GOST Flanges

Handling critical pipelines under varying pressures becomes risky when flange standards mismatch with Russian system designs. Our GOST flanges match exact specifications for PN6 to PN160 ranges, preventing sealing failures and misalignment.

Standard Specification

GOST 12820-80 (Flat Face), GOST 12821-80 (Weld Neck), GOST 12822-80 (Loose)

Pressure Rating

PN6 to PN160 (1-25 MPa) [GOST 26349-84]

Material

Carbon Steel (GOST 1050-88), Stainless Steel (GOST 5632-72), Titanium (GOST 19807-91)

Nominal Size

DN10 to DN1600 (½” to 64″) [GOST 28338-89]

Flange Type

01 (Flat), 02 (Raised), 03 (Weld Neck), 04 (Loose), 05 (Threaded)

Product Description

Using unmatched flanges often causes frequent downtime, gasket leaks, or severe structural issues. Our manufacturing aligns material grades, surface finishes, and dimensions according to GOST norms for reliable long-term performance.

Facing Type

Type A (Smooth), Type B (Serrated), Type E (RTJ) [GOST 12815-80]

Dimensions

GOST 12815-80 Tables (Thickness, OD, Hub dimensions)

Bolt Circle Diameter

GOST 12815-80 Table 1 (e.g., DN100 PN16: 210mm)

Number & Size of Bolt Holes

GOST 12815-80 Table 2 (e.g., DN100 PN16: 8×M16)

Surface Finish

3.2μm Ra (GOST 2789-73), Groove finish Rz≤40μm (GOST 25142-82)

Corrosion Resistance

GOST 9.306-85 (coatings), GOST 9.908-85 (stainless grades)

Temperature Rating

-70°C to +600°C (GOST 356-80)

Material Certification

GOST 16523-97 (steel), GOST 24297-2013 (material verification)

Gasket Compatibility

GOST 15180-86 (paronite), GOST 481-80 (rubber)

Coating/Plating

GOST 9.306-85 (zinc), GOST 9.301-86 (anodizing)

Manufacturing Method

GOST 8479-70 (forging), GOST 977-88 (castings), GOST 19903-74 (sheet steel)

Technical Advantages

Process connections demand strict compliance with system pressure ratings, material codes, and surface finishes. Our GOST flanges meet each factor by using carbon steel, stainless steel, or titanium according to GOST standards. 
Surface roughness and facing profiles ensure proper gasket compression and long service life in hostile environments. Wide dimensional range from DN10 to DN1600 fits diverse project needs without local modifications.

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Need reliable Flanges for your next project? Get in touch with us today, and we’ll help you find exactly what you need!

Industry Applications

Oil and Gas Plants

Connects high-pressure flow lines securely under thermal cycling and corrosive environments. 

Petrochemical Refineries

Joins complex systems without mismatches in bolt patterns or sealing faces. 

Heavy Equipment Manufacturing

Assembles hydraulic and pneumatic systems using forged or cast GOST flanges.

Thermal Power Stations

Secures water, steam, and fuel pipelines operating across wide temperature ranges. 

Shipbuilding and Marine Systems

Maintains structural integrity against shock loads, salt spray, and pressure fluctuations.

Chemical Processing Units

Supports high-pressure chemical transfer without risks of gasket blowouts or joint failures. 

Piping Joints for Demanding Industrial Projects

Pipeline failures due to improper flange fittings can stop entire plant operations. We produce GOST flanges from verified steels that resist corrosion, fatigue, and high pressure. 
All gasket compatibility, bolt hole dimensions, and coating requirements match Russian and CIS regional expectations. Buyers avoid rework or late-stage design issues by sourcing from manufacturers with full GOST certification. 

Having Doubts? Our FAQ

Check all our Frequently Asked Question

Are GOST flanges compatible with non-Russian pipeline systems?

GOST flanges follow unique dimensions, bolt patterns, and pressure ratings compared to DIN, ANSI, or JIS standards. Mixing GOST with other systems often leads to sealing failures or bolt misfits. Our team provides exact drawings to verify compatibility before supply. 

What materials do you use for different pressure classes of GOST flanges?

We manufacture PN6 to PN160 flanges using carbon steel GOST 1050-88, stainless GOST 5632-72, or titanium GOST 19807-91. Material selection depends on service medium, pressure level, and corrosion risk. Buyers can choose based on project-specific fluid, temperature, and environment. 

Can you provide GOST flanges with special coatings for offshore or corrosive environments?

Yes, we offer coatings like zinc plating (GOST 9.306-85) and anodizing (GOST 9.301-86) for additional corrosion resistance. Surface treatments comply strictly with Russian standards for durability in aggressive zones. Coating selection depends on site salt exposure, chemicals, or humidity levels. 

How do you verify the dimensional accuracy and pressure class of GOST flanges?

Each flange batch passes dimensional checks as per GOST 12815-80 tables and pressure testing if required. We provide dimensional inspection reports and material certificates like GOST 24297-2013. Buyers get assurance that flanges match project needs without rework risks. 

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LOCATIONS

Global Sales Office

818, Preakness lane, Coppell, Texas, USA – 75019

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Other Locations

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GOST Flanges

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GOST Flanges

Need reliable Machining for your next project? Get in touch with us today, and we’ll help you find exactly what you need!

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