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Sector regulating metering station PN 16 July 2011

SECTOR REGULATING METERING STATION PN 16

APPLICATION: Ensures the natural gas filtering, regulating, metering and is made-up by an assembly of devices, fittings and accessories mounted in an own construction, a metallic or thermo insulated cabinet. Through the RMS, the gas passes from the supply network (medium pressure) into the distribution network (reduced or low pressure).

D = Distribution

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Sector regulating metering station PN 16 July 2011

BASIC CONFIGURATION:

- filtering installation (filters with 10, 80, 100 or 160 µm finesse) with differential manometers - regulating installation (direct or indirect steered regulators, depending on the pressure and flow stages). - safety elements (blocking devices for under pressure/overpressure and safety valve) - metering installation (turbine or rotary meter and PTZ corrector) - indicating devices (manometers and thermometers) - metallic or thermo insulated cabinet

The sector stations can be manufactured in the following constructive types: - with metering downstream from regulating - with metering upstream from regulating - without metering (SRS) OPTIONAL EQUIPPING: - filter-separators - metering with other approved devices - local heating with electrical resistance in anti-ex assembly - butterfly flap valves TECHNICAL FEATURES: Table 1

(1) The following conditions will be regarded: P1 / P2 = max. 25 for low and reduced pressure

and P1 / P2 = max. 10 for medium pressure and P1min ≥ P2 + 0,3.

For P1 ≤ 4,2 bar, P1 and P2 can be established following the conditions P1 / P2 = min. 4 (2) The flows are expressed in m3/h and were calculated following v=20m/s.

FEATURES UM DNinlet / DNoutlet

50/50 50/80 50/100 80/80 80/100 80/150 100/100 100/150 100/200 Inlet pressure P1

(1)max/min

bar 0.5 ÷ 6

Inlet flow(2)

m3/h 157.34 157.34 157.34 365.22 365.22 365.22 630.56 630.56 630.56

Outlet pressure P2(1)

bar 0.02 ÷ 2

Outlet flow(2)

m3/h 157.34 365.22 630.56 365.22 630.56 1433.93 630.56 1433.93 2379.59

Operating fluid - Natural gas SR 3317 – 2003 Environment temperature

0C - 29 ÷ + 50

FEATURES UM DNinlet / DNoutlet

150/150 150/200 150/250 200/200 200/250 200/300 250/250 250/300 Inlet pressure P1

(1)max/min

bar 0.5 ÷ 6

Inlet flow(2)

m3/h 1433.93 1433.93 1433.93 2379.59 2379.59 2379.59 3783.94 3783.94

Outlet pressure P2(1)

bar 0.02 ÷ 2

Outlet flow(2)

m3/h 1433.93 2379.59 3783.94 2379.59 3788.94 5290.32 3783.94 5290.32

Operating fluid - Natural gas SR 3317 – 2003 Environment temperature

0C - 29 ÷ + 50

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Sector regulating metering station PN 16 July 2011

RMS selection example: Q = 2500 Nm3/h P1min = 2 bar P1max = 6 bar P2min = 0.5 bar 1. Pressure conditions fulfillment is checked: P1/P2 = 2/0.5 = 4<25

P1min ≥ 0.5 + 0,3 = 0.8 2. The flow is transformed from Nm3/h to m3/h for inlet and outlet pressure:

− inlet: hmP

Q3

min1

1

01325.1

2500

+=

=1

Q 829.66 hm3

− outlet: 01325.1

2500

min2

2

+=

PQ hm

3

=2

Q 1652.07 hm3

In table 1, the size of station with inlet flow larger than Q1 is chosen, in this case RMS DN150/200. The same way it is checked if Q2 is smaller than the outlet flow indicated in the table for. It can be observed that the flow Q2 < 2379.59, therefore the station was correctly selected.

ISOMETRICAL SCHEME Metering downstream from regulating type

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Sector regulating metering station PN 16 July 2011

Metering upstream from regulating type

Regulating station without metering

LEGEND:

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Sector regulating metering station PN 16 July 2011

SECTOR RMS PN 16 CABINET Usually the regulating metering stations are delivered in thermo insulated metallic cabinet. The cabinets are metallic constructions provided with doors on the sides to ease the access at installation. Optional they can be equipped with interior lightning system, in an anti-ex assembly. Upon request, thermo insulated cabinets can be manufactured.

Ca

bin

et

for

RM

S P

n 1

6*

Dn/Dn L[mm] l[mm] h[mm] H[mm] 50/50 3020 1520 2200 2300

50/80 3020 1520 2200 2300

50/100 3020 1520 2200 2300 80/80 3020 1520 2200 2300

80/100 3020 1520 2200 2300 80/150 4280 1760 2400 2500

100/100 4280 1760 2400 2500

100/150 4280 1760 2400 2500 100/200 4500 1900 2500 2600

150/150 5000 1760 2500 2600 150/200 7000 1900 2500 2600

*The cabinet dimensions are informative and can vary from one constructive type to another.