What is the outside diameter of 1/2 inch pipe?

21.3 mm (0.840 in), in any schedule: it is the DN 15 pipe of ASME B36.10M. The wall changes with the schedule, and the inside diameter with it.

What is the wall thickness of 1/2 inch schedule 40 pipe?

2.77 mm (0.109 in), with an inside diameter of 15.76 mm (0.622 in); carbon steel pipe weighs 1.27 kg/m (0.85 lb/ft).

What is the difference between schedule 40 and 80 in 1/2 inch pipe?

The wall: 2.77 mm (0.109 in) in schedule 40 and 3.73 mm (0.147 in) in 80. The outside diameter is the same, so schedule 80 has the smaller bore -- 13.84 mm (0.546 in) against 15.76 mm (0.622 in) -- and weighs 1.62 kg/m (1.09 lb/ft) against 1.27 kg/m (0.85 lb/ft).

1/2 inch pipe (DN 15): outside diameter, wall thickness and weight by schedule

A 1/2 inch pipe (DN 15) has a 21.3 mm (0.840 in) outside diameter in every schedule: what changes is the wall, and with it the inside diameter and the weight. Designations that give the same wall share a row.

Schedule	Wall	ID	Weight
Sch 5 / 5S	1.65 mm (0.065 in)	18.00 mm (0.710 in)	0.80 kg/m (0.54 lb/ft)
Sch 10 / 10S	2.11 mm (0.083 in)	17.08 mm (0.674 in)	1.00 kg/m (0.67 lb/ft)
Sch 30	2.41 mm (0.095 in)	16.48 mm (0.650 in)	1.12 kg/m (0.76 lb/ft)
Sch 40 / STD / 40S	2.77 mm (0.109 in)	15.76 mm (0.622 in)	1.27 kg/m (0.85 lb/ft)
Sch 80 / XS / 80S	3.73 mm (0.147 in)	13.84 mm (0.546 in)	1.62 kg/m (1.09 lb/ft)
Sch 160	4.78 mm (0.188 in)	11.74 mm (0.464 in)	1.95 kg/m (1.31 lb/ft)
XXS	7.47 mm (0.294 in)	6.36 mm (0.252 in)	2.55 kg/m (1.72 lb/ft)

Plain-end weight of carbon steel pipe, by the standard's own formula: 10.69 × (D − t) × t in lb/ft, with D and t in inches (0.0246615 × (D − t) × t in kg/m, in mm). Austenitic stainless weighs about 2% more.

Lay out on 1/2 inch pipe

The outside diameter and the wall of the chosen schedule go to the calculator, which opens with them filled in and draws without an account.

Schedule Pipe saddle (90° tee) 90° lobster back bend

Questions

What is the outside diameter of 1/2 inch pipe?: 21.3 mm (0.840 in), in any schedule: it is the DN 15 pipe of ASME B36.10M. The wall changes with the schedule, and the inside diameter with it.
What is the wall thickness of 1/2 inch schedule 40 pipe?: 2.77 mm (0.109 in), with an inside diameter of 15.76 mm (0.622 in); carbon steel pipe weighs 1.27 kg/m (0.85 lb/ft).
What is the difference between schedule 40 and 80 in 1/2 inch pipe?: The wall: 2.77 mm (0.109 in) in schedule 40 and 3.73 mm (0.147 in) in 80. The outside diameter is the same, so schedule 80 has the smaller bore -- 13.84 mm (0.546 in) against 15.76 mm (0.622 in) -- and weighs 1.62 kg/m (1.09 lb/ft) against 1.27 kg/m (0.85 lb/ft).

1/2 inch pipe (DN 15): outside diameter, wall thickness and weight by schedule

Lay out on 1/2 inch pipe

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