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Home > Products > GOST 12820 Flange > Weld Neck Flange WN Flange
Weld Neck Flange WN Flange
  • Weld Neck Flange WN Flange
  • Weld Neck Flange WN Flange
  • Weld Neck Flange WN Flange
  • Weld Neck Flange WN Flange
  • Weld Neck Flange WN Flange

Weld Neck Flange WN Flange

Unit Price: 3 USD
Min. Order: 10 Piece/Pieces

Product Description

Weld Neck Flange WN Flange

Brief Introduction:

Flanges are parts that connect pipes to each other, used for the connection between pipe ends, and also used for flanges on the inlet and outlet of equipment for the connection between two equipment. There are holes and bolts on the flange to connect the two flanges tightly. Any connecting parts that are bolted at the periphery of two planes and closed at the same time are generally called flanges.

Weld Neck Flange is also called Neck butt welding flange, is a kind of Pipe Fitting, which refers to a flange with a neck and a round pipe transition and connected to the pipe butt welding.

Types of Flange:


WN(welding-neck);SO(slip-on);PL(Plate);BL(Blind);TH(Threaded);SW(socket-welding);LF/SE(lapped flange/stub end);LWN(long welding neck);Orifice flange; Reducing flange; API Flange; Integral/Compact flange; Spectacle blind ,Lind spade and spacer, Paddle blind, Paddle spacer ;Orifice plate; Pipe plate ,Bleed ring.

Advantage of our company:

As a professional manufacturer of energy equipment, our product range is not only including heat exchanger, water chiller and cooling tower, but also including the accessories of seamless tube, flange, pipe fittings and so on. Our production line of accessories can meet our own demand as well as our customer's inquiry. We offer competitive price and stable quality for all of our product range.

We offer steel lap flanges with high tensile strength, raised faces and supports for easy installation. This connecting flange has high tensile strength and welding ability, which can meet a variety of industrial and commercial purposes. The use of high-quality alloys as raw materials makes our product range extremely durable with good corrosion resistance. We have standard sizes of lap joint flanges and can also be customized according to customer requirements.

Stainless steel material


ANSI B16.5/ B16.47/ B16.36/ API605, 6A, 6B/ MSS SP44/ AWWA C207
DIN 2527/ 2528/ 2561/ 2565/ 2566/ 2573/ 2576/ 2627/ 2630/ 86029/ 86030 etc.
JIS/KS 5K, 10K, 16K, 20K, 30K
UNI 2253/2254/2276-2278/2281-2284/6083/6084/6089-6093
GOST 12820/12821

Material Available:
Carbon steel (ASTM A105 A350LF2 LF3 A694 A36 Q235 A3 20# 45# 20Mn 16Mn Q345 etc.);
Stainless steel (SS316, SS304, SS316L, SS304L, SS321 SS317 F51 F53 316Ti etc.);
Alloy steel (A182F5 A182F11 F22 15CrMo 30CrMo 35CrMo 40CrMO 42CrMo 4130 4140 etc.)

PN: 1.0--------58.0

American Series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500

European Series: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400

Flange Facing Types:

Flat Face (FF), Raised face (RF), groove (G), female(F), ring joints face(RJ)

Surface treatment:

Transparent oil, rust-proof black oil or hot galvanized.


Fumigation pallet, plywood cases or customer special demands

Applications range:

Petroleum, chemical, power, gas, metallurgy etc.

Related Products:

Elbows, tees, reducers, pipe caps, flanges, seamless steel pipes, ERW, LSAW, and etc...

We will be happy to give you the quotation ASAP upon the receipt of your specific enquiries.

Guangdong Jiema Energy Saving Technology Co.,Ltd

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Guangdong Jiema Energy Saving Technology Co., Ltd. (hereinafter referred as Jiema) used to be called Guangzhou Jiema Heat Exchanger Co.,Ltd. It was established in 2005, it's a reliable enterprise which intergrates R&D, dessign, manufacturing, sales and after-service. Choose Jiema, you get a trustworthy partner!

Jiema is a direct manufacturer of Plate Heat exchanger, Shell And Tube Heat Exchanger, Air Heat Exchanger, and revelant Heat Exchanger Parts (Heat exchanger plate&gasket, U-tube, Seamless Pipe, Finned tube, Tube Sheet, Flange ) and so on. Other refrigerant equipment like Water Chiller and Cooling Tower are also our main products.

Jiema devoted to service to HVAC, chemical industry, food&drink, papermaking, pharmaceutical industry, smelting industry, power station and so on. Jiema`s product is not only popular in domestic market, but also warmly welcomed by the end users all around the world.

Except for basic heat exchanger products, Jiema pays high attention to environmental protection filed. Jiema`s unit of waste heat recovery and wast gas or waste water treatment have helped a lot of factories to deal with their headaches which bothered them for years. Their efficient equipment helped to get cleaner water, fresher air, lower cost and high recognition of the country and government.

As a leader of volume heat exchanger and pressure vessel in China, Jiema obtained the manufacturing license qualification of pressure vessel (Class1&2) earlier than other factories, which is a high threshold for other small manufacturers.

Until now Jiema has 2 production lines located in Nansha district, Guangzhou and Xiaochi, Hubei. In 2011, Jiema Invested 2 billion at Xiaochi Industry Zone, Huanggang City of Hubei province, to build Jiema Industrial Park, covering an area of more than 70,000m³, including comprehensive heat exchanger and related spart parts.

With 17 years development, Jiema has improved its production ability as well as R&D strength. It obtains more than 40 patents for utility models, and more than 10 patents for invention for different types of heat exchangers. Jiema is also cooperating with top universities in China and has set up a heat transfer research institute in head office. In the future, Jiema would not only be a leader of technology and research&development, but also a standard setter and profession range pole for heat exchange industry!

Jiema has strong technical background, and owns a large number of engineering and technical personnel who work on the design of heat exchange equipment, thermal system and environmental protection recovery system for many years. With rich practical experience in various industrial and civil applications, these professionals can provide accurate, reliable and high-efficiency system solutions and use corresponding heat exchanger equipment according to the actual requirements of customers.

Adhering to the enterprise philosophy of [Build the company on integrity and achieve success on quality" and the idea of [Constant development and continuous innovation", Jiema provides products with better performance at lower price and high quality services for users.

Company Info
  • Company Name: Guangdong Jiema Energy Saving Technology Co.,Ltd
  • Product/Service: Plate Heat Exchanger , Shell And Tube Heat Exchanger , Air Heat Exchanger , Water Chiller , Shell and Plate Heat Exchanger , Cooling Tower
  • No. of R&D Staff: 21 -30 People
  • No. of QC Staff: 11 -20 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): 10,000-30,000 square meters
  • Factory Location: Xiaochi Industrial Park, Huangmei County, Huanggang City, Hubei Province, China
  • Contact Person: Ms. Abby
  • Tel: +86-020-82453507
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