GOST Flange
Factory Direct Sales
Kaysuns is one of the leading GOST flange providers in China.We manufacture carbon steel and stainless steel flanges,including but not limited to slip on flanges (GOST 12820),weld neck flanges (GOST 12821),and threaded flanges (GOST 12836).
Applications of GOST Flange
- Chemical Processing:Systems for transporting corrosive substances.
- Power Generation:Power plants including nuclear and thermal power generation.
- Shipbuilding and Maritime:Hull piping and marine engine systems in ship engineering.
- Oil, Gas, and Petrochemical Industries:Offshore drilling,refineries,and pipelines transporting hydrocarbons.
- Industrial Maintenance and Piping Engineering:Pulp and paper industries,for pipe terminations,reducers,or seals.
- Water Supply and Sewage Systems:Municipal water supply pipelines,filtration systems,and fire protection pipelines.
GOST Flange Materials
- Carbon Steel:
Russian Grade:3сп,20,25.
ASTM/ASME Equivalent Grades:ASTM/ASME A/SA 105,ASTM A350 LF2, A694 F42,F52,F60,F65,F70. - Stainless Steel:
Russian Grade:12Х18Н10Т.
ASTM/ASME Equivalent Grades:ASTM A182 Gr.F304, F304L, F316, F316L, F316Ti,F310,F321,F347,904L.
- Alloy Steel:
Russian Grade:09Г2С,10Г2,15Х5М.
ASTM/ASME Equivalent Grades:ASTM/ASME A/SA 182 & A 387 Gr. F1, F5, F9, F11, F12, F22, F91. - Other Materials:
Duplex Steel / Super Duplex Steel:
ASTM A182 F51 / S31803 , F53 / S32750, F55 / S32760.
Nickel Alloys:Monel 400 ,Inconel 600, 625, 825, Hastelloy C276.
Dimensions and Pressure
The size range spans from DN15 to DN1600 (1/2“ to 48”). Their rated pressures include PN6, PN10, PN16, PN25, PN40, up to PN160.
Key Difference of GOST and Other Standard Flanges
GOST flanges belong to the European system, with pipe diameters (DN) and flange dimensions typically specified in metric units. In contrast, American standards ASME/ANSI commonly use imperial inches.
GOST flanges utilize metric (millimeter) pipe diameters and pressure ratings (PN).Their bolt hole spacing,flange outer diameter,and sealing face structure differ from other standards,making them incompatible for interchangeable use.
GOST pressure ratings are denoted by PN, such as PN16, PN25, PN40, etc. This differs from the American Class 150/300 designation.
How does Kaysuns ensure the quality of GOST flanges?
- Test chemical composition, mechanical properties, and dimensions (bolt holes, flange thickness, and sealing surfaces) to ensure compliance with GOST grade requirements.
- Employ ultrasonic, magnetic particle, or liquid penetrant testing to identify hidden defects, internal cracks, or voids.
- Inspect flange faces for scratches, dents, or irregularities that may compromise sealing performance.
- Conduct hydrostatic or pneumatic pressure testing to confirm flanges withstand their rated pressure.
- Verify all flanges are correctly marked with pressure rating, dimensions, material, and standards, accompanied by material test certificate documentation.
FAQs on GOST Flanges Procurement
We accept payment via wire transfer (T/T),which we believe benefits both parties and reduces bank processing fees.For larger amounts,we also accept irrevocable letters of credit (L/C),but require a prepayment deposit,especially for products of special grades and dimensions.Please contact us for specific products.
Our standard delivery cycle is 5 weeks.The exact delivery time will be determined based on a comprehensive assessment of order volume and raw material inventory levels.Upon receiving your specific inquiry,we will provide an accurate timeline.
Common delivery term are available for us,like FOB,CFR,CIF,EX-works.We prefer to do CFR,CIF and EXW.
Yes,we can do DDP.For small quantity,our proposal is ship by courier/express.For huge shipment,we need time to check destination custom fees and local shipment cost.
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- RM901 No.22 Tangjiaqiao Road Wenzhou China
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
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