induction welding

1. High Frequency Induction
(HFI) Welded Pipe
Tata Steel operates three mills specialising in HFI pipe.
Accurate control of the coil rolling process ensures
tight wall thickness tolerances. Bespoke forming rolls
are used to produce pipe with outside diameters
ranging from 2 inches to 20 inches.
Our HFI pipe is produced from high quality Our HFI process delivers outstanding linepipe Our HFI process also offers a range
coiled strip steel feedstock. The process has properties and performance: of programme advantages:
been perfected over 40 years and ensures that • eld lines meet the impact requirements
W • ontinuous production ensures short
C
we are able to offer high integrity linepipe and of severe offshore conditions lead times are met
injection pipe to meet the most demanding • all thickness tolerance of +/- 5% to the
W • Yield to tensile ratios accommodate reel lay
project schedules. The advanced, integrated nearest 0.1 mm • xcellent dimensional control enables
E
process delivers enhanced weld properties • Toughness to 40 Joules minimum at -20°C good lay rates and optimum design
through in-line weld annealing (for 8 inch - • our service to NACE pH3 available in
S
20 inch pipe). Full body heat treatment is diameters 8 and above
also supplied where specification demands. • Strength grades up to API 5L X70 or equivalent
Our smallest diameter pipe (2 inch – 4.5 inch)
Wall thickness versus outside diameter capabilities of HFI welded pipe
is hot rolled and stretch reduced, meeting the
(mm)
(inches)
requirements of ISO 3183. The pipe is produced
in grades up to L360NC as standard. Our HFI
welded pipe production processes incorporate 16 5
/8
an extensive range of tests including full body 15
non-destructive testing and hydro-testing.
14
Our pipe can also be supplied with a range
of anti-corrosion and insulation coatings. 13 1
/2
12
11
10
3
/8
9
8
7
1
/4
6
Pipe wall thickness
5
4
3
1
/8
2 4 6 8 10 12 14 16 18 20
Outside diameter (inches)

2. HFI welded pipe mill process route
Uncoiler End shear Coil accumulator
Edge miller
Coil Joiner
O.D I.D weld trim Squeeze rolls High frequency Forming mill
induction welding
Non-destructive
testing
Weldline annealing Pipe sizing Rotary cut-off Unique pipe
Non-destructive machine identification
testing
01-02-03
Tempered pipe Heat treatment furnace
01-02-03
Air cooling Mechanical test
in accordance
with customer
requirements
Hydrostatic testing
Weld seam and full body
ultrasonic testing Loading
Customer
End facing
acceptance
01-02-03 and bevelling
Despatch
Final inspection
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Tata Steel While care has been taken to ensure that the information contained in this publication
PO Box 101, Weldon Road, Corby, Northants is accurate, neither Tata Steel Europe Limited, nor its subsidiaries, accept responsibility
NN17 5UA, United Kingdom or liability for errors or for information which is found to be misleading.
T: +44 (0) 1536 404261 F: +44 (0) 1536 404095 Copyright 2011
energyprojects@tatasteel.com www.tatasteelenergy.com Tata Steel Europe Limited
English Language TST21:1000:UK:04/2011