ISO 21003-1:2008 建物内の温水および冷水設備用の多層配管システム—パート1：一般 | ページ 6

3.1.1

多層パイプ

異なる応力設計層で構成されるパイプ

3.1.2

多層Mパイプ

ポリマー応力設計層と 1 つ以上の金属応力設計層で構成されるパイプ (例: PE-Xb/Al/PE-Xb または PE-RT/Al/PE-Xb)

注記 1:パイプの壁の厚さは少なくとも 60% のポリマー材料で構成されます。

3.1.3

多層P管

複数のポリマー応力設計層で構成されるパイプ (例: PVC-C/PE-Xb または PE-Xb/EVOH/PE-Xb)

注記 1:応力設計された 1 つのポリマー層と応力設計されていない外側のポリマー層で構成されるパイプは、適切な参照製品規格の対象となります (付録 A を参照)

3.1.4

内層

輸送される流体と接触する層

3.1.5

外層

外部環境にさらされた層

3.1.6

埋め込み層

外層と内層の間の層

3.1.7

アプリケーション層

パイプの使用条件にリンクされた特定のプロパティを提供するレイヤー

3.2.1

nominal diameter

d_n

specified outside diameter, in millimetres, assigned to a nominal size (DN/OD or DN/ID)

3.2.2

outside diameter

d_e

outside diameter measured through the pipe cross-section at any point on the pipe, or the spigot end of a fitting, rounded up to the nearest 0,1 mm

3.2.3

inside diameter

d_i

inside diameter measured through the pipe cross-section at any point on the pipe, rounded up to the nearest 0,1 mm

3.2.4

wall thickness

e

measured wall thickness at any point around the circumference of a component, rounded up to the nearest 0,1 mm

3.2.5

minimum wall thickness

e_min

minimum value of the measured wall thickness at any point around the circumference of a component, rounded up to the nearest 0,1 mm

3.2.6

metal layer standard dimension ratio

SDR_m

outside diameter of the metal layer of a pipe divided by the wall thickness of the metal layer

3.2.7

polymeric layer standard dimension ratio

SDR_p

outside diameter of the polymeric layer of a pipe divided by the wall thickness of the polymeric layer

3.3.1

overall service (design) coefficient

C

overall coefficient, with a value greater than one, which takes into consideration service conditions as well as properties of the components of a piping system other than those represented in the lower confidence limit, p_LPL

3.4.1

virgin material

material, in a form such as granules or powder, that has not been subjected to use or processing other than that required for its manufacture and to which no reprocessable or recyclable material has been added

3.4.2

own reprocessable material

single material prepared from rejected unused pipes and fittings, including trimmings from the production of pipes and fittings, that will be reprocessed in a manufacturer’s plant after having been previously processed by the same manufacturer by a method such as moulding or extrusion and for which the complete formulation is known

3.4.3

reference product standard

International Standard or draft International Standard, prepared by ISO/TC 138/SC 2, applicable to non-multilayer pipes, to which this International Standard can refer for clauses related to the materials, components (e.g. fittings) and fitness for purpose of the system

3.4.4

stress-designed polymeric layer

polymeric layer which is designed to be stress-bearing

Note 1 to entry: The material used in such layers is restricted to those in the reference product standards (see Annex A).

3.5.1

application class

class related to a typical field of application and a design period of 50 years

Note 1 to entry: The classification is taken from ISO 10508.

3.5.2

design pressure

p_D

highest pressure related to the circumstances for which the system has been designed and is intended to be used

Note 1 to entry: The design pressure, p_D, is equal to the maximum design pressure, MDP, as specified in EN 806-1.

3.5.3

long-term pressure strength

lower confidence limit of the predicted hydrostatic pressure

p_LPL

quantity, with the dimensions of pressure, which represents the 97,5 % (one-sided) lower confidence limit of the predicted hydrostatic pressure at a temperature T and time t

3.6.1

design temperature

T_D

temperature, or a combination of temperatures, of the conveyed water related to the circumstances for which the system has been designed

3.6.2

maximum design temperature

T_max

highest design temperature, T_D, occurring for short periods only

3.6.3

malfunction temperature

T_mal

highest temperature that can be reached when the control limits are exceeded

Note 1 to entry: This may occur during a total of up to 100 h over a period of 50 years.

3.6.4

cold water

water at a temperature of up to approximately 25 °C

Note 1 to entry: For design purposes, 20 °C is used.