Marine Machinery Regulations (SOR/90-264)

Regulations are current to 2019-07-01 and last amended on 2017-02-03. Previous Versions

SCHEDULE XICompressed Air and Refrigerating Gas Systems

PART I(Section 4)Design Specifications

ItemRequirements
1Means shall be provided to prevent over-pressure in any part of compressed air and refrigerating gas systems and in water jackets or casings of compressors and coolers that may be subjected to over-pressure due to pressurized air or gas leakage.
2Where necessary, engine starting compressed air arrangements shall be adequately protected against the effects of backfiring and internal explosion in the starting air pipes.
3All discharge pipes from starting air compressors shall lead directly to the starting air receivers, and all starting pipes from the air receivers to main or auxiliary engines shall be entirely separate from the compressor discharge piping system.
4Means shall be provided to reduce to a minimum the entry of oil into the air pressure systems and to drain those systems.
5Where soldering is to be used for piping connections, the metal shall be silver solder.

PART II(Section 6)Plans

ItemRequired Information
Compressed Air Systems
1General arrangement of unfired pressure vessels, compressors, air-driven machinery, valves, piping, moisture traps, reducing valves, safety valves, pressure gauges and drainage arrangements, particularly where susceptible to frost damage.
2Installation details indicating assigned working pressures, temperatures and flow rates.
3Materials, sizes, capacities, design working pressures, temperatures, testing arrangements and procedures of compressors, air driven machinery, piping, valves and other components.
4Details of
  • (a) pipe connections to flanges or other joining arrangements;

  • (b) securing arrangements of compressors, air driven machinery, piping and allowances for vibration; and

  • (c) protection against piping damage and over-pressure to or from cooling fluid in integral jackets.

5Information set out in items 1 to 4 is not required to be submitted for
  • (a) ships not in excess of 18 m and certificated to carry not more than 12 passengers; or

  • (b) systems with an assigned working pressure not in excess of 103 kPa.

6Information for valves and similar minor components referred to in item 3 is not required to be submitted where a manufacturer or an approved classification society certifies that the types of valves or similar minor components have been designed and constructed in accordance with rules or codes.
7Information for compressors or air driven machinery referred to in item 3 is not required to be submitted where an approved classification society certifies that the compressors or air driven machinery have been designed and constructed in accordance with rules or codes except that the driving or driven components shall meet the requirements of Part II of the applicable schedule of Schedules I to XV.
Refrigerating Gas Systems
8General arrangement and location of compressors, valves, driers, strainers, oil separators, safety devices, sight glasses, piping, temperature and pressure gauges, alarms, condensers, liquid receivers, evaporation arrangements, refrigerated and air conditioned spaces.
9Installation details indicating assigned working pressures, temperatures and capacities.
10Materials, sizes, capacities, design working pressures, temperatures, testing arrangements and procedures of compressors, piping, valves and other components.
11Details of
  • (a) pipe connections to flanges or other joining arrangements;

  • (b) securing arrangements of compressors and piping, allowances for vibration, thermal expansion and contraction and insulation;

  • (c) protection against piping damage and against over-pressure to crankcases and to or from cooling fluid in integral jackets of machinery; and

  • (d) ventilating refrigeration machinery spaces and, for ammonia systems, the gas containing and clearing methods.

12Information set out in items 8 to 11 is not required to be submitted for
  • (a) ships not in excess of 18 m certificated to carry not more than 12 passengers; or

  • (b) systems where the power absorbed by the gas compressor is not in excess of 10 kW except where the gas is ammonia.

13Information for valves and similar minor components referred to in item 10 is not required to be submitted where a manufacturer or an approved classification society certifies that the types of valves or similar minor components have been designed and constructed in accordance with rules or codes.
14Information for compressors referred to in item 10 is not required to be submitted where an approved classification society certifies that the compressors have been designed and constructed in accordance with rules or codes except that the driving motors or engines of the compressors shall meet the requirements of Part II of the applicable schedule of Schedules I to XV.

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

DIVISION IConstruction Inspection

ItemRequirements
1None.

DIVISION IIInstallation Inspection

ItemRequirements
1Identification from component inspection certificates, before installation is commenced, of compressors, piping, flexible hoses, components and materials to be used, including welding or brazing metal.
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.
4Witnessing of hydrostatic pressure tests and for a refrigerating gas system, verification that gas leak testing has been satisfactorily carried out in accordance with rules or codes.
5Inspection of securing arrangements of compressors and heat exchangers, connection of piping to associated systems and verification of correct adjustment and operational condition of safety, control and monitoring devices.
6Witnessing of operational tests of the system in accordance with rules or codes.
7Items 1 to 6 do not apply to
  • (a) non-essential ship systems containing compressed air and having an assigned working pressure not exceeding 103 kPa; and

  • (b) refrigerating gas systems where the power absorbed by the gas compressor is not in excess of 10 kW, except where the gas is ammonia.

PART IVPeriodic General Inspections and Periodic Special Inspections

DIVISION I(Section 19)Periodic General Inspection

ItemRequirements
1For air and refrigerating gas compressors and air-driven machinery, where applicable and, in the opinion of the inspector, practicable, verification that the compressors, air-driven machinery, cooling systems, control, monitoring alarm and safety devices are in correct adjustment and operational condition.
2For compressed air and refrigerating gas piping systems, where applicable and, in the opinion of the inspector, practicable,
  • (a) inspection of securing and insulating arrangements of piping systems and of locations where fluid leakage and excessive vibration may occur; and

  • (b) verification that valves and fittings within the system are in correct adjustment and operational condition.

3Items 1 and 2 do not apply to
  • (a) non-essential ship systems containing compressed air and having an assigned working pressure not in excess of 103 kPa; and

  • (b) refrigerating gas systems where the power absorbed by the gas compressor is not in excess of 10 kW, except where the gas is ammonia.

DIVISION IIPeriodic Special Inspection

SUBDIVISION I(Subsection 20(1))Parts to be Inspected
ItemRequirements
1For compressed air systems
  • (a) all compressor and air driven machinery external parts and internal parts of crankcases or rotary machinery casings without further dismantling if the general condition of the machinery shows that it is suitable for further service;

  • (b) compressor machinery shut-off valves, safety devices and other components without dismantling if the general condition of the machinery shows that it is suitable for further service; and

  • (c) all securing arrangements without dismantling if a general examination shows that the condition of the components is suitable for further service.

2Item 1 does not apply to non-essential ship systems containing compressed air and having an assigned working pressure of not less than 103 kPa.
3No periodic special inspection is required for complex mechanisms where written information is provided to the inspector from firms specializing in the reconditioning of these parts indicating that the parts are in good order and adjustment.
SUBDIVISION II(Subsection 20(2))Intervals
ItemRequirements
1At intervals not exceeding five years.
 
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