UL 331:2017 pdf download – Strainers for Flammable Fluids and Anhydrous Ammonia

UL 331:2017 pdf download – Strainers for Flammable Fluids and Anhydrous Ammonia. 8.5 A flat gasket employed with a bolted cover shall be cemented to the cover or body unless the construction is such that the gasket will be retained...