Duplex Flanges manufacturer in India

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EN 1092-2 Alloy 2205 SORF Flange & Duplex Stainless Steel Blind Flange manufacturer in India

What is Duplex Flanges?
The Duplex steel is a variant of austenitic-ferritic stainless steel that offers much higher resistance to stress corrosion cracking compared to the austenitic stainless steel of 304 and 316 grades. However, the duplex steel possesses lower impact strength and toughness. The duplex steel material is included in the category of 2205, F53, and F60 grades. The Duplex Flanges are used across several industries and their popularity have increased due to the unique chemical and mechanical properties. They offer enhanced features compared to the basic stainless steel. Also, due to the increased availability of the Duplex Flanges, they have become cost-effective in recent years.
The ferritic-austenitic hybrid granular structure of duplex steel comes with an enhanced strength to weight ratio when compared to the 304 or 316 grades of stainless steel. It has good weldability, and mechanical toughness in applications with a colder ambient temperature. Due to all these features, the Duplex Flanges are widely used in off-shore drilling and marine applications. It is known for its excellent corrosion-resistant properties. One can also find the Duplex Flanges pressure vessel and desalination equipment.
However, it is to be noted that the duplex material comes with low formidability. This grade of stainless steel is used for making flanges that help establish simple connections. The Duplex Flanges are not preferred in case of complex metallic shapes. However, the formidability becomes less of an issue for structural steel as more preferences are given to simple mild steel for various types of non-corrosive applications.
There are several benefits getting the Duplex Flanges, like:

  • They possess improved strength- they are almost twice as much stronger as the austenitic and ferritic grades of stainless steel.
  • Toughness and durability- It is more formable in high pressure conditions compared to other stainless steel types. Their unique chemical composition also gives the flanges high toughness and durability.
  • Corrosion resistance- They offer comparable and sometimes better corrosion resistance compared to the austenitic grades of stainless steel.
  • Cost-effectiveness- The duplex steel comes with all the above properties but they have low amounts of nickel and molybdenum in its chemical composition, which makes the flanges very cost-effective.

Duplex 2205 RTJ Flanges Vs Duplex F51 Weld Neck Flange
The Duplex 2205 stainless steel material is widely used for services that need corrosion resistance and high strength- they are ideal for high pressure applications. The Duplex 2205 RTJ Flanges are machined metallic rings that have cuts and deep grooves in its face. It helps to give a leak-proof highly sealed piping connection.
The F51 grade of duplex stainless steel comes with improved stress corrosion cracking resistance, and they also resist crevice corrosion pitting, and possess high strength. The Duplex F51 Weld Neck Flange is ideal for chloride and sulphide environments, where the conditions are severe and critical. The weld neck flange comes with a tapered hub that is capable of relocating the stress of the pipe and ensures to decrease the high stress concentration present at the flange’s bottom.

UNS S31803 Slip On Flange Vs ASTM A182 Duplex Steel Blind Flange
The UNS S31803 can be defined as a ferritic-austenitic duplex grade stainless steel that possesses high strength and good corrosion resistance properties. The UNS S31803 slip-on flanges are used for considerably low pressure applications that have little leakage risks, in chloride or sulfide environments. It is a popular grade for flange that is used across several industries.
The ASTM A182 Duplex Steel Blind Flange looks like a steel plate with bored holes surrounding it and without a central hole. They are used for blocking the piping connections or to seal the nozzles of a valve. It is mainly used where the pipe is not under frequent use or for those pipes that need frequent inspection, maintenance, modifications.

What is properties of Duplex Stainless Steel Flanges?
Due to the chemical composition, the properties of Duplex Stainless Steel Flanges include:

  • They are resistant to general and stress corrosion.
  • It has high stress and thus the duplex flanges are hard to fracture, neither by stress corrosion, nor by fatigue.
  • They are magnetic in nature.
  • They have high tensile strength.
  • High mechanical strength.
  • Twice the elastic limit compared to other types of austenitic steel.
  • Higher tenacity compared to ferritic steel.
  • Lower thermal expansion.
  • Constant hardness which remains unaffected by heat treatment.
  • Possesses high weldability and workability.

All these properties help to make the duplex steel a very adaptable material. It means they can be transformed in several ways to meet some specific needs. All these properties makes it one of the most demanded materials in the world.

Save 8-10% if you buy directly from duplex flanges manufacturers in India, we at Petromet Flange offer lowest price in Asia.
Duplex Flanges

Duplex Flanges

European Directive 2014/68/eu certified Duplex Flanges manufacturer in India offers widest range of ASTM A182 F51 Weld Neck Flange, Spades, Spectacle Blinds, Ring Spacers and UNS S31803 Lap Joint Flange in Mumbai

Table of Content


Size Range 1/2″(15 NB) to 48″ (1200NB)
Pressure Rating Chart ANSI 150 LBS, 300 LBS, 2500 LBS, 900 LBS, 600 LBS, 1500 LBS
JIS 16 K, 5K, 10 K, 20 K, 30 K, 40 K, 63 K
Manufacturer of Connect Type/ Flange Face Type RF, Small Tongue, RTJ, FF, LJF, Large Tongue & Groove
Coating Zinc Plated, Anti-rust Paint, Yellow Transparent, Oil Black Paint, Cold and Hot Dip Galvanized
Manufacturer of GOST, JIS, ANSI, DIN, UNI, BS, AWWA, AS2129, SABS, NFE, EN etc.
DIN Pressure Calculation 25Bar 40Bar 16Bar 6Bar 10Bar / PN64 PN10 PN25 PN16 PN6 PN40
Equipment Pushing Machine, Press machine, Sand-blasting machine, Bending machine, electric bevelling machine etc
Origin Japan / West Europe / Indian / USA / Korean
UNI / EN 16Bar 6Bar 40Bar 10Bar 25Bar
Test X-ray detector, Direct-reading Spectrograph, Magnetic particle detector, Ultrasonic flaw detector, Hydrostatic testing machine
Standards Provided By Manufacturer ISO70051, MSS S44, API7S-43, API605, B16.48, ANSI/ASME B16.5, B16.47 Series A & B, BS4504, JISB2220, BS1560-3.1, ASME/ANSI B16.5/16.36/16.47A/16.47B, BS 10, EN-1092, DIN, API7S-15, EN1092
Common Types By Manufacturer Threaded / Screwed / Forged / Plate
Production technique Used By Manufacturer Heat treated, Forged and machined

Well known S31803 Duplex Stainless Steel Flange wholesalers, supplier, exporters, dealers, stockholders, importer, stockists, distributor and Manufacturer in Mumbai

Pipe NBBolt PCDNo. of BoltsBolt SizeFlange OD
1/2"2 3/8"41/2"3 1/2"
1"3 1/8"41/2"4 1/4"
2"4 3/4"45/8"6"
4"7 1/2"85/8"9"
6"9 1/2"83/4"11"
8"11 3/4"83/4"13 1/2"
10"14 1/4"127/8"16"
12"17 "127/8"19"
14"18 3/4"121"21"
Temperature °F Class 150 Class 600 Class 1500 Class 400 Class 900 Class 300 Class 2500
-20 to 1002751440360096021607206000
3002051080270072016205404500
2002301200300080018006005000
400190995248566014904954140
600140875218558013104353640
650125860215057512904303580
500170930233062013954653880
700110850212556512754253540
75095830207555512454153460
85065790198053011903953300
80080805201554012104053360
90050780194552011653903240
95035765191051011453803180
10002064016054309653202675
11002051512853457702552145
1150204009952655952001655
10502061515454109253102570
1200203107702054651551285
125020225565150340115945
13002017043011525585715
140020952406514550400
1350201253108018560515
145015701704510535285
15001055135358025230

Duplex Blind Flange Dimensions

Size in Inch Size in mm ISO Stud Size RF Height Outer Dia. RF Dia. Hole Size PCD No of Bolts Bolt Size UNC Flange Thickness RF Stud Length Weight in kg
D A C E B
1/215M20713534.97/888.943/430.21203.2
3/420M20714042.97/895.243/431.81253.7
125M24716050.8110847/8351405
1 1/432M27718563.51 1/8130.24138.11507.8
1 1/240M307205731 1/414641 1/844.517010.5
250M27723592.11 1/8171.48150.918018
2 1/265M307265104.81 1/4196.881 1/857.219525.5
380M3373051271 3/8228.681 1/466.722039
4100M397355157.21 5/827381 1/276.225561.5
5125M457420185.71 7/8323.881 3/492.1300102
6150M527485215.92 1/8368.382108345157
8200M527550269.92 1/8438.2122127380241
10250M647675323.82 5/8539.8122 1/2165.1490470
12300M7277603812 7/8619.1122 3/4184.2540575

Supplier of ASTM A182 Gr F51 Threaded Flange, UNS S32205 Slip On Flange and Duplex 2205 Forged Flange offers Hydrotest and Pneumatic Test to confirm the integrity of weldments

UNS S31803 Slip On Flange Dimensions
Size in InchSize in mmNo of BoltsOuter Dia.Hub ODISO Stud SizeFlange LengthRF HeightFlange Thick.RF Dia.PCDHole SizeSocket BoreWeight in kg
ACDFBEGH
1/21549030M141429.634.960.35/822.20.8
125411049M1416212.750.879.45/834.50.9
3/420410038M1414211.242.969.95/827.70.9
1 1/432411559M1419214.363.588.95/843.21.4
250415078M1624217.592.1120.73/461.92.3
1 1/240412565M1421215.97398.45/849.51.4
2 1/265418090M1627220.7104.8139.73/474.63.2
3804190108M1629222.3127152.43/490.73.7
41008230135M1632222.3157.2190.53/4116.15.9
3 1/2908215122M1630222.3139.7177.83/4103.45
51258255164M2035222.3185.7215.97/8143.86.8
82008345246M2043227269.9298.57/8221.513.7
1025012405305M2448228.6323.83621276.219.5
61508280192M2038223.9215.9241.37/8170.78.6
1230012485365M2454230.2381431.8132729
2460020815663M3381246.1692.2749.31 3/8616100
1640016595457M2762235469.9539.81 1/8410.554
1845016635505M3067238.1533.4577.91 1/4461.859
1435012535400M2756233.4412.8476.31 1/8359.241
2050020700559M3071241.3584.26351 1/4513.175

SS 2205 Duplex Weld Neck Flange Dimensions

Flange NPSHInside
Diameter		Flat Face
Thickness (T2)		Outside
Diameter		Raised Face
(RF)		Raised Face
(R)		H1Raised Face
Thickness (T)		T1Bolt Circle
(BC)		Bolt Hole
(B)		No. of
Bolt Holes
1/2"1.19"0.62"1.82"3.50".063"1.38"0.84"1.88".38"2.38".62"4
1-1/4"2.31"1.38"2.19"4.62".063"2.50"1.66"2.25".56"3.50".62"4
3/4"1.50"0.82"2.00"3.88".063"1.69"1.05"2.06".44"2.75".62"4
1-1/2"2.56"1.61"2.38"5.00".063"2.88"1.90"2.44".62"3.88".62"4
1"1.94"1.05"2.13"4.25".063"2.00"1.32"2.19".50"3.12".62"4
2"3.06"2.07"2.44"6.00".063"3.62"2.38"2.50".69"4.75".75"4
2-1/2"3.56"2.47"2.69"7.00".063"4.12"2.88"2.75".82"5.50".75"4
3"4.25"3.07"2.69"7.50".063"5.00"3.50"2.75".88"6.00".75"4
4"5.31"4.03"2.94"9.00".063"6.19"4.50"3.00".88"7.50".75"8
5"6.44"5.05"3.44"10.00".063"7.31"5.56"3.50".88"8.50".88"8
3-1/2"4.81"3.55"2.75"8.50".063"5.50"4.00"2.81".88"7.00".75"8
6"7.56"6.07"3.44"11.00".063"8.50"6.63"3.50".94"9.50".88"8
8"9.69"7.98"3.94"13.50".063"10.62"8.63"4.00"1.06"11.75".88"8
22"24.25"21.25"5.82"29.50".063"25.25"22.00"5.88"1.75"27.25"1.38"20
10"12.00"10.02"3.94"16.00".063"12.75"10.75"4.00"1.13"14.25"1.00"12
12"14.38"12.00"4.44"19.00".063"15.00"12.75"4.50"1.19"17.00"1.00"12
16"18.00"15.25"4.94"23.50".063"18.50"16.00"5.00"1.38"21.25"1.12"16
18"19.88"17.25"5.44"25.00".063"21.00"18.00"5.50"1.50"22.75"1.25"16
14"15.75"13.25"4.94"21.00".063"16.25"14.00"5.00"1.32"18.75"1.12"12
20"22.00"19.25"5.63"27.50".063"23.00"20.00"5.69"1.63"25.00"1.25"20
24"26.12"23.25"5.94"32.00".063"27.25"24.00"6.00"1.82"29.50"1.38"20
Bulk discount on raised and flat face UNS S32205 Duplex Steel Flanges and DIN 1.4462 Plate Flange in Maharashtra
Duplex Flanges Price Per Piece in India Price Applicable for jan 2022 to june 2022 Price Applicable for July 2022 to December 2022
DUPLEX SS FLANGE LWNRF SA182 GR. F51 (UNSS31803) NPS 2 (DN 50) X 19.5 MM THK X CLASS 600 ASME B16.5 Per Piece US $236.31 US $238.31
DUPLEX SS FLANGE LWNRF SA182 GR. F51 Per Piece US $253.89 US $255.89
300# BLRF DUPLEX -FLANGE Per Piece US $60.73 US $62.73
1" A182 F61 B16.5 Duplex Blind Pipe Flange Per Kg US $2.98 US $4.98

We are Duplex Flanges Manufacturer in India in Various forms Such as Slip on, Blind, Weld Neck and Socket Weld Flange. This is an approximate Cost of ASME B16.5 Duplex 2205 Flanges in India. Compare our price with other A182 F51 Duplex Stainless Steel Flanges manufacturer in India.

Sizes in InchImperfections Max. Radial Projection
No deeper than the serrations bottom, mmSerrations Deeper Than the Serrations Bottom, mm
1/23.01.5
1 1/23.01.5
13.01.5
1 1/43.01.5
23.01.5
3/43.01.5
34.51.5
3 1/26.03.0
46.03.0
2 1/23.01.5
56.03.0
88.04.5
108.04.5
66.03.0
128.04.5
1812.06.0
148.04.5
2012.06.0
1610.04.5
2412.06.0
FlangeTolerance Table
DInside Diameter (I.D.)
  • 10" and smaller: ±1/32" (0.8 mm)
  • 12" thru 18": +1/8" (3.2 mm)
  • 20" and larger: -1/16" (1.6 mm)
KLength of hub
  • 10" and smaller: ±1/16" (1.6 mm)
  • 12" and larger: ±1/8" (3.2 mm)
BDiameter of contact face
  • 1/16" raised face: ±1/32" (0.8 mm)
  • 1/4" RF (Raised Face), T/G (Tongue & Groove), (male & female), (m/f): ±1/64" (0.4 millimeter)
AO.D. (Outside Diameter)
  • When O.D. (Outside Diameter) is 24" or less: ±1/16" (1.6 millimeter)
  • When O.D. (Outside Diameter) is over 24": ±1/8" (3.2 millimeter)
JDiameter of hub at base
  • When hub base is 24" or smaller: ±1/16" (1.6 millimeter)
  • When hub base is over 24": ±1/8" (3.2 millimeter)
PDrilling
  • Circle Bolts: ±1/16" (1.6 mm)
  • Bolts hole spacing: ±1/32" (0.8 mm)
 Eccentricity of bolt circle with respect to facing
  • 2 1/2" and smaller ±1/32" (0.8 mm) maximum
  • 3" and larger ±1/16" (1.6 mm) maximum
HDiameter of hub at point of welding
  • 5" and smaller: +3/32" (2.4 mm), -1/32" (0.8 mm)
  • 6" and larger: +5/32" (4.0 mm), -1/32 (0.8 mm)
CThickness
  • 18" and smaller: ±1/8" (3.2 mm), -0"
  • 20" and larger: ±3/16" (4.8 mm), -0"
Grade Phosphorus Carbon Silicon Sulfur Chromium Molybdenum Nickel Nitrogen Iron Manganese
S31803 / S32205 0.030 Maximum 0.030 Maximum 1.00 Maximum 0.020 Maximum 22.0 To 23.0 3.0 To 3.5 4.50 To 6.50 0.14 To 0.20 63.72 Minimum 2.00 Maximum
Grades Density (g/cm 3) Density (lb/in 3) Melting Point (°C) Melting Point (°F)
S31803 / S32205 7.805 0.285 1420 – 1465 2588 – 2669
STANDARD UNS WNR
2205 S31803 / S32205 1.4462
Check Duplex 2205 Flanges, ASTM A182 gr F51 Orifice Flanges and SA 182 F51 Duplex Steel Socket Weld Flange pressure ratings & price list
Grade Density
(kg/m3)		 Elastic
Modulus (GPa)		 Mean Co-eff of Thermal
Expansion (μm/m/°C)		 Thermal
Conductivity (W/m.K)		 Specific
Heat
0-100°C ( J/kg.K)		 Electrical
Resistivity
(nΩ.m)
0-100°C 0-315°C 0-538°C at 100°C at 500°C
220578219013.714.2-19-418850
A182 Gr F60 Forged Flanges

A182 Gr F60 Forged Flanges

SS 2205 Socket Weld Flange

SS 2205 Socket Weld Flange

Alloy 2205 SWRF Flanges

Alloy 2205 SWRF Flanges

Sa182 F51 Weld Neck Flanges

Sa182 F51 Weld Neck Flanges

2205 Duplex Steel Spectacle Blind Flange

2205 Duplex Steel Spectacle Blind Flange

5000 NB SA182 F60 Blind Flange

5000 NB SA182 F60 Blind Flange

ASTM A182 Grade F60 Blind Raised Face Flange

ASTM A182 Grade F60 Blind Raised Face Flange

SS 2205 Duplex Raised Face Flange

SS 2205 Duplex Raised Face Flange

DIN 1.4462 Slip On Flange

DIN 1.4462 Slip On Flange

A182 Gr F51 Puddle Flange

A182 Gr F51 Puddle Flange

600 LBS F51 Duplex Long Weld Neck Flange

600 LBS F51 Duplex Long Weld Neck Flange

SA 182 F60 Flat Face Flange

SA 182 F60 Flat Face Flange

A182 F51 Nipoflange

A182 F51 Nipoflange

UNS S32205 SORF Flanges

UNS S32205 SORF Flanges

150 LBS SA 182 F51 Threaded Flange

150 LBS SA 182 F51 Threaded Flange

WNR 1.4462 Girth Flanges

WNR 1.4462 Girth Flanges

ASTM A182 F60 Spades ring spacers flanges

ASTM A182 F60 Spades ring spacers flanges

A182 F51 Uns S31803 Expander Flanges

A182 F51 Uns S31803 Expander Flanges

Duplex 2205 Weld neck Raised Face Flanges

Duplex 2205 Weld neck Raised Face Flanges

SA-182 F60 S32205 Reducing Flanges

SA-182 F60 S32205 Reducing Flanges

2500 LBS SAF 2205 Duplex Lapped Joint Flange

2500 LBS SAF 2205 Duplex Lapped Joint Flange

SS S32205 Tongue & Groove Flange

SS S32205 Tongue & Groove Flange

1500 LBS ASTM A182 Duplex Steel BLRF Flanges

1500 LBS ASTM A182 Duplex Steel BLRF Flanges

ASTM A 182 F51 Plate Flange

ASTM A 182 F51 Plate Flange

15 NB ASTM A 182 Gr F51 WNRF Flange

15 NB ASTM A 182 Gr F51 WNRF Flange

900 LBS ASTM A182 Gr F51 Ring Joint Flange

900 LBS ASTM A182 Gr F51 Ring Joint Flange

A182 F51 Duplex Stainless Steel Slip on RF Flanges

A182 F51 Duplex Stainless Steel Slip on RF Flanges

UNS S31803 Screwed Flange

UNS S31803 Screwed Flange

300 LBS SS 2205 Duplex Steel Orifice Flanges

300 LBS SS 2205 Duplex Steel Orifice Flanges

Duplex 2205 Flanges

Duplex 2205 Flanges

Duplex Blind Flange

Duplex Blind Flange

Duplex F51 Flange

Duplex F51 Flange

2205 Duplex Flanges

2205 Duplex Flanges

Duplex Stainless Steel Flanges

Duplex Stainless Steel Flanges

Duplex Steel Flanges

Duplex Steel Flanges

Avesta 2205 Flanges

Avesta 2205 Flanges

2205 Duplex Steel Flanges

2205 Duplex Steel Flanges

Alloy 2205 Stainless Steel Flange

Alloy 2205 Stainless Steel Flange

SAF 2205 Spectacle Blind Flanges

SAF 2205 Spectacle Blind Flanges

ASTM A182 F61 Flange

ASTM A182 F61 Flange

ASTM A182 F51 Flange

ASTM A182 F51 Flange

ASTM A182 F60 Flange

ASTM A182 F60 Flange

NPS (Nominal Pipe Size)NPT (Threaded)WRNR (Weld Neck)SWRF (Socket Weld)Loose (Lap Joint)SORF (Slip On)BLRF (Blind)
½122112
¾222222
1232222
1¼333333
1½343334
2565555
2½8108887
3911.59999
3½121211111113
41316.513131317
5152115151520
6192619191927
8304230303047
10435443434370
126488646464123
14901149010590140
169814098140106180
18130165130160130220
20165197165195165285
22185225185245185355
24220268220275220430
HS Code 73072100 Duplex SS Flange
Hardness 217 MPa
  • Direct-reading Spectrograph
  • X-ray detector
  • Magnetic particle detector
  • Flattening Test
  • PMI Testing
  • UI trasonic flaw detector
  • Hydrostatic testing machine
  • Flaring Test
  • Hardness Test
  • Pitting Resistance Test
  • Ship Building
  • Paper & Pulp
  • Oil And Gas Industry
  • Nuclear Power
  • Marine Applications
  • Power Plants
  • Fossil Fuel Power Plants
  • Refineries
  • Although typically less expensive than a weld-neck flange, welding costs can be higher.
  • It's easy to install because there's less need to trim the pipe length precisely.
  • For easy bolt alignment, the slide on flange is free to spin on the pipe.
Nom Pipe SizeODSch 80Sch 10Sch 140Sch 30Sch 40Sch 60EXT HvySTD WallSch 20Sch 100Sch 160Sch 120XX Hvy
½0.840.1470.0830.1090.1470.1090.1880.294
¾1.050.1540.0830.1130.1540.1130.2190.308
11.3150.1790.1090.1330.1790.1330.250.358
1 ¼1.660.1910.1090.140.1910.140.250.382
1 ½1.90.20.1090.1450.20.1450.2810.4
22.3750.2180.1090.1540.2180.1540.3440.436
2 ½2.8750.2760.120.2030.2760.2030.3750.552
33.50.30.120.2160.30.2160.4380.6
3 ½40.3180.120.2260.3180.2260.636
44.50.3370.120.2370.3370.2370.5310.4380.674
55.5630.3750.1340.2580.3750.2580.6250.50.75
66.6250.4320.1340.280.4320.280.7190.5620.864
88.6250.50.1480.8120.2770.3220.4060.50.3220.250.5940.9060.7190.875
1010.750.5940.16510.3070.3650.50.50.3650.250.7191.1250.8441
1212.750.6880.181.1250.330.4060.5620.50.3750.250.8441.31211
14140.750.251.250.3750.4380.5940.50.3750.3120.9381.4061.094
16160.8440.251.4380.3750.50.6560.50.3750.3121.0311.5941.219
18180.9380.251.5620.4380.5620.750.50.3750.3121.1561.7811.375
20201.0310.251.750.50.5940.8120.50.3750.3751.2811.9691.5
22220.250.50.375
24241.2190.252.0620.5620.6880.9690.50.3750.3751.5312.3441.812
26260.50.375
30300.3120.6250.50.3750.5
36360.3120.6250.750.50.3750.5
40400.50.375
42420.50.375
48480.50.375
Thermal Conductivity 13 - 30 W/(m·K)

Duplex stainless steels flanges high chromium content, which protects against corrosion, produces embrittlement at temperatures above 300°C.

Duplex flanges are more ductile than ferritic and martensitic grades at low temperatures. Duplex 2205 Flanges may withstand temperatures as low as -50°C.

Due to their high strength, duplex stainless steels flanges are difficult to process. Cutting 2205 Alloy Flanges, for example, is about 20% slower than machining 304.

The following guidelines will assist you in improving your machining:

  • The cutting edges must remain razor-sharp. Excessive work hardening is caused by dull edges.
  • Light cuts should be made, but they should be deep enough to prevent work hardening by riding on the material's surface.
  • Chip breakers should be used to help keep swarf out of the way of the job.

Alloy 2205 Lap Joint Flange Dimensions

Size in InchSize in mmFlange Thick.Bolt Size UNCLapped Thick.Lapped IDISO Stud SizeLapped RadiusNo of BoltsLapped Thick.Outer DiameterMachine Bolt LengthRF Stud LengthHole SizePCDWeight in kg
BCDGAE
1/215301/21622.9M143411.29050555/860.30.8
3/420381/21628.2M143412.710050655/869.90.9
125491/21734.9M143414.311055655/879.40.9
1 1/432591/22143.7M145415.911555705/888.91.4
1 1/240651/22250M146417.512565705/898.41.4
250785/82562.5M168419.115070853/4120.72.3
2 1/265905/82975.4M168422.318075903/4139.73.2
3801085/83091.4M1610423.919075903/4152.43.7
3 1/2901225/832104.1M1611823.921575903/4177.85
41001355/833116.8M1611823.923075903/4190.55.9
51251643/436144.4M2011823.925585957/8215.96.8
61501923/440171.4M2013825.4280851007/8241.38.6
82002463/444222.2M2013828.6345901107/8298.513.7
102503057/849277.4M24131230.2405100115136219.5
123003657/856328.2M24131231.84851001201431.829
14350400179360.2M271312355351151351 1/8476.341
16400457187411.2M27131636.65951151351 1/8539.854
184505051 1/897462.3M30131639.76351251451 1/4577.959
205005591 1/8103514.4M30132042.97001401601 1/463575
246006631 1/4111616M33132047.98151501701 3/8749.3100
Nominal Pipe Size
(inches)		Class 300
Dia of
Flanges
(inches)		No.
of
Bolts		Dia of
Bolts
(inches)		Dia of
Bolt Holes
(inches)		Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2983/40.887-1/4
41083/40.887-7/8
51183/40.889-1/4
612-1/2123/40.8810-5/8
815127/8113
1017-1/21611.1215-1/4
1220-1/2161-1/81.2517-3/4
1423201-1/81.2520-1/4
1625-1/2201-1/41.3822-1/2
1828241-1/41.3824-3/4
2030-1/2241-1/41.3827
2436241-1/21.6232
Nominal Pipe Size
NPS
(in)		Class 600
Dia of
Flange
(in)		No.
of
Bolts		Dia of
Bolts
(in)		Dia of
Bolt Holes
(in)		Bolt
Circle
(in)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2987/817-1/4
410-3/487/818-1/2
513811.1210-1/2
6141211.1211-1/2
816-1/2121-1/81.2513-3/4
1020161-1/41.3817
1222201-1/41.3819-1/4
1423-3/4201-3/81.520-3/4
1627201-1/21.6223-3/4
1829-1/4201-5/81.7525-3/4
2032241-5/81.7528-1/2
2437241-7/8233
Nominal Pipe Size
NPS
(in)		Class 600
Dia of
Flange
(in)		No.
of
Bolts		Dia of
Bolts
(in)		Dia of
Bolt Holes
(in)		Bolt
Circle
(in)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2987/817-1/4
410-3/487/818-1/2
513811.1210-1/2
6141211.1211-1/2
816-1/2121-1/81.2513-3/4
1020161-1/41.3817
1222201-1/41.3819-1/4
1423-3/4201-3/81.520-3/4
1627201-1/21.6223-3/4
1829-1/4201-5/81.7525-3/4
2032241-5/81.7528-1/2
2437241-7/8233
Nominal Pipe Size
NPS
(in)		Class 900
Dia of
Flange
(in)		No.
of
Bolts		Dia of
Bolts
(in)		Dia of
Bolt Holes
(in)		Bolt
Circle
(in)
1/24-3/443/40.883-1/4
3/45-1/843/40.883-1/2
15-7/847/814
1-1/46-1/447/814-3/8
1-1/27411.124-7/8
28-1/287/816-1/2
2-1/29-5/8811.127-1/2
39-1/287/817-1/2
411-1/281-1/81.259-1/4
513-3/481-1/41.3811
615121-1/81.2512-1/2
818-1/2121-3/81.515-1/2
1021-1/2161-3/81.518-1/2
1224201-3/81.521
1425-1/4201-1/21.6222
1627-3/4201-5/81.7524-1/2
1831201-7/8227
2033-3/42022.1229-1/2
2441202-1/22.6235-1/2
Nominal Pipe Size
(in)		Class 1500
Dia of
Flange
(in)		No.
of
Bolts		Dia of
Bolts
(in)		Dia of
Bolt Holes
(in)		Bolt
Circle
(in)
1/24-3/443/40.883-1/4
3/45-1/843/40.883-1/2
15-7/847/814
1-1/46-1/447/814-3/8
1-1/27411.124-7/8
28-1/287/816-1/2
2-1/29-5/8811.127-1/2
310-1/281-1/81.258
412-1/481-1/41.389-1/2
514-3/481-1/21.6211-1/2
615-1/2121-3/81.512-1/2
819121-5/81.7515-1/2
1023121-7/8219
1226-1/21622.1222-1/2
1429-1/2162-1/42.3825
1632-1/2162-1/22.6227-3/4
1836162-3/42.8830-1/2
2038-3/41633.1232-3/4
2446163-1/23.6239
Nominal Pipe Size
(in)		Class 2500
Dia of
Flange
(in)		No.
of
Bolts		Dia of
Bolts
(in)		Dia of
Bolt Holes
(in)		Bolt
Circle
(in)
1/25-1/443/40.883-1/2
3/45-1/243/40.883-3/4
16-1/447/814-1/4
1-1/47-1/4411.125-1/8
1-1/2841-1/81.255-3/4
29-1/4811.126-3/4
2-1/210-1/281-1/81.257-3/4
31281-1/41.389
41481-1/21.6210-3/4
516-1/281-3/41.8812-3/4
619822.1214-1/2
821-3/41222.1217-1/4
1026-1/2122-1/22.6221-1/4
1230122-3/42.8824-3/8

If the gasket for the Alloy 2205 flanges isn't already known or provided by the piping provider, choose one. Align the SS 2205 flanges as needed. If you're going to utilize gaskets, be sure they're in the right place. Duplex Flanges and gaskets should be brought together. Check the ASTM A182 Duplex Steel flange alignment once more. Place the bolts in place. Ensure that the DIN 1.4462 flange bolts are securely fastened. Check that the 2205 Duplex Steel flanges are centered and that the mating surfaces of the Duplex flanges are aligned. Check to see if the Stainless Steel Type 2205 flange bolts are overtorqued.

  • ASME B16.5
  • ASME B16.47
  • BS EN 1092-1
  • API 6A (wellhead equipment)
  • ASME B16.36 (orifice flanges)

Duplex Steel Flange Leakage

The following equations are used to translate the axial force (F) and bending moment (M) on the Duplex flange into equivalent pressure (Pe).

  • Equivalent Pressure for Axial force, Pe1=4F/ΠG2
  • Equivalent Pressure for bending moment, Pe2=16M/ΠG3
  • Here G=diameter at location of gasket load reaction =(Gasket OD+ID)/2 when bo<=6 mm  =(Gasket OD-2b) when bo>6 mm. Here bo=basic gasket seating width as given in table 2-5.2  of ASME sec VIII 

Duplex 2205 Flange Manufacturing Process

Duplex Flanges have a 22 percent chromium content, whereas super duplex Flanges have a 25 percent chromium content. The level of pitting corrosion resistance is raised by increasing the chromium concentration. However, in order to maintain a favorable balance between austenitic and ferritic microstructures, the concentration of nickel and other elements must be increased, which raises the cost.

Flanges Material



Pipe Fittings Material



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