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ENGINEERING WORKS

Welding Neck Flanges

Welding Neck Flanges Manufacturer

Welding Neck Flanges Manufacturer

For high-pressure applications, the Welding Neck Flanges (WNRF) are often used. It’s crucial to state the purpose of the pipe when ordering a weld neck flange. This is so that the flange’s interior diameter can be matched to that of your pipe or fitting. This flange features a buttweld union with the pipe, and that joint, together with the tapered hub, make it very dishing resistant and a sturdy connection. Extreme temperature swings and settings where there may be a lot of bending and handling of the flanges make welding neck flanges desirable.

A transition from the integral flange thickness to the pipe or fitting thickness impacted by the taper is advantageous, and the long weld neck flange is easy to identify at the long-tapered hub. The weld neck flange is brought on by line expansion or other variable stresses. To ensure that there is no product flow restriction, these Stainless Steel Welding Neck Flanges are bored to match the inside diameter of the matching pipe or fitting end. This lessens erosion from the transition and prevents turbulence at the joint. 

Additionally, they offer a superb Long hub stress distribution and are simple to radiograph for problem diagnosis. A single full penetration, V weld will be used to attach the Long Weld Neck flange type to a pipe or fitting (Buttweld).

We at JK Engineering Works would like to take the opportunity to introduce as a leading Industrial Carbon Steel Welding Neck Flanges Exporter in India. Stainless Steel Welding Neck Flanges are stocked or available in the following range of materials and sizes for the oil, gas, petrochemical and allied industries. Pipes with Bleed Ring can be assembled and disassembled easily. Weld Neck Flanges can be forged or plate.

Welding Neck Flanges Specification

ASME B16.5 Weld Neck Flange Size Chart1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Weld Neck Flange StandardsANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, 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 Pressure Rating ANSIClass 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Weld Neck Flange
Weld Neck Flange Pressure Calculation in DIN6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Weld Neck Flange
JIS5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Welding Neck Flanges
UNI6Bar 10Bar 16Bar 25Bar 40Bar Welding Neck Flanges
EN6Bar 10Bar 16Bar 25Bar 40Bar Welding Neck Flanges
CoatingOil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Welding Neck Flanges
Most common types of Weld Neck FlangeForged / Threaded / Screwed / Plate
Test CertificatesEN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Production technique
  • Forged, Heat treated and machined
Connect Type/ Flange Face TypeRaised 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
Special design

As per your drawing

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

TestDirect-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
EquipmentPress machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
OriginIndian / West Europe / Japan / USA / Korean
Manufacturer of

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.
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175

Welding Neck Flanges Material

Prestige quality Welding Neck Flanges Manufacturer in India offer these Carbon Steel Weld Neck Flange in DIN, EN, BS, ISO, JIS or ANSI standard.

Carbon Steel Weld Neck FlangeASTM/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 FlangeASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel Weld Neck FlangeASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Titanium Weld Neck FlangeASTM 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
Copper Weld Neck FlangeT1, 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 FlangeASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Brass Weld Neck Flange3602 / 2604 / H59 / H62 / etc.
Inconel Weld Neck FlangeASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 Weld Neck Flange
Hastelloy Weld Neck FlangeASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flanges
Monel Weld Neck FlangeASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Alloy 20 Weld Neck FlangeASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3
Aluminium Weld Neck Flange5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel Weld Neck FlangeASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Duplex Weld Neck FlangeS31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex Weld Neck FlangeS32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy Weld Neck FlangeASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flanges
254 Smo Weld Neck FlangeASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547
Nimonic Weld Neck FlangeNimonic 75, Nimonic 80A, Nimonic 90
Other Weld Neck Flange materialTin bronze, Alumunum bronze, Lead bronze

Welding Neck Flanges Dimensions

Pipe Size

 

(NPS)

ASME-ANSI Class Dimension

 

A (Outside Diameter – IN)

B (Inside BORE-IN)
15030060090015002500
1/2–––––––
3/4–––––––
12 1/22 3/42 3/4333 1/41 1/8
1 1/43 2 7/83 1/83 1/83 3/8––1 1/2
1 1/23 1/43 5/83 5/83 3/43 3/44 1/21 5/8
244 1/44 1/45 1/25 1/25 5/82 1/8
2 1/24 3/4556 3/8–6 1/22 1/2
35 1/45 3/45 3/46 1/26 3/47 5/83 1/8
3 1/26 1/46 3/86 1/4–––3 5/8
46 3/477 1/288 1/89 1/84 1/8
57 5/88 3/89 3/89 5/89 7/810 7/85 1/8
68 5/89 3/410 3/811 1/41112 3/86 1/8
810 7/81212 1/21413 3/415 1/88
1013 1/414 1/815 5/8171718 5/810 1/8
121616 1/217 3/419 1/220 3/821 1/212
1417 5/81919 1/420 3/822 5/8–13 1/4
1615 1/421 1/82222 3/825 1/8–15 1/4
1821 1/223 3/8242527 5/8–17 1/4
2023 3/425 5/826 3/427 3/829 5/8–19 1/4
22–––––––
2428 1/830 3/83132 7/835 3/8–23 1/4
ANSI/ASME/ASA B16.5 300lb/sq.in. Flange WN-RF
øDbgmaJ*hkHoleslKg.
1/2″95,214,334,938,121,315,752,466,7415,90,900
3/4″117,515,942,947,626,720,857,182,5419,01,500
1″123,817,550,854,033,526,761,988,9419,01,900
1 1/4″133,319,063,563,542,235,165,198,4419,02,600
1 1/2″155,620,673,069,848,340,968,3114,3422,23,300
2″165,122,292,184,160,352,669,8127,0819,03,600
2 1/2″190,525,4104,8100,073,162,776,2149,2822,25,400
3″209,528,6127,0117,588,978,079,4168,3822,27,400
3 1/2″228,630,2139,7133,3101,690,281,0184,1822,28,900
4″254,031,7157,2146,0114,3102,485,7200,0822,211,900
5″279,434,9185,7177,8141,2128,398,4234,9822,216,000
6″317,536,5215,9206,4168,4154,298,4269,91222,220,200
8″381,041,3269,9260,3219,1202,7111,1330,21225,431,000
10″444,547,6323,4320,7273,0254,5117,5387,31628,644,300
12″520,750,8381,0374,6323,8304,8130,2450,81631,764,000
14″584,254,0412,7425,4355,6336,5142,9514,32031,788,000
16″647,757,1469,9482,6406,4387,3146,0571,52034,9113,000
18″711,260,3533,4533,4457,2438,1158,7628,62434,9134,000
20″774,763,5584,2587,4508,0488,9161,9685,82434,9171,000
22″838,266,7641,2641,2558,8539,7165,1742,92441,3195,000
24″914,469,8692,1701,7609,6590,5168,3812,82441,3238,000
*The data “J” corresponds to the STD schedule

 

ANSI/ASME/ASA B16.5 600lb/sq.in. Flange WN-RF
øDbgmJhkHoleslKg.
1/2″95,214,334,938,122,322,266,7415,90,800
3/4″117,515,942,947,627,725,482,5419,01,400
1″123,817,550,854,034,527,088,9419,01,600
1 1/4″133,320,663,563,543,228,698,4419,02,100
1 1/2″155,622,273,069,849,531,7114,3422,23,100
2″165,125,492,184,162,036,5127,0819,03,700
2 1/2″190,528,6104,8100,074,741,3149,2822,25,400
3″209,531,7127,0117,590,746,0168,3822,27,300
3 1/2″228,634,9139,7133,3103,449,2184,1825,48,900
4″273,038,1157,2152,4116,154,0215,9825,411,800
5″330,244,4185,7188,9143,860,3266,7828,624,500
6″355,647,6215,9222,2170,766,7292,11228,629,500
8″419,155,6269,9273,0221,576,2349,21231,743,000
10″508,063,5323,8342,8276,385,7431,81634,970,000
12″558,866,7381,0400,0327,192,1488,92034,986,000
14″603,269,8412,7431,8359,193,7527,02038,1100,000
16″685,876,2469,9495,3410,5106,4603,22041,3142,000
18″742,982,5533,4546,1461,8117,5654,02044,4175,000
20″812,888,9584,2609,6513,1127,0723,92444,4232,000
22″869,995,2641,2666,7564,4133,3777,92447,6292,000
24″939,8101,6692,1717,5615,9139,7838,22450,8330,000

 

Dimensional Tolerances of Welding Neck Flanges ASME B16.5

Outside Diameter
≤ 24 = 1.6 mm | > 24 = ± 3.2 mm		Inside Diameter
not applicable
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm		Outside Diameter of Hub
≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm
Diameter of Counterbore
not applicable		Drilling
Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle with Respect to Facing
≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max.
Thickness
≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0		Length thru Hub
≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm

 

ASTM Specification of Welding Neck Flanges

Carbon Steel Weld Neck Flange

  • A105 Weld Neck Flange

  Alloy Steel High-Temp Weld Neck Flange

  • A182 Gr F1 Weld Neck Flange
  • A182 Gr F11 Weld Neck Flange
  • A182 Gr F12 Weld Neck Flange
  • A182 Gr F22 Weld Neck Flange
  • A182 Gr F5 Weld Neck Flange
  • A182 Gr F9 Weld Neck Flange

 

  Alloy Steel Low-Temp Weld Neck Flange

  • A350 Gr LF2 Weld Neck Flange
  • A350 Gr LF3 Weld Neck Flange

 

  Austenitic Stainless Steel Weld Neck Flange

  • A182 Gr F304 Weld Neck Flange
  • A182 Gr F316 Weld Neck Flange
  • A182 Gr F321 Weld Neck Flange
  • A182 Gr F347 Weld Neck Flange
  • A182 Gr F304L Weld Neck Flange
  • A182 Gr F316L Weld Neck Flange
  • A182 Gr F317 Weld Neck Flange
  • A182 Gr F317L Weld Neck Flange
  • A182 Gr F321 Weld Neck Flange
  • A182 Gr F310 Weld Neck Flange
  • A182 Gr 347 Weld Neck Flange

 

  Nickel Alloy Weld Neck Flange

  • ASTM B564 Weld Neck Flange
  • astm b564 uns n06600 Weld Neck Flange
  • astm b564 uns n06625 Weld Neck Flange
  • astm b564 uns no4400 Weld Neck Flange
  • astm b564 uns n08810 Weld Neck Flange
  • astm b564 uns n08811 Weld Neck Flange
  • astm b564 uns n08825 Weld Neck Flange
  • astm b564 uns n04400 Weld Neck Flange
  • astm b564 uns n10276 Weld Neck Flange
  • astm b564 uns n10665 Weld Neck Flange

 

  Titanium Weld Neck Flange

  • astm b381 grade f2 Weld Neck Flange
  • astm b381 f5 Weld Neck Flange
  • astm b381 f3 Weld Neck Flange
  • astm b381 f12 Weld Neck Flange
  • astm b381 f7 Weld Neck Flange
  • Other grades: ASTM B381 F1, F2, F2H, F3, F4, F5, F6, F7, F7H, F9, F10, F11, F12, F13, F14, F15, F16, F16H, F17, F18, F19, F20, F21, F23, F24, F25, F26 , F26H, F27, F28, F29, F30, F31, F32, F33, F34, F35, F36, F37, F38 Weld Neck Flange

Type of Welding Neck Flanges we produce:

Weld Neck Class 150 FlangeWeld Neck Threaded Flange
Weld Neck Class 300 FlangeWeld Neck With 1/2 Npt Flange
Weld Neck Class 1500 FlangeWeld Neck With Threaded Hole Flange
Weld Neck Class 600 FlangeWeld Neck Weight 150#  Flange
Weld Neck Class 900 FlangeWeld Neck Rtj 1500 Flange
Weld Neck Class 2500 FlangeWeld Neck Ring Type Joint Flange
Weld Neck Pn16 FlangeWeld Neck Flat Face Flange
Weld Neck Pn10 FlangeWeld Neck Slip On Flange
Weld Neck Pn40 FlangeWeld Neck Rtj 900 Flange
Weld Neck Pn 160 FlangeWeld Neck Rtj Flange
Weld Neck Pn 64 FlangeWeld Neck Npt Flange
Weld Neck Dn150 Pn16 FlangeWeld Neck Jis 5k Flange
Weld Neck Din 2527 FlangeWeld Neck Jis B2220 Flange
Weld Neck Din En 1092-1 FlangeWeld Neck Jis 10k Flange
Weld Neck Din 2633 FlangeKf Weld Neck Flange
Weld Neck Din 2576 FlangeWeld Neck B16.47 Flange
Weld Neck Asme B16.5 Class 300 FlangeWeld Neck Ansi B16.5 150 Flange
Stock an extensive range of Weld Neck Flange, Carbon Steel Welding Neck Flanges Manufacturer in Mumbai, India.

Supplying Welding Neck Flanges to our worldwide clients:

JK Engineering Works s a Govt. approved certified Industrial Carbon Steel Welding Neck Flanges Exporter in India. All of our Stainless Steel Welding Neck Flanges Manufacturered and tested to international standards, and specifications as per DIN, JIS, EN, ASTM etc.
Stock an extensive range of Stainless Steel Welding Neck Flanges, Carbon Steel Welding Neck Flanges Wholesaler in Mumbai, India & We give you best Industrial Welding Neck Flanges Prices in Mumbai.
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JK Engineering works

JK ENGINEERING WORKS is one of the leading manufacturer & stockiest of Flanges Quality flanges, pipe fittings as per standard we are since 1996 in this field and supplying Good quality flanges, and pipe fittings. We would like to introduce ourselves as a manufacturer of MS Flanges (ISO certified).

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  • +91 7666989835
  • sales@jkengineeringworks.in
  • Plot No. A-10, Dhruv Logistic Park, MIDC Taloja, Koynavele Village, Taluka Panvel Navi Mumbai-410208
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