Pipe, Pipe Size 4 In, Length 36 In, Unthreaded Connection, WOG (PSI) 150 At 72 Deg F, Saturated Steam Pressure 150 PSI, Material of Construction Black Welded Steel, Schedule 40, Inside Dia 4.026 In, Outside Dia 4.500 In, Wall Thickness 0.237 In, Standards ASTM A-53-A / API-5LA