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Marine Machinery Regulations (SOR/90-264)

Regulations are current to 2019-11-19 and last amended on 2017-02-03. Previous Versions

SCHEDULE IIIUnfired Pressure Vessels

PART I(Section 4)Design Specifications

ItemRequirements
1None.

PART II(Section 6)Plans

ItemRequired Information
1General arrangement of the installation of the unfired pressure vessel in the ship, showing means of support.
2Design working pressure, temperature, volume and nature of fluid under pressure.
3Materials, sizes and arrangement of parts under pressure, including valves.
4Details of welded seams, openings, connections, attachments and supports, including details of welding materials, methods and procedures.
5Details of the heat treatment process and testing procedures.
6Diagrammatic arrangement and a written description of the pressure source and heat exchange, as applicable, including cut-offs and alarms.
7Pressure setting, relieving capacity and venting arrangements of safety or liquid relief valves.
8Details of fusible plugs or similar devices required to protect vessels from over-pressure caused by fire or other heat hazards.
9Where a manufacturer of an unfired pressure vessel or a hydro-pneumatic tank certifies that the unfired pressure vessel or hydro-pneumatic tank was constructed in accordance with rules or codes, information set out in items 2 to 8 is not required to be submitted for
  • (a) the unfired pressure vessel if it contains only non-flammable liquid with a design working pressure not exceeding 700 kPa and a temperature not exceeding 98°C;

  • (b) the hydro-pneumatic tank if the tank has a design working pressure not exceeding 700 kPa and a temperature not exceeding 98°C, except sprinkler and foam tanks for use in fire-fighting;

  • (c) the unfired pressure vessel has a design working pressure not exceeding 103 kPa;

  • (d) the unfired pressure vessel has a volume under pressure not exceeding 150 L and a design working pressure not exceeding 700 kPa;

  • (e) the unfired pressure vessel has an internal volume not exceeding 45 L that has no limit on pressure;

  • (f) the unfired pressure vessel has an internal diameter not exceeding 150 mm that has no limit on pressure; or

  • (g) the unfired pressure vessel is a component in a refrigerating gas system in which the compressor does not absorb power in excess of 10 kW.

PART III(Subsection 12(2))Construction and Installation Inspections

DIVISION IConstruction Inspection

ItemRequirements
1Identification from material test certificates, before construction is commenced, of materials to be used, including welding metal, and of physical properties and mechanical test results obtained from material testing carried out in accordance with these Regulations.
2Verification that welding was carried out by welders certified by a Provincial Government of Canada, or another authority having similar standards where the welding was carried out outside Canada, for the class of work to be done.
3Inspection of welds including non-destructive test examination and verification of the heat treatment process in accordance with rules or codes.
4Verification of plate preparation and alignment prior to assembly and, on completion of all construction operations, confirmation of circularity of shells.
5Identification from component inspection certificates of components related to the safety of the unfired pressure vessel.
6Inspection of components and their installation, including tubes and tube plates.
7Inspection of the constructed unfired pressure vessel.
8Witnessing of hydrostatic pressure tests in accordance with rules or codes.

DIVISION IIInstallation Inspection

ItemRequirements
1Verification of correct alignment of securing arrangements.
2Verification of correct adjustment and operational condition of the connection of the unfired pressure vessel to associated systems.
3Verification of correct adjustment and operational condition of safety, control and monitoring devices.
4Verification of reliability and sufficiency under trials up to the assigned working pressure under normal working conditions for a suitable endurance period, taking into consideration the size and complexity of the unfired pressure vessel and its pressure source.

PART IVPeriodic General Inspections and Periodic Special Inspections

DIVISION I(Section 19)Periodic General Inspection

ItemRequirements
1Correct adjustment and operational condition of safety devices.
2Operational condition of liquid gauges and attached valves.
3Locations where fluid leakage, metal wastage or metal deformation may occur.
4Correct adjustment of controls and monitoring systems.
5Operational condition of alarm systems, particularly where the unfired pressure vessel is designed for non-continuous local supervision.

DIVISION IIPeriodic Special Inspection

SUBDIVISION I(Subsection 20(1))Parts to be Inspected
ItemRequirements
1Internal fluid spaces as far as practicable with all spaces clean and removable components removed and where, due to construction features, an adequate internal inspection cannot be carried out, a hydrostatic pressure test of 1.25 times the assigned working pressure of the spaces.
2Access and inspection openings and fusible plugs where fitted.
3Pressure-vessel mountings, including safety valves and liquid-level gauges, without opening up and cleaning unless there is apparent damage, improper operation or deteriorated condition of those components.
4Float chambers and float mechanisms on liquid-level regulators, following opening up and cleaning.
5Pipes, actuators and other components, incorporated in self-regulating and monitoring systems, as far as is practicable, without dismantling where their general condition shows that they are suitable for further service.
6Seams, mountings, seatings and welded attachments, following the removal of insulation and sheathing, to the extent considered necessary by the inspector, on the basis of the general condition of the unfired pressure vessel.
7Except where, on the basis of the periodic general inspection, there is apparent damage, improper operation or deteriorated condition of components, items 1 to 6 do not apply where
  • (a) the assigned working pressure does not exceed 103 kPa;

  • (b) the internal diameter does not exceed 150 mm;

  • (c) the volume or part thereof above the normal working level of a liquid does not exceed

    • (i) 45 L, or

    • (ii) 150 L when the assigned working pressure does not exceed 700 kPa; or

  • (d) the unfired pressure vessel is a component in a refrigerating gas system in which the gas compressor does not absorb power in excess of 10 kW.

SUBDIVISION II(Subsection 20(2))Intervals
ItemRequirements
1Steam-heated steam generators, at intervals not exceeding 2 years.
2Water evaporators and steam condensers, at intervals not exceeding 5 years.
3Unfired pressure vessels containing air or air and water under pressure, at intervals not exceeding 5 years.
4Unfired pressure vessels containing non-corrosive liquid or non-corrosive liquid and gas under pressure, at intervals not exceeding 20 years.
5Liquid tubular heat exchangers with one fluid side opened up, at intervals not exceeding 5 years, and without further dismantling unless dismantling is considered necessary by the inspector on the basis of the general condition of the heat exchangers.
 
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