Canada–Nova Scotia Offshore Area Petroleum Operations Framework Regulations — 135
Boilers and pressure systems 135 (1) An operator must ensure that boilers and pressure systems are designed in accordance with the measures referred to in clause 9 (2)(b)(vi)(C) that are described in the operator’s safety plan. Design requirements (2) The boilers and pressure systems must be designed to (a) prevent the occurrence of an abnormal condition that could cause an undesirable event; (b) prevent an undesirable event from causing a release of liquids, gases or vapours; (c) prevent the ignition of any flammable liquids, gases or vapours that are released; (d) safely disperse or dispose of any liquids, gases or vapours that are released; (e) prevent the formation of explosive mixtures; (f) limit persons’ exposure to fire hazards; (g) monitor safe limits of pressure, temperature and fluid levels and reliably protect against exceeding those limits; (h) permit the examination of components critical to the pressure system to ensure their continued integrity; (i) allow for draining and venting at all stages of operation to (i) permit cleaning, inspection and maintenance activities to be carried out safely, and (ii) avoid harmful effects, including water hammer, vacuum collapse, corrosion and uncontrolled chemical reactions; (j) prevent the escalation in relation to the boilers and pressure systems of accidental events occurring outside of them; and (k) limit and mitigate the effects of any loss of containment of the contents of the boilers and pressure systems. Additional requirements (3) The design of boilers and pressure systems must (a) be based on standards that incorporate safety margins, that conform to good engineering practice and that involve the carrying out of analyses and numerical modelling as necessary to determine the behaviour and failure modes of the boilers and pressure systems under all foreseeable operating conditions, taking into account (i) the internal and external pressures to which the boilers and pressure systems are subjected, (ii) ambient and operating temperatures, (iii) static pressure and the mass of the contents of the boilers and pressure systems when tested or operated, (iv) foreseeable dynamic loads and reaction forces and moments resulting from, among other things, piping and its supports and other accessories, (v) structural and mechanical integrity threats, and (vi) reactions caused by changes in fluids and other substances contained in the boilers and pressure systems over time, including reactions caused by the products of the decomposition of unstable fluids or substances; (b) if hazards cannot be eliminated, incorporate safety measures that take into account (i) the need for closing and opening devices and devices to indicate their status and to prevent their opening or physical access to them while pressure differential exists, (ii) the need to contain hazardous substances and to mitigate the effects of any hazard related to their release, (iii) the surface temperature of the boilers and pressure systems, and (iv) the decomposition of unstable fluids; and (c) be approved by an authorized inspector. Loads and other factors (4) The operator must ensure that boilers and pressure systems can withstand all combinations of loads, pressures, temperatures, fluids and substances to which they may be subjected during their design service life. Materials used (5) The operator must ensure that the materials used for the manufacture of boilers and pressure systems are compatible with their operating environment and are chemically resistant to the fluids they contain during their design service life. Manufacturer’s documents and records (6) The operator must ensure that the following documents and records are obtained from the manufacturer of the boilers and pressure systems: (a) documents demonstrating that manufacturing, testing and installation have been carried out in accordance with the design specifications provided for in a quality assurance program that is approved by an authorized inspect