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Weld Neck Flanges Manufacturers in India

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WNRF Flange & Weld Neck Flanges Manufacturers, Suppliers & Exporter Mumbai, India


Fitwel Industries LLP is one of the pioneering Weld Neck Flanges manufactures, suppliers, and exporter in Mumbai India. These ASME B16.47 WNRF Flanges is usually available in a raised face, flat face, or RTJ facing Types. ASME B16.5 Weld Neck Flanges attach by welding the pipe to the neck of the flange which transfers stress from the flange to the pipe instead. Welding Neck Flanges are easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting. WNRF Reducing Flange is often used for applications where high pressure is a factor.

Inside diameter of the Inconel weld neck raised flange is designed to match the pipe's inside diameter, We use high-quality raw material to produce it and offers them at competitive prices to our customers in order to satisfy their specific needs. A Weld Neck Flange manufactured in two designs. The regular type of Api 6A Weld Neck Flange is used with the pipe. Hence, this ASME B16.5 Weld Neck Flange is used in the process plants. weld neck flanges manufacturers in india is suitable for use in hostile environments, as they can withstand extremes of temperature, pressure, or other sources of stress. The long tapered hub provides an important reinforcement for use in several applications involving high pressure, sub-zero and / or elevated temperatures. The smooth transition from flange thickness to pipe or fitting wall thickness effected by the taper is extremely beneficial, under conditions of repeated bending, caused by line expansion or other variable forces. These Weld Neck Flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radiographed for flaw detection.

Fitwel Industries LLP is a specialised manufacturer of high quality ASME/ANSI/DIN standard weld neck flanges in India. We offer immediate delivery programs for standard size of carbon steel weld neck flanges and stainless steel weld neck flanges. We also offer these products at customized sizes and shapes to our respected clients. We Export Weld Neck Flanges in Qatar, Kingdom Of Bahrain, Saudi Arabia, Indonesia, United States, Singapore, Malaysia, Turkey, UAE, Russia, Ukraine, South Africa, Australia, etc.

What is weld neck flanges?

A weld neck flange (also known as a high-hub flange and tapered hub flange) is a type of flange. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

What is WNRF flange?

What is Weld Neck Flanges ? The Welding Neck Flanges (WNRF) are often used for high-pressure applications. To order a weld neck flange, it is important to specify the pipe is being used for. This is because the inside diameter of the flange will match the inside diameter of your pipe or Fitting.

Where do use a welding neck flange?

Weld neck flanges are used in applications where the conditions are severe and critical. Some of these conditions include high pressure, wide fluctuations in temperature and pressure, high temperature, fluids that are volatile and hazardous, and temperatures in the sub-zero range.

What is a long weld neck flange?

The long neck guides the pipe into the flange itself and provides reinforcement that a standard weld neck flange cannot. Typically, the long weld neck flange are the anchors for water-mains or sources of gas being pumped into a larger network of pipes, such as those in a factory or in an apartment building.

How are weld neck flanges made?

A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

Among the most widely used flanges are Welding Neck, As usual, the characteristics of this flange are very specific, differing from others in their use and application. The WN flange is very durable and has good sealing ability, and is used very frequently in high-pressure piping systems.

The welding neck flange: What is it, and what is it used for?

Among the different types of flanges that there are, we find the Welding Neck Flange, a flange very commonly used to seal pipes in the petrochemical industry.

Characteristics of welding neck flanges

These flanges are distinguished by a long, conical neck, the end of which is welded to the pipe. The internal diameter of the pipe is equal to that of the flange, which provides a generally constant sectional flow without interruptions or turbulence in the gases/liquids circulating in the pipe. Welding neck flanges provide high structural strength along with stress distribution.

Another factor to consider is that attention must be paid to the joint between the neck and the tube it is welded to, in order to avoid turbulence in high-speed flows.

What kind of materials are to manufacture them?

The materials used for this type of flange are quite varied, but will always depend on theenvironmental conditions andstress they will have to withstand.

  • Carbon steel
  • Alloy steel
  • Stainless steel
  • Titanium
  • Nickel alloys
  • Etc.

For moderate temperatures, carbon flanges are usually used.If, on the other hand, they are going to withstand muchmore extreme conditions of temperature or pressure, alloy steel is used. Finally, for flanges that need to be resistant to corrosive gases or liquids, alloys with metals such as nickel, chrome or molybdenum are ideal.

Types of single flange gasket faces

When talking about flanges for pipes we must also consider the different standard-manufactured faces for flange junctions that we have to choose from. The most common types in the industry are:

  • FF – Flat Face
  • RF – Raised Face
  • MFF – Male/Female Face
  • TGF – Tonge and Groove Face
  • RJF – Ring Joint Face
  • LJF – Lap Joint Face

*Dimensions and materials given by ASME B16, ASME B16.47 and MSS SP-44 standards.

Fitwel Industries LLP weld neck flanges

At Fitwel Industries LLP, we offer a wide variety of forged flanges. In our catalog you will see parts in a huge range of sizes (from 1/2 to 102 inches), different pressure ranges and many different alloys.

We know that each engineering project has very specific characteristics. Therefore, in addition to our wide variety of parts, we also design, engineer and produce custom-made flanges based on the needs of each client.

ASME B16.5 Weld Neck Flanges Specification :

Standard : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings

Size : 1/2" (15 NB) to 48" (1200NB)

Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.

Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

BS : BS4504 , BS4504, BS1560, BS10

DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673


ANSI B16.47 Weld Neck Flanges Material & Grades:

Stainless Steel Weld Neck Flanges : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L

Duplex & Super Duplex Steel Weld Neck Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61, 2205 (UNS No. S31803), 2507 (UNS No. S32750)

Carbon Steel Weld Neck Flanges : ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F70, ASTM A350, LF2, LF3

Alloy Steel Weld Neck Flanges : ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Nickel Alloy Weld Neck Flanges : ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020).

Copper Alloy Steel Weld Neck Flanges : UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30)


All Classes Dimensions of Weld Neck Flanges

Slip On flange

All dimensions are in "mm" unless noted otherwise.


Pressure Classes

NPS DIA
D
THK
B
DIA
A
DIA
OD
HEIGHT
H
DIA
K
DIA
L
1/2 3.75 0.56 1.5 0.84 2.06 2.62 5/8
3/4 4.62 0.62 1.88 1.05 2.25 3.25 3/4
1 4.88 0.69 2.12 1.32 2.44 3.5 3/4
5.25 0.81 2.5 1.66 2.62 3.88 3/4
6.12 0.88 2.75 1.9 2.75 4.5 7/8
2 6.5 1 3.31 2.38 2.88 5 3/4
7.5 1.12 3.94 2.88 3.12 5.88 7/8
3 8.25 1.25 4.62 3.5 3.25 6.62 7/8
9 1.38 5.25 4 3.38 7.25 1
4 10 1.38 5.75 4.5 3.5 7.88 1
5 11 1.5 7 5.56 4 9.25 1
6 12.5 1.62 8.12 6.63 4.06 10.62 1
8 15 1.88 10.25 8.63 4.62 13 1.1/8
10 17.5 2.12 12.62 10.75 4.88 15.25
12 20.5 2.25 14.75 12.75 5.38 17.75 1.3/8
14 23 2.38 16.75 14 5.88 20.25 1.3/8
16 25.5 2.5 19 16 6 22.5
18 28 2.62 21 18 6.5 24.75
20 30.5 2.75 23.12 20 6.62 27 1.5/8
24 36 3 27.62 24 6.88 32 1.7/8


Slip On flange
NPS NO OF
BOLT
HOLES
DIA
STUD
BOLTS
LENGTH
STUD
BOLTS
1/2 4 1/2 3
3/4 4 5/8 3.5
1 4 5/8 3.5
4 5/8 3.75
4 3/4 4.25
2 8 5/8 4.25
8 3/4 4.75
3 8 3/4 5
8 7/8 5.5
4 8 7/8 5.5
5 8 7/8 5.75
6 12 7/8 6
8 12 1 6.75
10 16 1.1/8 7.5
12 16 8
14 20 8.25
16 20 1.3/8 8.75
18 24 1.3/8 9
20 24 9.5
24 24 10.5
Notes:

  • Dimensions are in inches unless otherwise indicated.
  • The length of the Stud Bolt does not include the height of the chamfers (points).
  • ID = Depending on the wall thickness of the pipe, must be specified by the purchaser.


  • Call@ 9987994248 High quality ASME/ANSI/DIN standard weld neck flanges manufacturer, suppliers & exorter in Mumbai, Pune, Ahmedabad, India, Chennai. WNRF Flanges are easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting.

    Other Names: ANSI B16.5 Weld Neck Flanges, WNRF Flanges, Weld Neck Flange Class 150, WNRF Flange Class 150

    Material: Stainless Steel, Carbon Steel, Duplex & Super Duplex Steel, High Nickel Alloy, Hastelloy & Titanium

    Brand: Fitwel Industries LLP

    Manufacturer: Fitwel Industries LLP

    Suppliers & Exporter: Fitwel Industries LLP

    Rating: 4.2/5 based on 42 customer reviews

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    We Supply Weld Neck Flanges For Various Application Industry Like :

    Oil & Gas Industries

    Petrochemical Industries

    Engineering Industries

    Chemical Industries

    Sugar Industries

    Power Generation Industries

    Fertilizers Industries

    Food Processing Industries