Siemens SITRANS P - Manual (Page 232)

SITRANS P measuring instruments for pressure
Fittings - Accessories
Compensation vessels
2/232 Siemens FI 01 · 2009
2
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Overview
The compensation vessels prevent the level difference which oc-
curs with pressure changes in the pressure lines and which fal-
sifies the measurement.
According to DIN 19211, the temperature in the compensation
vessel must be assumed to be 50 K less than the steam temper-
ature in the pipe when calculating the wall thicknesses. This is
because the temperature in the compensation vessel during op-
eration can only rise up to the saturated steam temperature.
A material acceptance test certificate A to EN 10204-3.1 is avail-
able for the materials from which the compensation vessels are
made.
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Characteristic curves
Permissible operating pressure as a function of the permissible operating
temperature
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Dimensional drawings
Compensation vessel 7MF9015-1.., dimensions in mm
Compensation vessel 7MF9015-5.., dimensions in mm
0
100
200
300
400
bar
°C 0 100 200 300 400
500
500 600
E
D
C
B
A
Op
era
tin
g p
re
ss
ure
Operating temperature
100
88,9
100
I
O
O Output (see Ordering data for dimensions)
I Input (see Ordering data for dimensions)
65
35
1
) 58
1
) I
O
approx. 110
I Input (see Ordering data for dimensions)
O Output (see Ordering data for dimensions)
1 ) 30 mm longer with 7MF9015-5A.
Selection and Ordering data
Compensation vessel, without certificate
Max.
working
pressure Characteristic 1) Material Mat. No. Connections Approx.
contents
cm³ Approx.
weight
kg Order No.
Input Output
7 M F 9 0 1 5 - 7 7 A
160 bar A 16 Mo 3 1.5415 Threaded socket G½,
form R, DIN 19207 Threaded socket G½,
form V, DIN 19207 250 0.8 1 A
250 bar B 16 Mo 3 1.5415 Welding sleeve
∅ 21 mm × 6.3 mm
Welding sleeve
∅ 21.3 mm × 6.3 mm
250 0.8 1 B
250 bar B 16 Mo 3 1.5415 Welding sleeve
∅ 24 mm × 7.1 mm
Welding sleeve
∅ 24 mm × 7.1 mm
250 1 1 C
250 bar C 11 CrMo 9 10 1.7383 Welding sleeve
∅ 24 mm × 7.1 mm
Welding sleeve
∅ 24 mm × 7.1 mm
250 1 1 D
250 bar B 16 Mo 3 1.5415 Welding sleeve
∅ 33.7 mm × 4.5 mm
Welding sleeve
∅ 24 mm × 7.1 mm
250 0.7 1 E
160 bar A 16 Mo 3 1.5415 Threaded socket G½,
form R, DIN 19207 Threaded socket G½,
form V, DIN 19207 20 1.6 5 A
500 bar D 16 Mo 3 1.5415 Welding sleeve
∅ 21 mm × 6.3 mm
Welding sleeve
∅ 21.3 mm × 6.3 mm
20 1.6 5 B
500 bar D 16 Mo 3 1.5415 Welding sleeve
∅ 24 mm × 7.1 mm
Welding sleeve
∅ 24 mm × 7.1 mm
20 1.6 5 C
500 bar E 11 CrMo 9 10 1.7383 Welding sleeve
∅ 24 mm × 7.1 mm
Welding sleeve
∅ 24 mm × 7.1 mm
20 1.6 5 D
Accessories
Factory test certificate EN 10204–2.2 7MF9000-8AB
Material acceptance test certificate EN 10204-3.1 7MF9000-8AD
1) See Figure "Permissible working pressure as a function of the permissible working temperature"
© Siemens AG 2008