In this video, you will learn about What is the difference between 2.2 and 3.1 Material test certificates? The main difference between the 2.2 and 3.1 material certificates lies in the level of verification and confidence they offer.

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Learn About Pipes Used in Oil and Gas
https://hardhatengineer.com/pipe-class-piping-specifications-pipeend/
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https://hardhatengineer.com/pipe-class-piping-specifications-pipeend/pipe-manufacturing-process/
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https://hardhatengineer.com/pipe-fittings/pipe-fittings-manufacturing-process/
https://hardhatengineer.com/pipe-fittings/pipe-fitting-dimensions-material/
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https://hardhatengineer.com/orifice-long-weld-neck-flange/

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