GOST 12821 Welding Flange

Payment Type: L/C,T/T,D/P,Paypal,Money Gram,Western Union
Min. Order: 1 Bag/Bags
Delivery Time: 3 Days

Basic Info

Model No.: DN10-DN2000

Standard: DIN, ANSI, GOST, GOST 12821

Type: Welding Flange, GOST 12821 Welding Flange

Material: Carbon Steel

Structure: Flanges

Connection: Welding

Sealing Surface: RF

Manufacturing Way: Forging

Certification: ISO.UKS.SGS.BV

Package: Wooden Boxes, Wooden Pallets

Brand Name: HAOYUAN

Crafts: Cold Extrusion, Thermoforming, Forging

Nominal Pressure: Pn0.1-Pn20

Application: Water Conservancy, Electric Power, Power Station

Materials: Ct20,09G2S,15XSND,17Q1S.

Size: DN10-DN2000

Additional Info

Packaging: Wooden boxes, Wooden pallets

Productivity: 20T/Day


Transportation: Ocean,Land,Air

Place of Origin: CANGZHOU

Supply Ability: 500T/Month

Certificate: ISO

Product Description

We are a manufacture of steel pipe fittings  , we can produce kinds of Elbow 
Pipe Fitting,Pipe Fitting Eccentric Reducer,Pipe Cap,Steel Reducing Tee 
,Carbon Steel Flange and so on .Steel Flange is including Blind 
Flange,Welding Neck Flange,Slip-On Flange,Long Weld Neck Flange,Weld 
Flange and so on .

Now the field of application of the flange is more and more widely, but not for professionals to choose the right flange is very difficult, just to face so many flange standards, such as large caliber Blue and Russian standard flange and American standard flange, of course, some of the British standard flange manufacturers and other manufacturers are like a variety of. We are not very clear. So let me take the Russian standard flange as an example. Explain it
Sealing surface form: protrusion (RF), concavo-convex (MFM), tongue and groove (TG), ring connection (RJ)
Material: Carbon Steel: 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 (Stainess Steel): 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;
Manufacturing standards: ANSI B16.5, HG20619-1997, GB / T9117.1-2000-GB / T9117.4-200, HG20597-1997
Connection: flange nut, bolt connection
Production process: professional forging, forging manufacturing and so on
Processing methods: high-precision CNC lathe turning, general lathe fine car, welding and other processing
Applications: Boiler and pressure vessels, petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, stamping elbow food and other industries.

High-quality products

weld neck flange

2 pipe flange

flanged pipe fittings

Welded neck flange not easy to  distortion, good sealing, widely used, butt thinning transition weld joints ,horn shape, avoid shape change when welding in high temperature. applicable to high temperature pipeline, high pressure and low temperature pipeline, normally used to connect  pipes and valves which PN is greater than 2.5MPa; also used to transport expensive, flammable, explosive media pipeline.

Our packaging

slip on flange


Flange fittings

Steel Flange Production Process                      

Flange production process



Steel Flange workshop


Flange production

ansi b16 5 flange

carbon steel flange

steel pipe flange

Production Process

Sales Network

Contact Info



Address: Yanshan County,Cangzhou,Hebei

Contact Person: YIN



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