Norsk Induksjonsrørbøying AS. Factors: Heating Speed Bending Temperature Cooling Speed Mother Pipe Material Properties.

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Presentation transcript:

Norsk Induksjonsrørbøying AS

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

Bending Machine: Air-ring Inductor Quench ring

PB450-18” Induction Bending Machine

PB400-16” Induction Bending Machine

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”)

Ω – Spool reduced with 8 welds and better flow

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

Heating Speed:

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

Cooling Speed:

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

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

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

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

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

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

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

Norsk Induksjonsrørbøying AS - NIRASBø Industriområde Bø i Telemark Tlf: (+47) Faks: (+47) Tlf: (+47) Faks: (+47) Contact Info: