WELD NECK
FLANGES
CONTENTS
Overview
WELD NECK FLANGES— Manufacturers & Suppliers in India
Weld Neck Flanges (WNRF) are easily identified by their long tapered hub, which provides a gradual transition from the flange to the pipe wall. This design reduces stress concentration at the welded joint, making them the preferred choice for high-pressure, high-temperature, low-temperature, and cyclic loading applications. The bore is precisely machined to match the internal diameter of the mating pipe, ensuring smooth flow, minimal turbulence, reduced pressure loss, and allowing full radiographic inspection of the weld joint for critical services.
Manibhadra Metals is a trusted manufacturer and supplier of ASME B16.5 Weld Neck Flanges in India, offering sizes from ½″ NB to 48″ NB in Class 150 to 2500 pressure ratings. We manufacture WNRF in Carbon Steel, Stainless Steel, Alloy Steel, Duplex, and Super Duplex Stainless Steel, with face types including RF, FF, RTJ, Tongue & Groove, and Male & Female. Manufactured to international standards such as ASME, EN, DIN, BS, JIS, ANSI, and ISO, our Weld Neck Flanges are widely used in oil & gas, petrochemical, power generation, offshore, marine, water treatment, pharmaceutical, fertilizer, and heavy engineering industries across India and worldwide.
| QUICK SPECIFICATION REFERENCE | |
|---|---|
| Flange Type | Weld Neck Flange (WNRF) |
| Size Range | NPS ½″ to 48″ (DN15 to DN1200) |
| Pressure Class | Class 150 · 300 · 400 · 600 · 900 · 1500 · 2500 |
| PN Rating | PN6 · PN10 · PN16 · PN25 · PN40 · PN64 |
| Standards | ASME B16.5 · ASME B16.47 Series A & B · EN 1092-1 · MSS SP-44 · JIS B2220 · AWWA C207 |
| Face Types | RF · FF · RTJ · LJF · M&F · T&G · LMF · SMF |
| Key Grades | A105 · A350 LF2 · A182 F304 · F304L · F316 · F316L · F51 · F91 |
| Production | Forged · Heat Treated · CNC Machined |
| Certifications | EN 10204 3.1 / 3.2 · NACE MR0175 · PMI · IBR |
| Surface Finish | Oil Black Paint · Anti-rust Paint · Zinc Plated · Hot Dip Galvanized (HDG) |
Overview
How Weld Neck Flanges Work
1
Long Tapered Hub
The hub taper distributes stress away from the weld plane, preventing fatigue failure under cyclic pressure, vibration, and thermal expansion loads.
2
Schedule-Matched Bore
Bore is machined to the exact pipe ID of the mating schedule (SCH 40 through 160/XXS), eliminating flow restriction, turbulence, and erosion at the joint.
3
Single Full-Penetration Weld
Only one butt weld is required between flange and pipe — fully radiographable by X-ray or UT, making WNRF the standard for NACE and nuclear code compliance.
4
Reliable Long-Term Performance
The welded joint provides excellent leak resistance and structural integrity, making Weld Neck Flanges ideal for high-pressure, high-temperature, and critical industrial applications.
PRICE TABLE
ASME B16.5 WNRF Flange Reference Price Chart
The prices listed above are indicative and subject to change based on quantity, material grade, and market conditions. For an accurate quotation on Weld Neck Flanges, please contact our sales team directly.
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| Sr. No. | Qty | Description | Price (USD) | Total |
|---|---|---|---|---|
| 1 | 45 | 2″ Class 150 XH RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $6.20 | $279.00 |
| 2 | 32 | 2″ Class 300 XH RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $9.40 | $300.80 |
| 3 | 80 | 2″ Class 600 XH RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $11.20 | $896.00 |
| 4 | 200 | 4″ Class 150 STD RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $12.90 | $2,580.00 |
| 5 | 35 | 4″ Class 300 XH RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $20.60 | $721.00 |
| 6 | 100 | 4″ Class 600 XH RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $42.80 | $4,280.00 |
| 7 | 60 | 4″ Class 600 SCH 160 RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $47.90 | $2,874.00 |
| 8 | 48 | 6″ Class 300 STD RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $34.20 | $1,641.60 |
| 9 | 10 | 8″ Class 600 STD RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $111.20 | $1,112.00 |
| 10 | 10 | 8″ Class 600 XH RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $111.20 | $1,112.00 |
| 11 | 10 | 10″ Class 300 STD RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $145.36 | $1,453.60 |
| 12 | 30 | 12″ Class 150 STD RF Weld Neck Flange, Carbon Steel ASTM A/SA105 | $85.50 | $2,565.00 |
Note: Prices are indicative only and provided for reference purposes. Final pricing may vary depending on material grade, pressure class, dimensions, quantity, testing requirements, coatings, and current raw material costs. Contact Manibhadra Metals for the latest pricing, bulk order discounts, and customized quotations.
REFERENCE DATA
Weld Neck Flange (WNRF) Weight Chart
ASME B16.5 Stainless Steel Weld Neck Flange Weight Chart In KG
Note: WN = Weld Neck Flange, S/O = Slip On Flange, B/K = Blind Flange. All values are approximate weights in kilograms (kg).
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| Nom Pipe Size |
150# | 300# | 600# | 900# | 1500# | 2500# | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | WN | |
| 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 | – | – | – | – | – |
SPECIFICATION TABLE
ASME B16.5 WNRF Flange Specifications Chart
Manibhadra Metals manufactures ASME B16.5 Weld Neck Flanges (WNRF) in India to all major international standards including ASME, ANSI, DIN, EN, BS, JIS, ISO, API, MSS, and AWWA, ensuring complete compliance for high-pressure, high-temperature, and critical industrial piping applications worldwide.
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| Parameter | Details |
|---|---|
| Size Range | ½″ (15 NB) to 48″ (1200 NB) • DN10 to DN5000 |
| Weld Neck Flange Standards | ANSI / ASME B16.5, ASME B16.47 Series A & B, ASME B16.48, BS 4504, BS 10, EN 1092-1, DIN, GOST, MSS SP-44, ISO 7005-1, JIS B2220, BS 1560, API 605, API 6A, AWWA C207 and custom drawings |
| ANSI Pressure Rating | Class 150, 300, 600, 900, 1500 and 2500 |
| DIN / PN Rating | 6 Bar, 10 Bar, 16 Bar, 25 Bar, 40 Bar • PN6, PN10, PN16, PN25, PN40 and PN64 |
| JIS Rating | 5K, 10K, 16K, 20K, 30K, 40K and 63K |
| UNI / EN Rating | 6 Bar, 10 Bar, 16 Bar, 25 Bar and 40 Bar |
| Coating / Surface Treatment | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent Coating, Cold Galvanized and Hot Dip Galvanized |
| Common Types | Forged, Threaded, Screwed, Plate, Reducing and Orifice Weld Neck Flanges |
| Test Certificates | EN 10204 3.1 / 3.2, Raw Material Certificate, 100% Radiography Test Report, Third Party Inspection Report, NACE MR0103 and NACE MR0175 |
| Production Technique | Forged, Heat Treated and CNC Machined |
| Face Types | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Small Male-Female (SMF), Lap Joint Face (LJF), Small Tongue, Large Tongue & Groove and Groove |
| Special Design | Manufactured as per customer drawing, project specification and custom requirements |
| Configurations | Standard, Equal, Reducing and Custom Configurations |
| Testing Methods | Direct-reading Spectrograph, Hydrostatic Testing Machine, X-ray Detector, Ultrasonic Flaw Detector and Magnetic Particle Detector |
| Manufacturing Equipment | Press Machine, Bending Machine, Pushing Machine, Electric Bevelling Machine and Sand Blasting Machine |
| Available Standards | ANSI, ASME, DIN, GOST, JIS, UNI, BS, AS 2129, AWWA, EN, SABS, NFE, API and MSS standards |
| BS Standards | BS 4504, BS 3293, BS 1560 and BS 10 |
| AS 2129 Standards | Table D, Table E and Table H |
| ANSI / MSS Standards | ANSI B16.5, ANSI B16.47 Series A & B, ANSI B16.36, ANSI B16.48, MSS SP-44, ASA, API 605, AWWA and custom drawings |
| DIN Standards | 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 and DIN 2638 |
| Other Standards | AWWA C207, EN 1092-1, GOST 12820, JIS B2220, KS B1503, SABS 1123, NFE 29203 and UNI 2276 |
| Applications | Bitumen Upgraders, Heavy Oil Refineries, Nuclear Power Plants, Petrochemical Plants, Acid Processing Units and High-pressure Piping Systems |
| Export Countries | Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, UAE and Peru |
| Material Test Certificates | MTC as per EN 10204 3.1 and EN 10204 3.2, with certificates for NACE MR0103 and NACE MR0175 on request |
PRODUCT VARIANTS AND SPECIFICATIONS
Weld Neck Flange Material Types & Configurations
Manibhadra Metals manufactures ASME B16.5 Weld Neck Flanges (WNRF) in Carbon Steel, Stainless Steel, Alloy Steel, Duplex, Super Duplex, and Nickel Alloys. Available in RF, RTJ, PN, Class, and custom configurations to international ASME, ANSI, DIN, EN, BS, JIS, MSS, and AWWA standards.
ASME B16.5 RTJ WNRF — A182 F316L · 14″ · Class 900
14″ ASTM A182 F316L Weld Neck RTJ Flange manufactured to ASME B16.5, Class 900. Designed for high-pressure and high-temperature piping systems with superior sealing performance and supplied with EN 10204 3.1 MTC.
ASME B16.5 WNRF — A182 F316 · 10″ · Class 600 · RF
10″ ASTM A182 F316 Stainless Steel Weld Neck Raised Face Flange, Class 600, manufactured to ASME B16.5 with SCH 80 bore for critical industrial piping and corrosion-resistant applications.
ANSI B16.5 WNRF — A182 F304 · 12″ · Class 150 · RF
12″ ASTM A182 F304 Stainless Steel Weld Neck Flange with Raised Face, Class 150. Manufactured to ANSI/ASME B16.5 for reliable butt-weld connections in process and utility piping.
ASME B16.47 Series A WNRF — A105 · 12″ · Class 300
12″ Carbon Steel ASTM A105 Weld Neck Flange manufactured to ASME B16.47 Series A with SCH 60 bore and Class 300 rating for large-diameter pipeline applications.
ASME B16.47 Series B RTJ WNRF — 10″ · Class 900 · SCH 80
10″ ASME B16.47 Series B Weld Neck Ring Type Joint Flange, Class 900, SCH 80, engineered for severe pressure, offshore, refinery, and petrochemical service.
ASME B16.5 WNRF — A105 · DN65 · Class 150 · SCH 40
DN65 ASTM A105 Carbon Steel Weld Neck Flange with Raised Face, Class 150 and SCH 40 bore. Suitable for general-purpose industrial piping and pressure vessel applications.
ASME B16.5 WNRF — A105N · 26″ · Class 600 · SCH XS
26″ ASTM A105N Weld Neck Flange, Class 600, SCH XS with Raised Face design. Manufactured for heavy-duty process piping requiring exceptional strength and durability.
EN 1092-1 WNRF — A105N · 10″ · Class 600
10″ ASTM A105N Weld Neck Flange manufactured to EN 1092-1 and ASME B16.5 standards with SCH STD bore for high-pressure industrial and pipeline installations.
EN 1092-1 WNRF — A182 F304L · 24″ · PN16
24″ ASTM A182 F304L Stainless Steel Weld Neck Flange, PN16 equivalent, SCH 10 with Raised Face design for water treatment, chemical processing, and utility piping.
Forged Reducing WNRF — A182 S32750 · Class 150
Forged Super Duplex ASTM A182 S32750 Reducing Weld Neck Flange, Class 150, designed for corrosion-resistant service and smooth pipe size transitions in critical process systems.
AWWA C207 WNRF — A105 · 10″ · Class 300
10″ ASTM A105 Carbon Steel Weld Neck Flange manufactured to AWWA C207 and ASME standards with SCH STD bore for water transmission and municipal pipeline projects.
MSS SP-44 WNRF — A182 F316L · 2½″ · SCH 80S
2½″ ASTM A182 F316L Stainless Steel Forged Weld Neck Flange manufactured to MSS SP-44 with SCH 80S bore for high-integrity piping systems requiring superior corrosion resistance.
Materials
Weld Neck Flange Material Grades
Manibhadra Metals manufactures ASME B16.5 Weld Neck Flanges in Carbon Steel, Stainless Steel, Duplex, Super Duplex, Nickel Alloys, Titanium, Monel, Inconel, Hastelloy, Copper Alloys, and other special materials to meet global industrial standards and project specifications.
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| Material | Available Grades / Specifications |
|---|---|
| Carbon Steel Weld Neck Flange | ASTM A105, ASTM A105N, ASTM A350 LF2, ASTM A694 F52/F56/F60/F65/F70/F80, ASTM A216 WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619 |
| Stainless Steel Weld Neck Flange | ASTM A182 F304, F304L, F316, F316L, ASTM A351 CF8, CF3, CF8M, CF3M, DIN 1.4301, 1.4306, 1.4401, 1.4404, 1.4308, 1.4408, 1.4409 |
| Copper Weld Neck Flange | C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910, C10920, C11000, C12200, C14500, C17200, C23000, C26000, C27000, C70600, C71500 and other copper grades |
| Copper Nickel Weld Neck Flange | ASTM SB61, SB62, SB151, SB152, Copper Nickel 90/10 (C70600), Copper Nickel 70/30 (C71500), UNS C71640 |
| Brass Weld Neck Flange | H59, H62, C3602, C2604 and other brass grades |
| Alloy Steel Weld Neck Flange | ASTM A182 F5, F9, F11, F12, F22 and F91 |
| Titanium Weld Neck Flange | ASTM B381 / ASME SB381, Grade 1, Grade 2, Grade 4, Grade 5, Grade 7, Grade 9 and Grade 12 Titanium |
| Inconel Weld Neck Flange | ASTM B564 / ASME SB564, Inconel 600, 601, 625, 690, 718, X-750 and 783 |
| Alloy 20 Weld Neck Flange | ASTM B462 / ASME SB462, Alloy 20, Carpenter® 20 and Alloy 20Cb-3 |
| Aluminium Weld Neck Flange | Aluminium 2017, 5052, 6061, 6063, 7075 and other aluminium grades |
| Nickel Weld Neck Flange | ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205 and Nickel 205LC |
| Hastelloy Weld Neck Flange | ASTM B564 / ASME SB564, Hastelloy C22, C276, C4, C2000, B2, B3 and Hastelloy X |
| Monel Weld Neck Flange | ASTM B564 / ASME SB564, Monel 400 (UNS N04400) and Monel K500 (UNS N05500) |
| Duplex Stainless Steel Weld Neck Flange | ASTM A182 F51, F52, F53, F55, S31803 and S32205 |
| Super Duplex Weld Neck Flange | ASTM A182 F53, F55, F57, F59, F60, F61, UNS S32750 and UNS S32760 |
| Incoloy Weld Neck Flange | ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT, 825 and 925 |
| 254 SMO Weld Neck Flange | ASTM A182 / ASME SA182, UNS S31254 (6Mo), DIN 1.4547 |
| Nimonic Weld Neck Flange | Nimonic 75, Nimonic 80A and Nimonic 90 |
| Other Materials | Tin Bronze, Aluminium Bronze, Lead Bronze and other special alloys available on request |
Note: Manibhadra Metals manufactures and supplies ASME B16.5 Weld Neck Flanges in Carbon Steel, Stainless Steel, Alloy Steel, Duplex, Super Duplex, Nickel Alloys, Titanium, Monel, Inconel, Hastelloy, Copper Alloys and other special materials. Flanges are produced to ASME, ANSI, EN, DIN, BS, JIS, ISO, API and MSS standards with EN 10204 3.1/3.2 certification available on request.
DIMENSIONS TABLE
ASME B16.5 Socket Weld Flange Dimensions
ASME B16.5 dimensional data is provided in both inches and millimetres (mm). Select the required pressure class below.
NOTE:
(1) When these flanges are required with a Flat Face (FF), either the full thickness or the thickness with the raised face removed may be furnished. Please note that removing the raised face will make the length through the hub non-standard.
(2) This dimension refers to the large end of the hub, which may be straight or tapered for threaded, slip-on, socket weld, and lap joint flanges.
(3) Socket Weld Flange bore sizes are available in SCH 10, SCH 20, SCH 30, STD, SCH 40, SCH 60, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, and XS.
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DIMENSIONS TABLE
ANSI B16.5 Weld Neck Flanges 150 Dimensions Chart
The dimensions listed above are based on ANSI/ASME B16.5 Class 150 Weld Neck Flanges. Bore size depends on the matching pipe schedule, while all other dimensions are specified in millimetres (mm)
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| 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.
DIMENSIONS TABLE
ASME B16.5 Weld Neck Flanges Class 300 Dimensions Chart
The dimensions listed above are based on ANSI/ASME B16.5 Class 300 Weld Neck Flanges. Bore size depends on the matching pipe schedule, while all other dimensions are specified in millimetres (mm)
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| 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: All dimensions are in millimetres (mm) and comply with ANSI/ASME B16.5 Class 300 Weld Neck Flange standards. The bore (F) is dependent on the mating pipe schedule.
DIMENSIONS TABLE
ASME B16.5 Weld Neck Flanges Class 400 Dimensions Chart
The dimensions listed above are based on ANSI/ASME B16.5 Class 400 Weld Neck Flanges. Bore size depends on the matching pipe schedule, while all other dimensions are specified in millimetres (mm)
☎ +91 99200 79735 / +91 88504 42758 | ✉ info@manibhadrametals.in
| 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: All dimensions are in millimetres (mm) and comply with ANSI/ASME B16.5 Class 600 Weld Neck Flange standards. The bore (F) is dependent on the mating pipe schedule.
DIMENSIONS TABLE
ASME B16.5 Weld Neck Flanges Class 600 Dimensions Chart
The dimensions listed above are based on ANSI/ASME B16.5 Class 600 Weld Neck Flanges. Bore size depends on the matching pipe schedule, while all other dimensions are specified in millimetres (mm)
☎ +91 99200 79735 / +91 88504 42758 | ✉ info@manibhadrametals.in
| 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 |
Note: All dimensions are in millimetres (mm) and conform to ANSI/ASME B16.5 Class 600 Weld Neck Flange specifications. The bore dimension (F) varies according to the mating pipe schedule.
DIMENSIONS TABLE
ASME B16.5 Weld Neck Flanges Class 900 Dimensions Chart
The dimensions listed above are based on ANSI/ASME B16.5 Class 900 Weld Neck Flanges. Bore size depends on the matching pipe schedule, while all other dimensions are specified in millimetres (mm)
☎ +91 99200 79735 / +91 88504 42758 | ✉ info@manibhadrametals.in
| 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 |
Note: All dimensions are in millimetres (mm) and conform to ANSI/ASME B16.5 Class 900 Weld Neck Flange specifications. The bore dimension (F) varies according to the mating pipe schedule.
DIMENSIONS TABLE
ASME B16.5 Weld Neck Flanges Class 1500 Dimensions Chart
The dimensions listed above are based on ANSI/ASME B16.5 Class 1500 Weld Neck Flanges. Bore size depends on the matching pipe schedule, while all other dimensions are specified in millimetres (mm)
☎ +91 99200 79735 / +91 88504 42758 | ✉ info@manibhadrametals.in
| 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: All dimensions are in millimetres (mm) and conform to ANSI/ASME B16.5 Class 1500 Weld Neck Flange specifications. The bore dimension (F) varies according to the mating pipe schedule.
DIMENSIONS TABLE
ASME B16.5 Weld Neck Flanges Class 2500 Dimensions Chart
The dimensions listed above are based on ANSI/ASME B16.5 Class 2500 Weld Neck Flanges. Bore size depends on the matching pipe schedule, while all other dimensions are specified in millimetres (mm)
☎ +91 99200 79735 / +91 88504 42758 | ✉ info@manibhadrametals.in
| 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: All dimensions are in millimetres (mm) and conform to ANSI/ASME B16.5 Class 2500 Weld Neck Flange specifications. The bore dimension (F) varies according to the mating pipe schedule.
DIMENSIONS TABLE
JIS Weld Neck Flange Dimensions
| Nominal Dia. |
Steel Pipe O.D. |
Inside Dia. do |
Flange O.D. D |
Thickness t |
Total Length T |
Hub Dia. a |
Hub Dia. b |
Face | Radius r |
Raised Face Dia. |
Bolt Circle | No. of Holes |
Hole Dia. h |
Bolt Size | WN Weight (kg) |
SOH Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 0.60 | 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 | – | – |
Note: All dimensions are in millimetres (mm). Approximate weights are shown for WN and SOH flange types where available. The unrelated ovulation calculator text has been removed.
DIMENSIONS TABLE
ANSI B16.5 Weld Neck Flange Schedule Chart
WELDING NECK FLANGES BORES (in inchines)
☎ +91 99200 79735 / +91 88504 42758 | ✉ info@manibhadrametals.in
| Nom Pipe Size |
Outside Dia. |
Schedule 10 |
Schedule 20 |
Schedule 30 |
STD Wall |
Schedule 40 |
Schedule 60 |
Extra Strong |
Schedule 80 |
Schedule 100 |
Schedule 120 |
Schedule 140 |
Schedule 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 |
| 1¼″ | 1.660 | 1.442 | – | – | 1.380 | 1.380 | – | 1.278 | 1.278 | – | – | – | 1.160 | 0.896 |
| 1½″ | 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 |
| 2½″ | 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 |
| 3½″ | 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 | – | – | – | – | – | – |
Note: All bore values are in inches. Blank values are shown as “–”. Bore selection depends on nominal pipe size and pipe schedule.
DIMENSIONS TABLE
ASME B16.5 Stainless Steel Weld Neck Flange Weight Chart In KG
| Nom Pipe Size |
150# | 300# | 600# | 900# | 1500# | 2500# | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | WN | |
| 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 | – | – | – | – | – |
Note: WN = Weld Neck Flange, S/O = Slip On Flange, B/K = Blind Flange. All values are approximate weights in kilograms (kg) as per ANSI / ASME B16.5 flange dimensions.
DIMENSIONS TABLE
ANSI B16.5 Weld Neck Flange Tolerances
Manibhadra Metals manufactures and supplies ANSI/ASME B16.5 Weld Neck Flanges within specified dimensional tolerances for outside diameter, bore, contact face, hub, drilling, thickness, and hub length, ensuring reliable fit-up and compliance for critical industrial piping systems.
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| Dimension | Flange Feature | Tolerance |
|---|---|---|
| A | Outside Diameter |
When O.D. is 24″ or less: ±1/16″ (1.6 mm) When O.D. is over 24″: ±1/8″ (3.2 mm) |
| D | Inside Diameter |
10″ and smaller: ±1/32″ (0.8 mm) 12″ through 18″: +1/8″ (3.2 mm) 20″ and larger: −1/16″ (1.6 mm) |
| B | Diameter of Contact Face |
1/16″ Raised Face: ±1/32″ (0.8 mm) 1/4″ Raised Face, Tongue & Groove, Male & Female: ±1/64″ (0.4 mm) |
| J | Diameter of Hub at Base |
When hub base is 24″ or smaller: ±1/16″ (1.6 mm) When hub base is over 24″: ±1/8″ (3.2 mm) |
| H | Diameter of Hub at Welding Point |
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) |
| P | Drilling |
Bolt circle: ±1/16″ (1.6 mm) Bolt-hole spacing: ±1/32″ (0.8 mm) |
| P | Eccentricity of Bolt Circle with Respect to Facing |
2½″ and smaller: ±1/32″ (0.8 mm) maximum 3″ and larger: ±1/16″ (1.6 mm) maximum |
| C | Flange Thickness |
18″ and smaller: +1/8″ (3.2 mm), −0″ 20″ and larger: +3/16″ (4.8 mm), −0″ |
| K | Length of Hub |
10″ and smaller: ±1/16″ (1.6 mm) 12″ and larger: ±1/8″ (3.2 mm) |
Note: The tolerances shown above apply to ANSI/ASME B16.5 Weld Neck Flanges. Final dimensions should be verified against the latest applicable standard, approved project drawings, material grade, pressure class, and customer specification.
RANGE TABLE
Explore Our Complete Range of Weld Neck Flanges
Explore Our Complete Range of ASME B16.5 Weld Neck Flanges Available in Multiple Materials, Standards, Pressure Ratings, and Industrial Configurations.
☎ +91 99200 79735 / +91 88504 42758 | ✉ info@manibhadrametals.in
| Category | Available Types / Specifications |
|---|---|
| ASME / ANSI Weld Neck Flanges | ASME B16.5 Weld Neck Flanges, ANSI B16.5 Weld Neck Flanges, WNRF Flanges, ASME B16.5 WNRF Flanges, ANSI 150 Weld Neck Flanges |
| EN / DIN Standards | EN 1092-1 Weld Neck Flanges, Welding Neck Flange EN 1092, DIN 86029 Weld Neck Flanges, Table E Weld Neck Flanges, BS10 Table E Weld Neck Flanges |
| Stainless Steel Flanges | Stainless Steel Weld Neck Flanges, ASTM A182 SS Weld Neck Flanges, SS Weld Neck Flanges, Stainless Steel Weld Neck Orifice Flanges |
| Carbon Steel Flanges | Carbon Steel Weld Neck Raised Face Flanges, ASTM A105 WNRF Flanges, Carbon Steel RF Flanges |
| Alloy & Special Materials | Alloy Steel Weld Neck Flat Face Flanges, Duplex Steel RTJ Flanges, Inconel Weld Neck Raised Flanges, ASTM A182 Reducing Weld Neck Flanges |
| RTJ & Ring Joint | Weld Neck RTJ Flanges, WNRF RTJ Flanges, Ring Type Joint Weld Neck Flanges, Groove Weld Neck Flanges |
| Pressure Ratings | Class 150, Class 300, Class 600, Class 900, Class 1500, ANSI 150, PN10, PN16, PN40 |
| JIS Standards | JIS 10K Weld Neck Flanges, JIS 16K Weld Neck Flanges, JIS 20K Weld Neck Flanges |
| Pipe Schedules | SCH 40 Weld Neck Flanges, SCH 80 Weld Neck Flanges |
| Configurations | Reducing WNRF Flanges, Threaded Weld Neck Flanges, Face Weld Neck Flanges, Blind Weld Neck Flanges, Slip-On Weld Neck Flanges, Pipe Weld Neck Flanges |
| Dimensions & Data | WNRF Flange Dimensions, WNRF Weight Chart, WNRF Price List |
We Have Extensive Experience In Supplying Welding Neck Flange EN 1092 & Weld Neck RTJ Flange In India
| Category | Available Types / Specifications |
|---|---|
| ASME / ANSI Flanges | ASME B16.5 Weld Neck Flanges, ANSI B16.5 Weld Neck Flanges, WNRF Flanges, ANSI 150 Weld Neck Flanges |
| Material Grades | Stainless Steel Weld Neck Flanges, Carbon Steel Weld Neck Flanges, Alloy Steel Weld Neck Flanges, Weld Neck Flange Material |
| EN / BS Standards | EN 1092-1 Weld Neck Flanges, Welding Neck Flange EN 1092, Table E Weld Neck Flanges, BS10 Table E Weld Neck Flanges |
| Special Flanges | Weld Neck RTJ Flanges, Weld Neck Blind Flanges, ASTM A182 Reducing Weld Neck Flanges, Duplex Steel RTJ Flanges |
| Industrial Types | Stainless Steel Weld Neck Orifice Flanges, Carbon Steel Raised Face Flanges, DIN 86029 Weld Neck Flanges |
| Pipe & Connection Types | 4 Inch Weld Neck Flanges, Weld Neck Pipe Flanges, Weld Neck Slip-On Flanges, 150 LB Weld Neck Flanges |
| JIS Flanges | JIS 10K Weld Neck Flanges, JIS 16K Weld Neck Flanges, JIS 20K Weld Neck Flanges |
| Pressure Classes | WNRF Class 150, WNRF Class 300, WNRF Class 600, WNRF Class 900 |
| Additional Configurations | WNRF Blind Flanges, WNRF BLRF Flanges, WNRF Flange Dimensions, WNRF Weight Chart |
| Commercial Information | WNRF Price List, SS Weld Neck Flanges, Weld Neck Flanges |
TYPES
Explore Other Types Of Flanges
Discover a complete range of flange designs engineered for different pressure classes, piping systems, and industrial applications.
KNOWLEDGE BASE
Frequently Asked Questions
What is a Weld Neck Flange?
A Weld Neck Flange (WNRF) is a forged pipe flange with a long tapered hub that is butt-welded to the pipe. This design provides superior strength, excellent stress distribution, and high resistance to pressure and temperature fluctuations. Manibhadra Metals manufactures ASME B16.5 Weld Neck Flanges for demanding industrial piping applications.
Why choose ASME B16.5 Weld Neck Flanges?
ASME B16.5 Weld Neck Flanges are manufactured to internationally recognized dimensional and pressure standards, ensuring compatibility, safety, and reliable performance in high-pressure piping systems. Manibhadra Metals supplies ASME B16.5 Weld Neck Flanges in Class 150, 300, 600, 900, 1500, and 2500.
What materials are available for Weld Neck Flanges?
Manibhadra Metals manufactures Weld Neck Flanges in Carbon Steel, Stainless Steel, Duplex Steel, Super Duplex Steel, Alloy Steel, Inconel, Monel, Hastelloy, Nickel Alloy, Titanium, Copper Nickel, Aluminium, Brass, and other special alloys to suit various industrial applications.
What pressure classes are available for Weld Neck Flanges?
Our ASME B16.5 Weld Neck Flanges are available in:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
We also manufacture PN-rated, DIN, EN, and JIS standard Weld Neck Flanges.
What is the difference between Weld Neck Flanges and Slip-On Flanges?
Weld Neck Flanges are butt-welded to the pipe and feature a tapered hub that minimizes stress concentration, making them suitable for high-pressure applications. Slip-On Flanges are easier to install but are generally recommended for lower-pressure systems.
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