Stainless Steel Weld Neck Flange

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Stainless Steel Weld Neck Flange The ASME B16.5 Weld Neck Flange is a welding-type flange cast or forged integrally with the tapered neck. It is then buttwelded to the piping system. The ASTM A182 SS WNRF Flange is made of austenitic steel consisting of 18% chromium and 8% nickel, and it is this composition that makes the flange strong and highly resistive to corrosion. We also manufacture flanges made of different steel grades like Stainless Steel 316L Weld Neck Flange, which have low carbon content and are among the most commonly used flanges around the world. We also produce Grade 321 Long Weld Neck Flange where the composition has titanium which prevents carbide precipitation during welding. The weld neck flanges are joined with one another by bolts and to the piping system through welding or threading. We have a huge Stainless Steel Weld Neck Flange stock, which is crafted using top-quality stainless steel. The ASTM A182 F304 SS Weld Neck Flange is ideal to be used in high and low temperatures, and they come in different shapes, with each serving different purposes.

stainless-steel-weld-neck-flange
Stainless Steel Weld Neck Flange

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Weld Neck Flange Specification

Specification Stainless Steel Weld Neck Flange
Weld Neck Flange Uses Stainless Steel Weld Neck Flange Mainly Used High And Medium Pressure Pipes Connecting.
EN Standard 6Bar/ 10Bar/ 16Bar/ 25Bar/ 40Bar
DIN Standard PN6/ PN10/ PN16/ PN25/ PN40/ PN64
JIS Standard 5K/ 10K/ 16K 20K/ 30K/ 40K/ 63K
Size Chart 1/2 Inch to 36 Inch, (Customized Up to 48")
Thickness Sch 10S To SCH 120
Other Standard B16.47 Series A & B/ B16.48, BS4504/ GOST
UNI Standard 6 Bar/ 10 Bar/ 16 Bar/ 25 Bar/ 40 Bar
Supporting Material Gasket/ Ring Joint/ Flange Bolts
ASME B16.5 Weld Neck Flange Face Types Raised Face Weld Neck Flanges
Reducing Weld Neck Flanges
Flat Face Weld Neck Flanges
Weld Neck Orifice Flanges
Rtj Weld Neck Flanges
Dimensions ASME B16.47 Series A And B
ASME B16.5
EN 1092-1
ASA
API-605
AWWA C207
MSS SP44
EN 1092-2
Test Certificates EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Production Technique Forged/ Heat treated and machined
Manufacturer of Forged/ Threaded/ Screwed / Plate
Manufacturer Pressure Class Class 150 (lb) up to 24"
Class 300 (lb) up to 20"
Class 600 (lb) up to 20"
Class 900 (lb) up to 16"
Class 1500 (lb) up to 10"
Class 2500 (lb) up to 8"
Flange Test Hydrostatic testing machine/ UI trasonic flaw detector/ X-ray detector/ Direct-reading Spectrograph/ Magnetic particle detector
Flange Equipment Pushing Machine/ electric bevelling machine/ Press machine/ Bending machine/ Sand-blasting machine etc
Coating Anti-rust Paint/ Zinc Plated/ Oil Black Paint/ Yellow Transparent/ Cold and Hot Dip Galvanized
Application Bitumen upgraders
Heavy oil refineries.
Nuclear power (mostly seamless).
Petrochemicals and acids.

Types Of Stainless Steel Weld Neck Flange

ss-weld-neck-flange
SS Weld Neck Flange
lwnrf-flange
LWNRF Flange
wnrf-flange
WNRF Flange
welding-neck-flange
Welding Neck Flange
stainless-steel-long-weld-neck-flange
Stainless Steel Long Weld Neck Flange
raised-face-weld-neck-flange
Raised Face Weld Neck Flange
flat-face-weld-neck-flange
Flat Face Weld Neck Flange
reducing-weld-neck-flange
Reducing Weld Neck Flange
weld-neck-orifice-flange
Weld Neck Orifice Flange
slip-on-flange-weldings
Slip On Flange Welding
long-welding-neck
Long Welding Neck
weld-neck-pipe-flanges
Weld Neck Pipe Flanges

Types Of Carbon Steel Weld Neck Flange

cs-weld-neck-flange
CS Weld Neck Flange
flange-wn-rf
Flange Wn Rf
carbon-steel-weld-neck-flange
Carbon Steel Weld Neck Flange
wn-flange
Wn Flange
carbon-steel-long-weld-neck-flanges
Carbon Steel Long Weld Neck Flanges
cs-weld-neck-flanges
CS Weld Neck Flange
4-inch-weld-neck-flange
4 Inch Weld Neck Flange
12-inch-weld-neck-flanges
12 Inch Weld Neck Flanges
weldneck-flange
Weldneck Flange
neck-flange
Neck Flange
well-neck-flange
Well Neck Flange
8-inch-weld-neck-flange
8 Inch Weld Neck Flange

Other Materials Of ASME B16.5 Weld Neck Flange

duplex-weld-neck-flange
Duplex Weld Neck Flange
super-duplex-weld-neck-flanges
Super Duplex Weld Neck Flanges
titanium-weld-neck-flanges
Titanium Weld Neck Flanges
mild-steel-weld-neck-flange
Mild Steel Weld Neck Flange
nickel-alloy-weld-neck-flanges
Nickel Alloy Weld Neck Flanges
copper-weld-neck-flanges
Copper Weld Neck Flanges
inconel-weld-neck-flanges
Inconel Weld Neck Flanges
ductile-iron-weld-neck-flanges
Ductile Iron Weld Neck Flanges
aluminum-weld-neck-flanges
Aluminum Weld Neck Flanges
alloy-steel-weld-neck-flanges
Alloy Steel Weld Neck Flanges
astm-a350-lf2-weld-neck-flanges
ASTM A350 LF2 Weld Neck Flanges
uns-s31803-weld-neck-flanges
UNS S31803 Weld Neck Flanges

Weld Neck Flange Material Grade

Brass Weld Neck Flange 3602 / 2604 / H59 / H62 / etc.
Inconel Weld Neck Flange ASTM B564 / ASME SB564, Inconel 600/ 601/ 625/ 718/ 783/ 690/ x750 Weld Neck Flange
Carbon Steel Weld Neck Flange ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel Weld Neck Flange ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8/ CF3/ CF8M/ CF3M/ DIN 1.4301/ DIN 1.4306/ DIN 1.4401/ DIN 1.4404/ DIN 1.4308/ DIN 1.4408/ DIN 1.4306/ DIN 1.4409
Alloy Steel Weld Neck Flange ASTM A182 / ASME SA182 F5/ F9/ F11/ F12/ F22/ F91
Titanium Weld Neck Flange ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2/ Titanium Gr. 4/ Titanium Gr. 5/ Titanium Gr. 7
ASTM R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 |R56400/GR.5
Hastelloy Weld Neck Flange ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276)/ C22 (UNS N06022)/ C4/ C2000/ B2/ B3/ X Flanges
Monel Weld Neck Flange ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400)/ Monel 500 (UNS No. N05500)
Copper Weld Neck Flange T1, T2, C10100/ C10200/ C10300/ C10400/ C10500/ C10700/ C10800/ C10910/C10920/ TP1/ TP2/ C10930/ C11000/ C11300/ C11400/ C11500/ C11600/ C12000/C12200/ C12300/ TU1/ TU2/ C12500/ C14200/ C14420/ C14500/ C14510/ C14520/ C14530/ C17200/ C19200/ C21000/ C23000/ C26000/ C27000/ C27400/ C28000/ C33000/ C33200/ C37000/ C44300/ C44400/ C44500/ C60800/ C63020/ C68700/ C70400/ C70600/ C70620/ C71000/ C71500/ C71520/ C71640 etc
Copper Nickel Weld Neck Flange ASTM / ASME SB 61 / 62 / 151 / 152/ Copper Nickel 90/10 (C70600 )/ Cupro Nickel 70/30 (C71500)/ UNS C71640
Alloy 20 Weld Neck Flange ASTM B462 / ASME SB462/ Carpenter® 20 Alloy/ Alloy 20Cb-3
Aluminium Weld Neck Flange 5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel Weld Neck Flange ASTM B564 / ASME SB564, Nickel 200/ Nickel 201/ Nickel 205/ Nickel 205LC
Duplex Weld Neck Flange S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex Weld Neck Flange S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy Weld Neck Flange ASTM B564 / ASME SB564, Incoloy 800/ 800H/ 800HT (UNS N08800)/ 825 (UNS N08825)/ 925 Flanges
254 Smo Weld Neck Flange ASTM A182 / ASME SA182, SMO 254/6Mo/ UNS S31254/ DIN 1.4547
Nimonic Weld Neck Flange Nimonic 75/ Nimonic 80A/ Nimonic 90
Other Weld Neck Flange material Tin bronze/ Alumunum bronze/ Lead bronze

Long Weld Neck Flange Standard Dimensions

long-weld-neck-flange-standard-dimensions

PN16 WNRF Flange Dimensions

pn16-wnrf-flange-dimensions
Diameter Of WNRF WNRF Flange Weld Neck Raised face (RF) Screws Weight In
Kilogram
(d1) (k) (D) (b) (h1) (d3) (s) (r) (h2) (d4) (f) (d2) (Thread) (Bolts holes) (Kilogram)
15 21,3 65 95 16 38 32 2,00 4 6 45 2 14 M12 4 0,678
20 26,9 75 105 18 40 40 2,30 4 6 58 2 14 M12 4 0,768
25 33,7 85 115 18 40 46 2,60 4 6 68 2 14 M12 4 1,090
32 42,4 100 140 18 42 56 2,60 6 6 78 2 18 M16 4 1,300
40 48,3 110 150 18 45 64 2,60 6 7 88 3 18 M16 4 1,910
50 60,3 125 165 18 45 74 2,9 6 8 102 3 18 M16 4 2,530
65 76,1 145 185 18 45 92 2,9 6 10 122 3 18 M16 4 3,030
80 88,9 160 200 20 50 105 3,2 6 10 138 3 18 M16 8 3,920
100 114,3 180 220 20 52 131 3,6 8 12 158 3 18 M16 8 4,620
125 139,7 210 250 22 55 156 4,0 8 12 188 3 18 M16 8 6,300
150 168,3 240 285 22 55 184 4,5 10 12 212 3 22 M20 8 7,810
200 219,1 295 340 24 62 235 6,30 10 16 268 3 22 M20 12 11,500
250 273,0 355 405 26 70 292 6,30 12 16 320 3 26 M24 12 16,700
300 323,9 410 460 28 78 344 7,10 12 16 378 4 26 M24 12 22,100
350 355,6 470 520 30 82 390 8,00 12 16 438 4 26 M24 16 32,800
400 406,4 525 580 32 85 445 8,00 12 16 490 4 30 M27 16 41,100
450 457,0 585 640 34 83 490 8,00 12 16 550 4 30 M27 20 48,500
500 508 650 715,0 36 84 548 8,0 12 16 610 4 33 M30 20 63,400
600 610 770 840,0 40 88 670 10,0 12 18 725 5 36 M33 20 96,000
700 711 840 910,0 40 104 755 10,0 12 18 795 5 36 M33 24 96,500
800 813 950 1025,0 41 108 855 12,5 12 20 900 5 39 M36 24 122,000
900 914 1050 1125,0 48 118 955 12,5 12 20 1000 5 39 M36 28 155,000
1000 1016 1170 1255,0 59 137 1058 12,5 16 22 1115 5 42 M39 28 233,000
1200 1219 1390 1485,0 78 160 1262 14,2 16 30 1330 5 48 M45 32 390,000
1400 1422 1590 1685,0 84 177 1465 16,0 16 30 1530 5 48 M45 36 495,000
1600 1626 1820 1930,0 102 204 1668 17,5 16 35 1750 5 56 M52 40 760,000
1800 1829 2020 2130,0 110 218 1870 20,0 16 35 1950 5 56 M52 44 929,000
2000 2032 2230 2345,0 124 238 2072 22,0 16 40 2150 5 62 M56 48 1.185,000

Long Weld Neck Nozzle Thickness Chart

Normal Size Of Steel Pipe Outer Diameter (O.D.) 10 Schedule 20 Schedule 30 Schedule STD Wall 40 Schedule 60 Schedule EXT Hvy 80 Schedule 100 Schedule 120 Schedule 140 Schedule 160 Schedule XX Hvy
½ 0.84 0.083 ... ... 0.109 0.109 ... 0.147 0.147 ... ... ... 0.188 0.294
¾ 1.05 0.083 ... ... 0.113 0.113 ... 0.154 0.154 ... ... ... 0.219 0.308
1 1.315 0.109 ... ... 0.133 0.133 ... 0.179 0.179 ... ... ... 0.25 0.358
1 ¼ 1.66 0.109 ... ... 0.14 0.14 ... 0.191 0.191 ... ... ... 0.25 0.382
1 ½ 1.9 0.109 ... ... 0.145 0.145 ... 0.2 0.2 ... ... ... 0.281 0.4
2 2.375 0.109 ... ... 0.154 0.154 ... 0.218 0.218 ... ... ... 0.344 0.436
2 ½ 2.875 0.12 ... ... 0.203 0.203 ... 0.276 0.276 ... ... ... 0.375 0.552
3 3.5 0.12 - - 0.216 0.216 - 0.3 0.3 - - - 0.438 0.6
3 ½ 4 0.12 - - 0.226 0.226 - 0.318 0.318 - - - - 0.636
4 4.5 0.12 - - 0.237 0.237 - 0.337 0.337 - 0.438 - 0.531 0.674
5 5.563 0.134 - - 0.258 0.258 - 0.375 0.375 - 0.5 - 0.625 0.75
6 6.625 0.134 - - 0.28 0.28 - 0.432 0.432 - 0.562 - 0.719 0.864
8 8.625 0.148 0.25 0.277 0.322 0.322 0.406 0.5 0.5 0.594 0.719 0.812 0.906 0.875
10 10.75 0.165 0.25 0.307 0.365 0.365 0.5 0.5 0.594 0.719 0.844 1 1.125 1
12 12.75 0.18 0.25 0.33 0.375 0.406 0.562 0.5 0.688 0.844 1 1.125 1.312 1
14 14 0.25 0.312 0.375 0.375 0.438 0.594 0.5 0.75 0.938 1.094 1.25 1.406 -
16 16 0.25 0.312 0.375 0.375 0.5 0.656 0.5 0.844 1.031 1.219 1.438 1.594 -
18 18 0.25 0.312 0.438 0.375 0.562 0.75 0.5 0.938 1.156 1.375 1.562 1.781 -
20 20 0.25 0.375 0.5 0.375 0.594 0.812 0.5 1.031 1.281 1.5 1.75 1.969 -
22 22 0.25 - - 0.375 - - 0.5 - - - - - -
24 24 0.25 0.375 0.562 0.375 0.688 0.969 0.5 1.219 1.531 1.812 2.062 2.344 -
26 26 - - - 0.375 - - 0.5 - - - - - -
30 30 0.312 0.5 0.625 0.375 - - 0.5 - - - - - -

Heavy Barrel Flange Dimensions

heavy-barrel-flange-dimensions
Normal Pipe Size O.D.

of

WNRF Flange

(A)

 Diameter

of

(RF) Of

(B)

 Thickness

of

(WN Flange)


C

 Bore

of

Diameter


(D)

 Diameter

of Hub

at Base


(J)

 Length

of

(Hub)


K

 Nut

Stop

Dia.


NS

 Nut

Relief

Dia.


NR

 Nut

Relief

Length


NL

 Nunber

of

Bolt

Holes

 Diamete

of

Bolts

Holes (B.H.)

 B.C.

Diameter


P

Weight In KG
1/2 3 1/2 1 3/8 7/16 0.55 1 1/4 9 1 1/2 1 1/4 3/4 4 5/8 2 3/8 5
3/4 3 7/8 1 11/16 1/2 0.74 1 5/8 9 1 7/8 1 5/8 3/4 4 5/8 2 3/4 7
1 4 1/4 2 9/16 0.96 2 9 2 1/ 4 2 3/4 4 5/8 3 1/8 10
1 1/4 4 5/8 2 1/2 5/8 1.28 2 3/8 9 2 5/8 2 3/8 3/4 4 5/8 3 1/2 12
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 3 2 5/8 3/4 4 5/8 3 7/8 16
2 6 3 5/8 3/4 1.94 3 1/4 9 3 11/ 16 3 1/16 7/8 4 3/4 4 3/4 23
2 1/2 7 4 1/8 7/8 2.32 3 3/4 9 4 7/16 3 3/4 7/8 4 3/4 5 1/2 34
3 7 1/2 5 15/16 2.90 4 1/4 9 4 15/15 4 1/4 7/8 4 3/4 6 38
3 1/2 8 1/2 5 1/2 15/16 3.36 4 7/8 9 5 15/16 4 7/8 7/8 8 3/4 7 55
4 9 6 3/16 15/16 3.83 5 1/2 12 6 7/16 5 1/2 7/8 8 3/4 7 1/2 78
5 10 7 5/16 15/16 4.81 6 1/2 12 7 1/2 6 1/2 1 8 7/8 8 1/2 87
6 11 8 1/2 1 5.76 7 3/4 12 8 1/4 7 3/4 1 8 7/8 9 1/2 103
8 13 1/2 10 5/8 1 1/8 7.62 9 3/4 12 10 1/2 9 3/4 1 8 7/8 11 3/4 157
10 16 12 3/4 1 3/16 9.56 12 12 12 7/8 12 1 1/8 12 1 14 1/4 214
12 19 15 1 1/4 11.38 14 3/8 12 15 9/16 14 3/8 1 1/2 12 1 17 329
14 21 16 1/4 1 3/8 14.00 16 12 17 1/8 16 1 1/4 12 1 1/8 18 3/4 296
16 23 1/2 18 1/2 1 7/16 16.00 18 12 19 5/8 18 1 1/4 16 1 1/8 21 1/4 388
18 25 21 1 9/16 18.00 20 12 20 15/16 20 1 3/8 16 1 1/4 22 3/4 362
20 27 1/2 23 1 11/16 20.00 22 12 23 3/16 22 1 3/8 20 1 1/4 25 434
22 - - - - - - - - - - - - -
24 32 27 1/4 1 7/8 24.00 26 1/4 12 27 1/2 26 1/4 1 1/2 20 1 3/8 29 1/2 574

Raised Face Long Weld Neck Flange Dimensions

raised-face-long-weld-neck-flange-dimensions
Normal Pipe Size O.D. of Flange (A) Diameter of R F (B) Thicknessof Flange
(C) 		Diameterof Bore
(D) 		Diameterof Hub at Base
(J) 		Lengthof Hub
(K) 		Nunberof Bolt Hole (B.H.) Diameteof Bolt Holes BoltC.D.
P 		Weight In Kilogram
1/2 3 1/2 1 3/8 7/16 0.50 1 1/4 9 4 5/8 2 3/8 3
3/4 3 7/8 1 11/16 1/2 0.75 1 5/8 9 4 5/8 2 3/4 5
1 4 1/4 2 9/16 1.00 2 9 4 5/8 3 1/8 8
1 1/4 4 5/8 2 1/2 5/8 1.25 2 3/8 9 4 5/8 3 1/2 10
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 4 5/8 3 7/8 12
2 6 3 5/8 3/4 2.00 3 1/4 9 4 3/4 4 3/4 16
2 1/2 7 4 1/8 7/8 2.50 3 3/4 9 4 3/4 5 1/2 21
3 7 1/2 5 15/16 3.00 4 1/4 9 4 3/4 6 24
3 1/2 8 1/2 5 1/2 15/16 3.60 4 7/8 9 8 3/4 7 31
4 9 6 3/16 15/16 4.00 5 1/2 12 8 3/4 7 1/2 47
5 10 7 5/16 15/16 5.00 6 1/2 12 8 7/8 8 1/2 57
6 11 8 1/2 1 6.00 7 3/4 12 8 7/8 9 1/2 77
8 13 1/2 10 5/8 1 1/8 8.00 9 3/4 12 8 7/8 11 3/4 103
10 16 12 3/4 1 3/16 10.00 12 12 12 1 14 1/4 150
12 19 15 1 1/4 12.00 14 3/8 12 12 1 17 215
14 21 16 1/4 1 3/8 14.00 16 12 12 1 1/8 18 3/4 221
16 23 1/2 18 1/2 1 7/16 16.00 18 12 16 1 1/8 21 1/4 254
18 25 21 1 9/16 18.00 20 12 16 1 1/4 22 3/4 276

Stainless Steel Weld Neck Flange Dimensions

stainless-steel-weld-neck-flange-dimensions

Class 150 Weld Neck Flange Dimensions

Normal Size Of Steel Pipe in Inch NPS (Normal Pipe Size) Size in Millimeter O.D. Wall Thickness Hub Outer Diameter Weld Neck Outer Diameter ASME B16.5 WNRF Length WNRF Bore Daimeter Raised Face Diameter Height Of Raised Face PCD Face Of WNRF
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)
1/2 15 90 9.6 30 21.3 46 - 34.9 2 60.3 1.6
3/4 20 100 11.2 38 26.7 51 42.9 2 69.9 1.6
1 25 110 12.7 49 33.4 54 50.8 2 79.4 1.6
1 1/4 32 115 14.3 59 42.2 56 63.5 2 88.9 1.6
1 1/2 40 125 15.9 65 48.3 60 73 2 98.4 1.6
2 50 150 17.5 78 60.3 62 92.1 2 120.7 1.6
2 1/2 65 180 20.7 90 73 68 104.8 2 139.7 1.6
3 80 190 22.3 108 88.9 68 127 2 152.4 1.6
3 1/2 90 215 22.3 122 101.6 70 139.7 2 177.8 1.6
4 100 230 22.3 135 114.3 75 157.2 2 190.5 1.6
5 125 255 22.3 164 141.3 87 185.7 2 215.9 1.6
6 150 280 23.9 192 168.3 87 215.9 2 241.3 1.6
8 200 345 27 246 219.1 100 269.9 2 298.5 1.6
10 250 405 28.6 305 273 100 323.8 2 362 1.6
12 300 485 30.2 365 323.8 113 381 2 431.8 1.6
14 350 535 33.4 400 355.6 125 412.8 2 476.3 1.6
16 400 595 35 457 406.4 125 469.9 2 539.8 1.6
18 450 635 38.1 505 457.2 138 533.4 2 577.9 1.6
20 500 700 41.3 559 508 143 584.2 2 635 1.6
24 600 815 46.1 663 610 151 692.2 2 749.3 1.6

Class 300 Weld Neck Flange Dimensions

Normal Size Of Steel Pipe in Inch Normal Size Of Steel Pipe In Millimeter O.D. Wall Thickness Outer Daimeter Of Hub Outer Daimeter Of WNRF ASME B16.5 WNRF Length WNRF Bore Daimeter Raised Face Diameter Height Of Raised Face PCD Face Of WNRF
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)
1/2 15 95 12.7 38 21.3 51 Refer Note 34.9 2 66.7 1.6
3/4 20 115 14.3 48 26.7 56 42.9 2 82.6 1.6
1 25 125 15.9 54 33.4 60 50.8 2 88.9 1.6
1 1/4 32 135 17.5 64 42.2 64 63.5 2 98.4 1.6
1 1/2 40 155 19.1 70 48.3 67 73 2 114.3 1.6
2 50 165 20.7 84 60.3 68 92.1 2 127 1.6
2 1/2 65 190 23.9 100 73 75 104.8 2 149.2 1.6
3 80 210 27 117 88.9 78 127 2 168.3 1.6
3 1/2 90 230 28.6 133 101.6 79 139.7 2 184.2 1.6
4 100 255 30.2 146 114.3 84 157.2 2 200 1.6
5 125 280 33.4 178 141.3 97 185.7 2 235 1.6
6 150 320 35 206 168.3 97 215.9 2 269.9 1.6
8 200 380 39.7 260 219.1 110 269.9 2 330.2 1.6
10 250 445 46.1 321 273 116 323.8 2 387.4 1.6
12 300 520 49.3 375 323.8 129 381 2 450.8 1.6
14 350 585 52.4 425 355.6 141 412.8 2 514.4 1.6
16 400 650 55.6 483 406.4 144 469.9 2 571.5 1.6
18 450 710 58.8 533 457 157 533.4 2 628.6 1.6
20 500 775 62 587 508 160 584.2 2 685.8 1.6
24 600 915 68.3 702 610 167 692.2 2 812.8 1.6

Class 400 Weld Neck Flange Dimensions

Normal Size Of Steel Pipe in Inch Normal Size Of Steel Pipe In Millimeter O.D. Wall Thickness Outer Daimeter Of Hub Outer Daimeter Of WNRF ASME B16.5 WNRF Length WNRF Bore Daimeter Raised Face Diameter Height Of Raised Face PCD Face Of WNRF
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)
1/2 15 95 14.3 38 21.3 52 - 34.9 7 66.7 1.6
3/4 20 115 15.9 48 26.7 57 42.9 7 82.6 1.6
1 25 125 17.5 54 33.4 62 50.8 7 88.9 1.6
1 1/4 32 135 20.7 64 42.2 67 63.5 7 98.4 1.6
1 1/2 40 155 22.3 70 48.3 70 73 7 114.3 1.6
2 50 165 25.4 84 60.3 73 92.1 7 127 1.6
2 1/2 65 190 28.6 100 73 79 104.8 7 149.2 1.6
3 80 210 31.8 117 88.9 83 127 7 168.3 1.6
3 1/2 90 230 35 133 101.6 86 139.7 7 184.2 1.6
4 100 255 35 146 114.3 89 157.2 7 200 1.6
5 125 280 38.1 178 141.3 102 185.7 7 235 1.6
6 150 320 41.3 206 168.3 103 215.9 7 269.9 1.6
8 200 380 47.7 260 219.1 117 269.9 7 330 1.6
10 250 445 54 321 273 124 323.8 7 387.4 1.6
12 300 520 57.2 375 323.8 137 381 7 450.8 1.6
14 350 585 60.4 425 355.6 149 412.8 7 514.4 1.6
16 400 650 63.5 483 406.4 152 469.9 7 571.5 1.6
18 450 710 66.7 533 457 165 533.4 7 628.6 1.6
20 500 775 69.9 587 508 168 584.2 7 685.8 1.6
24 600 915 76.2 702 610 175 692.2 7 812.8 1.6

Class 600 Weld Neck Flange Dimensions

Normal Size Of Steel Pipe in Inch Normal Size Of Steel Pipe In Millimeter O.D. Wall Thickness Outer Daimeter Of Hub Outer Daimeter Of WNRF ASME B16.5 WNRF Length WNRF Bore Daimeter Raised Face Diameter Height Of Raised Face PCD Face Of WNRF
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)
1/2 15 95 14.3 38 21.3 52 - 34.9 7 66.7 1.6
3/4 20 115 15.9 48 26.7 57 42.9 7 82.6 1.6
1 25 125 17.5 54 33.4 62 50.8 7 88.9 1.6
1 1/4 32 135 20.7 64 42.2 67 63.5 7 98.4 1.6
1 1/2 40 155 22.3 70 48.3 70 73 7 114.3 1.6
2 50 165 25.4 84 60.3 73 92.1 7 127 1.6
2 1/2 65 190 28.6 100 73 79 104.8 7 149.2 1.6
3 80 210 31.8 117 88.9 83 127 7 168.3 1.6
3 1/2 90 230 35 133 101.6 86 139.7 7 184.2 1.6
4 100 275 38.1 152 114.3 102 157.2 7 215.9 1.6
5 125 330 44.5 189 141.3 114 185.7 7 266.7 1.6
6 150 355 47.7 222 168.3 117 215.9 7 292.1 1.6
8 200 420 55.6 273 219.1 133 269.9 7 349.2 1.6
10 250 510 63.5 343 273 152 323.8 7 431.8 1.6
12 300 560 66.7 400 323.8 156 381 7 489 1.6
14 350 605 69.9 432 355.6 165 412.8 7 527 1.6
16 400 685 76.2 495 406.4 178 469.9 7 603.2 1.6
18 450 745 82.6 546 457 184 533.4 7 654 1.6
20 500 815 88.9 610 508 190 584.2 7 723.9 1.6
24 600 940 101.6 718 610 203 692.2 7 838.2 1.6

Class 900 Weld Neck Flange Dimensions

Normal Size Of Steel Pipe in Inch Normal Size Of Steel Pipe In Millimeter O.D. Wall Thickness Outer Daimeter Of Hub Outer Daimeter Of WNRF ASME B16.5 WNRF Length WNRF Bore Daimeter Raised Face Diameter Height Of Raised Face PCD Face Of WNRF
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)
1/2 15 120 22.3 38 21.3 60 Refer Note 34.9 7 82.6 1.6
3/4 20 130 25.4 44 26.7 70 42.9 7 88.9 1.6
1 25 150 28.6 52 33.4 73 50.8 7 101.6 1.6
1 1/4 32 160 28.6 64 42.2 73 63.5 7 111.1 1.6
1 1/2 40 180 31.8 70 48.3 83 73 7 123.8 1.6
2 50 215 38.1 105 60.3 102 92.1 7 165.1 1.6
2 1/2 65 245 41.3 124 73 105 104.8 7 190.5 1.6
3 80 240 38.1 127 88.9 102 127 7 190.5 1.6
4 100 290 44.5 159 114.3 114 157.2 7 235 1.6
5 125 350 50.8 190 141.3 127 185.7 7 279.4 1.6
6 150 380 55.6 235 168.3 140 215.9 7 317.5 1.6
8 200 470 63.5 298 219.1 162 269.9 7 393.7 1.6
10 250 545 69.9 368 273 184 323.8 7 469.9 1.6
12 300 610 79.4 419 323.8 200 381 7 533.4 1.6
14 350 640 85.8 451 355.6 213 412.8 7 558.8 1.6
16 400 705 88.9 508 406.4 216 469.9 7 616 1.6
18 450 785 101.6 565 457 229 533.4 7 685.8 1.6
20 500 855 108 622 508 248 584.2 7 749.3 1.6
24 600 1040 139.7 749 610 292 692.2 7 901.7 1.6

Class 1500 Weld Neck Flange Dimensions

Size in Inch Normal Size Of Steel Pipe In Millimeter O.D. Wall Thickness Outer Daimeter Of Hub Outer Daimeter Of WNRF ASME B16.5 WNRF Length WNRF Bore Daimeter Raised Face Diameter Height Of Raised Face PCD Face Of WNRF
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)
1/2 15 120 22.3 38 21.3 60 - 34.9 7 82.6 1.6
3/4 20 130 25.4 44 26.7 70 42.9 7 88.9 1.6
1 25 150 28.6 52 33.4 73 50.8 7 101.6 1.6
1 1/4 32 160 28.6 64 42.2 73 63.5 7 111.1 1.6
1 1/2 40 180 31.8 70 48.3 83 73 7 123.8 1.6
2 50 215 38.1 105 60.3 102 92.1 7 165.1 1.6
2 1/2 65 245 41.3 124 73 105 104.8 7 190.5 1.6
3 80 265 47.7 133 88.9 117 127 7 203.2 1.6
4 100 310 54 162 114.3 124 157.2 7 241.3 1.6
5 125 375 73.1 197 141.3 156 185.7 7 292.1 1.6
6 150 395 82.6 229 168.3 171 215.9 7 317.5 1.6
8 200 485 92.1 292 219.1 213 269.9 7 393.7 1.6
10 250 585 108 368 273 254 323.8 7 482.6 1.6
12 300 675 123.9 451 323.8 283 381 7 571.5 1.6
14 350 750 133.4 495 355.6 298 412.8 7 635 1.6
16 400 825 146.1 552 406.4 311 469.9 7 704.8 1.6
18 450 915 162 597 457 327 533.4 7 774.7 1.6
20 500 985 177.8 641 508 356 584.2 7 831.8 1.6
24 600 1170 203.2 762 610 406 692.2 7 990.6 1.6

Class 2500 Weld Neck Flange Dimensions

Size in Inch Normal Size Of Steel Pipe In Millimeter O.D. Thickness Of Weld Neck Flanges Outer Daimeter Of Hub Outer Daimeter Of WNRF ASME B16.5 WNRF Length WNRF Bore Daimeter Raised Face Diameter Height Of Raised Face PCD Face Of WNRF
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)
1/2 15 135 30.2 43 21.3 73 - 34.9 7 88.9 1.6
3/4 20 140 31.8 51 26.7 79 42.9 7 95.2 1.6
1 25 160 35 57 33.4 89 50.8 7 108 1.6
1 1/4 32 185 38.1 73 42.2 95 63.5 7 130.2 1.6
1 1/2 40 205 44.5 79 48.3 111 73 7 146 1.6
2 50 235 50.9 95 60.3 127 92.1 7 171.4 1.6
2 1/2 65 265 57.2 114 73 143 104.8 7 196.8 1.6
3 80 305 66.7 133 88.9 168 127 7 228.6 1.6
4 100 355 76.2 165 114.3 190 157.2 7 273 1.6
5 125 420 92.1 203 141.3 229 185.7 7 323.8 1.6
6 150 485 108 235 168.3 273 215.9 7 368.3 1.6
8 200 550 127 305 219.1 318 269.9 7 438.2 1.6
10 250 675 165.1 375 273 419 323.8 7 539.8 1.6
12 300 760 184.2 441 323.8 464 381 7 619.1 1.6

Raised Face Weld Neck Flange Dimensions

slip-on-raised-face-flange-dimensions
Normal Sizes Of Steel Pipe In Inch
Class 150 RF Flanges
Dia. Of
RF Flanges In
(Inches)
No. Of Raised Face
Bolts
Dia. Of
Raised Face Bolts
In (Inches)
Dia. Of
Bolts Hole In
(Inches)
RF Bolts Circle
In
(Inches)
1/4
3-3/8
4
1/2
0.62
2-1/4
1/2
3-1/2
4
1/2
0.62
2-3/8
3/4
3-7/8
4
1/2
0.62
2-3/4
1
4-1/4
4
1/2
0.62
3-1/8
1-1/4
4-5/8
4
1/2
0.62
3-1/2
1-1/2
5
4
1/2
0.62
3-7/8
2
6
4
5/8
0.75
4-3/4
2-1/2
7
4
5/8
0.75
5-1/2
3
7-1/2
4
5/8
0.75
6
3-1/2
8-1/2
8
5/8
0.75
7
4
9
8
5/8
0.75
7-1/2
5
10
8
3/4
0.88
8-1/2
6
11
8
3/4
0.88
9-1/2
8
13-1/2
8
3/4
0.88
11-3/4
10
16
12
7/8
1
14-1/4
12
19
12
7/8
1
17
14
21
12
1
1.12
18-3/4
16
23-1/2
16
1
1.12
21-1/4
18
25
16
1-1/8
1.25
22-3/4
20
27-1/2
20
1-1/8
1.25
25
24
32
20
1-1/4
1.38
29-1/2

Flat Face Weld Neck Flange Dimensions

slip-on-flat-face-flange-dimensions
Normal Size Of Steel Pipe FF Dia. Inner Daimeter Flat Face Holes Number Flat Face Flanges Daimeter Wall Thickness (WT) Daimeter of (B.C.) Bolt Hole Daimeter Weight in Kilogram (Kg)
(DN) (ISO) (DIN) (D5) (BN) (D) (b) (K) (d2) (Kilogram/PCS)
10 – 14 14.5 4 90 16 60 14 0.7
17.2 – 17.7 4 90 16 60 14 0.69
15 – 20 21 4 95 16 65 14 0.77
21.3 – 22 4 95 16 65 14 0.77
20 – 25 26 4 105 18 75 14 1.06
26.9 – 27.6 4 105 18 75 14 1.05
25 – 30 31 4 115 18 85 14 1.27
33.7 – 34.4 4 115 18 85 14 1.25
32 – 38 39 4 140 18 100 18 1.86
42.4 – 43.1 4 140 18 100 18 1.83
40 – 44.5 45.5 4 150 18 110 18 2.12
48.3 – 49 4 150 18 110 18 2.09
50 – 57 58.1 4 165 20 125 18 2.78
60.3 – 61.1 4 165 20 125 18 2.74
65 76.1 – 77.1 8 185 22 145 18 3.48
80 88.9 – 90.3 8 200 24 160 18 4.33
100 – 108 109.6 8 235 24 190 22 5.82
114.3 – 115.9 8 235 24 190 22 5.61
125 – 133 134.8 8 270 26 220 26 7.91
139.7 – 141.6 8 270 26 220 26 7.6
150 – 159 161.1 8 300 28 250 26 10.12
168.3 – 170.5 8 300 28 250 26 9.58
175 193.7 – 196.1 12 350 32 295 30 14.45
200 219.1 – 221.8 12 375 34 320 30 16.9
250 – 267 270.2 12 450 38 385 33 27.28
273 – 276.2 12 450 38 385 33 26.51
300 323.9 – 327.6 16 515 42 450 33 36.38
350 355.6 – 359.7 16 580 46 510 36 52.83
– 368 372.2 16 580 46 510 36 50.24
400 406.4 – 411 16 660 50 585 39 74.71
– 419 423.7 16 660 50 585 39 71.44
500 508 – 513.6 20 755 52 670 42 86.87
600 610 – 616.5 20 890 54 795 48 121.84
700 711 – 716 24 995 58 900 48 150.93
800 813 – 818 24 1140 64 1030 56 219.08
900 914 – 920 28 1250 70 1140 56 271.16
1000 1016 – 1022 28 1360 78 1250 56 344.95

Stainless Steel Weld Neck Flange Weight Chart

Normal Size Of Steel Pipe In Inches Size In Millimeter WNRF Flanges
Outer Daimeter (O.D.) In
(MM)
 WNRF Flanges
Wall Thickness Of
(D)
(In M)		 (ANSI B16.5 Weld Neck Flanges)
1/2 15 88.9 11.2 0.5
3/4 20 98.6 0.6 0.7
1 25 108 14.2 1
1 1/4 32 117.3 15.7 1.3
1 1/2 40 127 17.5 1.7
2 50 152.4 19.1 2.6
2 1/2 65 177.8 22.4 4.1
3 80 190.5 23.9 4.9
3 1/2 90 215.9 23.9 6.1
4 100 228.6 23.9 6.8
5 125 254 23.9 8.6
6 150 279.4 25.4 10.6
8 200 342.9 28.4 17.6
10 250 406.4 30.2 24
12 300 482.6 31.8 36.5
14 350 533.4 35.1 48.4
16 400 596.9 36.6 60.6
18 450 635 39.6 68.3
20 500 698.5 42.9 84.5

Weld Neck Flange Symbol

slip-on-flange-symbol

Welding Neck Flange Bolt Torque

Pipe Flange Size Inch Pipe Flange Size MM (Maximum) Radial Projection
No Deeper Than the Bottom In Millimeter Deeper Than the Bottom In Millimeter
1/2 15 3.0 1.5
3/4 20 3.0 1.5
1 25 3.0 1.5
1 1/4 32 3.0 1.5
1 1/2 40 3.0 1.5
2 50 3.0 1.5
2 1/2 65 3.0 1.5
3 80 4.5 1.5
3 1/2 90 6.0 3.0
4 100 6.0 3.0
5 125 6.0 3.0
6 150 6.0 3.0
8 200 8.0 4.5
10 250 8.0 4.5
12 300 8.0 4.5
14 350 8.0 4.5
16 400 10.0 4.5
18 450 12.0 6.0

Weld Neck Flange Sizes

Normal Pipe Size

DN

1/2

15

3/4

20

1

25

1 1/4

32

 1 1/2

40

2

50

2 1/2

65

3

80

4

100

Weld Neck Flange Tolerances

Dimension Flange Tolerance
(A) Outer Diameter (O.D.)
  • When Outer Daimeter is 24" or less: ±1/16" (1.6mm)
  • When Outer Daimeter is over 24": ±1/8" (3.2mm)
(D) Inner Diameter (I.D.)
  • 10 Inch and smaller: ±1/32" (0.8mm)
  • 12 Inch thru 18": +1/8" (3.2mm)
  • 20 Inch and larger: -1/16" (1.6mm)
(B) contact face Diameter
  • 1/16" raised face: ±1/32" (0.8mm)
  • 1/4" RF, Tongue And Groove (male And female): ±1/64" (0.4mm)
(J) hub at base Diameter
  • When hub base is 24 inch or smaller: ±1/16" (1.6mm)
  • When hub base is over 24": ±1/8" (3.2mm)
(H) Dia. of hub at point of welding
  • 5 inch and smaller: +3/32" (2.4 millimeter), -1/32" (0.8 millimeter)
  • 6 inch and larger: +5/32" (4.0 millimeter), -1/32 (0.8 millimeter)
(P) Drilling
  • B.C.: ±1/16" (1.6mm)
  • Bolt hole spacing: ±1/32" (0.8mm)
  Eccentricity of bolt circle with respect to facing
  • 2 1/2" and smaller ±1/32" (0.8mm) maximum
  • 3" and larger ±1/16" (1.6mm) maximum
(C) Wall Thickness
  • 18 Inch and smaller: ±1/8" (3.2mm), -0"
  • 20 Inch and larger: ±3/16" (4.8mm), -0"
(K) Length of hub
  • 10 Inch and smaller: ±1/16" (1.6mm)
  • 12 Inch and larger: ±1/8" (3.2mm)

Full Barrel Long Weld Neck Flange Dimensions

full-barrel-long-weld-neck-flange-dimensions
(Normal Size Of Steel Pipe) Outer Diameter Of (A) RF Diameter Of >(B) WT Of
(C) 		BoreDia.
(D) 		HubDia. at Base
(J) 		Length OfHub
(K) 		Nuts And BoltsStop Dia.
NS 		Nuts And Bolts Relief Dia.
NR 		Nuts And Bolts Relief Length Of
NL 		Numberof Bolts Holes Bolts Holes Diameter B.C. ( BoltCircle) Diameters
P 		Weight in KG (Kilogram)
1/2 3 1/2 1 3/8 7/16 0.50 1 1/4 9 1 1/2 1 1/4 3/4 4 5/8 2 3/8 21
3/4 3 7/8 1 11/16 1/2 0.75 1 5/8 9 1 7/8 1 5/8 3/4 4 5/8 2 3/4 27
1 4 1/4 2 9/16 1.00 2 9 2 1/ 4 2 3/4 4 5/8 3 1/8 30
1 1/4 4 5/8 2 1/2 5/8 1.25 2 3/8 9 2 5/8 2 3/8 3/4 4 5/8 3 1/2 36
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 3 2 5/8 3/4 4 5/8 3 7/8 41
2 6 3 5/8 3/4 2.00 3 1/4 9 3 11/ 16 3 1/16 7/8 4 3/4 4 3/4 57
2 1/2 7 4 1/8 7/8 2.50 3 3/4 9 4 7/16 3 3/4 7/8 4 3/4 5 1/2 79
3 7 1/2 5 15/16 3.00 4 1/4 9 4 15/15 4 1/4 7/8 4 3/4 6 86
3 1/2 8 1/2 5 1/2 15/16 3.50 4 7/8 9 5 15/16 4 7/8 7/8 8 3/4 7 110
4 9 6 3/16 15/16 4.00 5 1/2 12 6 7/16 5 1/2 7/8 8 3/4 7 1/2 164
5 10 7 5/16 15/16 5.00 6 1/2 12 7 1/2 6 1/2 1 8 7/8 8 1/2 189
6 11 8 1/2 1 6.00 7 3/4 12 8 1/4 7 3/4 1 8 7/8 9 1/2 216
8 13 1/2 10 5/8 1 1/8 8.00 9 3/4 12 10 1/2 9 3/4 1 8 7/8 11 3/4 292
10 16 12 3/4 1 3/16 10.00 12 12 12 7/8 12 1 1/8 12 1 14 1/4 382
12 19 15 1 1/4 12.00 14 3/8 12 15 9/16 14 3/8 1 1/2 12 1 17 535
14 21 16 1/4 1 3/8 14.00 16 12 17 1/8 16 1 1/4 12 1 1/8 18 3/4 585
16 23 1/2 18 1/2 1 7/16 16.00 18 12 19 5/8 18 1 1/4 16 1 1/8 21 1/4 714
18 25 21 1 9/16 18.00 20 12 20 15/16 20 1 3/8 16 1 1/4 22 3/4 711
20 27 1/2 23 1 11/16 20.00 22 12 23 3/16 22 1 3/8 20 1 1/4 25 840
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