Why is 09G2S steel the standard for flanges in the oil and gas industry in Russia and the CIS?

 Why is 09G2S steel the standard for flanges in the oil and gas industry in Russia and the CIS? 

2026-03-30

In the harsh climate of Russia, Kazakhstan and other CIS countries, the reliability of pipeline fittings comes to the fore. At temperatures below -40°C, ordinary carbon steel becomes brittle, which can lead to accidents. That's whysteel 09G2S(low alloy structural steel) has become an indispensable material for the production of flanges according to the standardGOST 33259-2015.

Technical characteristics and advantages:

  1. Cold resistance:Flanges made of 09G2S retain their impact strength at temperatures up to-70°С. This is critical for facilities in Siberia and the Arctic Circle.

  2. Weldability:This steel has excellent weldability without restrictions, which simplifies installationcollar flanges (type 11)on main pipelines.

  3. Durability:Thanks to the addition of manganese and silicon, the products have increased strength and wear resistance.

Production standards in Dingxiang:Our plant in Dingxiang County, a recognized forging center in China, strictly adheres to the chemical composition of steel. We carry out mandatory impact bending tests at subzero temperatures and ultrasonic testing (UZK). Our customers receive not just a part, but a safety guarantee for their energy projects.

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