Pressure testing equipment calibration is important in ensuring that you collect accurate and reliable data through your work. While different devices and systems will require different calibration techniques, all calibration depends on either a primary or secondary (otherwise known as “transfer”) standard. But what, exactly, is the difference between primary vs secondary standards?
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Harwood Engineering has supplied pressurizing equipment for autofrettage service since its inception in 1948. Generally, the requirement has been for the autofrettage of large steel forgings. Recently, however, we have developed a system for the pressure testing and autofrettage of small parts, such as diesel nozzles and manifolds for diesel engines.