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Question

The colour code used for hose pipe for oxygen line is _______

This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is

Black

Understanding Oxygen Line Colour Codes

In medical and industrial settings, standardisation of equipment is crucial for safety, especially when dealing with gases. Different gases are assigned specific colour codes for cylinders, pipelines, and associated equipment like hose pipes. This colour coding helps users quickly identify the type of gas being handled, preventing potentially dangerous mix-ups.

Various international and national standards dictate these colour codes to ensure consistency. For example, standards like ISO 32 or colour codes specific to regions (like the UK or USA) specify these conventions.

Standard Colour for Oxygen Hose Pipes

According to common standards for medical gases, the colour code for equipment associated with oxygen supply lines, including hose pipes, is distinct and universally recognised to prevent errors.

Based on widely accepted standards for medical gas identification:

  • Oxygen (O<sub>2</sub>) is typically associated with a specific colour for its pipelines and connections.
  • The hose pipe used for an oxygen line needs to have a colour that clearly indicates its purpose.

The standard colour code for hose pipes designated for oxygen lines is Black. This colour helps differentiate oxygen lines from those carrying other gases like air, nitrous oxide, or carbon dioxide, each of which has its own specific colour code.

Importance of Gas Colour Coding

Proper colour coding of gas lines and equipment is a fundamental safety measure. It helps prevent:

  • Accidental connection of a device requiring one gas to a supply of a different gas.
  • Administration of the wrong gas to a patient in a medical setting.
  • Using incompatible materials or equipment with certain gases.

Always verify the gas type using labels and markings in addition to the colour code for maximum safety.

Revision Table: Common Medical Gas Colour Codes

Medical Gas Colour Code (Pipeline/Hose) Cylinder Body Colour (Typical) Cylinder Shoulder Colour (Typical)
Oxygen (O<sub>2</sub>) Black White White
Medical Air White Grey Black & White Quarters
Nitrous Oxide (N<sub>2</sub>O) Blue Blue Blue
Carbon Dioxide (CO<sub>2</sub>) Grey Grey Grey
Helium (He) Brown Brown Brown
Heliox (He/O<sub>2</sub>) Brown & Black Brown & White Brown & White

Additional Information on Medical Gas Safety Standards

Medical gas systems and equipment are governed by strict standards (e.g., ISO 7396 series, national pharmacopoeias, regional standards like HTM 02-01 in the UK, or NFPA 99 in the USA). These standards cover various aspects including:

  • Pipeline design and installation
  • Pressure regulation
  • Outlet and inlet connections (often non-interchangeable Diamond Probe, DISS, or other specific connectors for different gases)
  • Testing and maintenance
  • Labelling and documentation

Understanding and adhering to these standards, including the correct colour coding for oxygen lines and other gases, is essential for ensuring patient safety and operational efficiency in healthcare facilities. Regular training and awareness of staff handling medical gases are also critical components of a robust safety protocol.

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