Copper units of pressure Wikipedia

OverviewMethodologyComparing unitsCUP and LUP pressures vs. transducer pressuresExternal links

Copper units of pressure or CUP, and the related lead units of pressure or LUP, are terms applied to pressure measurements used in the field of internal ballistics for the estimation of chamber pressures in firearms. These terms were adopted by convention to indicate that the pressure values were measured by copper crusher and lead crusher gauges respectively. In recent years, they have been replaced by the adoption of more modern piezoelectricpressure gauges that mor

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Metallic Cartridge Chamber Pressure Measurement

To this day, most published chamber pressure (MAP) data for metallic cartridges is taken by the copper crusher method of measurement. The proper name for this type of measurement is CUP, or Copper Units of Pressure. Another, similar, method uses lead crusher pellets and the resulting pressure values are called "Lead Units of Pressure," or LUP.

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Copper Unit of Pressure (CUP) Defined by Hodgdon « Daily

Apr 18, 2015· A: Copper Unit of Pressure (CUP) is a measurement used in the ammunition industry to determine the chamber pressure created by a cartridge load. Originally, a precisely formed copper slug was placed in a fixture over the chamber. When the cartridge was fired, the amount of crushing measured on the slug allowed engineers to determine the pressure.

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Gun chamber pressure is an important parameter in proofing of ammunition to ensure safety and reliability. It can be measured using copper crushers or piezoelectric sensor. Pressure calculations in copper crusher method are based on linear plastic deformation of copper after firing. However, crusher pressure deformation at high pressures deviates from the

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Correlating PSI and CUP Recreational Software Inc.

well correlated to each other. So if the copper crusher system is well correlated with peak chamber pressure, and the piezoelectric PSI system is well correlated with peak chamber pressure, then CUP must be well correlated with piezoelectric PSI. It cannot be otherwise. All measurement systems lie, at least a little bit.

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Pressure Signs Shooters Forum

Aug 29, 2009· Speer 14 describes the calibration of pressure guns on page 58 and provides a simplified description of how the copper crusher pressure gun is “calibrated.” It will shake anyone’s faith in the reliability of the copper crusher method of pressure testing.

Sporting Arms and Ammunition Manufacturers' Institute

Pressure Measurement Differences. For sporting arms centerfire cartridges there are three principal pressure measurement protocols, conformal piezoelectric transducer (SAAMI), drilled case piezoelectric transducer (C.I.P.), and copper crusher (SAAMI & C.I.P.). It should be noted, the copper crusher is in limited use due to the increased

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Cartridge Pressure Standards

Because the indicated pressure from crushers is known to be off, SAAMI many decades ago began referring to the indicated pressure from their tests as "Copper Units of Pressure," a clumsy name commonly shortened to "CUP." For low pressure cartridges such as shotshells, lead is used for the crusher, and SAAMI refers to these numbers as "LUP."

Sporting Arms and Ammunition Manufacturers' Institute

Pressure Measurement Differences. For sporting arms centerfire cartridges there are three principal pressure measurement protocols, conformal piezoelectric transducer (SAAMI), drilled case piezoelectric transducer (C.I.P.), and copper crusher (SAAMI & C.I.P.). It should be noted, the copper crusher is in limited use due to the increased

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223/5.56 loading data Shooters Forum

Nov 02, 2014· SAAMI says .223 Remington is limited to 52,000 CUP or 55,000 psi maximum average pressure (MAP) for copper crusher or conformal Piezo transducer, respectively. NATO puts the 5.56 at 3800 bar, or 55,114 psi by copper crusher, and 4300 bar, or 62,366 psi MAP by their type of Piezo transducer.

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Piezo (PSI) and strain gauge (PSI) are not directly relatable to copper crusher (CUP) due to the differences in the sensitivity of the copper crusher versus the other methods used to measure the pressure. However, new statistical data analysis suggests that for most cartridges ANSI/SAAMI Maximum Average Piezo (PSI) and Maximum Average copper crusher (CUP)

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CUP vs. PSI — What’s The Difference in Pressure Measurements

Oct 13, 2014· CUP vs. PSI — What’s The Difference in Pressure Measurements and the older Copper Units of Pressure (CUP) version can both be found in the PDF pamphlet. Image by ModernArms, Creative Common License. The other fact, which I think is the main problem, is that the deformation of the crusher gauge is a record of the total force on the

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Copper sensor type piston piston piston conic al piston conic al piston conic al piston Sensor dimensions, mm 3х4,5 4х6,5 5х8,1 6х9,8 8х13 8х13 CONSIST OF: Crusher gauge, crushers set. DISTINCTIVE FEATURES ♦ A unique pressure control device during mass tests. ♦ Simple in use. ♦ Barrel integrity is not spoiled.

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Copper & Copper Alloy Fittings Standards. Copper & Copper Alloy Tube and Pipe Download the entire white paper in PDF [67 kb] Cast Bronze Threaded Fittings: Classes 125 and 250. Cast bronze threaded fittings in class 125 and class 250 shall be manufactured to the requirements of ANSI/ASME B16.15 Cast Bronze Threaded Fittings.

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Copper sensor type piston piston piston conic al piston conic al piston conic al piston Sensor dimensions, mm 3х4,5 4х6,5 5х8,1 6х9,8 8х13 8х13 CONSIST OF: Crusher gauge, crushers set. DISTINCTIVE FEATURES ♦ A unique pressure control device during mass tests. ♦

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1. Introduction Hindawi Publishing Corporation

In normal pressure proof barrels, barrel has one drilled hole for chamber pressure measurement (either for copper crusher or for piezo transducer), whereas, in this study, a comparison of pressures measured by copper crusher as well as piezo is done at the same location using same barrel keeping all other parameters constant.

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[PDF] Nonlinear Material Behavior Analysis under High

Gun chamber pressure is an important parameter in proofing of ammunition to ensure safety and reliability. It can be measured using copper crushers or piezoelectric sensor. Pressure calculations in copper crusher method are based on linear plastic deformation of copper after firing. However, crusher pressure deformation at high pressures deviates from the corresponding values measured by