Color Coding (Obligated RAL Colors):
Green (RAL 6018) – Water, Yellow (RAL 1023) – Flammable gases, Blue (RAL 5015) – Compressed air/inert gases, Red (RAL 3000) – Fire protection, Brown (RAL 8003) – Oils/fuels, Grey (RAL 7001) – Steam/vapor, Black (RAL 9005) – Waste water/sewage, Orange (RAL 2003) – Acids, Purple (RAL 4006) – Alkalis/caustics.

Flow Direction:
Mandatory arrow indicating flow direction.

Text:
Substance name or chemical formula, clearly legible, usually in Dutch.

Placement:
At regular intervals, near valves, bends, and pipe penetrations.

Text Size:
Minimum size based on pipe diameter for visibility.

Hazard Information (Obligated GHS symbols):
Where applicable, mandatory GHS hazard pictograms must be included to indicate chemical hazards such as flammability, toxicity, corrosiveness, etc.

Materials:
Labels must be durable against humidity, temperature, and chemicals.

Color Coding (Standard Colors):
Green (water), Yellow (flammable gases), Blue (compressed air/inert gases), Red (fire protection), Brown (oils/fuels), Grey (steam/vapor), Black (waste water/sewage), Orange (acids), Violet (alkalis/caustics).

Flow Direction:
Mandatory indication of flow direction with arrows.

Text:
Clear identification of pipe content by name or chemical formula, legible and in German or the relevant local language.

Placement:
Labels placed at regular intervals along the pipe, near valves, bends, and points where pipes pass through walls or floors.

Text Size:
Text height must be appropriate to pipe diameter for readability from a safe distance.

Hazard Information:
Hazard symbols (GHS pictograms) and safety information must be included where applicable.

Material and Durability:
Labels must withstand environmental conditions like humidity, temperature variations, and chemicals.

Color Coding & Banding:
Pipes are marked using base colors with additional color bands or stripes to indicate content and hazards:

• Water: Green base, sometimes with white stripes

• Flammable gases: Yellow base with black bands

• Air: Blue base, plain

• Fire protection: Red base, often with white stripes

• Oils/fuels: Brown base, may include black or white stripes

• Steam: Grey base, sometimes with white stripes

• Waste water: Black base, with white or grey stripes

• Acids: Orange base, sometimes with black stripes

• Alkalis/caustics: Purple/violet base, sometimes with white or black bands

Flow Direction:
Mandatory arrows indicating flow direction, usually placed on or near the color bands.

Text:
Pipe contents clearly identified by name or chemical formula in English.

Placement:
Labels and bands must be applied at regular intervals, near valves, bends, and pipe penetrations.

Text Size:
Text size must ensure readability from a safe distance, scaled to pipe diameter.

Hazard Information:
GHS hazard symbols and additional safety info should be included when relevant.

Material and Durability:
Labels and bands must withstand heat, moisture, chemicals, and other environmental factors.

Purpose:
Ensure safety and clear identification of pipe contents in marine environments such as ships, offshore platforms, and ports, complying with international maritime safety standards.

Standards:
Commonly follow ISO 14726 (Identification colors for shipboard systems) and sometimes incorporate elements from IMO (International Maritime Organization) and SOLAS (Safety of Life at Sea) requirements.

Color Coding:
Marine pipe marking uses a specific set of standardized colors to identify the system type:

• Light Blue: Seawater (cooling, ballast, etc.)

• Green: Freshwater (potable, boiler feed)

• Yellow: Fuel oil and flammable liquids

• Brown: Lubricating oil

• Red: Firefighting systems

• Purple: Sewage and waste systems

• Orange: Compressed air

• Black: Oil waste and sludge

Flow Direction:
Arrows or other clear directional indicators must show flow direction.

Text and Symbols:
Clear text identifying contents, sometimes including pressure or temperature info. Safety or hazard symbols are used where relevant.

Label Placement:
Labels should be placed at visible intervals along pipes, especially near valves, bends, and access points.

Durability:
Materials must be resistant to harsh marine conditions such as salt spray, humidity, vibration, and temperature extremes.