* Тechnical specification included in the Registry of Main Product Types Purchased by Transneft
** Тechnical specification included in the Registry of Gazprom Piping Products
The bends are designed to connect piping of same diameterpositioned angularly towards each other and ensure the line is redirected smoothly.
Reference example of 90° knuckle bend for pipe outside diameter (OD) 720 mm, wall thickness (WT) 16 mm, strength class K60, operating pressure 7.5 MPa at service factor m=0.6; climate design UKhL:
ОКШС 90°720(16К60)-7,5-0,6-УХЛ
ТУ 1469-006-00153229-2009
ENG: OHShS 90°720(16K60)-7,5-0,6-UKhL
Spec. TU 1469-006-00153229-2009
| Norms and Regulations | Nominal diameter, DN | Operating pressure, Pop, MPa | Bend angle, deg | Rotation radius, DN |
| Spec. TU 1469-006-00153229-2001 | 500… 1200 | up to 11.8 | 30, 45, 60, 90 | 1.0; 1.5 |
| Spec. TU 1469-006-00153229-2009 | 300… 1400 | up to 16.0 | 30, 45, 60, 90 | 1.0; 1.5 |
| Spec. TU 1469-035-00153229-2015 | 300… 500 | up to 16.0 | 30, 45, 60, 90 | 1.0 |
| 600… 1000 | up to 9.8 | 30, 45, 60, 90 | 1.0 | |
| 300… 500 | up to 32.0 | 30, 45, 60, 90 | 1.5 | |
| 600… 1000 | up to 16.0 | 30, 45, 60, 90 | 1.5 | |
| 1200… 1400 | up to 11.8 | 30, 45, 60, 90 | 1.5 | |
| Spec. TU 1469-040-00153229-2017 | 300… 1200 | up to 32.0 | 30, 45, 60, 90 | 1.5 |
The bends are available in performance different from specified in the table (pressure, service factor or climate design) or for connection with piping of different thickness. Bends are available with adaptor rings (length at least 250 mm) acc. to SNIP III.42.80 upon request and may come with external insulation coating according to Specifications TU 1469-011-00153229-2012 and TU 1469-006-00153229-2001.
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