Bent turbular elements

Technology

  • Step 1 – Incoming inspection
  • Step 2 – Pipe setting
  • Step 3 - Bending
  • Step 4 – Geometry measurement
  • Step 5 – Precise cutting
  • Step 6 – End machining
  • Step 7 – Ultrasonic examination
  • Step 8 – Magnetic-particle testing
  • Step 9 – Surface preparation
  • Step 10 – Corrosion-proof coating
  • Step 11 – Marking
  • Step 12 - Certification
  • Step 13 – Finished product



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Incoming inspection

Application of specifications

Customer (primary) Normative documents Specific diameter (mm) Operating pressure (MPa)
Gazprom Public Company

TU specs 146930-001-05680235-05*

TU specs 1469-006-56802935-2010*

TU specs 1469-012-56802935-2011*

TU specs 1469-013-56802935-2013*

TU specs 1469-016-56802935-2013*

400 to 1400

200 to 1400

150 to 1400

500 to 1200

to 1400

up to 9.8 MPa

up to 12 MPa

up to 32 MPa

up to 11.8 MPa

up to 32 Mpa

Transneft JSC

TU specs 1469-003-5680235-05**

TU specs 1469-004-56802935-2005**

TU specs 1469-008-56802935-2011**

TU specs 1469-011-56802935-2011**

TU specs 1469-017-56802935-2015**

1050 to 1200

400 to 1220

500 to 1200

500 to 1200

150 to 1400

up to 14 MPa

up to 8.5 MPa

up to 11.8 MPa

up to 9.8 MPa

up to 11.8 Mpa

Rosneft JSC TU specs 1469-015-56802935-2015*** 150 to 1400 up to 32 Mpa

* - according to Gazprom and DNV specifications and standards

** - according to Transneft specifications and standards

*** - according to Rosneft specifications and standards

 

Nomenclature of induction heating bent tubular elements by diameter and turning radius.