20" MagneScan Tool Data Sheet
500 mm
No. of Vehicles - 3
Inspection Specification Tool Length - 4.09 m
Feature type - Manual specification in pipe body Tool Weight - 841 kg
Pitting Corrosion @ 2t x 2t
SeamWelded Seamless
a) Minimum depth (POD 90%) 0.08t 0.13t
b) Depth accuracy (80% Conf.) ± 0.1t ± 0.1t
c) Minimum Surface dimension (7mm x 7mm) or (0.4t x 0.4t)
d) Length accuracy ± 10mm ± 20mm
e) Width accuracy ± 20mm ± 20mm
General Corrosion @ 4t x4t
SeamWelded Seamless
a) Minimum depth (POD 90%) 0.05t 0.09t
b) Depth accuracy (80% Conf.) ± 0.1t ± 0.1t
c) Length accuracy ± 20mm ± 20mm
d) Width accuracy ± 20mm ± 20mm
Gouging SeamWelded Seamless
Circ.
Width > 1t or 7mm Axial Circ. Axial
0.09t
a) Minimum depth (POD 90%) 0.08t 0.05t 0.13t -0.1t / +0.15t
b) Depth accuracy (80% Conf.) +0.1t / -0.15t -0.1t / +0.15t +0.1t / -0.15t ± 20mm
c) Length accuracy ± 20mm ± 20mm ± 20mm ± 20mm
d) Width accuracy ± 20mm ± 20mm ± 20mm
Wall thickness for full specification up to 20.8mm max 6mm min
Wall thickness for bore passing up to 16.4mm straight 16.4mm bends
Location of features
Axial position accuracy ± 1%
or distance from Ref. Girth weld 0.1m
Circumferential position accuracy ± 5°
Operating Specification
Pipeline Product
Maximum pressure 150 bar
Temperature range 0 to 40 ° C
Velocity range 0.3 to 5.0 m/s (1.0 m/s min for lower pressure gas lines)
Pipeline Geometry
Minimum continuous bore 475 mm
Maximum continuous bore 496 mm
Min local bore restrictions 451 mm (Restriction length < 2d)
Gauge plate diameter 451 mm
Max step height in pipe bore
a) Full circumferential step 10 mm
b) Partial circumferential step
(not exceeding 60 degree angle) 21 mm
Bend min. centre line radius 3D (Back to back bend combinations without
straight transitions can be negotiated)
Pipeline Fittings
Tees
Maximum Diameter Barred 508 mm
Maximum Diameter Unbarred 305 mm
Min- full bore adjacent tees
centreline separation 1425 mm
Valves
Ball valves Min. bore 451 mm
Gate valves Min. bore 451 mm
- axial void length 140 mm
Non return valve Min. bore 451 mm (Clappers on all top hinged valves
- maximum void length 790 mm should be locked open or removed)
Pipelines outside the scope of this data sheeet can be assessed individually.
Technical Data - GT/32000/0001 Issue - 8 19-DEC-2000
20" MagneScan Trap Data Sheet
500 mm
Trap Data
Launch Trap
180 degree
3.86m .62m
door opening
0.5m
pig trap valve
1.37m
d
20in
1.37m
D 24in
d k 5.00in
5.5m
kicker balance
D = d + 4", d k = d / 4 line pipe
Receive Trap
3.27m 2.71m * 180 degree
door opening
pig trap valve
1.37m
d
20in
1.37m
D 24in
balance kicker 5.5m
D = d + 4" pipe line
* may be reduced by 1m for single phase liquids
Tool Lengths
Tool Length : 4.09 m Rear of Tool to Rear Cup, A : 2.87 m
Cup Rubber Centres, C : 0.79 m Front of Tool to Rear Cup, B : 1.21 m
All dimensions are for new traps only. Many shorter, existing traps can be accommodated by
modifying tool build or launch procedures. Contact Sales to discuss.
Trap Data - GT/32000/0001 Issue - 8 19-DEC-00
