ER 07 module

Medium

Fluid group

(see CEN/TR 13480-7:2002, 4.2)

Criteria

Piping category

See CEN/TR 13480-7

Gases ^a)

1

PS > 0,5 bar and DN > 350 or

PS > 0,5 bar and DN > 100 and

PS · DN > 3 500

III

 see Fig. A.1

PS > 0,5 bar and 100 < DN £ 350 and

PS · DN £ 3 500 or

25 < DN £ 100 and PS · DN > 1 000 or

25 < DN £ 350 and

1 000 < PS · DN < 3 500

II ^b)

PS > 0,5 bar and 25 < DN £ 100 and

PS · DN £ 1 000

I ^b)

PS > 0,5 bar and DN £ 25

0 (see 5.2)

2

PS > 0,5 bar and DN > 250 and

PS · DN > 5 000

III

see Fig. A.2

PS > 0,5 bar and DN > 250 and

3 500 < PS · DN £ 5 000 or

100 < DN £ 250 and PS · DN > 3 500

II ^c)

PS > 0,5 bar and DN > 32 and

1 000 < PS · DN £ 3 500 or

32 < DN £ 100 and PS · DN > 1 000

I

PS > 0,5 bar and DN £ 32 or

PS > 0,5 bar and PS · DN £ 1 000

0 (see 5.2)

all

PS £ 0,5 bar

(see 5.3)

Liquids ^d)

1

PS > 500 bar and DN > 25

III

see Fig. A.3

10 bar < PS £ 500 bar and DN > 25 and

PS · DN > 2 000

II

0,5 bar < PS £ 10 bar and

PS · DN > 2 000

I

PS > 0,5 bar and DN £ 25 or

PS > 0,5 bar and PS · DN £ 2 000

0

(see 5.2)

2

PS > 500 bar and DN > 200

II

see Fig. A.4

10 < PS £ 500 bar and DN > 200 and

PS · DN > 5 000

I

0,5 bar < PS £ 10 bar or

PS > 0,5 bar and DN £ 200 or

PS > 0,5 bar and PS · DN £ 5 000

0 (see 5.2)

all

PS £ 0,5 bar

(see 5.3)

—

^a) Gases: gases, liquefied gases, gases dissolved under pressure, vapors and also those liquids whose vapor pressure at the maximum allowable temperature is greater than 0,5 bar above normal atmospheric  pressure (1013 mbar)

^b) Piping intended for unstable gases and falling within categories I or II on the basis of Table 6 must be classified in category III. (Unstable gas is gas or vapor with a risk of sudden decomposition. If this decomposition takes place within an enclosed volume solely by slightly changing a single operating parameter, there is a pressure fluctuation.)

^c) All piping containing fluids at a temperature greater than 350 ºC and falling within category II on the basis of Table 7 must be classified in category III.

^d) Liquids: liquids whose vapor pressure at the maximum allowable temperature is greater than 0,5 bar above normal atmospheric  pressure,  (1 013  mbar)