Youngstown Tube manufactures Schedule 40 pipe in sizes 1" thru 2" using only high quality domestic steel. This ensures a uniform superior product for threading, roll grooving, welding or plain end uses. Youngstown Tube's schedule 40 pipe is produced under ASTM A135/A795 Type E, Grade A, NH standards. Every piece is Eddy-Current tested and conforms to internal SPC testing and recording. Youngstown Tube Schedule 40 steel sprinkler pipe is coated with a black enamel coating, continuous color coded red stencil, and stored indoors ready for immediate shipment.