Sometimes your tank volume is a concern, the tank might just come with a basic strapping chart. This chart tells you what volume you have at what levels so drawing a gallon per inch relationship. For example, at 10 inches, you may have 50 gallons, and at 18.5 inches, you might have 100 gallons.

Also strapping charts are called calibration tables. Non-linear tanks need strapping charts to identify volumes because it cannot be calculated with simple equations. These tanks are sometimes calibrated either by the manufacturer or a professional service to ensure an accurate volume can be calculated at important intervals.

At Pullmax we offer certified calibration (strapping) services for non-linear tanks. Our team has inspected and calibrated over 1000 tanks in the past 4 years.