Welding Neck Flanges

Your Professional Welding Neck Flanges Supplier

Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Convenient transportation, abundant coal and power resources, fast communication and superior environment. Mainly produce flanges and forgings of various specifications. Application in piping installation, pressure vessel, equipment accessories.

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Why Choose Us

Our Service
With strong technical force, advanced production technology, perfect quality inspection, and reliable after-sales service, it provides a basis for supervision and cooperation for many customers at home and abroad.

Our Certificate
The company Excellent Supplier of 2019 Safety production standardization certificate Quality management system certification.

Production Market
The products are mainly exported. It is exported to Europe, America and other countries and regions. The product quality is good, and the service is attentive. It is deeply appreciated and trusted by customers and users at home and abroad, and has won a high reputation. They have become one of the largest flange and forging suppliers in China.

Our Factory
Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Convenient transportation, abundant coal and power resources, fast communication and superior environment.

Types of Welding Neck Flanges

Flat Face Weld Neck Flanges
Imagine this as a flat pancake; these are what these flanges look like. They don’t have any raised areas, just an even surface. These are ideal when simplicity is needed as opposed to extra frills for a clean uncomplicated connection.

Long Weld Neck Flanges
They got extended necks like giraffes which allow you to weld them onto pipes from far away. These come in handy if there’s need for some space between flange and pipe.

Reducing Weld Neck Flanges

Think of these as middlemen: they help connect different sized pipes or fittings. One side is bigger, the other one smaller-they’re like bridges between two worlds!

Compact Weld Neck Flanges

These ones have shorter necks and smaller bolt circle diameters so they will not take too much room compared to standard ones when space is limited.

Ring Type Joint (RTJ) Weld Neck Flanges

These are the heavy ones; they are used in high pressure, high temperature situations; they have a groove where a metal ring gasket goes.

Standard Specification For Welding Neck Flanges

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

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, F706

Low Temperature Carbon Steel Weld Neck Flanges :

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)

Application Of Welding Neck Flanges

Ansi B16.5 Class2500 Welding Neck Flanges

Ansi B16.5 Class300 Welding Neck Flanges

Ansi B16.5 Class150 Welding Neck Flanges

High-Pressure Systems
Have you ever been near a system where the pressure is so intense that it can be felt? Here’s when weld neck flanges come to play. They act as containment super heroes in areas such as oil and gas, power generation and chemical processing.

High-Temperature Environments
Think of places like steam systems or industrial furnaces where things get too hot. Weld neck flanges can take the heat. Being joined by welding means they will not collapse thus ensuring operations are continuous.

Critical Process Pipelines
This is when weld neck flanges comes in handy. These flanges go a long way in making sure that things do not go haywire.

Corrosive Environments
Some places are just mean to equipment since chemicals inside them eat away everything they touch.

Structural Integrity Requirements
Do you ever wonder how those huge structures remain upright? This is where weld neck flanges come into play.

Specialized Applications
And let’s not forget specialized cases when we need weld neck flanges like cryogenic systems or aerospace applications for instance .

Customized Weld Neck Flanges Process

Size

Specified pipeline size, including flange ID and OD, thickness, bolt hole diameter, bolt hole distance, etc.

Material

Using specified material suitable for pipeline engineering according to your requirements.

Shape

Can be customized with irregular flanges such as square flanges and conical flanges, etc.

Connection

Threaded connection, welding connection, socket welding connection, etc., which can be selected.

Special Treatment

Special treatments such as surface coatings and anti-corrosion can be made according to your needs.

Customization Process For Welding Neck Flanges

01/

Requirements Confirmation
Communicate in detail to determine the requirements for flange size, material, pressure, connection method, etc.

02/

Design Drawings
Our professional engineers will design flange drawings for you. The drawings will specify the size, shape, thickness, etc. of the flange in detail.

03/

Choose Materials
Select suitable flange materials according to the requirements of the engineering project.

04/

Customer Confirmation
Send detailed information, such as the designed drawings and materials, to the customer for confirmation.

05/

Processing Sample
To ensure accuracy, first produce a sample according to the drawings and selected materials and send it to the customer for trial confirmation.

06/

Production Of Bulk Goods
After confirming the accuracy of the samples, proceed with mass production.

Ansi B16.5 Class1500 Welding Neck Flanges

Welding Neck Flanges Packing

Packaging: Weld Neck Flanges are packaged with caution and safety so they reach our client’s as good as they would expect.

FAQ

Q: What Are The Materials Of The Weld Neck Flange?

A: The most common materials for weld neck flange are stainless steel, carbon steel and alloy steel.

Q: What Are The Applications Of Weld Neck Flange?

A: The weld neck flange is suitable for pipelines with a high sealing requirement at a nominal pressure of 0.25-4MPa.

Q: What Is The Installation Method Of Weld Neck Flange?

A: The installation steps of weld neck flange are as follows: preparation, cleaning the flange surface, installing the sealing gasket, centering the flange and pipe fittings, spot welding to fix the flange initially, full welding to ensure that the sealing surface and pipe fittings are completely adhering to each other, checking whether the connection is solid and there is no leakage, and then finish the work.

Q: What Are The Advantages Of A Welded Flange?

A: The weld neck flange is cost-effective, easy to fabricate, has good sealing and can be used in places with high pressure.

We're well-known as one of the leading welding neck flanges manufacturers and suppliers in China. If you're going to wholesale high quality welding neck flanges with competitive price, welcome to get more information from our factory. Also, customized service is available.

raised neck flange