Steel Tube Handbook - 2018

80 Dimensions Dimensions are given in Table 35. Tolerances According to standards, special tolerances could by agreed on request. Lengths • exact lenghts 6 000 mm (tolerances - standard lengths 0+50 mm, exact lengths 0+10 mm) • on request other fixed lengths in the range 3 000 – 9 000 mm Straightness 3 mm/m, totally max 0,0015% of tube length. Tube ends Plain ends, plugged with plastic caps. Steel grade Steel is shown in the table of chemical composition and mechanical properties (see page 81). Delivery condition Normalized: .1 – STN, ČSN NBK - DIN +N – EN N – ASTM Roughness (D and d), d over 15 mmm, Ra ≤ 4 µm. Micropurity (data upon agreement) According to NFA 04-106 or ASTM E45 (ranking JK) max. A4 - B2 - C2 - D2. Also according to ISO 4967 or EN 10 247 upon agreement. A - sulphide, B - Aluminia, C- Silicate, D - Oxides, DS - Oxides) Grain size (data upon agreement) According to EN ISO 643 - 5 and finer. Testing Non specific inspection or specific inspection. In both cases leak tightness test will be carried out in accordance with EN 10246-1 (electromagnetic test). Other tests according to standards. Marking Each tube shall be marked with Ink-Jet system along whole tube length according to standard or customer’s specification. The bundle of tubes shall be marked with a label attached to the bundle. Surface protection • oiled • phosphated and oiled • outside surface of tube as chromating – upon agreement only - see page 81 Packaging Tubes are packed in round or hexagonal bundles of maximum 2000 kg each, fastened with steel strips. On request – paper below the stripes and plastic bags at the bundle ends. Certified test report According to DIN 50049 and EN 10204:2004 • non specific inspection - 2.2 • specific inspection - 3.1.B., according to EN 3.1 • upon agreement - 3.1.C., according to EN 2.2 (See also page 7) Pressure chart for hydraulic tubes – see tables 36 (A,B,C,D) page 84 - 87. (Calculation according to DIN 2413)