Steel Tube Handbook - 2018

48 Stan- dards Dimensions Dimensional standards Dimensional range Tolerance D Tolerance T Lengths Straightness Tube ends SEAMLESS TUBES EN 10216-2 Table 5/Page 40 * Heat exchangers tubes are supplied as cold drawn in preference (Table 16 at page 51) DIN 28180 (2391-1) Table 16/Page51 Tolerance class TK1: D = 16–30 mm ±0,08 mm D > 38 mm ±0,15 mm Tolerance class TK3: D = 16–38 mm ±0,50 mm T ≤ 2 mm ±0,2 mm T > 2 mm ±10 % T ≤ 2 mm ±0,2 mm T > 2 mm –10 % +15 % Exact lengths: L ≤ 5 m 0 +5 mm L 5–10 m 0 +10 mm L > 10 m upon agreement (seamless max. 18,3 m) • visually straight • upon agreement • square cut ends • free from excessive burrs BS 3606 Table 23/Page 68 D ≤ 25 mm ±0,10 mm D = 25–38 mm ±0,15 mm D 38–50 mm ±0,20 mm • ±10 % • upon agreement: D ≤ 38 mm 0 +20 % D > 38 mm 0 +22 % Exact lengths: L ≤ 6 m 0 +3 mm L > 6 m +1,5 mm/m, max +12,5 mm visually straight Smaller tolerances are possible after agreement NF A 49-215 Table 23/Page 68 See page 36 UNI ISO 1129 Table 23/Page 68 See page 28 STN ČSN 42 6710 42 6711 Table 23/Page 68 See page 28 GOST 8734 (8732) Table 23/Page 68 Cold finished: D = 5–10 mm ±0,15 mm D = 10–30 mm ±0,30 mm D = 30–50 mm ±0,40 mm D > 50 mm ±0,8 % T ≤ 1 mm ±0,12 mm T = 1–5 mm ±10 % • random • exact 0 +10 mm D = 5–8 mm 3 mm/m D= 8–10mm 2mm/m D > 10 m 1,5 mm/m 1,5 mm/m • square cut ends • free from excessive burrs • non -uprightness2° • beveled for T > 5 mm 1060 D ≤ 29 mm ±0,2 mm D = 29–51 mm ±0,30 mm D > 51 mm –0,8% + 0,6% • Class 1 –10 % +8 % • Class 2 ±8 % ASTM ASME A179 SA-179 Table 14/Page 51 According to ASTM A450 See table10/page 47 See table11/page 47 • upon agreement • max 20,0 m • square cut ends • free from excessive burrs JIS G3461 Table 12/Page 47 See page 30 See page 30 • square cut ends • free from excessive burrs G3462 Steel heat exchangers tubes 1. Delivery of tubes according to other standards for seamless tubes 2. See also standards for pressure equippment (pages 23–25, 32–33, 35, 39) 3. See also standards for low temperature tubes acc. to ASTM and ASME (page 39) 4. For low temperatures tubes according to STN, ČSN 42 0165 (page 48) 5. ISO 6759 Seamless steel tubes for heat exchangers 6. Tubular exchanger manufacturers association (TEMA) issues standards for exchanger construction, that refer to tube standards List of dimensional standards and technical delivery conditions standards EN 10216-2 Seamless steel tubes for pressure purposes. TDC. Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties. DIN 1629 Seamless circular tubes of non-alloy steel with special quality requirements. TDC. DIN 2391-1 Seamless precision steel tubes. Part 1: Dimensions. DIN 17175 Seamless steel tubes for elevated temperatures. TDC. DIN 28180 Seamless steel tubes for tubular heat exchangers. Dimensions, tolerances, materials. BS 3606 Steel tubes for heat exchangers.