Abstract
ABSTRACT This paper is directed to the offshore drilling industry which is now using electronic instruments and systems in classified (hazardous) locations more than ever before. Much of the information, however, is applicable to onshore drilling. National and international requirements, codes and regulations pertaining to the use of electrical/electronic systems and instrumentation in hazardous locations on offshore drilling units are outlined and discussed. The agencies and regulatory bodies included are the United States Coast Guard, Minerals Management Service, the Canadian Coast Guard, American Bureau of Shipping, Lloyds Registry, the United Kingdom Department of Energy, Norwegian Maritime Directorate and Det Norske Veritas. The paper discusses the applicable standards, approvals and certifications required and/or accepted by these agencies. The types of protection for electrical equipment (eg. intrinsic safety, explosion-proof, pressurization, increased safety, etc.) and their acceptance are itemized. Simularities and differences in acceptance are highlighted. Information and suggestions are offered on how the regulations can be met in an efficient and cost effective manner. This applies to both electrical instrumentation installed on the drilling unit in the construction phase and instrumentation added after the drilling unit is in operation.
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