BS 3381:1989 - Specification for spiral wound gaskets for steel flanges to BS 1560
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BS 3381:1989, titled "Specification for spiral wound gaskets for steel flanges to BS 1560," outlines the materials, dimensions, marking, and packaging requirements for spiral wound gaskets used with flat face and raised face steel flanges conforming to BS 1560-3.1. This standard applies to Class designations 150, 300, 600, 900, and 1500 for nominal sizes up to and including 24 inches, and for Class designation 2500 up to and including nominal size 12 inches.