BS EN 14894:2021 pdf free download – LPG equipment and accessories一 Cylinder and drum marking.
Clause 5, Clause 6, Clause 7 and Clause 8 indicate which markings shall be “permanent (P)” and which can be “durable (D)”.
Markings which are permitted to be durable can be permanently applied if so desired.
5.2.2 For metallic cylinders, the markings shall be located on the shoulder, top end or neck of the cylinder or on a permanently affixed component, e.g. shroud, handle(s), foot ring, welded nameplate, etc.
5.2.3 If markings are applied after completion of manufacture or following periodic inspection, by stamping or engraving onto the pressure parts of the cylinder, it shall be demonstrated by fatigue and burst tests in accordance with the original design standard or equivalent, that failure does not initiate in the markings.
5.2.4 For composite cylinders, permanent markings can be affixed by different methods, e.g. by use of a printed label encapsulated by either placing it under the resin or by covering it with a permanent transparent coating, on the shoulder or the sidewall of the cylinder, or printed in plastic components permanent affixed to the cylinder in bottom or neck area (see 5.3).
5.2.5 The characters in the stamp markings shall be at least 5 mm in height. On cylinders with an outside diameter less than 140 mm, this height can be reduced, but in no case shall the characters be less than 2,5 mm in height.
5.2.6 The it-mark, where applicable, shall have substantially the same vertical dimension as the other stamp markings but shall not be less than 5 mm. If the mark dimensions are changed, the proportions of the drawing shall be maintained.
NOTE The proportions of the u-mark are specified in the conformity marking drawing in the TPED.
The permanent marking on LPG cylinders should be in 3 groups and displayed in one or more of the above positions depending on the design and size of the cylinder and the remaining space for markings.
9 Other stamp markings
Where applicable, the following markings shall be applied permanently or durably as indicated in Table 4.
The sequence of markings need not follow that of the table. Any such markings shall be located so as to avoid confusion with the markings listed in Clause 6, Clause 7 and Clause 8.
Enough space for additional stamp markings, if required by the distributor or the user, shall be provided (see 5.2.2 and 5.2.3). Such markings shall not be in contradiction with all the other required markings (see 5.3.2).
RID/ADR requires that all manufacturing markings (see Clause 6) are located in one group. Operational markings (see Clause 7) shall also be located in a single group. Certification markings (see Clause 8) shall also be located in a single group. These groups can be located together or in different locations on the cylinder.