Bends

Pipe elbows

• GOST 22793-89 Pipe elbows for Рnominal from over 10 and up to 100 MPa (over 100 and up to 1000 kgf/cm2);
• OST 24.125.03-89 Pipe elbows with diameters less than 100 mm for pipelines at Nuclear Power Plants;
• OST 24.125.04-89 Pipe elbows for pipelines at Nuclear Power Plants;
• OST 24.125.32-89 Pipe elbows with diameters less than 100 mm for pipelines at Nuclear Power Plants;
• OST 34-42-661-84 Parts and assembly units of Nuclear Power Plant pipelines with Poper. < 2.2 MPa (22 kgf/cm2), t < 350 °С. Pipe elbows;
• OST 34-42-420-78 Parts and components of Nuclear Power Plant pipelines Рnominal ≤ 4 MPa (40 kgf/cm2). Pipe elbows;
• OST 36-42-81 Carbon steel pipeline parts, welded and bent, Dnominal up to 500 mm, Pnominal up to 10 MPa (100 kgf/cm2). Pipe elbows;
• STO SRO-P 60542948 00011-2013 (supersedes OST 34-42-661-84) Pearlitic steel parts and assembly units for B and C group pipelines at nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm2);
• STO 79814898 113–2009 (supersedes OST 34-10-420-90) Corrosion resistant steel parts and assembly units for nuclear power plant pipelines operating at a pressure of up to 2.2 MPa (22 kgf/cm2). Pipe elbows;
• STO 95 115-2013 (supersedes OST 34-42-661-84) Pearlitic steel parts and assembly units for industrial steam and hot water pipelines at nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm²);
• STO TsKTI 321.01-2009 Parts and assembly units for thermal power plant pipelines operating at an absolute pressure р ≥ 4.0 MPa, made from carbon and manganese-silicon steel and having designed useful life of 200,000 hours;
• STO TsKTI 321.02-2009 Pipe elbows for steam and hot water pipelines of thermal power plants;
• TU 51-515-91 Pipe elbows;
• TU 102-488-95 Connecting pieces and units of transit pipelines with Poper. of up to 10 MPa (100 kgf/cm2). Pipe elbows..

Short radius pipe elbows

• STO 95 130-2013 (supersedes OST 34-42-699-84, except for parts intended for group B and C pipelines of nuclear power plants) Pearlitic steel parts and assembly units for industrial steam and hot water pipelines at nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm2); Short radius pipe elbows;
• STO TsKTI 321.03-2009 Parts and assembly units for thermal power plant pipelines operating at an absolute pressure р≥4.0 MPa, made from carbon and manganese-silicon steel and having designed useful life of 200,000 hours;
• TU 102-488-95 Connecting pieces and units of transit pipelines with Poper. of up to 10 MPa (100 kgf/cm2). Short radius and forged welded pipe elbows;
• OST 34.10.699-97 Seamless welded steel parts for nuclear and thermal power plant pipelines, Рoper. < 2.2 MPa (22 kgf/cm2). Short radius pipe elbows.

Pressed pipe elbows

• • STO TsKTI 321.04-2009 Parts and assembly units for thermal power plant pipelines operating at an absolute pressure р≥4.0 MPa, made from carbon and manganese-silicon steel and having designed useful life of 200,000 hours. Pressed pipe elbows for steam and hot water pipelines of thermal power plants.

Welded segmented pipe elbows

• OST 34-10-752-97 Parts and assembly units of thermal power plant pipelines with Poper. < 2.2 MPa (22 kgf/cm2), t ≤ 425 °С. Welded segmented pipe elbows;
• OST 34-42-663-84 Parts and assembly units of Nuclear Power Plant pipelines with Poper. < 2.2 MPa (22 kgf/cm2), t < 350 °С. Welded pipe elbows;
• OST 34-42-419-78 Parts and components of Nuclear Power Plant pipelines Рnominal ≤ 4 MPa (40 kgf/cm2). Welded pipe elbows;
• OST 36-21-77 Welded carbon steel pipeline parts Dnominal 500 - 1400 mm, Рnominal ≤ 2.5 MPa (≈ 25 kgf/cm2). Segmented pipe elbows. R = 1.5Dnominal with an angle of 30, 45, 60 or 90°;
• TS 583.00 series 5.903-13 issue 1 Welded pipe elbows used for laying heating pipeline systems.

Short radius pipes

• STO SRO-P 60542948 00012-2013 (supersedes OST 34-42-662-84) Pearlitic steel parts and assembly units for B and C group pipelines at nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm2); Short radius pipes;
• STO 79814898 114–2009 (supersedes OST 34-10-421-90) Corrosion resistant steel parts and assembly units for nuclear power plant pipelines operating at a pressure of up to 2.2 MPa (22 kgf/cm2). Short radius pipes;
• STO 95 116-2013 (supersedes OST 34-42-661-84) Pearlitic steel parts and assembly units for industrial steam and hot water pipelines at nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm2); Short radius pipes.

Short radius pipe elbows

• STO SRO-P 60542948 00027-2013 (supersedes OST 34-10-699-97 in respect of group B and C pipelines of nuclear power plants) Pearlitic steel parts and components of group B and C pipelines of nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm2). Short radius pipe elbows;
• STO 79814898 111–2009 (supersedes OST 34-10-418-90) Corrosion resistant steel parts and assembly units for nuclear power plant pipelines operating at a pressure of up to 2.2 MPa (22 kgf/cm2). Short radius pipe elbows.

Welded segmented pipe elbows

• STO SRO-P 60542948 00013-2013 (supersedes OST 34-42-663-84) Pearlitic steel parts and assembly units for B and C group pipelines at nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm2). Welded pipe elbows;
• STO 95 117-2013 (supersedes OST 34-42-663-84) Pearlitic steel parts and assembly units for industrial steam and hot water pipelines at nuclear power plants, operating at a pressure of up to 2.2 MPa (22 kgf/cm2). Welded segmented pipe elbows.

Segmented pipe elbows

• • STO 79814898 112–2009 (supersedes OST 34-10-419-90) Corrosion resistant steel parts and assembly units for nuclear power plant pipelines operating at a pressure of up to 2.2 MPa (22 kgf/cm2). Segmented pipe elbows.

Pipe elbows for oil and gas industry and petrochemical industry:

Bend:

• TU 1469-013-04834179-2014, TU 1469-012-04834179-2008, part 2 for transit gas pipelines of PJSC "Gazprom";
• TU 102-488.1-05, TU 1469-030-04834179-2010 for transit oil pipelines;
• TU 1469-010-04834179-2011 for transit and process oil pipelines and oil product pipelines of PJSC "Transneft";
• TU 1469-032-04834179-2012 for construction of oil field surface facilities;
• GazTU 102-488/2-05, TU 1469-015-04834179-2011, TU 1468-027-04834179-2015 for application in process pipelines of chemical, petrochemical, oil refining and other industrial facilities;
• TU 1469-011-04834179-2010 for transit oil pipelines of PJSC "Transneft";
• TU 1469-014-04834179-2008 for transit and field gas pipelines of PJSC "Gazprom";
• ASME B16.49-2012, for transit and field pipelines.

Stamped short radius:

• TU 1469-010-04834179-2011 for transit and process oil pipelines and oil product pipelines of PJSC "Transneft".

Short radius seamless welded and forged welded elbows:

• TU 1468-027-04834179-2015 for process pipelines of chemical, petrochemical, oil refining and other industrial facilities.

Short radius pressed and forged welded:

• TU 1469-032-04834179-2012 (steel 13KhFA, 09GSF, 20FA, 08KhFChA, steel 20, 09G2S, etc.) for construction of oil and gas field surface facilities;
• TU 1469-019-04834179-2014 for transit and field pipelines of PJSC "Gazprom", intended for transportation of gaseous (natural gas) or liquid (crude oil and oil products) hydrocarbons which have no corrosion effects on the pipe metal.

Short radius, bend and forged welded:

• TU 14-1-5598-2011 for construction of oil field surface facilities.

Forged welded:

• TU 102-488-05, GazTU 102-488/1-05, TU 1469-030-04834179-2010, TU 1469-022-04834179-2011 for transit oil and gas pipelines.

Pressed and forged welded:

• TU 1469-012-04834179-2008 for transit and field high pressure gas pipelines (PJSC "Gazprom").

Welded segmented:

• TU 26-08-693-81 for petrochemical industry enterprises.