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Stainless Steel Pipe Neck Butt-welding Flange

Stainless Steel Pipe Neck Butt-welding Flange

    Min. Order: 10 Piece/Pieces
    Transportation: Ocean,Land,Air,Express
    Place of Origin: China
    Port: China Sea-port,Railway station,Airport

Product Description

Neck butt welding flange

Welding neck flange (WN for short);
Neck butt welding flange, also known as neck flange, butt welding flange, high neck flange, flange plate, etc;
The flange plate with neck butt welding belongs to a kind of flange series; It refers to the flange with neck and circular pipe transition and butt welded with the pipe;

Features of neck butt welding flange
Beautiful appearance, smooth surface, acid and alkali resistance, anti-corrosion, strong texture performance;
The butt welding flange is not easy to deform, has good sealing performance and is widely used;

There are corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition. The distance between the welded junction and the joint surface is large, and the joint surface is free from welding temperature deformation;

It is applicable to pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature. It is generally used for the connection of pipelines and valves with PN greater than 2.5MPa;

At the same time, it is also used in the pipeline conveying expensive, flammable and explosive media;

Characteristics and features
DN15-DN4000
Pressure level
PN2. 5~PN400
Sealing surface type
Raised face neck butt welding flange (RF);
Full plane neck butt welding flange (FF);
Concave convex neck butt welding flange (MFM);
Concave neck butt welding flange (FM);
Convex neck butt welding flange (m);

Tenon and groove face neck butt welding flange (TG);
Among them, concave convex face and neck butt welding flange (MFM) belongs to supporting use;

Material of flange plate with neck butt welding
Carbon steel flange: ASTM a105,20#, Q235, 16Mn, ASTM A350, LF1, LF2, CL1 / Cl2, LF3, CL1 / Cl2, ASTM a694, F42, F46, F48, F50, f52, f56, F60, F65, F70;
Stainless steel flange: ASTM A182 f304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;
Alloy steel: ASTM A182 F1, f5a, F9, F11, F12, F22, F91, a182f12, a182f11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12cr2mo1, A335P22, ST45 8/Ⅲ;

Executive standard
Ministry of chemical industry standards: Hg / t20592-2009, Hg / t20615-2009;
National standard: GB / t9115 1-2000,GB/T9115. 2-2000,GB/T9115. 3-2000,GB/T9115. 4-2000;
Standard of mechanical department: JB / t86 2-94;
Marine Standard: CB / t47-1999;
American Standard: ANSI B16 5,ASME B16. 47;

Connection form
The neck butt welding flange is used to weld the neck nozzle with the steel pipe, and the other side is fixed with bolts and nuts;

Production process
Pure material forging and rough material forging (second) are applicable to neck butt welding flange and flange plate;
The forging process of our company is to place the forging blank on the forging die after full welding;
The basic process of die forging die forging process: blanking, heating, pre forging, final forging, punching skin, trimming, tempering, shot peening;
Common processes include upsetting, drawing, bending, punching and forming;
Common die forging equipment include die forging hammer, hot die forging press, flat forging press and friction press.

Generally speaking, the quality of forged flange is better. It is generally produced by die forging, with fine crystal structure and high strength. Of course, the price is also more expensive;

Advantages and disadvantages of neck butt welding flange
Advantages: the neck butt welding flange is suitable for high-pressure pipeline, with high pressure resistance, good sealing performance, no deformation, acid and alkali resistance, anti-corrosion and strong texture performance;
Disadvantages: the price is relatively expensive;

Procurement proposal
1: It is recommended to purchase from a regular flange manufacturer, which needs a certain production scale;
2: The flange manufacturer needs to provide the material test report and other relevant data of the neck butt welding flange;
3: The neck butt welding flange needs to have corresponding specification and model steel seal and identification;



Flanges include: forged steel flanges of carbon steel, alloy steel, low-temperature steel, stainless steel, dual phase steel and nickel base alloy, steel forgings for various boilers and pressure vessels, as well as various machinery and ship forgings.

Flange plates include plate flat welding flange, butt welding flange, neck flat welding flange, neck butt welding flange, loose sleeve flange, large mechanical flange, pressure vessel flange, socket flange, screw flange, flange cover, spectacle blind plate, pipe plate, plug, manhole, wind power flange, pipe flange and CNC precision flange.

Our partners specialize in flanges including the standards - ANSI; DIN; BS; UNI; JIS; SABS1000/3, also the custom design. It owns forging and casting factory which is well-equipped, and has a severe system for the quality control, which covers every process of the manufacturing ( raw material inspection, cutting, heating, gorging, heat treatment, machining, drilling, marking, washing, final inspection, packing, delivery).

We can provide the flanges(Forged Flange,Carbon Steel Flange, Weld Neck Flange, Slip on Flange, Blind Flange, Plate Flange, Threaded Flange, Non-Standard Flange, Socket Weld Flange) with the DN15mm-DN1500mm in the professional level and our main products include PL,SO,WN,BLD.in standards - ANSI; DIN; BS: UNI; JIS; SABS1000/3. Furthermore, we do custom design as well.

Henan Youlong Petroleum Engineering Technology Co.,Ltd

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Henan Youlong petroleum Engineering Technology Co.,Ltd., Located in the beautiful petroleum city - Puyang City in the zhongyuan oil filed located, is a production research and development enterprise with product research and development organizations and perfect service teams, mainly engaged in the management, research and development of petroleum drilling and well repair equipment, special oilfield equipment, oil extraction equipment, wellhead and down hole tools, and the provision of petroleum engineering design schemes and petroleum engineering technical services.

And also our Leading groups mainly engaged in oil and gas industry nearly more than 40 years.

Our main products and Service are as following:

* Oilfield equipment production and supply : Cementing and Fracturing Equipment, Gate Valve and wellhead Christmas Tree, Plunger Pumps and Mud Pumps, Flow line Products, Solid Control Equipment, Drilling Rigs and Work over Rigs Matching Equipment etc.

* Engineering & workers supply to oilfield site.

* With Professional Teams experienced in the maintenance of drilling machinery,TDS,SCR equipment, we can undertake pumping unit oil well on-site management services.Long-term supply accessories of drilling rigs,work over rigs,mud pump and beam pumping unit, and distribute drill pipe, drill collar, casing, tubing, special drill pipe sub etc...


If you are interested in our Company or products, Please feel free contact us!


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Introduction Pic

Company Info

  • Company Name: Henan Youlong Petroleum Engineering Technology Co.,Ltd
  • Representative: Tian Zongfeng
  • Product/Service: Cementing and Fracturing Equipment , Gate Valve and wellhead Christmas Tree , Plunger Pumps and Mud Pumps , Flowline Products , Solid Control Equipment , Drilling Rigs and Workover Rigs Matching Equipment
  • Capital (Million US $): 6000000RMB
  • Year Established: 2019
  • Total Annual Sales Volume (Million US $): US$5 Million - US$10 Million
  • Export Percentage: 61% - 70%
  • Total Annual Purchase Volume (Million US $): US$5 Million - US$10 Million
  • No. of Production Lines: 200
  • No. of R&D Staff: 11 -20 People
  • No. of QC Staff: 5 -10 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): 10,000-30,000 square meters
  • Factory Location: No. 41, Zhongyuan West Road,Puyang,Henan,China
  • Contact Person: Mr. Jason
  • Tel: +86-393-8417400
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