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GOST 12821-80 STEEL Q235 FLANGE refers to flanges with neck, which are interlocked with pipe and welded to pipe. Butt welding flanges are not deformed, well sealed, widely used, with corresponding rigid and elastic requirements and reasonable butt welding thinning transition.

1.Specification of GOST 12821-80 STEEL Q235 FLANGE


Carbon steel: ASTM A105,ASTM A350 LF1,LF2,CL1/CL2,Q235A   
Stainless steelASTM A 182, ASTM A240 304, 304L, 304H, 309, 310, 310S, 316, 316Ti, 316 S33, 316L, 317, 317L, 321, 347, 347H, 409, 410, 410S, 420, 430

Alloy steel 16mn

StandardGOST/ANSI/ DIN/ EN/ BS/ UNI/ AS/ Gost/ JIS
SurfaceRust-proof oil, Black, Yellow, Galvanized    
TypeWeld Neck,Socket weld,Blind,Threaded,Slip on,plate flange and special types
Flange facingRaised face , Flat face, Ring Joint face,etc    
SizeDN10-DN2000,  1/4"~240"
Process Free forging, plate cutting    
PressureANSI: 150bls-2500bls / ANSI:Table B-E, DIN:PN2.5-PN160, Free forging, plate cutting,etc
PackageWooden case,Cartons, Pallets or crates according to buyer's requirements.    
Delivery 7~15 days  after advanced payment
ApplicationsSteam, air, gas and oil pipes or for many other fluids 

2.Quality showing of GOST 12821-80 STEEL Q235 FLANGE

Quality showing of GOST 12821-80 STEEL Q235 FLANGE

3.Production Facility of GOST 12821-80 STEEL Q235 FLANGE

Production Facility of GOST 12821-80 STEEL Q235 FLANGE

4.Insection Equipment of GOST 12821-80 STEEL Q235 FLANGE

Insection Equipment of GOST 12821-80 STEEL Q235 FLANGE


Q:If you make parts wrong, do you refund money?

A:If the parts are wrong, we will return your money or we can make correct parts to you again.  

Q:Can I get free samples?

A: Yes, we can provide you the free sample, but you need to bear their own delivery costs.

Q: Can I request to change the form of packaging and transportation?

A:Yes, We can change the form of the packaging and transportation according to your request, but you have to bear their own costs incurred during this period and the spreads.

Q:Can I request to advance the shipment?

A: It should be depends on whether there is sufficient inventory in our warehouse.

Q:Can I have my own Logo on the product?

A: Yes, you can send us your drawing and we can make your logo, but you have to bear 
their own the cost.

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