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ANSI / ASME B16.5 Weld Neck Flange

Manufacturer of ANSI B16.5 PN16 WNRF Flange in Mumbai, India, Carbon Steel WNRF Flange Suppliers.

EN 1092-2 PN16 Weld Neck Flange Dimensions & MSS SP-44 Api 6a Weld Neck Flange Price List, Reducing Weld Neck Flange manufacturer in India.

wnrf reducing flange are easy to recognize because of their appearance. For instance, the weld neck flange pn16 at the long tapered hub, that goes progressively over to the thickness of the wall from a pipe or fitting. The long tapered hub of the Stainless Steel weld neck orifice Flanges provides an important reinforcement. This reinforcement in the Duplex Steel weld neck ring type joint flange is considered to be useful in several applications involving extreme temperatures. Hence, Alloy Steel weld neck flat face flange could be used in a wide array of different climatic conditions. For instance, the Carbon Steel weld neck raised face flange or the Inconel weld neck raised flange could be used in any of the following environments - high pressure, sub-zero and / or elevated temperatures. The smooth transition from DIN86029 weld neck welded flange thickness to pipe or fitting wall thickness effected by the taper is extremely beneficial, which under conditions of repeated bending, could be  caused by line expansion or other variable forces.


ASME B16.5 Weld Neck Flanges Manufacturers In India

ASME B16.5 Weld Neck Flanges

Flange WNRF ASME B16.5 Suppliers In Mumbai

Flange WNRF ASME B16.5

Stainless Steel Weld Neck Orifice Flanges Distributor In UAE

Stainless Steel Weld Neck Orifice Flanges

Paa Para

ASME B16.47 Series a En 1092-1 Type 11 Welding Neck Flange manufacturers, ASME B16.47 Series b Flat Face Weld Neck Flange Exporter in India, Din 2633 Weld Neck Flange Pn16 stockholder, ANSI B16.5 Class 150 Forged Weld Neck Flange Price List in Mumbai.

These weld neck threaded flange are bored to match the inside diameter of the mating pipe or fitting. Thus, there will be no restriction of product flow. This prevents turbulence at the joint, thereby effectively reducing erosion. The wnrf flange class 150 also provides excellent stress distribution through the tapered hub and can be easily radiographed for flaw detection. ASTM A182 SS weld neck reducing flange are meant for both Pipe as well as Flanged Fittings. The specification for the ASTM A182 SS weld neck reducing flange Standard covers, dimensions, tolerances, marking, testing, pressure &temperature ratings, materials including methods of designating openings for pipe flanges and flanged fittings. The following points are included:
(1) ASME B16.5 Weld Neck Flanges with pressure rating class designations i.e. class 150, class 300, class 400, class 600, class 900, and class 1500 in a size range between NPS 1/2 up to NPS 24 and weld neck flange EN 1092 1 with pressure rating class designation class 2500 is available in sizes NPS 1/2 till NPS 12. The requirements of the welding neck flange EN 1092 have been given in both metric as well as the U.S. Customary units with diameter of bolts and flange wnrf ASME B16.5 bolt holes expressed in inch units;
(2) flanged fittings with rating class designation 150 and 300 in sizes NPS 1/2 up until NPS 24, with requirements of these table e weld neck Flanges fittings as mentioned in both metric and U.S. Customary units with diameter of bolts and wnrf rtj flange bolt holes expressed in inch units.
(3) flanged fittings with rating class designation 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 24 and weld neck rtj flange fittings with rating class designation with stainless steel weld neck flange weight 2500 in sizes NPS 1/2 up until  NPS 12. These have been acknowledged in the specification in Non-Mandatory Appendix E section of the weld neck Flanges ANSI B16.5 in which only U.S. Customary units are provided.
ASME B16.5 Weld Neck Flanges has been limited to flanges and flanged fittings made from materials such as cast or forged materials. While blind flanges and certain reducing flanges could be manufactured from other metals such as cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding the stainless steel weld neck flange dimensions for bolting, flange gaskets, and flange joints.
This Standard is to be used by stainless steel weld neck flange manufacturers in conjunction with equipment’s that have been mentioned in other volumes of the Standards in ASME B16 Series as well as with other ASME standards, like both the Boiler and Pressure Vessel Code as well as the B31 Piping Codes.


What is ASME B16.5 Weld Neck Flanges?


ASME B16.5 Weld Neck Flanges

ASME B16.5 Weld Neck Flanges has been limited to flanges and flanged fittings made from materials such as cast or forged materials. While blind flanges and certain reducing flanges could be manufactured from other metals such as cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding the stainless steel weld neck flange dimensions for bolting, flange gaskets, and flange joints.


ASME B16.5 WNRF Flange Price List


SR NO QTY Description PRICE (USD$) TOTAL
1 45 Flange 2" 150 XH RF Weld neck CS A/SA105  $6.20  $279.00
26 32 Flange 2" 300 XH RF Weld neck CS A/SA105  $9.40  $300.80
2 80 Flange 2" 600 XH RF Weld neck CS A/SA105  $11.20  $896.00
3 200 Flange 4" 150 STD RF Weld neck CS A/SA105  $12.90  $2,580.00
4 35 Flange 4" 300 XH RF Weld neck CS A/SA105  $20.60  $721.00
5 100 Flange 4" 600 XH RF Weld neck CS A/SA105  $42.80  $4,280.00
6 60 Flange 4" 600 Sch 160 RF Weld neck CS A/SA105  $47.90  $2,874.00
7 48 Flange 6" 300 STD RF Weld neck CS A/SA105  $34.20  $1,641.60
8 10 Flange 8" 600 STD RF Weld neck CS A/SA105  $ 111.20  $1,112.00
9 10 Flange 8" 600 XH RF Weld neck CS A/SA105  $ 111.20  $1,112.00
10 10 Flange 10" 300 STD RF Weld neck CS A/SA105  $ 145.36  $1,453.60
11 30 Flange 12" 150 STD RF Weld neck CS A/SA105  $85.50  $2,565.00

Please note this is an approx Price of welding neck flange EN 1092 in India. For final table e weld neck Flanges Price List Please Call on +91 22 66109735 or drop an Email to sales@skylandmetal.in.

Stainless Steel Weld Neck Flange Specification


ASME B16.5 Weld Neck Flange Size Chart 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Weld Neck Flange Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Weld Neck Flange
Weld Neck Flange Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Weld Neck Flange
Weld Neck Flange Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Weld Neck Flange, ASME Weld Neck Flange, BS Weld Neck Flange, DIN Weld Neck Flange, EN Weld Neck Flange, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
weld neck flange EN 1092 1 6Bar 10Bar 16Bar 25Bar 40Bar Weld Neck Flange
Coating weld neck Flanges ANSI B16.5 Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Weld Neck Flange
Most common types of Weld Neck Flange Forged / Threaded / Screwed / Plate
JIS welding neck flange EN 1092 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Weld Neck Flange
UNI table e weld neck Flanges 6Bar 10Bar 16Bar 25Bar 40Bar Weld Neck Flange
Test Certificates flange wnrf ASME B16.5 EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Special design weld neck rtj flange

As per your drawing

AS, ANSI, BS, DIN and JIS
15 NB (1/2") to 200 NB (8")
Equal and Reducing Configurations

Stainless Steel weld neck orifice Flanges Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Carbon Steel weld neck raised face flange Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Production technique
  • Forged, Heat treated and machined
Connect Type/ Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Origin Of ASTM A182 SS weld neck reducing flange Indian / West Europe / Japan / USA / Korean
Manufacturer of stainless steel weld neck flange manufacturers

ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
Weld Neck Flange: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange

  • B.S: BS4504 , BS3293, BS1560, BS10
  • AS 2129: Table D; Table E; Table H
  • ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • American standard (ANSI)
  • German (DIN)
  • British standard (BS)
  • DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 Weld Neck Flange
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Weld Neck Flange Uses & application
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.
Export to weld neck threaded flange Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175
stainless steel weld neck flange manufacturers in india

Weld Neck Flange Material


Prestige quality ASME B16.5 Weld Neck Flange manufacturers in India offer these Carbon Steel WNRF Flange in EN, DIN, ISO, BS, JIS or ANSI standard.

Carbon Steel weld neck raised face 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 orifice Flanges 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
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
Brass Weld Neck Flange 3602 / 2604 / H59 / H62 / etc.
Alloy Steel weld neck flat face 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
Inconel weld neck raised flange ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 Flange
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
Hastelloy Weld Neck Flange ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flange
Monel Weld Neck Flange ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
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 Flange
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

Skyland Metal is an ISO certified ASME B16.5 Weld Neck Flange manufacturers in mumbai & PN16 WNRF Flange distributor in India


Weld Neck RTJ Flange Material Type


ASME B16.5 Weld Neck Flange

ASME B16.5 Weld Neck Flange
14 Inch, Class 900, ASTM A182 F316L Weld Neck Flange, ANSI B16.5

ASME B16.5 WNRF Flange

ASME B16.5 WNRF Flange
10 Inch, 600 LB, RF, ASTM A182 F316 WN Flange, ASME B16.5

weld neck flanges ansi b16.5

weld neck flanges ansi b16.5
12 Inch, Class 150, ASTM A182 F304 Stainless Steel WN Flange, RF

ASME B16.47 Series a WNRF Pipe Flange

ASME B16.47 Series a WNRF Pipe Flange
12 Inch, SCH60 300LB, ANSI B16.5 Weld Neck Flange A105


ASME B16.47 Series b Weld Neck Ring Joint Flange

ASME B16.47 Series b Weld Neck Ring Joint Flange
10 Inch, 900LBS, ASME B16.5 Welding Neck Flange, SCH80

WNRF Class 150 Flanges

WNRF Class 150 Flanges
DN65, RF Ends, ASTM A105 Welding Neck Flange, SCH 40

Weld Neck Flange Class 300

Weld Neck Flange Class 300
26 Inch, CL600, SCHXS WN Flange, ASME A105N, RF

Weld neck flange en 1092 1

Weld neck flange en 1092 1
10 Inch, ANSI B16.5, SCH STD, A105N WN Flange, Class 600


Weld neck flange pn16

Weld neck flange pn16
24 Inch, RF, SCH 10, A182 F304L Weld Neck Flange, CL150

Forged Weld Neck Reducing Flange

Forged Weld Neck Reducing Flange
A182 S32750, 150LB, Stainless Steel Flange, WN

AWWA C207 Class d educing Flange

AWWA C207 Class d educing Flange
10IN, CL300, ASME B16.5 WN Flange, A105, SCH STD

MSS SP-44 groove weld neck flange

MSS SP-44 groove weld neck flange
2 1/2 Inch, SCH 80S, SS Forged WN Flange, ASTM A182 F316L, B16.5


Skyland Metal is a ASME B16.5 Weld Neck Flange Mnufacturers and supplier of offering in all Ratings up to 2500#, built a distribution network with more then 65 countries globally.


Stainless Steel Weld Neck Flange Dimensions


ANSI B16.5 Long Weld Neck Flange Dimensions And PN16 Weld Neck Flange Dimensions & Weld Neck flange Dimensions

stainless steel weld neck flange dimensions

ANSI B16.5 Welding Neck Flanges 150 lbs Dimensions


Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 90 9.6 30 21.3 46 Refer Note 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

Note: Welding Neck bore is derived from the pipe schedule


Skyland Metal & Alloys Inc. is a Govt. approved certified Stockist of ASME B16.5 Weld Neck Flange in India, We have our Reducing Weld Neck Flange distributor and wholesaler in Malaysia, Stainless Steel Weld Neck Flange for Indonesia, Singapore, United Arab Emirates (UAE) & South Africa. We are well-known as a trusted Manufacturer of Api 6a Weld Neck Flange in Mumbai, India.


Weld Neck Flange Class 300 Dimensions


Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
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

Note: Welding Neck bore is derived from the pipe schedule


ASME B16.5 Weld Neck Flanges Class 400 Dimensions


Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 95 14.3 38 21.3 52 Refer Note 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

Note: Welding Neck bore is derived from the pipe schedule


Weld Neck Flange Class 600 Dimensions


Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 95 14.3 38 21.3 52 Refer Note 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

Welding Neck Flanges 900 LBS Dimensions


Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
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

Welding Neck Flanges 1500 lbs Dimensions


Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
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 80 265 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

Note: Welding Neck bore is derived from the pipe schedule


Class 2500 Weld Neck Flanges Dimensions


Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 135 30.2 43 21.3 73 Refer Note 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

Note: Welding Neck bore is derived from the pipe schedule


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JIS Weld Neck Flange Dimensions


JIS 16K Weld Neck Flange Dimensions, JIS 20K Weld Neck Flange Dimensions

JIS Weld Neck Flange Dimensions

Nominal Outside Inside Outside Sectional Dimensions of Flange Bolt Hole Nominal Approx.
Dia. of Dia. of Dia. of Dia. of t T Dia. of Hub r Dia. of Dia. of Bolt. Number Hole Bolt Weight
Flange Steel Flange Flange a b Face Raised Face Circle of Bolt Dia. Size (kg)
  Pipe do D f g Dia Holes h BL SOH
10 17.3 17.8 90 12 16 26 28 4 1 46 65 4 15 M12 0.53 0.52
15 21.7 22.2 95 12 16 30 32 4 1 51 70 4 15 M12 0.6 0.58
20 27.2 27.7 100 14 20 38 42 4 1 56 75 4 15 M12 0.79 0.75
25 34 34.5 125 14 20 46 50 4 1 67 90 4 19 M16 1.22 1.16
32 42.7 43.2 135 16 22 56 60 5 2 76 100 4 19 M16 1.66 1.53
40 48.6 49.1 140 16 24 62 66 5 2 81 105 4 19 M16 1.79 1.64
50 60.5 61.1 155 16 24 76 80 5 2 96 120 8 19 M16 2.09 1.83
65 76.3 77.1 175 18 26 94 98 5 2 116 140 8 19 M16 3.08 2.58
80 89.1 90 200 20 28 108 112 6 2 132 160 8 23 M20 4.41 3.61
-90 101.6 102.6 210 20 30 120 124 6 2 145 170 8 23 M20 4.92 3.89
100 114.3 115.4 225 22 34 134 138 6 2 160 185 8 23 M20 6.29 4.87
125 139.8 141.2 270 22 34 164 170 6 2 195 225 8 25 M22 9.21 7.09
150 165.2 166.6 305 24 38 196 202 6 2 230 260 12 25 M22 12.7 9.57
200 216.3 218 350 26 40 244 252 6 2 275 305 12 25 M22 18.4 12
250 267.4 269.5 430 28 44 304 312 6 2 345 380 12 27 M24 30.4 20.1
300 318.5 321 480 30 48 354 364 8 3 395 430 16 27 M24 40.5 24.3
350 355.6 358.1 540 34 52 398 408 8 3 440 480 16 33 M30×3 57.5 34.4
400 406.4 409 605 38 60 446 456 10 3 495 540 16 33 M30×3 81.7 47.4
450 457.2 460 675 40 64 504 514 10 3 560 605 20 33 M30×3 107 61.8
500 508 511 730 42 68 558 568 10 3 615 660 20 33 M30×3 132 73.7
-550 558.8 562 795 44 70 612 622 10 3 670 720 20 39 M36×3 163 87.9
600 609.6 613 845 46 74 666 676 10 3 720 770 24 39 M36×3 192 98.4
650 660.4 664 895 48 77 704 726 10 5 770 820 24 39 M36×3
700 711.2 715 960 50 80 754 776 10 5 820 875 24 42 M39×3
750 762 766 1020 52 83 806 832 10 5 880 935 24 42 M39×3
800 812.8 817 1085 54 86 865 885 10 5 930 990 24 48 M45×3
850 863.6 868 1135 56 89 916 936 10 5 980 1040 24 48 M45×3
900 914.4 919 1185 58 93 968 986 10 5 1030 1090 28 48 M45×3
1000 1016 1021 1320 62 99 1070 1098 12 5 1140 1210 28 56 M52×3
1100 1117.6 1123 1420 66 105 1180 1200 12 15 1240 1310 32 56 M52×3
1200 1219.2 1225 1530 70 112 1282 1302 12 5 1350 1420 32 56 M52×3
1300 1320.8 1326 1645 74 5 1450 1530 32 62 M56×3
1350 1371.6 1377 1700 76 5 1510 1590 32 62 M56×3
1400 1422.4 1428 1755 78 5 1560 1640 36 62 M56×3
1500 1524 1529 1865 80 5 1670 1750 36 62 M56×3

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ANSI B16.5 Weld Neck Flange Schedule Chart


ANSI B16.5 Weld Neck Flange Schedule Chart
WELDING NECK FLANGES BORES (in inchines)
Nom
Pipe
Size
Outside
Diam
Sched
10
Sched
20
Sched
30
Std.
Wall
Sched
40
Sched
60
Extra
Strong
Sched
80
Sched
100
Sched
120
Sched
140
Sched
160
Double
Extra
Strong
1/2” 0.840 0.674 0.622 0.622 0.546 0.546 0.464 0.252
3/4” 1.050 0.884 0.824 0.824 0.742 0.742 0.612 0.434
1” 1.315 1.097 1.049 1.049 0.957 0.957 0.815 0.599
1.1/4” 1.660 1.442 1.380 1.380 1.278 1.278 1.160 0.896
1.1/2” 1.900 1.682 1.610 1.610 1.500 1.500 1.338 1.100
2” 2.375 2.157 2.067 2.067 1.939 1.939 1.687 1.503
2.1/2” 2.875 2.635 2.469 2.469 2.323 2.323 2.125 1.771
3” 3.500 3.260 3.068 3.068 2.900 2.900 2.624 2.300
3-1/2” 4.000 3.760 3.548 3.548 3.364 3.364 2.728
4” 4.500 4.260 4.026 4.026 3.826 3.826 3.624 3.438 3.152
5” 5.563 5.295 5.047 5.047 4.813 4.813 4.563 4.313 4.063
6” 6.625 6.357 6.065 6.065 5.761 5.761 5.501 5.187 4.897
8” 8.625 8.329 8.125 8.071 7.981 7.981 7.813 7.625 7.625 7.437 7.187 7.001 6.813 6.875
10” 10.750 10.420 10.250 10.136 10.020 10.020 9.750 9.750 9.562 9.312 9.062 8.750 8.500 8.750
12” 12.750 12.390 12.250 12.090 12.000 11.938 11.626 11.750 11.374 11.062 10.750 10.500 10.126 10.750
14” 14.000 13.500 13.376 13.250 13.250 13.124 12.812 13.000 12.500 12.124 11.814 11.500 11.188
16” 16.000 15.500 15.376 15.250 15.250 15.000 14.688 15.000 14.312 13.938 13.564 13.124 12.812
18” 18.000 17.500 17.376 17.124 17.250 16.876 16.500 17.000 16.124 15.688 15.250 14.876 14.438
20” 20.000 19.500 19.250 19.000 19.250 18.812 18.376 19.000 17.938 17.438 17.000 16.500 16.062
24” 24.000 23.500 23.250 22.876 23.250 22.624 22.062 23.000 21.562 20.938 20.376 19.876 19.312
30” 30.000 29.376 29.000 28.750 29.250 29.000
36” 36.000 35.376 35.000 34.750 35.250 34.500 35.000
42” 42.000 41.250 41.000

ASME B16.5 Stainless Steel Weld Neck Flange Weight Chart In KG


ANSI B16.5 WELD NECK FLANGES WEIGHT (KGS)
Nom
Pipe
Size
150# 300# 600# 900# 1500# 2500#
WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K
1/2” 0.7 0.4 0.5 0.8 0.7 0.8 0.9 0.8 0.8 2.1 1.8 1.9 2.1 1.8 1.9 3.2 3 3
3/4” 0.8 0.7 0.8 1.4 1.2 1.2 1.6 1.4 1.4 2.7 2.4 2.7 2.7 2.4 2.7 3.6 4 4.5
1” 1.1 0.8 0.9 1.7 1.4 1.5 1.9 1.7 1.7 3.9 3.6 3.7 3.9 3.6 3.7 5.4 5 5
1.1/4” 1.5 1.2 1.3 2.2 1.8 2 2.6 2.1 2.4 4.5 4.1 4.3 4.5 4.1 4.3 7.8 8 8
1.1/2” 1.8 1.4 1.6 3.2 2.7 2.9 3.6 3.1 3.4 6.2 5.4 5.9 6.2 5.4 5.9 11.5 11 11
2” 2.7 2.2 2.6 3.6 3.2 3.5 4.7 3.9 4.4 11.3 10.5 11.3 11.3 10.5 11.3 19 17 17
2.1/2” 4.4 3.5 4.1 5.4 4.5 5.3 4.8 5.4 6.8 16.3 15.8 16 16.3 15.8 16 24 25 25
3” 5.2 3.8 5.1 7.3 5.9 7.2 8.7 7.3 8.9 15 12.3 16.8 21 21.5 19.5 42.6 38 39
3-1/2” 6.4 5 6.5 8.9 7.5 9.2 11.6 9 12.7
4” 7.5 5.6 7.5 11.8 10 12.2 18.4 16.5 18.6 24 23.2 24.5 31.8 31 33 64 58 60
5” 9.2 6.5 9.2 16 12.5 16 31 28.5 30.8 38.5 37.5 39.5 59 58.8 60 111 95 101
6” 11.0 8.1 11.8 20.2 16.5 22 37 36.2 38 50 48.3 51.5 72 74 75 171 146 156
8” 18.4 13 20.4 31.2 25.5 36 54.5 51.5 62.2 85 75 89 124 112 125 261 220 242
10” 25.5 18.4 31 44.3 35 55 98.5 76.2 102 123 110 131 207 184 215 485 420 465
12” 37 28.5 47 63.5 52 82.5 105 89.5 132 168 146 187 306 264 316 698 590 665
14” 51 37.5 60 86 73 108 150 102 158 198 172 224 416
16” 61.5 44.5 61 112 88 139 177 150 225 225 192 259 567
18” 71.5 54 93 141 115 178 228 180 285 318 272 383 736
20” 85 72 127 173 139 228 285 231 365 376 330 482 929
24” 119 95 190 248 212 350 372 330 532 680 632 905 1504

ANSI B16.5 Weld Neck Flange Tolerances



ANSI B16.5 Weld Neck Flange Tolerances

Dimension Flange Tolerance
A Outside Diameter
  • When O.D. is 24" or less: ±1/16" (1.6mm)
  • When O.D. is over 24": ±1/8" (3.2mm)
D Inside Diameter
  • 10" and smaller: ±1/32" (0.8mm)
  • 12" thru 18": +1/8" (3.2mm)
  • 20" and larger: -1/16" (1.6mm)
B Diameter of contact face
  • 1/16" raised face: ±1/32" (0.8mm)
  • 1/4" Raised Face, Tongue & Groove (male & female): ±1/64" (0.4mm)
J Diameter of hub at base
  • When hub base is 24" or smaller: ±1/16" (1.6mm)
  • When hub base is over 24": ±1/8" (3.2mm)
H Diameter of hub at point of welding
  • 5" and smaller: +3/32" (2.4mm), -1/32" (0.8mm)
  • 6" and larger: +5/32" (4.0mm), -1/32 (0.8mm)
P Drilling
  • Bolt circle: ±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) max.
  • 3" and larger ±1/16" (1.6mm) max.
C Thickness
  • 18" and smaller: ±1/8" (3.2mm), -0"
  • 20" and larger: ±3/16" (4.8mm), -0"
K Length of hub
  • 10" and smaller: ±1/16" (1.6mm)
  • 12" and larger: ±1/8" (3.2mm)

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