Pipeline marking tape

Pipeline identification uses colors and labels to indicate the type of fluid and its hazard level. Although colors can vary by industry and region. For example, according to the ASME standard, flammable fluids are often orange, water is green, and toxic or corrosive fluids may be yellow or orange with black lettering. Labels should be placed at regular intervals and in alternating directions for clear visibility.

Common pipe colors according to the standard:

Pipeline marking with tapes.

Pipelines are marked with rings of the primary color, and rings of the secondary color are painted on top of them

DN is a commonly used specification unit in European systems, which also identifies specifications for pipes, valves, flanges, fittings and pumps, such as DN250. DN stands for the nominal diameter of the pipe (also known as the nominal diameter). Note that this is not the outer or inner diameter, but the average of the outer and inner diameters, called the average inner diameter.

Inches (") are the most commonly used specification units in the American system, such as steel pipes, valves, flanges, elbows, pumps, tees.

In Dutch, the inch (abbreviated as in.) originally meant a thumb, and one inch is the length of a thumb. Of course, the length of a human thumb also varies. In the 14th century, Emperor Edward II issued the "Standard Legal Inches". It is regulated that the three largest grains selected from the middle of a barley ear and arranged in a row are one inch long.

Usually 1" = 2.54 cm = 25.4 mm

Ø is a universal unit that indicates the size of the outer diameter of materials such as pipes and/or elbows, round steel, etc. It can also be said to be the diameter, e.g. Ø 609.6 mm means an outer diameter of 609.6 mm.