BS 10305-2:2016 pdf download – Steel tubes for precision applications — Technical delivery conditions Part 2: Welded cold drawn tubes 5 Classification and designation 5.1 Classification In accordance with the classification system in EN 10020 the steel grades given in Table 2 are non-alloy quality steels. 5.2 Designation For the tubes covered by this document the steel designation consists of the number of this document (EN 10305-2) plus either: a) the steel name in accordance with EN 10027-1; or b) the steel number in accordance with EN 10027-2. 6 Information to be supplied by the purchaser 6.1 Mandatory information The following information shall be obtained by the manufacturer at the time of enquiry and order: a) quantity (mass or total length or number); b) term “tube”; c) dimensions (see 8.5); d) steel designation (see 5.2); e) delivery condition (see 7.2.2); f) type of tube length and, where applicable, the length (see 8.5.2); g) type of inspection document (see 9.1). 6.2 Options A number of options are specified in this document and these are listed below. In the event that the purchaser does not indicate a wish to implement any of these options at the time of enquiry and order,the tubes shall be supplied in accordance with the basic specification (see 6.1). • Option 1: specification of a steel grade not specified in this document (see 8.2); • Option 3: suitability for hot-dip galvanizing (see 8.2); • Option 4: surface condition for further processing (see 8.4.1); • Option 8: measurement of surface roughness (see 8.4.3); • Option 9: specific surface roughness (see 8.4.3); • Option 10: tube surfaces free from not easily removable substances (see 8.4.6); • Option 12: non-destructive testing for the detection of longitudinal imperfections (see 8.4.7); • Option 13: non-destructive testing for verification of leak-tightness (see 8.4.7); • Option 15: specification of a cross section other than circular (see 8.5.1.1); • Option 16: reduced diameter tolerances (see 8.5.1.2); • Option 17: unilateral diameter tolerances (see 8.5.1.2); • Option 18: reduced eccentricity (see 8.5.1.3); • Option 19: reduced wall thickness tolerance (see 8.5.1.4); • Option 20: unilateral wall thickness tolerance (see 8.5.1.4); • Option 22: reduced maximum deviation from straightness (see 8.5.3); • Option 23: specified end finishing (see 8.5.4); • Option 25: flattening or drift expanding test for delivery condition +A or +N (see Table 8); • Option 26: test unit with tubes from one cast only (see...
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