Pipeline Flow Markers

Pipeline Flow Markers by Caledonia Signs - Trade Only Supplier

Pipeline flow markers are critical safety and identification tools used in industrial, commercial, and utility environments to clearly indicate the contents, direction of flow, and sometimes pressure or temperature of substances moving through pipelines. These markers help ensure that maintenance personnel, contractors, and emergency responders can quickly and accurately identify what a pipeline carries—such as water, gas, steam, oil, or chemicals—and how it flows through a system.

The primary function of pipeline flow markers is to enhance workplace safety. By clearly labelling pipes, these markers reduce the risk of accidental exposure, incorrect connections, or hazardous leaks. In emergency situations, being able to rapidly identify a pipeline’s contents and flow direction can make a significant difference in managing the incident safely and effectively.

In addition to improving safety, flow markers contribute to regulatory compliance. Many industries, especially those involving hazardous materials, are required to follow standards such as ANSI/ASME A13.1 or ISO 20560, which dictate the design and placement of pipeline identification. Using compliant markers demonstrates a commitment to best practices and can protect businesses from fines, legal liabilities, or operational delays.

Finally, pipeline flow markers also support efficient maintenance and operations. Clear labelling helps teams navigate complex pipe networks with confidence, making it easier to isolate sections for repair, conduct inspections, or perform upgrades without disrupting unrelated systems. In this way, pipeline flow markers not only protect people but also optimize processes and improve the overall safety and functionality of facilities.


Nitrogen - Flow Marker (Pack of 5)

Nitrogen - Flow Marker (Pack of 5) Safety Signs

Nitrogen – Flow Markers are used to clearly indicate the flow direction or presence of nitrogen gas within a piping or tubing system. These markers help workers and technicians quickly identify nitrogen lines, ensuring proper handling and maintenance, and reducing the risk of mistakes that could lea..

Gas - Flow Marker (Pack of 5)

Gas - Flow Marker (Pack of 5) Safety Signs

Gas – Flow Markers are used to clearly indicate the direction and type of gas flowing through pipes and tubing in industrial, commercial, or laboratory settings. These markers provide vital visual information to operators, maintenance personnel, and safety teams, ensuring correct handling and preven..

Natural Gas - Flow Marker (Pack of 5)

Natural Gas - Flow Marker (Pack of 5) Safety Signs

Natural Gas – Flow Markers are important because they provide clear, immediate identification of the flow direction of natural gas within pipelines and equipment. Natural gas is highly flammable and potentially explosive, so knowing exactly which way it’s flowing is critical for safe operation, main..

Propane - Flow Marker (Pack of 5)

Propane - Flow Marker (Pack of 5) Safety Signs

Propane – Flow Marker labels are used to clearly indicate the direction and presence of propane gas flow within piping systems. These markers help ensure that anyone working on or around propane lines can quickly identify the flow path, which is essential for safe operation, maintenance, and emergen..

Methane - Flow Marker (Pack of 5)

Methane - Flow Marker (Pack of 5) Safety Signs

Methane – Flow Markers are critically important because they clearly indicate the direction of methane gas flow within pipelines and systems. Methane is a highly flammable and explosive gas, so knowing its flow path is essential for safe operation, maintenance, and emergency response. Accurate ident..

Co2 - Flow Marker (Pack of 5)

Co2 - Flow Marker (Pack of 5) Safety Signs

Clearly show the direction of carbon dioxide gas flow within pipes and systems, which is crucial for safe handling and operation. Although CO₂ is non-flammable, it can pose serious risks such as asphyxiation or pressure-related hazards if not properly managed. Knowing the flow direction helps preven..

Cold Water - Flow Marker (Pack of 5)

Cold Water - Flow Marker (Pack of 5) Safety Signs

Cold Water Flow Markers are used to clearly indicate the direction and presence of cold water flow within plumbing and piping systems. These markers help plumbers, maintenance personnel, and operators quickly identify cold water lines, ensuring proper handling, repairs, and system management. The p..

Waste Water - Flow Marker (Pack of 5)

Waste Water - Flow Marker (Pack of 5) Safety Signs

Clearly indicate the direction and path of wastewater flow within plumbing and drainage systems. Proper identification of wastewater flow is crucial for maintenance, troubleshooting, and ensuring the system functions correctly without contamination or backflow issues. These markers help maintenance..

Cooling Water - Flow Marker (Pack of 5)

Cooling Water - Flow Marker (Pack of 5) Safety Signs

Cooling Water – Flow Markers are used to clearly indicate the direction and presence of cooling water flow within industrial, commercial, or HVAC piping systems. These markers help operators, maintenance personnel, and engineers quickly identify cooling water lines, ensuring proper system operation ..

Condensate - Flow Marker (Pack of 5)

Condensate - Flow Marker (Pack of 5) Safety Signs

Condensate – Flow Markers are used to clearly indicate the direction and flow of condensate—water formed from the condensation of steam or humid air—within piping systems. These markers help maintenance personnel, engineers, and operators quickly identify condensate lines, ensuring proper handling a..

Drinking Water - Flow Marker (Pack of 5)

Drinking Water - Flow Marker (Pack of 5) Safety Signs

Drinking Water – Flow Markers are used to clearly identify the direction and presence of potable (safe-to-drink) water within plumbing and distribution systems. These markers help maintenance teams, plumbers, and facility managers quickly distinguish drinking water lines from other types of water sy..

Hot Water - Flow Marker (Pack of 5)

Hot Water - Flow Marker (Pack of 5) Safety Signs

Hot Water – Flow Markers are important because they clearly indicate the direction and presence of hot water flow within plumbing and heating systems. Proper identification helps prevent accidental burns, incorrect repairs, and system malfunctions by ensuring that maintenance personnel and users kno..

Heating - Flow Marker (Pack of 5)

Heating - Flow Marker (Pack of 5) Safety Signs

Clearly indicate the direction and presence of heating fluid flow within heating systems, such as central heating or hydronic (water-based) heating networks. These markers help technicians, maintenance personnel, and operators quickly identify the flow path, ensuring proper system operation and safe..

Fresh Water - Flow Marker (Pack of 5)

Fresh Water - Flow Marker (Pack of 5) Safety Signs

Fresh Water – Flow Markers are important because they clearly identify the flow direction of fresh, potable water within plumbing and distribution systems. This helps prevent confusion with other water types such as recycled, grey, or wastewater, which is critical for maintaining water quality and s..

Non Drinking Water - Flow Marker (Pack of 5)

Non Drinking Water - Flow Marker (Pack of 5) Safety Signs

Non Drinking Water – Flow Markers are important because they clearly identify pipes and systems carrying water that is not safe for human consumption. This distinction is crucial to prevent accidental use or contamination of potable water supplies, protecting public health and ensuring compliance wi..

Steam - Flow Marker (Pack of 5)

Steam - Flow Marker (Pack of 5) Safety Signs

Essential for clearly indicating the direction and presence of steam flow within piping and equipment systems. Steam systems operate under high pressure and temperature, so accurately identifying flow direction is critical for safe operation, maintenance, and troubleshooting. Using steam flow marke..

Electricity - Flow Marker (Pack of 5)

Electricity - Flow Marker (Pack of 5) Safety Signs

Electricity – Flow Markers are important because they visually indicate the direction of electrical current or power flow within electrical systems and equipment. This information is crucial for engineers, electricians, and maintenance personnel to safely manage, troubleshoot, and repair electrical ..

Nitric Acid - Flow Marker (Pack of 5)

Nitric Acid - Flow Marker (Pack of 5) Safety Signs

Nitric Acid – Flow Markers are important because they clearly indicate the direction and presence of nitric acid flow within piping systems. Nitric acid is a highly corrosive and hazardous chemical, so proper identification of its flow is crucial for safe handling, maintenance, and emergency respons..

Sulphuric Acid - Flow Marker (Pack of 5)

Sulphuric Acid - Flow Marker (Pack of 5) Safety Signs

Sulphuric Acid – Flow Markers are essential for clearly indicating the direction and presence of sulphuric acid flow within piping systems. Sulphuric acid is a highly corrosive and dangerous chemical, so proper identification of its flow path is critical to ensure safe handling, maintenance, and eme..

Caustic Soda - Flow Marker (Pack of 5)

Caustic Soda - Flow Marker (Pack of 5) Safety Signs

Caustic Soda – Flow Markers are crucial for clearly indicating the direction and flow of caustic soda (sodium hydroxide) within piping systems. Caustic soda is a highly corrosive chemical commonly used in industrial processes, so accurately identifying its flow path is essential for safe handling an..

Hydrochloric Acid - Flow Marker (Pack of 5)

Hydrochloric Acid - Flow Marker (Pack of 5) Safety Signs

Hydrochloric Acid – Flow Markers are important because hydrochloric acid is a highly corrosive and hazardous chemical, and clearly indicating its flow direction is essential for safe handling, maintenance, and emergency response. Proper labeling helps prevent accidental exposure, improper valve oper..

Sodium Hydroxide - Flow Marker (Pack of 5)

Sodium Hydroxide - Flow Marker (Pack of 5) Safety Signs

Sodium Hydroxide – Flow Markers are important because sodium hydroxide, also known as caustic soda, is a highly corrosive chemical widely used in industrial processes. Clearly marking the flow direction of sodium hydroxide helps ensure safe handling, maintenance, and emergency response by preventing..

Hydrogen Peroxide - Flow Marker (Pack of 5)

Hydrogen Peroxide - Flow Marker (Pack of 5) Safety Signs

Hydrogen Peroxide – Flow Markers are important because hydrogen peroxide is a strong oxidiser used in various industrial, medical, and cleaning applications, and it can be hazardous if not handled properly. Clear indication of the flow direction in piping systems helps ensure safe operation, mainten..

Oil - Flow Marker (Pack of 5)

Oil - Flow Marker (Pack of 5) Safety Signs

Oil – Flow Markers are important because they clearly indicate the direction and presence of oil flow within pipelines and equipment. Proper identification helps operators, maintenance teams, and safety personnel manage oil systems safely and efficiently, preventing costly errors and environmental h..

Heating Oil - Flow Marker (Pack of 5)

Heating Oil - Flow Marker (Pack of 5) Safety Signs

Heating Oil – Flow Markers are important because they clearly indicate the direction of heating oil flow within fuel supply systems. Proper identification helps ensure safe and efficient operation, maintenance, and troubleshooting of heating oil delivery, preventing costly mistakes or hazards. Thes..

Fuel Oil - Flow Marker (Pack of 5)

Fuel Oil - Flow Marker (Pack of 5) Safety Signs

Fuel Oil – Flow Markers are essential for clearly indicating the direction and presence of fuel oil flow within piping and equipment systems. Fuel oil is commonly used in heating, power generation, and industrial processes, so proper flow identification is critical to ensure safe handling and effici..

Diesel Oil - Flow Marker (Pack of 5)

Diesel Oil - Flow Marker (Pack of 5) Safety Signs

Diesel Oil – Flow Markers are important because they clearly indicate the direction of diesel fuel flow within pipelines and fuel systems. Proper identification helps operators and maintenance personnel manage diesel supply safely and efficiently, preventing mistakes that could lead to equipment dam..

Air - Flow Marker (Pack of 5)

Air - Flow Marker (Pack of 5) Safety Signs

Air – Flow Markers are important because they clearly indicate the direction of airflow within compressed air or ventilation systems. Proper identification helps maintenance teams, engineers, and operators manage airflow safely and efficiently, preventing errors that could affect system performance ..

Compressed Air - Flow Marker (Pack of 5)

Compressed Air - Flow Marker (Pack of 5) Safety Signs

Compressed Air – Flow Markers are crucial for clearly indicating the direction of compressed air flow within piping and pneumatic systems. Correct identification helps operators and maintenance personnel manage and service these systems safely and efficiently, preventing costly mistakes or equipment..

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Signage Solutions: Avian Influenza & Animal Disease Control

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Take action! New signage to help prevent the spread of bird flu outbreaks across the UK With a growing number of reports relating to avian influenza outbreaks across the UK, biosecurity and disease prevention have become a growing concern for many businesses - particularly those in the farming, agriculture, and park / recreation industries. Although transmission to humans is currently low and primarily involves people in frequent contact with birds and poultry, it is important to be aware of the risks and to take the necessary precautions to minimise those risks. Inside is a range of signs and products which can help educate, inform and advise, and to encourage best practice in terms of hygiene and safety. Avian Influenza primarily affects birds, however some strains can infect other animals, including domestic pets such as cats and dogs, especially if they come into contact with infected birds or contaminated environments. Exposure to environments contaminated wit...>>> READ MORE >>>

Stress Awareness Month

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Stress Awareness Month: Leading with Love and Support With Stress Awareness Month fast approaching, now is the perfect time to remind our distributors of the wide range of health and wellbeing posters we offer. These resources are designed to reduce stigma and encourage healthier lifestyles and workplaces. Whether you’re in the fire and security industry or a PPE supplier, Caledonia believes that fostering inclusion and understanding in staff rooms, site offices, or waiting areas is crucial. These spaces can become catalysts for important conversations, inspiring both staff and the public to take simple steps to improve their well-being. Stress in the UK: A Growing Concern Stress is a significant issue across the UK, with 74% of people reporting that stress has made them feel overwhelmed and unable to cope (YouGov, 2018 for the Mental Health Foundation). Stress Awareness Month is a time to acknowledge the profound impact stress can have on our lives and, just as imp...>>> READ MORE >>>