www.phcppros.com/articles/18053-astm-a53-grade-a-type-e-schedule-40-erw-black-steel-pipe

ASTM A53 Grade A Type E Schedule 40 ERW black steel pipe
September 1, 2023
Fayette Pipe, a division of Specialty Conduit, manufactures high-quality American-made ASTM A53
Grade A Type E Schedule 40 ERW black steel pipe for fire sprinkler, HVAC, and other low-pressure plumbing applications. NPS 1/2” to 2” diameter in plain end, threaded, threaded both ends, coupled, and 10’ threaded on both ends. Lengths up to 21’. UL listed/FM approved. MIC Defense clear corrosion inhibitor is applied to the inner wall. Delivery anywhere in the continental U.S.