Directive 2009/105/EC of the European Parliament and of the Council (repealed)Dangos y teitl llawn

4. DEFINITIONS AND SYMBOLS U.K.

4.1. Definitions U.K.

(a) The design pressure ‘P’ is the gauge pressure chosen by the manufacturer and used to determine the thickness of the vessel’s pressurised parts. U.K.

(b) The maximum working pressure ‘PS’ is the maximum gauge pressure which may be exerted under normal conditions of use of the vessel. U.K.

(c) The minimum working temperature T_min is the lowest stabilised temperature which the wall of the vessel may attain under normal conditions of use. U.K.

(d) The maximum working temperature T_max is the highest stabilised temperature which the wall of the vessel may attain under normal conditions of use. U.K.

(e) The yield strength ‘R_ET’ is the value at the maximum working temperature T_max of: U.K.

• the upper yield point R_eH, for a material with both a lower and an upper yield point,

• the proof stress R_p0,2, or

• the proof stress R_p1,0 in the case of non-alloy aluminium.

(f) Families of vessels: U.K.

Vessels form part of the same family if they differ from the prototype only in diameter, provided that the permissible requirements referred to in points 2.1.1 and 2.1.2 of Annex I are complied with, and/or in the length of their cylindrical portion within the following limits:

• where a prototype has one or more shell rings in addition to the ends, variants must have at least one shell ring,

• where a prototype has just two dished ends, variants must have no shell rings.

Variations in length causing the apertures and/or penetrations to be modified must be shown in the drawing for each variant.

(g) A batch of vessels consists at the most of 3 000 vessels of the model of the same type. U.K.

(h) There is series manufacture within the meaning of this Directive if more than one vessel of the same type is manufactured during a given period by a continuous manufacturing process, in accordance with a common design and using the same manufacturing processes. U.K.

(i) Inspection slip: document by which the producer certifies that the products delivered meet the requirements of the order and in which he sets out the results of the routine in-plant inspection test, in particular chemical composition and mechanical characteristics performed on products made by the same production process as the supply, but not necessarily on the products delivered. U.K.

4.2. Symbols U.K.

A	elongation after rupture	%
A 80 mm	elongation after rupture (Lo = 80 mm)	%
KCV	rupture energy	J/cm2
P	design pressure	Bar
PS	maximum working pressure	Bar
Ph	hydrostatic or pneumatic test pressure	Bar
Rp0,2	proof stress at 0,2 %	N/mm2
RET	yield strength at maximum working temperature	N/mm2
ReH	upper yield point	N/mm2
Rm	tensile strength	N/mm2
Rm, max	maximum tensile strength	N/mm2
Rp1,0	proof stress at 1,0 %	N/mm2
Tmax	maximum working temperature	°C
Tmin	minimum working temperature	°C
V	capacity of the vessel	l