GOST/ГОСТ 12836-67 Blind Flange Steel Plug PN6–PN100

We are a professional manufacturer of GOST/ГОСТ 12836-67 FLANGE FORGED PN1.6MPa, PN16 in China.

GOST 12836-67 Steel Blind Flange Plug is a Russian standard pipeline component used to seal or close the end of flanged piping systems and pressure vessels. Designed in accordance with GOST 12836-67, this blind flange plug is suitable for PN6 to PN100 pressure ratings and ensures secure sealing under industrial operating conditions.

It is widely applied in oil & gas, petrochemical, power generation, and heavy industrial pipelines across Russia and international markets.

GOST 12836-67 Standard

GOST 12836-67 specifies technical requirements for blind flange plugs used in bolted flange connections. The standard defines:

• Nominal diameter (DN)

• Pressure ratings (PN series)

• Dimensional tolerances

• Material grades

• Manufacturing requirements

Blind flange （Steel plugs ）manufactured under this standard are compatible with corresponding GOST flanges.

Pressure Ratings

Available pressure classes:

• PN6

• PN10

• PN16

• PN25

• PN40

• PN63

• PN100

Higher pressure ratings can be customized upon request.

ТЕХНИЧЕСКИЕ ХАРАКТЕРИСТИКИ

Available Materials

Carbon Steel

• Steel 20

• 09G2S

Stainless Steel

• 12X18H10T

• 08X18H10

Alloy Steel

• 12X1MФ

• 15X5M

Material selection depends on operating temperature, pressure, and corrosion requirements.

Manufacturing Process

• Forged steel blank

• Precision machining

• Bolt hole drilling

• Surface finishing

• Anti-corrosion treatment (if required)

Forged construction provides improved strength and durability for high-pressure systems.

Testing & Inspection

To ensure compliance with GOST 12836-67, all blind flange plugs undergo:

Material Testing

• Chemical composition analysis

• PMI testing

Mechanical Testing

• Tensile testing

• Hardness testing

Dimensional Inspection

• Outside diameter measurement

• Bolt circle verification

• Thickness inspection

Certification

• EN 10204 3.1 / 3.2 available

• Third-party inspection upon request

Applications

GOST 12836-67 steel blind flange plugs are widely used in:

• Oil & gas pipelines

• Refinery systems

• Pressure vessels

• Steam systems

• Industrial process lines

They are essential components for safe pipeline termination and system isolation.

GOST 12836-67 Steel Blind Flange Plug PN6–PN100 provides reliable sealing performance for industrial piping and pressure vessel systems. Manufactured in accordance with Russian standards and available in multiple material grades, it ensures durability, strength, and compliance in demanding applications.

Contact us today for technical support and a competitive quotation.