Caliper Perf Spec as Per Pof 2009

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LIN SCAN CALIPER PERFORMANCE SPECIFICATION (Data Analysis DOCUMENT)

LIN SCAN CALIPER PERFORMANCE SPECIFICATION

PREPARED BY:

Anton Suraev

REVIEWED BY:

Gavin Kay

APPROVED BY:

Cees C. Bal

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REVISION CONTROL PAGE

SL.No.

SECTION EDITED

REV. No. & DATE

DESCRIPTION

1 All Rev 1, 10.10.05 Initial revision

2 All Rev 2, 23.11.06

Rev. 1, Standard changed

3 Table 1, Table 5.

Rev 3, 05.07.2007

Rev. 2, Update

4 All Rev 6, 27 June, 2011

Updated according POF 3.2, Ver. 2009-

modification

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Table 1: Identification of features

FEATURE

Yes (POI > 90%)

NO (POI < 50%)

Maybe 50% <= POI <= 90%)

Internal ü External ü

Mid wall discrimination ü Additional metal / material - debris, magnetic ü

- debris, non- magnetic ü

- touching metal to metal ü

- other ü Anode ü Anomaly - arc strike ü

- artificial defect ü

- buckle ü

- corrosion ü

- corrosion cluster ü

- crack ü

- dent ü

- dent with metal loss ü

- gouging ü

- grinding ü

- girth weld crack ü

- girth weld anomaly ü

- HIC ü

- lamination ü

- longitudinal weld crack ü

- longitudinal weld anomaly ü

- ovality ü

- pipe mill anomaly ü

- pipe mill anomaly cluster ü

- SCC ü

- spalling ü

- spiral weld crack ü

- spiral weld anomaly ü

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FEATURE

Yes (POI > 90%)

NO (POI < 50%)

Maybe 50% <= POI <= 90%)

- wrinkle ü

Crack arrestor ü

Eccentric pipe casing ü

Change in wall thickness ü

CP connection ü

External Support ü

Ground anchor ü

Off take ü

Pipeline fixture ü

Reference Magnet ü Repair - weld sleeve repair ü

- composite sleeve repair ü

- weld deposit ü

- coating ü

Tee ü

Valve ü Weld - bend ü

- diameter change ü - wall thickness change

( pipe/pipe connection) ü

- adjacent tapering ü

- longitudinal weld ü - spiral weld ü - non identifiable seam ü - seamless ü

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Table 2: detection and sizing accuracy for anomalies in body of pipe

Parameter General

metal loss Pitting Axial

grooving Circumferential

grooving Pinhole Axial slotting Circumferential

Slotting

Depth of POD = 90% n.a n.a n.a n.a n.a n.a n.a

Depth Sizing accuracy at 80% certainty

n.a n.a n.a n.a n.a n.a n.a

Width Sizing accuracy at 80% certainty (mm)


Length Sizing accuracy at 80% certainty (mm)


Table 3: detection and sizing accuracy for anomalies in girth weld or heat affected zone

Parameter General

metal loss Pitting

Axial grooving

Circumferential grooving Pinhole* Axial slotting*

Circumferential Slotting*




Width Sizing accuracy at 80% certainty (mm)


Length Sizing accuracy at 80% certainty (mm)


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Table 4: Length of welds affected area and detection and sizing accuracy for metal loss anomalies in the area

Parameter

General metal loss

Pitting Axial

grooving Circumferential

grooving Pinhole* Axial

slotting* Circumferential

Slotting*

Length of welds affected area, upstream n.a n.a n.a n.a n.a n.a n.a

Length of welds affected area, down stream





Width Sizing accuracy at 80% certainty n.a n.a n.a n.a n.a n.a n.a

Length Sizing accuracy at 80% certainty


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Table 5: detection and sizing accuracy for anomalies for crack or crack like defects

Parameter Axial Crack Circumferential

Crack Spiral Crack

Depth at POD = 90% of crack with L = 25 mm n.a n.a n.a Minimum crack opening (mm) n.a n.a n.a Depth sizing accuracy at 80% certainty n.a n.a n.a Length sizing accuracy at 80% certainty n.a n.a n.a Orientation limits (in degrees) for delectability

n.a n.a n.a

Table 6: detection and sizing accuracy for dents and ovalities:

Parameter Dent Ovality*

Depth at POD = 90% 1% OD 2% OD

Depth sizing accuracy at 80% certainty ± 0.5% OD ± 1% OD

Width sizing accuracy at 80% certainty ± 40 mm N.A

Length sizing accuracy at 80% certainty ± 40 mm ± 40 mm

Ovality at POD = 90 % 2% OD N.A

* Ovality = (ID max – ID min) / (ID max + ID min)

Table 7: Detection and sizing accuracy in 90º bends:

Minimal bend radius for detection of dents and ovalities as given in Table 6 D*

Minimal bend radius for sizing accuracy for dents and ovalities as given in Table 6 D*

*If the bend radius in the pipeline is smaller than given in the table, then applicable specifications for that bend radius shall

additionally be provided in the Table 6.

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Table 8: Location accuracy of features

Accuracy of distance to upstream girth weld at 90% certainty 0.15m

Accuracy of distance from pig trap valve at 90% certainty 1.0 %

Accuracy of circumferential position at 90% certainty 10°

Table 9: Horizontal and vertical accuracy of pipeline location as function of marker

distance and certainty

Marker distance (m) Horizontal accuracy (m) at 80% certainty

Vertical accuracy (m) at 80% certainty

500 0.5 0.5

1000 1.0 1.0

2000 2.0 2.0

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Notes on Lin Scan Caliper Performance Specifications

Ø Specifications are valid for defect in straight pipe

Ø Specifications are valid for achieved tool velocity between 0.2 and 3 m/s

Ø Specifications are valid for tool acceleration up to 3 m/s2

Ø Specifications are valid for sufficiently clean pipelines (as per LIN SCAN

cleaning criteria) Ø Caliper sensors must be in contact with pipe wall and odometer wheels

should not be clogged Ø Specifications are valid for specific temperatures not exceeding maximum

temperature indicated on the tool data sheet Ø If the actual minimum detection depth of features is less than stated above,

these features will be reported as analyzed. In such cases, the sizing accuracies may not be achieved.

Ø Specifications are subject to change according to specific requirements.

Documents

Caliper Perf Spec as Per Pof 2009