The colours of the flags and what they mean

For the sake of uniformity and clarity, APWA encourages all participating companies to use uniform color codes as specified in the ANSI Z535.1 standard. That way, anyone would immediately know what type of utility line was underground.

 

Red flags represent power lines, pipes, or lighting cables. They help to prevent excavators from coming into contact with these live lines, as this could create an electric shock hazard and loss of power in the area.

 

Yellow flags indicate pipelines containing gaseous materials such as natural gas, oil, steam and oil. When these pipes are accidentally hit, they can cause a gas leak or possibly an explosion.

 

Orange flags symbolize communication lines, alarm or signal lines, or fiber optic cables. These lines are responsible for Internet, telephone and television access in the area.

 

Blue flags symbolize drinking water, while purple flags represent mud, irrigation or reclaimed water. There are also green flags for sewers and drainage. If any of these utility lines were hit, they would likely flood the area, causing flooding or even releasing toxins.

 

In addition to identifying utility lines, some flag colors are used to mark other things. For example, white marker flags are placed around the boundary of the proposed excavation site. In addition, the surveyors used pink flags as temporary measurement markers for reference.

 

How to use the flag

 

Before placing flags, excavators need to know the location of all buried utility lines and the full extent of those lines. They should take into account the type of utility line identified, the topography of the area and the excavation to be carried out.

 

It is easy to insert a marker flag into the ground. With your hand, just push one end of the stick into the ground. However, some types of flagstaff require an insertion tool to secure the flag to the ground.

 

 

There are different ways to flag utility lines. A utility line, in particular, can be marked in two ways. A professional may place the flag approximately in the center of the utility line. They can also plant flags at either end of utility lines. For conduits or pipes, flags may be placed on the outer ends or edges of these utilities.

 

When marking multiple utility lines of the same type, the professional may place the marking flag in the center of the utility line. Their flags shall indicate the width and number of these utilities.

 

In some cases, several similar utility lines are tied together in a single ditch or corridor. The number of lines in this public service arrangement is often difficult to determine. In this case, the professional can place his flag approximately in the center of the utility. The flags should also indicate the width of the ditches where utilities intersect.

 

For areas to be excavated, white flags are used to delimit boundaries. They can mark the four corners of the area, mark the central point of the radius of the area, or outline the boundaries of the excavation project.

 

Choose the right flag

 

Logo flag

 

Since the marking flag is to be used outdoors, it must be designed for outdoor use. The challenge of outdoor environments is that weather and site conditions are quite unpredictable. That's why the flag should be durable enough to withstand harsh conditions and long periods of standing outdoors.

 

Not only should the flagpole be made of heavy material, but the flag should also be securely attached to the flagpole. A good way to ensure this is to check that the flag is wrapped around the staff, rather than just glued to it. Under this structure, strong winds and rain would not be able to separate the flag from its pole.

 

 

 

Another thing to consider when choosing a flag is its visibility. Their staffs should be long enough to raise the flag to a visible height. Flags, on the other hand, should be bold enough to stand out from a long distance in any lighting conditions.

 

 

Finally, excavators and other construction professionals should always have plenty of flags ready. That way, when they are faced with several utility lines that need to be marked, they will be ready.

 

As an authorized distributor, Engineer Warehouse selects only the best branded products to meet the specific needs of professionals. That's why we only offer the highest quality tagged flags. These flags are sure to stand up to the harshest field conditions. They come in different sizes and a variety of highly visible, long-lasting colors. They are also equipped with a variety of staff to suit the needs of the workplace. Plus, they're sold by the piece or in bundles of 100, so you can easily stock up on supplies for your next project.

 

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