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Is there a provision that exempts hydrauliic accumulators from Code that have a pressure rating up to 210-bar & greater than 6in, as 10-inch in dia?

I was just informed the Democratic House members introduced a bill that would require OSHA to issue an interim dust rule within 90 days and a final rule within 18 months and revise its hazard communication standard to warn workers of the dangers associated with combustible dust. Isn't this...

I've researched everything I can find to no avail concerning deltaP related to the effect of a weather cover on a vertical relief line. I think at one point in the past I had seen an estimation based of % free flow height (above pipe exit) as related to diameter. Does anyone have a reference...

This complete revision has changed from a guide to now a "Standard" and provides mandatory requirements.

Does anyone have resistance information on reducing and increasing elbow K-factors. I need to determine the resistance in a 4" to 6" and a 8" to 10" increaser in steam service.