SOA 4pp Apr 06 -...
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SOA - Orifice Assembly Bulletin 4.9 March 2013 FNAC Metering Orifice Assemblies provide accurate measurement of flows of gas or air to industrial burners and combustion systems. The assembly consists of specially designed cast iron or standard PN10 steel flanges with provision for pressure sampling, in between which is held an easily removable, stainless steel orifice plates. Pressure test points are fitted as standard on all orifice meter assemblies. FNAC can provide the orifice plate blank for customer boring or pre-bored from a range of standard sizes. Plates bored to special customer requirements are also available. The FNAC Metering Orifice Assemblies are available in two versions: screwed (SSOA) or weldable flanges (SWOA). All standard plate sizes are based on a differential pressure drop of 10mbar. NOTE: – due to the requirements of current European and UK codes of practice, BS EN 746- 2:2010, screwed meters larger than 2” bsp can only be used to measure air flow. Above this size, all gas meters must have weldable flanges. Design Considerations Under standard conditions, the maximum inlet pressure to the SOA should not exceed 1bar. Higher pressures are possible with the use of special sealing materials – refer to FNAC. Installation It is important to install the SOA unit in a straight section of pipework. The minimum length of straight section required is dependant upon the location but even under the most favourable circumstances 10 D upstream and 5 D downstream is required (where D = the inside pipe diameter). The exact requirements are dependant upon the nature of the up-stream and downstream fittings, (i.e. valves, bends) and the diameter ratio of the orifice plate. As a general rule, the more bends before an SOA and the larger the diameter ratio, then the longer the upstream straight section must be. Some installations may require as much as 80 D upstream of the SOA. For further information consult either EN ISO 5167-1:1997 or contact FNAC. Ordering Information When placing your order, please confirm the Part Code you require (ref. Table 1) and the desired plate size. Should you require a plate size that is not listed, please contact FNAC with the following information: a) Required SOA size/pipe size b) Medium with density at NTP c) Upstream temperature of Medium (°C) d) Required Differential Pressure Drop “∆P” (mbar) e) Upstream Supply Pressure (prior to SOA) d) Required Flow of Medium (Nm 3 /h) Maintenance / Spares Under normal circumstances, the SOA will require no maintenance. There are no spares for this item. SOA – Features ■ Available to suit pipe sizes up to 150 NB ■ Simple and quick removal of orifice plates ■ Stainless steel orifice plates as standard ■ Wide range of plate sizes to EN5167 ■ Screwed and weldable flanges available ■ Robust design ■ Optional plate size ■ Suitable for temperatures up to 350°C Fives North American Combustion UK, Ltd. Fives North American Combustion UK, Ltd. Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552 email: [email protected] www.fivesgroup.com/fivesna
Transcript of SOA 4pp Apr 06 -...
SOA - Orifice AssemblyBulletin 4.9
March 2013
FNAC Metering Orifice Assemblies provide accuratemeasurement of flows of gas or air to industrialburners and combustion systems.
The assembly consists of specially designed castiron or standard PN10 steel flanges with provision forpressure sampling, in between which is held aneasily removable, stainless steel orifice plates.Pressure test points are fitted as standard on allorifice meter assemblies. FNAC can provide theorifice plate blank for customer boring or pre-boredfrom a range of standard sizes. Plates bored tospecial customer requirements are also available.
The FNAC Metering Orifice Assemblies are availablein two versions: screwed (SSOA) or weldable flanges(SWOA). All standard plate sizes are based on adifferential pressure drop of 10mbar.
NOTE: – due to the requirements of currentEuropean and UK codes of practice, BS EN 746-2:2010, screwed meters larger than 2” bsp can onlybe used to measure air flow. Above this size, all gasmeters must have weldable flanges.
Design ConsiderationsUnder standard conditions, the maximum inletpressure to the SOA should not exceed 1bar. Higherpressures are possible with the use of specialsealing materials – refer to FNAC.
InstallationIt is important to install the SOA unit in a straightsection of pipework. The minimum length of straightsection required is dependant upon the location buteven under the most favourable circumstances 10 D
upstream and 5 D downstream is required (where D= the inside pipe diameter). The exact requirementsare dependant upon the nature of the up-stream anddownstream fittings, (i.e. valves, bends) and thediameter ratio of the orifice plate. As a general rule,the more bends before an SOA and the larger thediameter ratio, then the longer the upstream straightsection must be. Some installations may require asmuch as 80 D upstream of the SOA. For furtherinformation consult either EN ISO 5167-1:1997 orcontact FNAC.
Ordering InformationWhen placing your order, please confirm the PartCode you require (ref. Table 1) and the desired platesize. Should you require a plate size that is notlisted, please contact FNAC with the followinginformation:
a) Required SOA size/pipe size
b) Medium with density at NTP
c) Upstream temperature of Medium (°C)
d) Required Differential Pressure Drop“∆P” (mbar)
e) Upstream Supply Pressure (prior to SOA)
d) Required Flow of Medium (Nm3/h)
Maintenance / SparesUnder normal circumstances, the SOA will requireno maintenance. There are no spares for this item.
SOA – Features� Available to suit pipe sizes up to 150 NB� Simple and quick removal of orifice plates� Stainless steel orifice plates as standard� Wide range of plate sizes to EN5167� Screwed and weldable flanges available� Robust design� Optional plate size� Suitable for temperatures up to 350°C
Fives North American Combustion UK, Ltd.
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD EnglandTel +44 (0) 1902 891200 Fax +44 (0) 1902 895552email: [email protected] www.fivesgroup.com/fivesna
Page 2Bulletin 4.9
Plate Selection (Medium - Air)
Plate Selection (Medium - Natural Gas)
Air Flow SWOA - 50 SWOA - 65 SWOA - 80 SWOA - 100 SWOA - 150Nm3/h SSOA - 50 SSOA - 65 SSOA - 80
Plate Orifice Plate Orifice Plate Orifice Plate Orifice Plate Orificediameter (mm) diameter (mm) diameter (mm) diameter (mm) diameter (mm)
10 A-10 12.2715 A-15 15.00 A-15 15.0420 A-20 17.27 A-20 17.3325 A-25 19.26 A-25 19.35 A-25 19.4135 A-35 22.65 A-35 22.81 A-35 22.9250 A-50 26.77 A-50 27.09 A-50 27.31 A-50 27.4570 A-70 31.14 A-70 31.73 A-70 32.14 A-70 32.40100 A-100 36.14 A-100 37.25 A-100 38.06 A-100 38.57 A-100 38.87150 A-150 41.93 A-150 44.07 A-150 45.74 A-150 46.85 A-150 47.49200 A-200 49.00 A-200 51.69 A-200 53.57 A-200 54.68250 A-250 56.45 A-250 59.23 A-250 60.95350 A-350 68.35 A-350 71.58450 A-450 75.40 A-450 80.47600 A-600 91.55800 A-800 103.391250 A-1250 122.16
Gas Flow SWOA - 40 SWOA - 50 SWOA - 65 SWOA - 80 SWOA - 100Nm3/h SSOA - 40 SSOA - 50 SSOA - 65 SSOA - 80 SSOA - 100
Plate Orifice Plate Orifice Plate Orifice Plate Orifice Plate Orificediameter (mm) diameter (mm) diameter (mm) diameter (mm) diameter (mm)
10 G-10 10.7915 G-15 13.17 G-15 13.2320 G-20 15.16 G-20 15.25 G-20 15.2825 G-25 16.88 G-25 17.01 G-25 17.0735 G-35 19.80 G-35 20.05 G-35 20.14 G-35 20.2150 G-50 23.30 G-50 23.79 G-50 23.97 G-50 24.1070 G-70 26.92 G-70 27.82 G-70 28.18 G-70 28.42 G-70 28.57100 G-100 32.58 G-100 33.27 G-100 33.76 G-100 34.06150 G-150 38.37 G-150 39.78 G-150 40.83 G-150 41.49200 G-200 44.69 G-200 46.44 G-200 47.59300 G-300 54.95 G-300 57.37400 G-400 61.07 G-400 65.03500 G-500 71.24700 G-600 80.64
Gas Flow SWOA - 10 SWOA - 15 SWOA - 20 SWOA - 25 SWOA - 32Nm3/h SSOA - 10 SSOA - 15 SSOA - 20 SSOA - 25 SSOA - 32
Plate Orifice Plate Orifice Plate Orifice Plate Orifice Plate Orificediameter (mm) diameter (mm) diameter (mm) diameter (mm) diameter (mm)
2 G-2 4.806 G-6 7.87 G-6 8.11 G-6 8.26 G-6 8.32 G-6 8.3610 G-10 10.14 G-10 10.51 G-10 10.67 G-10 10.7615 G-15 12.61 G-15 12.93 G-15 13.1220 G-20 14.21 G-20 14.75 G-20 15.0625 G-25 16.27 G-25 16.7435 G-35 19.5350 G-50 22.79
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FNAC 03/2013 SOA
Page 3Bulletin 4.9
Flow Characteristics – Air
Flow Characteristics – Gas
10,000
1,000
100
10
1
0.10.1 1 10 100
A350
A800A600A450
A1250
A70A100
A35A50
A20
A10
A25
A15
A250A200
A150
Pressure drop across orifice (mbar)
Flow
-Com
bustionair(Nm
3 /h)(referenc
eco
ndition
s-
S.G1.0,
pres
sure
60mba
r,tempe
rature
20°C
)
10,000
1,000
100
10
1
0.10.1 1 10 100
G200
G500G400G300
G700
G35
G50
G20G25
G10G15
G6
G2
G150G100
G70
Pressure drop across orifice (mbar)
Flow
-Natural
gas(Nm
3 /h)(referenc
eco
ndition
s-
S.G0.56
,press
ure40
mba
r,tempe
rature
20°C
)
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FNAC 03/2013 SOA
Page 4Bulletin 4.9
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FNAC 03/2013 SOA
Dimensions – Table 1
Page 5Bulletin 4.9
Dimensions – Table 2
Dimensions – Table 3
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FNAC 03/2013 SOA
WARNING: The data outlined is for information only and does not form part of any contract. Our policy is one of continuous improvement andwe therefore reserve the right to modify specifications or dimensions without prior warning. Situations dangerous to personnel and property candevelop from incorrect installation and operation of combustion equipment. Fives North American Combustion UK, Ltd urges compliance withInternational, National and Local Safety Standards and that installation is carried out by properly qualified personnel.
