رقم Steel tubes, fittings and structural hollow sections. Symbols and definitions of terms for use in product standards

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1 مواصفة قياسية عربية م.ق.ع المواصفة القياسية العربية الموحدة رقم أنابيب النحاس ذات المقطع الداي ري-الا بعاد بالنظام المتري Steel tubes, fittings and structural hollow sections Symbols and definitions of terms for use in product standards المنظمة العربية للتنمية الصناعية والتعدين مرآز المواصفات والمقاييس

2 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN August 2003 ICS ; ; English version Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for use in product standards Tubes en acier, accessoires et profils creux en acier pour la construction - Symboles et définitions des termes à utiliser dans les normes de produits Stahlrohre, Fittings und Hohlprofile für den Stahlbau - Symbole und Definition von Begriffen für die Verwendung in Erzeugnisnormen This European Standard was approved by CEN on 27 June CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10266:2003 E

3 Contents Foreword Scope Definitions of terms to be used in product standards Symbols for use in product standards General symbols Additional symbols for structural hollow sections Additional symbols for testing Additional symbols for tubular fittings... 9 Bibliography

4 Foreword This document (EN 10266:2003) has been prepared by Technical Committee ECISS/TC 29, "steel tubes and fittings for steel tubes", the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2004, and conflicting national standards shall be withdrawn at the latest by February This European Standard is derived from ISO 3545 Steel tubes and fittings - Symbols for use in specifications. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. 3

5 1 Scope This European Standard gives the symbols and definitions of terms for use in product standards for steel tubes, fittings and steel structural hollow sections. NOTE For definitions of terms non specific to tubular products, see other relevant standards e.g. EN ISO 9000 [1]. 2 Definitions of terms to be used in product standards 2.1 tube hollow long product open at both ends, of any cross sectional shape 2.2 structural hollow section tube intended to be used for construction purposes 2.3 fitting component for attaching to a tube for joining tubes together or for changing the direction or bore of a tube 2.4 seamless tube (S) tube made by piercing a solid product to obtain a tube hollow, which is further processed, either hot or cold, into its final dimensions 2.5 welded tube (W) tube made by forming a hollow profile from a flat product and welding adjacent edges together. After welding the tube may be further processed, either hot or cold, into its final dimensions 2.6 butt welded tube (BW) (also known as continuous weld tube or Fretz Moon tube) tube made by a continuous process in which decoiled strip, welded end to end, is passed through a furnace, formed into a hollow profile and the seam weld made by further raising of the temperature of the adjacent edges (e.g. using a jet of oxygen), and pressing the edges together 2.7 electric welded tube (EW) tube made by pressure welding, in a continuous or non continuous process, in which strip is formed cold into a hollow profile and the seam weld made by heating the adjacent edges through the resistance to the passage of high or low frequency current, and pressing the edges together. The electric current may be applied either by direct electrode contact or by induction. 2.8 high frequency welded tube (HFW) tube made by pressure welding, in a continuous or non continuous process, in which strip is formed cold into a hollow profile and the seam weld made by heating the adjacent edges through the resistance to the passage of a high frequency current, and pressing the edges together. The electric current may be applied either by direct electrode contact or by induction. 4

6 2.9 submerged arc welded tube (SAW) tube made by forming either hot or cold a hollow profile from strip or plate and welding the adjacent edges together, without pressure, by addition of filler metal. The adjacent edges and the filler metal are heated to welding temperature by an arc generated by the resistance to the passage of an electric current. The arc generated and the molten metal are protected from atmospheric contamination by the presence of a layer of flux. The tubes may have one or two longitudinal seam welds (SAWL) or one helical seam weld (SAWH) with at least one pass on the inside of the tube and at least one pass on the outside of the tube combination welded tube (COW) tube made by forming either hot or cold a hollow profile from strip or plate and welding the adjacent edges together, without pressure, by addition of filler metal. The first pass is made by a continuous gas metal arc welding process followed by automatic submerged arc welding with at least one pass on the inside of the tube and at least one pass on the outside of the tube. The tube may have one or two longitudinal seam welds (COWL) or one helical seam weld (COWH) jointer two pieces of tube connected together by a circumferential weld (to obtain the required delivery length) 2.12 strip end weld weld that joins strip ends together 2.13 random length delivery length where the length and tolerance of individual tubes are not defined. However a length range may be agreed approximate length delivery length, specified by the purchaser, with a unilateral or a bilateral tolerance as specified in the product standard 2.15 standard length delivery length, with a unilateral or a bilateral tolerance as specified in the product standard 2.16 exact length delivery length, specified by the purchaser, with a restricted unilateral tolerance as specified in the product standard 2.17 manufacturer organization that manufactures products in accordance with the relevant standard(s) and declares the compliance of the delivered products with all applicable provisions of the relevant standard(s) 2.18 agreement contractual arrangement between manufacturer and purchaser at the time of enquiry and order 5

7 3 Symbols for use in product standards 3.1 General symbols Symbol Unit Definition A cm 2 Cross sectional area of the product B mm Specified length of the side of square tube of hollow section or the length of the shorter side or a rectangular tube or hollow section (see Figure 2) CC - Concentricity CC = T max T min T max T min D mm Specified outside diameter (see Figure 1) D max D min mm Maximum and minimum outside diameter of a circular tube or hollow section measured in the same plane (see Figure 1) d mm Inside diameter (see Figure 1) H mm Specified length of the longer side of a rectangular tube or hollow section (see Figure 2) L mm Tube or piece length M kg/m Mass per unit length O % Out of roundness O = 100 x (D max - D min )/D T mm Specified wall thickness T max T min mm Maximum and minimum wall thickness of a circular tube or hollow section measured in the same plane (see Figure 1) 6

8 3.2 Additional symbols for structural hollow sections Symbol Unit Definition C 1 /C 2 mm Length of corner region of a square or rectangular hollow section (see Figure 2) C t cm 3 Torsional modulus constant e mm Deviation from straightness (see Figure 3) I cm 4 Second moment of area 4 Torsional inertia constant (polar moment of inertia in the case of circular hollow I t cm section only) I Y cm 4 Second moment of area about the y axis (see Figure 4) I Z cm 4 Second moment of area about the z axis (see Figure 4) i mm Radius of gyration i I / A i Y mm Radius of gyration about y axis iy IY / A i Z mm Radius of gyration about x axis iz IZ / A R mm External corner radius of a square or rectangular hollow section (see Figure 2) V mm Total measured twist (see Figure 3) V 1 mm Twist measured at one end of a section W el cm 3 Elastic section modulus W ely cm 3 Elastic section modulus about the y axis W ely = I /(H/2) W elz cm 3 Elastic section modulus about the z axis W elz = I /(B/2) W pl cm 3 Plastic section modulus W ply cm 3 Plastic section modulus about the y axis W plz cm 3 Plastic section modulus about the z axis x mm Concavity (x 1 ), or convexity (x 2 ) (see Figure 3) (degree) Angle between adjacent faces of square or rectangular hollow section (see Figure 3) 7

9 3.3 Additional symbols for testing Symbol Unit Definition Pressure test p bar test pressure S MPa stress used to calculate the test pressure Flattening test (see Figure 5) c constant factor of deformation in the formula (1 + c) x T H = c + (T/D) H mm distance between platens of the test machine Drift expanding test (see Figure 6) C mm maximum outside diameter of the expanded test piece (degree) angle of the mandrel Ring expanding test (see Figure 7) C mm maximum outside diameter of the expanded test piece D m max mm maximum diameter of mandrel D m min mm minimum diameter of mandrel k mm length of the tapered part of the mandrel Flanging test (see Figure 8) C mm maximum outside diameter of the expanded test piece r mm corner radius of the flanging tool (degree) angle of the mandrel Tube bending test r mm radius at the bottom of the groove of the bending former (degree) angle of the bend 8

10 3.4 Additional symbols for tubular fittings Symbol Unit Definition B mm Distance from the back to the face or to the start of the straight end for return bends (see Figure 12) D mm Major outside diameter (see Figures 9 and 10) D 1 mm Minor outside diameter (see Figures 9 and 10) d mm Major inside diameter see Figures 9 and 10) d 1 mm Minor inside diameter (see Figures 9 and 10) F mm Distance from the face to the centre for equal tees or from the face to the axis for 90 elbows( see Figures 10 and 12) G mm Distance from the face of the branch to the centre for reducing tees (see Figure 10) H mm Distance from the face to the centre for 45 elbows (see Figure 12) K mm Total height for caps (see Figure 11) L mm Distance from the face to face for reducers (see Figure 9) L 1 mm Length of straight end for elbows and return bends (see Figure 12) P-Q-U mm Tolerance on the form of the fitting (misalignment, squareness, ) (see Figure 13) R mm Value of the bending radius at the neutral fibre for elbows or return bends (see Figure 12) T mm Thickness on the major diameter (see Figures 9 and 10) T 1 mm Thickness on the minor diameter (see Figures 9 and 10) 9

11 a) Dimensions b) Out of roundness c) Concentricity Figure 1 - Circular tube or hollow sections Figure 2 - Square and rectangular hollow sections Dimensions 10

12 a) Twist b) Convexity/concavity c) Deviation from straightness d) Out of squareness Figure 3 - Tolerance on hollow sections a) Circular b) Non circular Figure 4 - Axes of hollow sections 11

13 Figure 5 - Flattening test Figure 6 - Drift expanding test 12

14 Figure 7 - Ring expanding test Figure 8 - Flanging test 13

15 a) Concentric b) Eccentric Figure 9 - Concentric and eccentric reducers a) Equal b) Reducing Figure 10 - Tees, equal and reducing 14

16 Figure 11 - Caps Figure 12 - Bends 15

17 Figure 13 - Tolerances on the form of bends and tees 16

18 Bibliography EN ISO 9000, Quality management systems - Fundamentals and vocabulary (ISO 9000:2000) 17

English version. Steel and steel products Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997)

English version. Steel and steel products Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 377 July 1997 ICS 77.040.10; 77.140.01 Descriptors: See ISO document English version Steel and steel products Location and preparation of samples