## Pipe Diameter Tape Measures Are Made For All Users

The United States never did switch over to the metric system, as it was planned in the 1960’s and 1970’s. Yes, metric went over like a lead balloon. Americans are happy with inches, feet, gallons, and yards. The centimeter, liter and meter were mostly rejected. Both systems are used today in 2021 in labeling food products and liquids, but we Americans have learned to skim over those parts of the label that don’t fit into our familiar system.

The scientific community is firmly based on the MKS and CGS systems (meter, kilogram, second) and (centimeter, gram, second). The biggest part of the world is metric-based also.

Fortunately, pipe diameter tape measures are made for both systems, separately, and there is even one that is made with the inch and metric system together. The front side of the tape is in diameter inches (up to 38). The back side is in diameter millimeters (up to 955). This is a rare tool, but some companies need both measurements to satisfy their requirements.

## These Diameter Tape Measures Can Help You Be a Pi Wizard Today

Even if you’re not a mathematician, I think it’s safe to say that most people know the symbol .

But do you remember what it actually represents? Here’s a quick math lesson: It’s the ratio of a circle’s circumference (the distance around the circle) to its diameter (edge to edge, measuring through the center). Today is March 14th (3.14),  but most math nerds like to celebrate it as #PiDay!

Did you also know..

•  is constant for any circle, any size
• Continues to infinity
• In 1706 William Shaw, a Welsh mathematician, introduced the  symbol.
• In 2010 a Japanese engineer and an American computer scientist broke the record for most digits calculated past the decimal: 5 trillion!
• If you need to calculate the diameter of a tree trunk, pipe, or anything cylindrical, you will need a diameter tape measure. Just use it to measure the circumference, and it will calculate the diameter for you!

## What Is A Diameter Tape Measure?

Good question, because most people don’t have any use for one. A diameter tape measure is a measuring tape whose scale is stretched out by a factor of pi. This allows you to wrap it around a round object, such as a pipeline or tree trunk, and read its diameter directly on the scale. You don’t need to divide by 3.14159.

Here are some other names that people call these tapes:

• pi tapes
• circumference tapes (a misnomer)
• pipe tapes
• Lufkin pi tapes
• OD tapes
• outside diameter tapes
• pi-Cobra tapes
• pie tapes