Why ASME B16.6 Remains a Cornerstone in Pipe Fitting Standards After nearly two decades working hands-on with industrial piping systems, I can say this: standards aren’t just red tape. Take ASME B16.6—it’s one of those quietly crucial specs many engineers know by heart. It focuses on cast iron butt welding fittings, which may sound niche but are fundamental in ensuring consistent, leak-proof joints in pipelines that run everything from water treatment to heavy chemicals. Oddly enough, while many specs cover welded flanges or carbon steel fittings, B16.6 holds its ground because it clearly defi…