How to Identify Ships Pipelines ?

by OldSailor on March 13, 2008

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shippipelinesconfusion

Ships use liquids and gases for different applications. Ships cargo also may be liquids. Liquids may be water,fuel etc., Gases may be compressed air, refrigerants, natural gas etc., These liquids and gases are stored in tanks. The liquids or gases are supplied to different equipments at rated pressure through pumps. From the equipment the liquids and gases may return to tanks if it is a closed circuit or may be drained from the equipment if it is a open system. As the tanks, pumps and equipments are located in different places in the ship, lengthy pipelines are used to interconnect them. When the pipelines pass through the bulkheads and decks in different parts of the ship they are laid as a bunch.

As the pipelines are not transparent the contents of the pipelines are not visible. Even the flow direction can not be found out. For maintenance and fault finding, the contents of the pipelines and the flow direction of the contents must be known. Here comes the necessity to mark the pipelines with a universal color code to identify the contents and flow direction in pipelines.

Here is a typical hydraulic system

hydraulic_system

All the tags shown as suction line, discharge line, return line and drain are pipe lines.

How the pipelines are marked ?

Color code and flow directions are shown below. Markings are done in places where markings will be easily visible. Markings are done closer to valves, filters in the pipelines also.

Water Lines

Sea water,River water, Untreated water pipeline

pw_untreated

Drinking water pipeline

pw_drinking

Fire mains pipeline

pw_firemain

Hydraulic power pipeline

pw_hydraulic

Cooling water (primary) pipeline

pw_cooling_primary

Boiler feed pipeline

pw_boilerfeed

Condensate pipeline

pw_condensate

Hot water pipeline

pw_hot

Hot water above 100 degree Celsius

pw_hotover100

Hot water below 100 degree Celsius

pw_hotunder100

Cold water pipeline

pw_cold

Chilled water pipeline

pw_chilled

Oil Lines

Furnace oil line

poil_furnace

Diesel oil line

poil_diesel

Lubricating oil line

poil_lubricating

Hydraulic oil line

poil_hydraulic

Transformer oil line

poil_transformer

Gases

Compressed air line

p_compressed_air

Vacuum line

p_vacuum

Steam line

p_steam

Natural gas line

p_natural_gas

Anhydrous ammonia line

p_ammonia

Refrigerant R12

p_r12

Refrigerant R22

p_r22

Refrigerant R502

p_r502

Other Refrigerants

p_other_refrigerents

Drain line

p_drain

Acids and Alkali line

p_acids_alkalis

Electrical conduits and ventilation ducts

p_elect_conduits_ducts

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