HEBEI DIDLINK INDUSTRY CO., LTD

Our GOST blind flanges are manufactured strictly in line with GOST standards, featuring a solid disc design that provides reliable sealing for pipe ends, equipment outlets, or pipeline branches. This structure ensures excellent pressure resistance and leak-tight performance, effectively preventing media leakage and external contamination. With precise machining, excellent structural stability and strong adaptability, they are ideal for bulk orders and customized requirements in Russian and CIS low-to-high pressure industrial pipe systems.

1. Product Specifications
Category

Options & Details

Standard

GOST 12820, GOST 12821, GOST 12822 (PN 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3 MPa)

Material

Carbon Steel (St3sp, St3ps, 20G), Stainless Steel (08X18H10T, 12X18H10T), Alloy Steel (12X1MF, 15XM)

Nominal Diameter (DN)

DN 10 - DN 300 (standard); Custom sizes for special pipe configurations

Pressure Rating (PN)

PN 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3 MPa (varies by material and thickness)

Sealing Face Type

Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), Male-Female Face (MF)

Surface Treatment

Hot-Dip Galvanized (HDG), Electro-Galvanized (EG), Anti-Rust Oil Coating, Pickling & Passivation

Certifications

ISO 9001, SGS, BV, GOST, DIN

2. Application Range
Oil & Gas Industry: Russian oilfield pipeline terminals, natural gas storage tank outlets, Siberian energy project pipeline sealing, wellhead equipment end caps

Petrochemical & Chemical: CIS chemical reactor outlets, solvent storage tank sealing, intermediate pipeline shut-off, corrosion-resistant media system end caps

Power Generation: Russian thermal power plant boiler auxiliary pipe sealing, steam pipeline branches, cooling water system end caps, hydropower station auxiliary system sealing

Marine & Shipbuilding: Baltic and Black Sea shipyard hull pipeline terminals, marine engine cooling system sealing, offshore platform water supply pipeline end caps

General Industry: CIS factory water treatment equipment outlets, HVAC system pipeline shut-off, food processing equipment end caps, hydraulic system sealing

3. Core Advantages
Strict compliance with GOST standards, ensuring interchangeability with Russian and CIS low-to-high pressure pipe systems and flange connections

Precision CNC machining for uniform dimensions and tight sealing, minimizing leakage risks

Diversified material and pressure rating options to adapt to high-temperature, high-pressure, and corrosive environments

Solid disc structure with high-pressure resistance, suitable for various media scenarios including gas, liquid and steam, ensuring long-term sealing reliability

Factory-direct supply with bulk inventory, supporting fast delivery and customized labeling.