STEEL TUBE AND PIPE HANDBOOK - February 2012

14 Steel tubes for building – Hollow structural sections (HSS) EN DIN NFA STN ČSN GOST Stan- Dimensions dards 10210-2 2448 49-501 42 5715 42 5716 8732 Dimensional standards Table 1/Page 26 Hot finished circular hollow sections (HFCHS) Dimensional range • ±1 % • min ±0,5 mm • max ±10 mm • ovality 2 % • weight ±6 %, max 8 % • ±1 % • min ±0,5 mm • weight –8 % +12 % Tolerance D • –10 % –12,5 % for seamless profiles • + tolerance is limited by al- lowed weight D < 130 mm • T ≤ 2Tn –10 % +15 % • 2Tn < T < 4Tn –10 % +12,5 % • T > 4Tn ±9 % Tn - basic wall thickness accord- ing to DIN 2448 D = 130–320 mm • T ≤ 0,05D –12,5% +17,5% • T > 0,05–0,11D ±12,5% • T > 0,11D ± 10% • D < 101,6 mm –12,5 % +15 % • D = 101,6–406,4 mm –12,5 % +17,5 % Informative values: • D < 60,3 mm 5–6 m • D ≥ 60,3 mm /T < 7,1 mm 5–6 m or 10–14 m • D ≥ 60,3 mm / T ≥ 7,1 mm 5–6 m Kinds: • random • fixed ±500 mm • exact L < 6 m 0 +10 mm L > 6 m 0 + 15 mm • exact L > 12 m – tolerances upon agreement Allowed 0,002.L of whole length locally 3 mm/m • square cut ends • free from exces- sive burrs Seepage24-25 Seepage36-37 List of dimensional standards and technical delivery conditions standards EN10 025 Hot rolled products of structural steels. Part 1-6. EN 10 210-1,2 Hot finished structural hollow sections of non-alloy and fine grain structural steel. Part 1: TDC. Part 2: Tolerances, dimensions and sectional properties. See also ISO 630-2 (TDC) and ISO 657-14 (DS). EN10266 Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for use in product standards. DIN1629 Seamless circular tubes of non-alloy steel with special quality requirements.TDC. DIN 2448 Plain end seamless steel tubes. Dimensions. DIN 17100 Steel for general structural purposes. Quality standard. DIN 17121 Seamless structural steel circular tubes for structural engineering purposes. DIN 17124 Seamless circular tubes of fine grain steel for engineering purposes. NFA 49-501 Steel tubes. Seamless or welded hot finished structural hollow sections. Dimensions. TDC. STN 42 0250 ČSN 42 0250 Hot formed seamless tubes from steel class 10 to 16. TDC. STN 42 5715 ČSN 42 5715 Hot formed seamless steel tubes. Dimensions. STN 42 5716 ČSN 42 5716 Hot formed seamless steel tubes with smaller tolerances. Dimensions. GOST 8731 Seamless hot-formed steel pipes. TDC. GOST 8732 Seamless hot-formed steel pipes. Dimensions. JIS G3444 Carbon steel tubes for general structural purposes. Tolerance T Lengths Straightness Tube ends Notes: •C–carbonequivalentformula:CEV(IIW)=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15. • steel are weldable, specific conditions see individual standards. • rate cold workability isset by mechanical steel properties and is definite with regulations. • tubes according to ASTM A500 (steel Grade A, B, C, D), ASTM A501 and JIS G3444 (steel STR290, STK400, STK540) upon agreement. • possibility of hot dip zinc coating of tubes is necessary to discuss at inquiry (see page 15).