Stainless sanitary tube (ASTM A270) OD sizes: 1/2 to 12 in OD, 18 / 16 / 14 / 12 gauge walls, ID and weight + 100 mm sections for tri-clamp ferrule work — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/stainless-sanitary-tube-astm-a270-od-sizes/ (sheet CC BY 4.0) Basis: Wayland Industries' A270 sheet and Ace Stainless Supply's submittal (two distributors) with Engineering ToolBox's A270 table as a third; weights are the distributors' printed values Catalog version: 2026-10-20 Overall (mm): length 203.2, width 203.2, height 100.0 - Sanitary (dairy, brewing, food, pharma) stainless tube is sized by outside diameter in inches, so a 2 in tri-clamp ferrule is welded to 2.000 in OD tube; the OD equals the tube-stub OD of the ferrules on sanitary-clamp-caps-ferrules-spools and tri-clamp-ferrule (12.7, 19.05, 25.4, 38.1, 50.8, 63.5, 76.2, 101.6 mm). ASTM A270 is the sanitary tubing specification (seamless and welded; Wayland's sheet is for polished A270 tubing). ASTM A269 is the general-service austenitic stainless tubing specification; no A269 size table was read, so it is not tabulated here. - Walls are by gauge: 18 ga 0.049 in, 16 ga 0.065 in, 14 ga 0.083 in, 12 ga 0.109 in. Wayland and Ace list the same wall for every size they share: 16 ga from 1/2 (Wayland) / 1 (Ace) to 3 in, 14 ga for 4 in, 12 ga for 6 and 8 in; Engineering ToolBox lists one wall per size and agrees with Wayland at every size it lists (1/2 to 4 in, 6 in, 8 in); it has no 5, 10 or 12 in. 18 ga (0.049 in) is listed by Ace for 1/2, 3/4 and 1 in only; Wayland lists 5 in at 14 ga (0.083 in), Ace has no 5 in, and 10 and 12 in at 12 ga are Wayland only. Note that 6 in is 12 gauge (0.109 in) in all three sources, not 14 gauge. - Weight per foot is as printed (Wayland, Ace in lb/ft; Engineering ToolBox in kg/m); every Wayland and Ace weight equals 10.78 × (OD − wall) × wall lb/ft, the formula Ace prints for 300-series stainless, to within 2 % (Wayland rounds to two decimals; checked here). Wayland also prints a wall tolerance of ±10 % on all sizes. Working and burst pressures printed by Wayland are not copied. Polished-finish figures are a finish note, not a dimension. - ID = OD − 2 × wall (derived, in mm). Example: 1-1/2 in OD, 16 ga: 38.10 − 3.30 = 34.80 mm, the bore of the 1-1/2 in ferrule on the clamp-fittings pages. Metric tube to DIN 11850 / ISO 1127 has different ODs (29, 35, 41, 53 ...): stainless-tube-din-11850-en-10357-iso-1127. - Files: 100 mm hollow sections, one per (OD, wall) that at least two of the three sources list. 18 ga walls (Ace only) and the 5, 10, 12 in sizes (Wayland only) are in the table without a file. The length is Xem's example length. OD, in OD, in (decimal) OD, mm gauge wall, in wall, mm ID, mm (derived) Wayland lb/ft Ace lb/ft Eng. ToolBox kg/m sources listing this size 1/2 0.500 12.70 16 0.065 1.65 9.40 0.3 — 0.454 2 1/2 0.500 12.70 18 0.049 1.24 10.21 — 0.2365 — 1 3/4 0.750 19.05 16 0.065 1.65 15.75 0.48 — 0.717 2 3/4 0.750 19.05 18 0.049 1.24 16.56 — 0.367 — 1 1 1.000 25.40 16 0.065 1.65 22.10 0.66 0.649 0.976 3 1 1.000 25.40 18 0.049 1.24 22.91 — 0.498 — 1 1-1/2 1.500 38.10 16 0.065 1.65 34.80 1 0.9962 1.5 3 2 2.000 50.80 16 0.065 1.65 47.50 1.35 1.343 2.02 3 2-1/2 2.500 63.50 16 0.065 1.65 60.20 1.7 1.69 2.54 3 3 3.000 76.20 16 0.065 1.65 72.90 2.05 2.037 3.06 3 4 4.000 101.60 14 0.083 2.11 97.38 3.5 3.4723 5.23 3 5 5.000 127.00 14 0.083 2.11 122.78 4.4 — — 1 6 6.000 152.40 12 0.109 2.77 146.86 6.92 6.923 10.32 3 8 8.000 203.20 12 0.109 2.77 197.66 9.27 9.3 — 2 10 10.000 254.00 12 0.109 2.77 248.46 11.62 — — 1 12 12.000 304.80 12 0.109 2.77 299.26 13.97 — — 1 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Wayland Industries: Polished ID/OD sanitary tubing ASTM A270 spec sheet (2020): OD, gauge, wall, tolerance, weight per foot — web — Distributor spec sheet; numbers only — https://getpipe.com/content/Wayland-Tubing-Spec-Sheet_2020.pdf - Ace Stainless Supply: Sanitary tube submittal: OD, gauge, wall, weight per foot (1/2 to 8 in) — web — Distributor submittal; numbers only — https://www.acestainless.com/images/pdf/Submittal/Tubes/sanitary-tube.pdf - Engineering ToolBox: ASTM A270 sanitary stainless steel tubing: OD, nominal wall, mass per metre (1/2 to 8 in) — web — Reference page; numbers only — https://www.engineeringtoolbox.com/ASTM-A270-sanitary-stainless-steel-tubing-d_2160.html Free files (CC BY 4.0, Xem Studio; STEP + STL, 10 parts): https://xemstudio.com/files/hardware/stainless-sanitary-tube-astm-a270-od-sizes/index.json API: https://xemstudio.com/api/geometry?object=stainless-sanitary-tube-astm-a270-od-sizes