Piping

Micrometer

Optical comparator

1

2

3

4

M e a s u r e m e n t G a u g e

SponsoredLinks

Concentric Circles Have the SameCenter; Left Circles Are Concentric

Instructions toCalculate Concentricity

What Is a Total Runout?

Other People Are Reading

In geometry, concentricity is the quality of imbeddedcircles having the same center. In industry, concentricityis a measure of constancy of tube or pipe wall thickness.Such constancy is desirable for different reasons indifferent situations. Evenness of wall thickness isdesirable for integrity if pressure will be applied to the tubing. If the tubing needs to bespun, variation in wall thickness can cause shimmy.

The formula for calculating concentricity is simple. The difficult part is making sure thesurvey of the varying thickness of the piping wall is comprehensive enough.

Things You'll Need

InstructionsFind the thickest and thinnest points of wall tubing thickness.

For example, in the diagram, the dotted lines mark the crosssections of thinnest and thickest wall. If need be, these points can

done by trial and error, using a micrometer. If you know how to use one, try doingso with an optical comparator.

Measure the thickness at these points. The measurement can be taken with amicrometer.

SponsoredLinks

SeguroDeAutoAXAObtn Descuento + 12 Meses Sin Intereses En Tu Seguro De Auto

axa.com.mx

Use the following formula in the diagram to calculate theconcentricity: C = Wmin/Wmax --- 100%.

Wmin is the minimum width. Wmax is the maximum width. C is apercent. 100% means the tubing is fully concentric.

Compare C from Step 3 with any quality control tolerance that was pre-determined. Do this to decide if the level of concentricity is sufficient.

For example, suppose that the tolerance is 70%. Concentricity is not allowed to gobelow this tolerance. Suppose that Wmin is 0.25 mm and Wmax is 0.30 mm. ThenC = 83%, the tolerance is met, and the tube is deemed sufficiently concentric.

Related Searches

Calculate Calculator

Wall Thickness Gauge

Pipe Flow Measurement

Schedule 40 Steel Pipe

Carbon Steel Pipe Prices

You May Like

How to Calculate Roundness

How to Calculate Circularity

How to Calculate TruePosition

How to Measure a Micron

How to Measure a Gauge ofMetal Tubing

Fundamentals of GeometricDimensioning & Tolerancing

How to Convert ACSM to PDF

eHow Hobbies, Games & Toys Science & Nature Science How to Calculate Concentricity

Search

Mom Style Food Tech Home Money Crafts ExpertsMore3

Pin Share Tweet Stumble Share

How to Calculate ConcentricityBy Paul Dohrman, eHow Contributor

VV

V

READ ARTICLE

How to Paint a CheckerboardGame Table

4 5

Log InSign Up

Semi-Automatic Mutli-Diameter

Measurement for Food Can Ends

www.cmc-kuhnke.com/foodcans

M e m o s e n s s a v e s y o u r m o n e yCalculate your cost savings online

for pH measurement

www.products.endress.com/memosens

M e a s u r e m e n t T o o l sTop Deals at Factory Price.

Contact Directly & Get Live Quotes!

www.alibaba.com

Q C I C M M S t y l iCMM Styli

Made in Korea

www.qci.co.kr

How to Calculate 0.03 Percentof Carbon DioxideConcentration in mg/L

How to Concentrate onWorking Out

How to Do a ConcentricMerger

Still Have a Question? Ask the eHow Community!

Related SearchesCalculate Calculator

Wall Thickness Gauge

Pipe Flow Measurement

Schedule 40 Steel Pipe

Carbon Steel Pipe Prices

ReferencesFormula for Concentricity

More Formula Information for Concentricity

Definition of Concentricity

ResourcesDefinition of Concentricity in Semiconductor Technology

Photo Credit Author

More Like This

Comments

How to Properly IntroduceYourself at a Job Interview

Community

Ask Your Question 250

Featured

Facebooksocialplugin

AlsopostonFacebook PostingasNestorLopezCastillo Comment

Addacomment...

You May Also Like

Instructions to Calculate ConcentricityCalculating concentricity is essential to determine the constancy of thickness in atube or pipe wall, which, if inconsistent, will cause a...

VIEW BLOG POST

DIY Side Table and MagazineRack

READ ARTICLE

Turn a China Hutch Into aHome Office CommandCenter

VIEW BLOG POST

Bring a Spa Feel to YourBathroom with a DIY BathCaddy

1999-2015 Demand Media, Inc.

About eHow

eHow UK

eHow en Espaol

eHow Brasil

eHow Deutschland

Contact Us

eHow Blog

How to by Topic

How to Videos

Terms of Use

Privacy Policy

Report Copyright

en-US

Connect with us:

Ad Choices

5