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ASME B16.5 Stainless Steel Weld Neck Flange

Global Suppliers of EN 1092-2 Raised Face Weld Neck Flange In Australia And Canada, One of India’s Largest Manufacturer Of ANSI B16.5 Carbon Steel WNRF Flange In India.

Compare Prices Before You Buy MSS SP-44 Alloy Steel Welding Neck, Check ASME B16.5 Weld Neck Flange Dimensions Class 300 And Weight Chart, Contact Us For DN65 DN80 PN16 WNRF Flange Instant Delivery.

ASME B16.5 Weld Neck Flanges are made from different materials and compositions to supply a variety of flanges in the size range of ½ inches to 24 inches. Stainless steel weld neck flange manufacturers produce these flanges in two main categories; with a raised face and without a raised face. Stainless steel weld neck flange dimensions vary depending on their grading and pressure class as well as with the consideration of weight. Stainless steel weld neck flange weight in turn depends on the size and material as well. Weld neck flange EN 1092 1 for example is a series of flanges with specifications for circular flanges in the range of PN number 2 to 400. Welding neck flange EN 1092 have a different set of specification.


Stainless Steel Weld Neck Flange Manufacturer In India

Stainless Steel Weld Neck Flange

ASME B16.5 Carbon Steel WNRF Flange

ASME B16.5 Carbon Steel WNRF Flange

EN 1092-2 Copper Weld Neck Flange

EN 1092-2 Copper Weld Neck Flange

View Copper WNRF Flange Sch 40, We Rajtilak Metal Are One Of The Leading EN 1092-1 Type 02 Stainless Steel Weld Neck Flange Manufacturers And Suppliers Of Aluminium Flat Face Weld Neck Flange, ASME B16.5 Class 300 Weld Neck Flange Exporter in India.

There are specification tables that provide detailed information on the properties of a flange. For example the table e weld neck Flanges have specifications unique the table E. flange wnrf ASME B16.5 indicates that the flanges in this range have a raised face and are from NPS1/2 to NPS24. The different shapes of the stainless steel weld neck flange assist in different functionalities of it. Weld neck rtj flange has a ring type joint and it uses grooves and gaskets. Stainless Steel weld neck orifice Flanges are special in that they are used in fluid flow systems with orifice meters for measurement.


What is Stainless Steel Weld Neck Flange?


ASME B16.5 Stainless Steel Weld Neck Flange Manufacturer in India

Carbon Steel weld neck raised face flange is the commonly used one whereas specifications like ASTM A182 SS weld neck reducing flange or the Alloy Steel weld neck flat face flange have to be specified upon order. DIN86029 weld neck welded flange is a PN10 pressure class flange. Duplex Steel weld neck ring type joint flange could also be used as replacement to other materials. Inconel weld neck raised flange can either be blunt ended or with a thread as in the weld neck threaded flange. The threads are used to be threaded onto the threads on the pipes. Weld neck flange pn16 is of a high pressure class. Wnrf flange class 150 is of a low pressure class with a raised face. Wnrf reducing flange is a raised face weld neck flange. Another commonly used type is wnrf rtj flange which has a ring type joint. Their applications are mostly in fluid flow systems with high pressure as the welded neck accounts for extra strength and is leak proof.


ASME B16.5 Carbon Steel WNRF Flange Price List In India


SR NO Description PRICE (USD$)
1 Flange 2" 150 XH RF Weld neck Carbon Steel A/ SA105 $5
2 Flange 2" 300 XH RF Weld neck Carbon Steel A/ SA105 $8.94
3 Flange 2" 600 XH RF Weld neck Carbon Steel A/ SA105 $9.57
4 Flange 4" 150 STD RF Weld neck Carbon Steel A/ SA105 $10.38
5 Flange 4" 300 XH RF Weld neck Carbon Steel A/ SA105 $17.64
6 Flange 4" 600 XH RF Weld neck Carbon Steel A/ SA105 $40.38
7 Flange 4" 600 Sch 160 RF Weld neck Carbon Steel A/ SA105 $45.94
8 Flange 6" 300 STD RF Weld neck Carbon Steel A/ SA105 $32.27
9 Flange 8" 600 STD RF Weld neck Carbon Steel A/ SA105 $ 106.28
10 Flange 8" 600 XH RF Weld neck Carbon Steel A/ SA105 $ 102.27
11 Flange 10" 300 STD RF Weld neck Carbon Steel A/ SA105 $ 137.36
12 Flange 12" 150 STD RF Weld neck Carbon Steel A/ SA105 $85

Please note this is an approx Price of ASME B16.5 Stainless Steel Weld Neck Flange in Mumbai, India. For final EN 1092-2 Raised Face Weld Neck Flange Price List Please Call on 91 - 22 - 67437342 or drop an Email to info@rajtilakmetal.com


Specification Of Weld Neck Pipe Flanges


Wnrf 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
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
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
  • 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
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
  • 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
Full Bore Weld Neck Flange Uses & application
  • Copper Weld Neck Flange Nuclear power (mostly seamless).
  • Titanium Weld Neck Flange Petrochemicals and acids.
  • Stainless Steel Weld Neck Flange Bitumen upgraders.
  • Carbon Steel Weld Neck Flange Heavy oil refineries.
Weld Neck Pipe Flanges EN 1092 1 6Bar 10Bar 16Bar 25Bar 40Bar Weld Neck Flange
Coating Raised Face Weld Neck Flange Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Weld Neck Flange
Special design Welding Neck

As per your drawing

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

Origin Of Full Bore Weld Neck Flange Indian / West Europe / Japan / USA / Korean
Most common types of Reducing Weld Neck Flange Forged / Threaded / Screwed / Plate
Flat Face Weld Neck Flange Size Chart 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Weld Neck Orifice Flange Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Weld Neck Flange
Stainless Steel Weld Neck Flange Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Weld Neck Flange
JIS Rtj Weld Neck Flange 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Weld Neck Flange
UNI Raised Face Weld Neck 6Bar 10Bar 16Bar 25Bar 40Bar Weld Neck Flange
Test Certificates ASME B16.5 WNRF Flange EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
ASME B16.5 Weld Neck Flange Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Full Face Weld Neck Flange Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Production technique
  • Forged, Heat treated and machined
Export to ASME B16.5 Weld Neck Flange Ireland, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, 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

Rajtilak Metal has reputed name in metal industry as a ASME B16.5 Stainless Steel Weld Neck Flange Manufacturers India with hogh quality standards and material. EN 1092-2 Raised Face Weld Neck Flange have drilled wall thickness which is of equally same dimension existing for matching pipe. ANSI B16.5 WNRF Flange in all standard in which the common world standards include PN/ DIN (European) and JIS/ KS (Japanese/ Korean), ASA/ ANSI/ ASME (USA), BS10 (British/ Australian).


Full Face Weld Neck Flange Material


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)
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
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
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
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
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
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
Other Weld Neck Flange material Tin bronze, Aluminum bronze, Lead bronze

Types Of ASME B16.5 Weld Neck Flange


ASME B16.5 Welding Neck

ASME B16.5 Welding Neck
8 in. 300# Standard Raised Face Carbon Steel Weld Neck Flange

ASME B16.5 WNRF Flange

ASME B16.5 WNRF Flange
3 in. 600# Extra Heavy Duty Raised Face Carbon Steel Weld Neck Flange

ANSI B16.5 Raised Face Weld Neck Flange

ANSI B16.5 Raised Face Weld Neck Flange
24 in. 600# Raised Face Standard Carbon Steel Weld Neck Flange

ASME B16.47 Series a Weld Neck Pipe Flanges

ASME B16.47 Series a Weld Neck Pipe Flanges
1-1/4 in. 150# Schedule 10 Raised Face Weld Neck 316L Stainless Steel Flange


ASME B16.47 Series b Reducing Weld Neck Flange

ASME B16.47 Series b Reducing Weld Neck Flange
6 in. 150# Standard Flat Face Weld Neck 316L Stainless Steel Flange

Stainless Steel WNRF Class 150 Flanges

Stainless Steel WNRF Class 150 Flanges
1-1/2 in. 300# Extra Heavy Raised Face Weld Neck 304L Stainless Steel Flange

Stainless Steel Weld Neck Flange Class 300

Stainless Steel Weld Neck Flange Class 300
6 in. 900# Schedule 160 Raised Face Weld Neck 316L Stainless Steel Flange

Flat Face Weld Neck Flange en 1092 1

Flat Face Weld Neck Flange en 1092 1
3 in. 900# Extra Heavy Raised Face Weld Neck 316L Stainless Steel Flange


Weld Neck Orifice Flange pn16

Weld Neck Orifice Flange pn16
1-1/2 in. 300# Extra Heavy Raised Face Carbon Steel Weld Neck Flange

Forged Rtj Weld Neck Flange

Forged Rtj Weld Neck Flange
3 in. 600# Extra Heavy Duty Raised Face Carbon Steel Weld Neck Flange

AWWA C207 Class d Raised Face Weld Neck

AWWA C207 Class d Raised Face Weld Neck
20 in. 600# Schedule 40 Raised Face Carbon Steel Weld Neck Flange

MSS SP-44 Full Bore Weld Neck Flange

MSS SP-44 Full Bore Weld Neck Flange
24 in. 600# Raised Face Standard Carbon Steel Weld Neck Flange


We at Rajtilak Metal, would like to take the opportunity to introduce as a leading ASME B16.5 Stainless Steel Weld Neck Flange manufacturers in India. Carbon Steel Weld Neck Flange are stocked or available in the following range of materials and sizes for the gas, oil, allied and petrochemical industries.


ASME B16.5 Stainless Steel Weld Neck Flange Dimensions


ASME B16.5 Stainless Steel Weld Neck Flange Dimensions

150# Weld Neck Flange 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


Class 300 Weld Neck Flange


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


Stainless Steel Weld Neck Flange Class 400


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


Welding Neck Flange Asme B16.5 Class 600


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

Class 900 Weld Neck Flange Dimensions In MM


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

Stainless Steel Welding Neck Flange 1500 Lbs


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


Weld Neck Flange Dimensions Class 2500


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


ASME B16.5 Weld Neck Flange Pressure Ratings


ASME B16.5 Weld Neck Flange Pressure Ratings
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 Standard Manufacturing Materials


Dimensions Base Material Pressure Rating
ASME B16.5 ASTM A182 (Forgings) ASTM A240 (Plate) 150#. 300#. 400#. 600#. 900#. 1500#. 2500#.
API 605 ASTM A182 (Forgings) ASTM A240 (Plate) 150#. 300#. 400#. 600#. 900#. 1500#. 2500#.
ASME B16.47series A & B ASTM A182 (Forgings) ASTM A240 (Plate) 150#. 300#. 400#. 600#. 900#. 1500#. 2500#.
EN1092-1 ASTM A182 (Forgings) PN2.5. PN6. PN10. PN16. PN25. PN40. PN63. PN100. PN160. PN250. PN320. PN400.
BS4504 BS970 (Bar)ASTM A240 (Plate) ASTM A182 (Forgings) PN2.5. PN6. PN10. PN16. PN25. PN40. PN63. PN100. PN160.
BS10 BS970 (Bar)ASTM A240 (Plate) ASTM A182 (Forgings)

Typical Stainless Steel 18/8 Grade Designations


ASTM BS DIN EURONORM
304 304S15 X5 Cr Ni 18 10 1.4301
304L 304S11 X2 Cr Ni 18 9 1.4307
316 316S31 X5 Cr Ni Mo 17 12 2 1.4401
316L 316S11 X2 Cr Ni Mo 17 13 2 1.4404
321 321S31 X6 Cr Ni 18 10 1.4541
316Ti 320S31 X6 Cr Ni Mo Ti 17 12 2 1.4571
SMO 254SMO X1 Cr Ni Mo Cu N 20 18 7 1.4547

America Series: Class 150, Class 300, Class 600, Class 900A, Class 1500, Class 2500.
Europe Series: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN250, PN320, PN400.

ASME B16.5 Weld Neck Flange Material Carbon steel  ASTM A105. ASTM A350 LF1. LF2, CL1/CL2, A234, S235JRG2, P245GH
P250GH, P280GHM 16MN, 20MN ,20#
Stainless steel  ASTM A182, F304/304L, F316/316L
Alloy steel ASTM A182 F12, F11, F22, F5, F9, F91 etc.
Weld Neck Flange Standard ANSIClass 150 Flanges-Class 2500 Flanges
DIN 6Bar 10Bar 16Bar 25Bar 40Bar
JIS 5K Flanges-20K Flanges
UNI 6Bar 10Bar 16Bar 25Bar 40Bar
EN 6Bar 10Bar 16Bar 25Bar 40Bar

SS Weld Neck Flange Schedule Chart


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

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There are two types of ASME B16.5 Stainless Steel Weld Neck Flange, Which are Standard weld neck flange and Long weld neck flange. PN16 WNRF Flange are used in buttweld fittings. We are well known as Reducing Weld Neck Flange manufacturers, used with equipment and vessel nozzles. Class 300 Weld Neck Flange are created to match the pipe’s inside fitting or diameter. The reason why it is bored to match is because it reduces the corrosion and turbulence that takes place inside of the pipe.