# 1/8 inch Sch 40 pipe dimensions & weight > 1/8" Sch 40 pipe (DN 6): OD 10.3 mm, wall 1.73 mm, ID 6.84 mm, weight 0.37 kg/m, water capacity and approximate pressure rating. Source: https://pipingsupplyjournal.com/1-8-inch-schedule-40-pipe.html Publisher: Piping Supply Journal (Piping Supply Journal Editorial Team) · Published 2026-11-03 · Updated 2026-11-04 1/8 inch Sch 40 pipe (DN 6) — dimensions, weight and capacity per ASME B36.10M. Nominal size| 1/8" (DN 6) ---|--- Schedule| Sch 40 Outside diameter| 10.3 mm (0.406 in) Wall thickness| 1.73 mm (0.068 in) Inside diameter| 6.84 mm (0.269 in) Weight — carbon steel| 0.37 kg/m · 0.25 lb/ft Weight — SS 304 / SS 316| 0.37 / 0.38 kg/m 6 m length (CS)| 2.2 kg 20 ft length (CS)| 2.3 kg Flow area| 0.37 cm² Water capacity| 0.037 L/m Outer surface (painting)| 0.0324 m²/m Approx. max. working pressure*| 459 bar (6,662 psi) — A106 Gr B *Approximate ASME B31.3 straight-pipe rating at ≤ 38 °C for seamless A106 Gr B (S = 137.9 MPa, E = 1, 12.5% mill tolerance, no corrosion allowance). Use the [wall thickness calculator](https://pipingsupplyjournal.com/pipe-wall-thickness-calculator.html) for your own design conditions. Other schedules for 1/8": [Sch 10S](https://pipingsupplyjournal.com/1-8-inch-schedule-10s-pipe.html) · [Sch 80](https://pipingsupplyjournal.com/1-8-inch-schedule-80-pipe.html) · [all 1/8" schedules](https://pipingsupplyjournal.com/1-8-inch-pipe-dimensions.html) ## Frequently asked questions What is the ID of 1/8 inch Sch 40 pipe? 6.84 mm (0.269 in), with OD 10.3 mm and wall 1.73 mm. What is the weight of 1/8 inch Sch 40 pipe? 0.37 kg/m (0.25 lb/ft) in carbon steel; 2.2 kg per 6 m length. What pressure can 1/8 inch Sch 40 pipe take? Roughly 459 bar at ambient for seamless A106 Gr B under ASME B31.3 with no corrosion allowance; actual rating depends on material, temperature and code. --- Data is for reference; verify against the current edition of the governing standard. Quotations: https://pipingsupplyjournal.com/get-quote.html