Canada Oil and Gas Diving Regulations — 11
11 (1) A diving contractor who conducts a diving operation shall use or permit to be used in the diving operation (a) only diving plant and equipment that has been examined and, where appropriate, subjected to a pressure leak test using an appropriate breathing mixture to a pressure that is not less than six atmospheres absolute and, where the maximum working pressure that may be encountered during any dive that is part of the diving operation is greater than six atmospheres absolute, to the maximum pressure plus one atmosphere (i) not more than three months prior to the day on which it is to be used, (ii) on mobilization and assembly, and (iii) following any repair, replacement or alteration of the diving plant and equipment that might affect its safety; (b) in the case of a compression chamber, only a compression chamber that (i) not more than two years prior to the day on which it is to be used, has been subjected to a pressure leak test to the maximum working pressure of the chamber using an appropriate breathing mixture, and (ii) not more than five years prior to the day on which it is to be used, has been subjected to an internal pressure test of at least 1.25 times the maximum working pressure of the chamber; (c) in the case of a pressure vessel for compressed gases that is not intended to be immersed in water, including compressed air cylinders, only a pressure vessel that has been subjected to (i) a thorough examination and internal pressure test not more than five years prior to the day on which it is to be used, and (ii) an internal inspection for corrosion not more than two years prior to the day on which it is to be used, or such longer period as is determined by the Minister pursuant to paragraph 3.2 (1)(b) of the Act; (d) in the case of a pressure vessel for compressed gases that is intended to be immersed in water, only a pressure vessel that has been subjected to (i) a thorough examination and internal pressure test not more than two years prior to the day on which it is to be used, and (ii) an internal inspection for corrosion not more than one year prior to the day on which it is to be used, or such longer period as is determined by the Minister pursuant to paragraph 3.2(1)(b) of the Act; and (e) in the case of lifting equipment for a launch and recovery system, only lifting equipment that has been tested (i) on first installation and, thereafter, before operational use of the lifting equipment following a repair, replacement or alteration, other than a routine repair, replacement or alteration carried out by a competent person, by means of a functional test, and (ii) every six months following a functional test carried out pursuant to subparagraph (i), by means of a test that tests the capability of the lifting equipment to operate safely under its maximum working load. (2) A diving contractor who conducts a diving operation shall ensure that (a) each examination and test required to be carried out for the purposes of subsection (1) is carried out by or under the supervision of a recognized body and in accordance with an acceptable standard; and (b) where a pneumatic or hydrostatic pressure test is carried out for the purposes of subsection (1), adequate precautions are taken to ensure the safety of the personnel involved, the diving plant and equipment and the craft or installation used in the test. (3) A diving contractor who conducts a diving operation shall keep a register in which are inserted or to which are attached certificates (a) containing details and results of examinations and tests carried out pursuant to subsection (1), and (b) signed by the person by whom or under whose supervision the examinations or tests were carried out, and shall retain the register (c) in the case of a register that contains certificates relating to pressure vessels, for at least five years after the day of the last entry in it; and (d) in any other case, for at least two years after the day of the last entry in it. (4