Home Pipe Sizes Schedule 40

Schedule 40 Pipe Dimensions

Schedule 40 steel pipe dimensions reference for common NPS sizes, including OD, wall thickness, ID, and weight.

NPS	DN	OD	Wall	ID	Weight
NPS 2	50	2.375 in / 60.33 mm	0.154 in / 3.91 mm	2.067 in / 52.50 mm	3.66 lb/ft / 5.45 kg/m
NPS 3	80	3.5 in / 88.90 mm	0.216 in / 5.49 mm	3.068 in / 77.93 mm	7.58 lb/ft / 11.28 kg/m
NPS 4	100	4.5 in / 114.30 mm	0.237 in / 6.02 mm	4.026 in / 102.26 mm	10.8 lb/ft / 16.07 kg/m
NPS 6	150	6.625 in / 168.28 mm	0.28 in / 7.11 mm	6.065 in / 154.05 mm	18.99 lb/ft / 28.26 kg/m
NPS 8	200	8.625 in / 219.07 mm	0.322 in / 8.18 mm	7.981 in / 202.72 mm	28.58 lb/ft / 42.53 kg/m
NPS 10	250	10.75 in / 273.05 mm	0.365 in / 9.27 mm	10.02 in / 254.51 mm	40.52 lb/ft / 60.30 kg/m
NPS 12	300	12.75 in / 323.85 mm	0.406 in / 10.31 mm	11.938 in / 303.23 mm	53.57 lb/ft / 79.72 kg/m

About Schedule 40

Schedule 40 identifies a standardized pipe wall thickness for a given nominal pipe size. The actual wall thickness depends on the NPS size.

Select an NPS size above to open the exact Schedule 40 dimensional reference page.

Schedule 40 is a standardized pipe wall-thickness designation used with nominal pipe size. The actual wall thickness varies by NPS.

No. The wall thickness changes with NPS size even when the schedule designation remains the same.