Today is International “World Standards Day”. We salute the experts around the world to take on the tasks of standardizing our calendars, clocks, volume measurements, and even Diameter tape measures. They provide for the efficient manufacturing and functioning of our planet. The metric system of CGS (centimeter, gram, second) and MKS (meter, kilogram, second) is the one used by all scientists and the residents of most countries. The Imperial system (inch, pound, second) is used in America, along with the metric system. Many of the packages in America use both systems.
Diameter tape measures are still made for each system, out of necessity. So, there are “2 standards”. Although most users prefer the metric system, a few Americans prefer the inch system. Even the “inch” diameter tape has 2 alternatives.
Diameter in 100ths of an inch. This one is used more than the next one. It’s also easier to read, without having to convert to a fraction system. This one is strictly decimal. This makes the results easier to use in your other computations.
Diameter in 64ths of an inch. This tape reads how many 64th of an inch the diameter is, if not precisely an even inch. You have to figure in your head that 48 64ths is really 3/4. And 56 64ths is really 7/8.
The 3rd full week in September was “National Construction Appreciation Week” in the USA. It’s not a very old week. It was instigated in 2018 by “I Build America”, which was started in 2016. Mike Rydin, the CEO of HCSS came up with the idea to call attention to all the people who help build this great country. I’m sure many of them have used pipe diameter tape measures in their work. Plumbers and electricians are the most likely tradesmen that use them. Without a doubt, Lufkin makes the best diameter tapes.
Most of the pocket diameter tapes are 6 feet long. But the length isn’t really what they are all about. They are not designed to measure length. They measure diameter by wrapping them around the pipe circumference. See answer 4 for a more specific answer.
These tools make it easy for you. You wrap them around the pipe and read off the diameter.
These are pocket tapes. Their size makes them convenient, but they are not traceable to the NBS.
They can measure up to 23 inch diameter pipes. Some go as high as 38 inches in diameter.
Production time is about 3 weeks after you approve a proof.
Vector art is the best for this process. That means an eps or ai file are recommended. If you have other types of art, we can convert them.
The inch ones are calibrated to 100ths of an inch, 64ths of an inch, or to one millimeter.
Pi-Cobra tapes are made in China. The Lufkin ones are currently made in Mexico. All are imprinted in the USA.
Why do you need to choose a diameter tape, anyway? Because you want a quick and easy way to take a tape measure out of your pocket and find the diameter of a pipe or other round object. The best pipe diameter tape measure for your job can be solved by asking these questions:
Metric or inch, or both? Some tapes are marked in any of these 3 different scales.
Does a brand name matter? Lufkin tools have made a name for themselves. Pi-Cobra tapes are made in China, but they are less expensive, and longer.
What accuracy do you need? The pocket sized ones are quick and convenient. They are accurate to 0.01 inch. If you need a highly accurate one, check out Pi Tape. They cost about 10 times as much, and they can’t fit in your pocket. But here is their accuracy: Pi Tape metric tapes have a diameter accuracy of ± 0,03 mm up to 3 600 millimeters. Pi Tape inch tapes have a diameter accuracy of ± 0,001″ up to 144 inches.
PI Tape 24″ to 48″ Range Periphery Tape Measure ‑ 57‑065‑856
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.
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!
Lufkin and Pi-Cobra are the two main brands of diameter tape measures that we carry. If you’re a regular user of these unique and useful tape measures, you know their special skill: measuring the diameter of pipes or other cylindrical items.
I bet this week is going to be a doozie, so I think I might just unplug the TV and not read the news online either. I need a detox from all of the social and political unrest that is consuming the news headlines daily.