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Ask The Expert Answers: NAFS

What is the difference between Design Pressure, Performance Grade, and Structural Test Pressure

The terms "Design Pressure", "DP," "Performance Grade," "PG," and "Structural Test Pressure," "STP" have in the past been loosely used by some in the field.  This answer will clarify what the differences are between them.

Tags: AAMA, design pressure, NAFS, performance grade, structural test pressure

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