Steel Tube Handbook - 2018

28 Seamless boiler tubes for pressure equipments (high temperature) NFA 49-211 Steel tubes. Seamless plain-end unalloyed steel tubes for fluid piping at elevated temperatures. Dimensions. TDC. NFA 49-213 Steel tubes. Seamless unalloyed and Mo and Cr-Mo alloyed steel tubes for use at high tempera- tures. Dimensions (with standard tolerances). TDC. ISO 1129 Steel tubes for boilers, superheaters and heat exchangers. Dimensions, tolerances and weight per unit lengths. Standards Dimensions Dimensional standards Dimensional range Tolerance D Tolerance T Lengths Straightness Tube ends NF A 49-211 Table 5/Page 40 (Table25/Page 69) D ≤ 48,3 mm –0,8 +0,4 mm D = 60,3–114,3 mm ±0,8 mm D = 139,7–219,1 mm –0,8 +1,6 mm Tube weight –3,5 +10 % T ≤ 3,2 mm –0,15T +0,5 mm T = 3,2–20 mm –0,125T +0,15T Exact lengths tolerances:  • L ≤ 8 m 0 +10 mm • L > 8 m 0 +15 mm max. 3 mm/m total 0,15 % tube length • square cut ends tol. 0,5 %D (min. 0,5 mm, max. 1,6 mm) • beveled D > 60,3 49-213 Hot finished: D ≤ 63,5 mm ±0,50 mm D = 63,5–114,3 mm ±0,75 % D > 114,3 mm ±1 % Cold finished: D ≤ 33,7 mm ±0,25 mm D > 33,7 mm ±0,5 % min ±0,25 mm ±12,5 % min ±0,4 mm ±10 % Exact lengths tolerances:  • D ≤ 88,9 mm a L ≤ 7,5 m 0 +5 mm • D > 88,9 mm 0 +10 mm • L > 7,5 m +1 mm/1 m max. 3 mm/m total by length 6 m = 8 mm • square cut ends • free from excessive burrs UNI (ISO 1129) Pipelines 4991 Hot finished: D ≤ 51 mm ±0,5 mm D = 51–419 mm ±1 % Cold finished: D ≤ 139,7 mm ±0,75 % min ±0,3 mm Tube weight –8 +10% D ≤ 139,7 mm ±12,5 % ±10 % Exact lengths tolerances:  • L ≤ 6 m 0 +10 mm • L > 6 m 0 +15 mm • square cut ends • free from excessive burrs STN ČSN 42 5715 42 5716 (42 6710) (42 6711) 42 5715 D ≤ 219 mm ±1,25 % min ±0,5 mm D < 219 mm, T < 20 mm –15 % +12,5 % Exact lengths tolerances:  0 +15 mm Multiple: +5 mm na rez, max. +50 mm Straightened – 3mm/m Exact straightened 1,5 mm/m Marking: .+1 .+2 za RN • square cut ends • free from excessive burrs • option: with beveled ends 42 5716 D ≤ 219 mm ±1 % min ±0,5 mm D < 219 mm, T < 20 mm ±12,5 % 42 6710 ±1 % min ±0,4 mm T ≤ 3 mm –10 % +15 % T > 3 mm –10 % +12 % 42 6711 see precision tubes GOST 8732 TU 14-3-190 Table 6/Page 42 D ≤ 50 mm ±0,50 mm D = 50–219 mm usually ±1 % increased ±0,8 % D ≤ 219 mm, T ≤ 15 mm usually –15% +12,5% increased ±12,5% Exact lengths tolerances:  • L ≤ 6 m 0 +10 mm • L > 6 m 0 +15 mm 1,5 mm/m • square cut ends • option: beveled for T 5–20 mm TU 14-3P-55 usually D ≤ 50 mm ±0,40 mm 50<D ≤ 114 ± 1% 114<D ≤ 245 ± 1% usually -10% / + 12,5 % -10% / + 15,0 % -5% / + 20 % TU 14-3-460 usually D ≤ 108 mm ±1% min. 0,5 mm 114<D ≤ 245 ± 1% usually T<14 mm; -10% / +15% -5% /+20% PN-H 74252 D ≤ 50 mm ±0,50 mm D = 50–219 mm usually ±1 % increased ±0,8 % D ≤ 219 mm, T ≤ 15 mm usually –15% +12,5% increased ±12,5% Exact lengths tolerances:  • L ≤ 6 m 0 +10 mm • L > 6 m 0 +15 mm 1,5 mm/m • square cut ends • option: beveled for T 5–20 mm ANSI ASME B36.10 Table 7/Page 44 See table 8, page 45 Except 1. row tolerance ±0,4 (not –0,8 mm) Depending on tube dimension length upon agreement. See EN page 38 Visually straight • square cut ends • plain ends • NPS ≤ 11/2 (DN 40/48,3 mm) agreement • NPS ≥ 2 (DN 50/60,3 mm) T ≤ XS – beveled T > XS – plain and square cut List of dimensional standards and technical delivery conditions standards UNI 4991 Seamless and welded steel tubes with plain ends. Dimensions. UNI 5462 Seamless steel tubes - tubes for elevated temperatures and pressures. STN 42 0251 ČSN 42 0251 Seamless steel tubes with guaranteed properties of elevated temperatures. STN 42 5715 ČSN 42 5715 Hot formed seamless steel tubes. STN 42 5716 ČSN 42 5716 Hot formed seamless steel tubes with smaller tolerances.  HF production facilities to 12,7 m + 50 mm (30 mm), over 12,7 m + 100 mm