A number of options are specified in this Part of EN 10305 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
1) Specification of a steel grade not specified in this Part of EN 10305;
2) specification of a sulphur range to support machinability
3) surface condition for further processing ;
4) measurement of surface roughness ;
5) lower surface roughness
6) defined removable substances on surface
7) non-destructive testing for the detection of longitudinal imperfections
8) non-destructive testing for verification of leak-tightness
9) agreement on a cross section other than circular
10) tubes specified by outside or inside diameter and wall thickness
11) reduced diameter tolerances
12) diameter tolerances unilateral
13) reduced concentricity
14) reduced wall thickness tolerance
15) wall thickness tolerance unilateral
16) agreement on a tolerance for exact lengths £ 500 mm or > 8 000 mm
17) specified end finishing
18) specific inspection ;
19) inspection certificates 3.1.A or 3.1.C ;
20) flattening or drift expanding test;
21) test unit with tubes from one cast only
22) alternative marking ;
23) delivery without corrosion protection
24) specified corrosion protection
25) specified method of packaging
