and IMCA D 022 are currently under review.

Safety Event

Published: 15 December 2010
Download: IMCA SF 08/10

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