1. Norsk Induksjonsrørbøying AS

3. Factors: Heating Speed Bending Temperature Cooling Speed Mother Pipe Material Properties

4. Bending Machine: Air-ring Inductor Quench ring

5. PB450-18” Induction Bending Machine

6. PB400-16” Induction Bending Machine

7. Profiles: All materials that can conduct electricity are bendable, almost regardless of the profile shape! Pipe dimensions from 16 mm to 457,2 mm (18”)

8. Ω – Spool reduced with 8 welds and better flow

9. Examples Of cost reducing designs Ex. 1. Traditional method, with welded standard pipes. 6 welded joints Ex. 2. Induction bends, with long straight ends. 1 welded joint Ex. 3. Induction spool. 0 welding Ex. 4. Induction bends, with long straight ends. 2 welded joints

10. Heating Speed:

11. Bending Temperature/temperature tolerance Material Grade Carbon material (870º – 930º) Duplex / Super Duplex (1050º – 1120º) Mother pipe material certificates Wall thickness Induction coil

12. Cooling Speed:

13. Motherpipe Material Properties Carbon steel / Stainless steel Seamless / longitudinal welded Weld cap (G48) Segregation / Intermetallic phases in the middle of the plate thickness

14. Post Bend Heat Treatment (PBHT) Heating of steel Capacity: 3,5 tons Temperature 580°C to 1150°C

15. Carbon steel - Tempering (SML 360 / 415) - Quenching and Tempering (SML 415 / 450) - Normalizing (SML 360)

16. Duplex / Superduplex - Wall thickness - Pipe manufacturer - Seamless / Seamwelded - Bending radius

17. PBHT – Increasing Cost - PBHT - PBHT Batch test - Blasting / Pickling - Single bends = more welds

18. NORSOK M-630, DNV OS-F101, ISO 15590-1, TR 2000 TR 1969 TR 1120 And a lot of other specifications Specifications: How do we ensure the quality of the bends?

19. Mechanical Testing 1.Qualification Test 2.Production Test 3.Batch Test

25. Norsk Induksjonsrørbøying AS - NIRASBø Industriområde 2 3802 Bø i Telemark niras@online.no Tlf: (+47) 35 06 13 10 Faks: (+47) 35 06 13 11 niras@online.no Tlf: (+47) 35 06 13 10 Faks: (+47) 35 06 13 11 Contact Info: