BS EN ISO 13769:2018 pdf free

BS EN ISO 13769:2018 pdf free.Gas cylinders – Stamp marking
The stamp markings listed in Table 1 shall be applied legibly so that the integrity of the cylinder is unaffected, e.g. either on a reinforced part of the cylinder or on a permanent attachment. Hard metal stampings shall not be applied to the cylindrical part of the cylinder (unless applied by the manufacturer as part of the manufacturing process).
For refillable metal and composite cylinders, the stamp markings shall be applied permanently. Certain information (see Table 1) may be applied durably to the cylinder (e.g. by stencilling, labelling, using a ring).
For cylinders with a diameter less than 51 mm, the stamp marking may also be applied either permanently or durably with a fixed label or other suitable method on the cylindrical part. However, a hard metal stamping procedure shall not be used if it results in an unacceptable cycle and burst performance. The depth (when applicable) of the characters in the stamp marking applied by any method shall be such that they are legible and durable under all operating conditions.
The stamp marking tools used (when applicable) shall have such radii as are necessary to prevent the formation of sharp notches. The radius of the stamp marking tool should not be less than 0,2 mm.Different values may be used, but it shall be demonstrated by fatigue and burst tests in accordance with the design standard or equivalent that a failure does not initiate in the markings.
For welded cylinders, some stamp markings appear on a welded identity plate or on another part permanently attached to the cylinder and thus are not subject to gas pressure.
For composite cylinders, permanent markings can be achieved by use of a printed label encapsulated either by placing it under the resin or by covering it with a permanent transparent coating on the shoulder or the side wall of the cylinder (see 4.3).
Except for the “UN” mark, the characters in the stamp markings shall be at least 5 mm in height. This height may be reduced on cylinders with an outside diameter less than 140 mm except for small cylinders, whose requirements are shown in B.1.1. In no case shall the characters be less than 2,5 mm in height. The minimum size of the“UN” mark shall be 10 mm for cylinders with diameters greater than or equal to 140 mm and 5 mm for cylinders with diameters less than 140 mm.BS EN ISO 13769 pdf download.