DNV-RP-F101 Checker User Manual - OPIMsoftopimsoft.com/download/usermanual/DNV-RP-F101 Checker User...

DNV-RP-F101 CheckerTM

User Manual

DNV-RP-F101 Checker®

User Manual For Version: 1.0.0

Copyright © 2010-2017 OPIMsoft Technology Co., Ltd. All Rights Reserved.


User Manual

INDEX

1 FUNCTION ................................................................................................................. 1

2 INSTALLATION........................................................................................................... 2

3 HOW TO USE............................................................................................................. 3

3.1 Getting Started .................................................................................................. 3

3.2 The “Main” sheet ............................................................................................... 3

3.3 Additional defects .............................................................................................. 7

3.4 Interacting defects ............................................................................................. 9

3.5 Complex shape ............................................................................................... 11

3.6 Combined loading ........................................................................................... 13

4 TECHNICAL SUPPORT & AUTHORIZATION .......................................................... 15


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1 FUNCTION

DNV-RP-F101 Checker is developed for assessment of corroded pipelines in compliance

with DNV-RP-F101 “Corroded pipelines” Part A. The features of DNV-RP-F101 Checker are

listed below:

Assessment of single defect: Assessment of a single defect measured with either relative

or absolute depth measurements as e.g. for magnetic flux or ultrasonic intelligent pigs.

Additional defects: Multiple isolated defects can be evaluated simultaneously, where each

defect is interpreted as a single defect.

Single defect with combined loading: Assessment of an isolated longitudinal defect under

internal pressure loading and superimposed longitudinal compressive stresses.

Interacting defects: Assessment of a colony of interacting defects. An Interacting defect is

one that interacts with neighbouring defects in an axial or circumferential direction. The

failure pressure of an interacting defect is lower than the failure pressure of the individual

single defects.

Complex shaped defects: Assessment of complex shaped defects. A Complex Shaped

Defect is a defect that results from combining colonies of interacting defects, or a single

defect for which a profile is available.


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2 INSTALLATION

To start to use DNV-RP-F101 Checker, please:

For soft lock edition user:

1. Download software from official website to licensed PC.

2. Replace the original “license.dll” file with the one received.

3. Double click “DNV-RP-F101 Checker.exe” icon in the folder to start the software.

For dongle edition user:

1. Download software from official website.

2. Replace the original “license.dll” file with the one received.

3. Insert the attached dongle into one of USB ports of your PC.

4. Double click “DNV-RP-F101 Checker.exe” icon in the folder to start the software.

DNV-RP-F101 Checker runs on PC with Windows OS. User needs to install Microsoft Excel

before installing the software.


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3 HOW TO USE

3.1 Getting Started

DNV-RP-F101 Checker consists of the sheets labelled “Main”, “Additional defects”,

“Interacting defects”, “Complex shape” and “Combined loading”, corresponding to the

features described in Section 2.

All features make use of the base case data entered in the “Main” sheet. How to make use of

the different sheets/features is presented in the subsections below.

Note: As all features make use of data in the “Main” sheet, the current calculation results in

all sheets/features will be deleted when a parameter in the “Main” sheet is changed.

Functions of tool buttons:

“Load Case” button: Load the saved input files.

“Save Case” button: Save the parameters inputted into an input file.

“Run” button: Start the analysis for current sheet.

“Help” button: Call the help document.

3.2 The “Main” sheet

The “Main” sheet is used for assessment of a single defect as per section 3.7.3 of

DNV-RP-F101. The calculations are performed by clicking the Run button.

Figure 1 shows the input parameters entered in the “Main” sheet. A description of the input

parameters is also given in Table 3-1.


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Figure 1 The “Main” sheet – input parameters

Date: Sign: Date:

Prepared: Verified:

RELEVANT INPUT PARAMETERS:

Safety class, material and inspection capabilities

Safety Class: SC MEDIUM

Material req. "U": MR NO

Material Grade: MG X65

Specified minimum yield stress: SMYS 448.20 MPa

Specified minimum tensile strength: SMTS 530.90 MPa

Derating value of tensile strength: fu,temp 15.00 MPa

Inspection method: IM Relative MFL

Inspection confidence level: ICL 80.00 %

Inspection sizing accuracy: ISA 10.00 %

Geometry, load, density and reference height

Nominal outer steel diameter: OD 812.80 mm

Nominal steel wall thickness: tnom 19.10 mm

Internal pressure at reference height: pint 150.00 bar

Incidental to design pressure ratio: ginc 1.10 -

Reference height: href 30.00 m

Containment density: rcont 200.00 kg/m3

Water density: rw 1025.00 kg/m3

Specification of defect size

Height at defect: hd -100.00 m

Defect depth: d 4.78 mm

Defect length: l 200.00 mm

Subject: [Add subject]

Values

Project title: [Add project title]

Project no: [Add project no]

Client: [Add client]

DNV-RP-F101 - CORRODED PIPELINES

Single Defect, Part A

Version: DNV-RP-F101 2015 (Issued in January 2015)


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Table 3-1 Input parameters in the “Main” sheet


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The output from the single defect assessment is illustrated in Figure 2 and described in

Table 3-2.

Figure 2 The “Main” sheet – Results

INTERMEDIATE RESULTS:

Relative defect depth (d/t): d/t 0.250 -

Standard deviation of (d/t):StD[d/t] 0.078 -

Partial safety factor for longitudal corrosion model prediction: gm 0.850 -

Partial safety factor for corrosion depth: gd 1.274 -

Factor for defining a fractile value for the corrosion depth: ed 0.962 -

Material strength factor: au 0.960 -

Tensile strength to be used in design: fu 495.26 MPa

RESULTS:

Allowable diff. pressure at defect: pcorr 171.7 bar

Incidental diff. pressure at defect: pli - ple 157.5 bar

Allowable internal pressure at ref. height: pcorr,ref 162.9 bar

Utilisation at defect: U 0.917 -

Values

Values

0.0

0.2

0.4

0.6

0.8

1.0

0 200 400 600 800 1000 1200

Rela

tive d

efe

ct

dep

th (d

/t)

Defect length (mm)

Allowable measured defect size

Defect size

Allowable defect size


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Table 3-2 Results in the “Main” sheet

Figure 2 shows the results from the single defect assessment using the input in Figure 1.

The result from this assessment is an allowable internal pressure at reference height that

corresponds to an allowable differential pressure at the location of the defect. The limit state

has utilisation above 1.0 when the incidental differential pressure at the location of the defect

exceeds the allowable differential pressure at this location.

In the example shown in Figure 1 and Figure 2 the defect with depth of 4.78 mm and length

200 mm is acceptable with safety class “MEDIUM”.

3.3 Additional defects

The “Additional defects” sheet is an extension of the “Main” where multiple defects can be

assessed for the base case set of parameters in the “Main” sheet. The calculations are

performed by clicking the Run button.

The calculations performed in the “Additional defects” sheet make use of the base case

parameters in the “Main” sheet, but where the defect depth, defect length and height at

defect is changed to a list of defects.


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Figure 3 Additional defects – Input and results

The input and results are shown in Figure 3, Table 3-3 and Table 3-4. The allowable defect

size curve plotted in Figure 3 corresponds to the base case in the “Main” sheet. Defects that

are not acceptable (utilisation > 1.0) are marked in the plot. Note that acceptable and

unacceptable defects will correspond to the allowable defect size curve only when the height

at defect is the same as what is specified in the base case in the “Main” sheet.

Adittional defects to be included in plot: Results

Defect Height Allow diff. Allow press

ID Depth Length at defect depth/tnom press ref. height Utilisation Comment

1 4 100 -100 0.21 193.06 182.33 0.82

2 3 3 -100 0.16 202.60 191.01 0.78

3 5 150 -100 0.26 179.72 170.21 0.88

4 5 12 -100 0.26 202.39 190.82 0.78

5 5 100 -100 0.26 190.17 179.70 0.83

6 0.41 5 -100 0.02 202.60 191.01 0.78

7 0.1 20 -100 0.01 202.52 190.93 0.78

8 1 100 -100 0.05 199.25 187.96 0.79

9 2 50 -100 0.10 201.17 189.71 0.78

10 3 10 -100 0.16 202.53 190.94 0.78

11 1 16 -100 0.05 202.51 190.92 0.78

12 2 200 -100 0.10 188.37 178.07 0.84

13 9 400 -100 0.47 93.28 91.62 1.69 Util>1

14 1 250 -100 0.05 190.33 179.85 0.83

15 2 100 -100 0.10 197.50 186.37 0.80



Project no: [Add project no] DNV-RP-F101 CORRODED PIPELINES


Defect size [mm]

Single Defect, Part A

0.0

0.2

0.4

0.6

0.8

1.0

0 200 400 600 800 1000 1200

Rela

tive d

efe

ct

dep

th (d

/t)

Defect length (mm)

Allowable measured defect size

Allowable defect size - base case

Utilisation <1

Utilisation >=1


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Table 3-3 Input parameters in the “Additional defects” sheet

Table 3-4 Results in the “Additional defects” sheet

3.4 Interacting defects

The “Interacting defects” sheet is used for assessment of interacting defects as per section

3.8 of DNV-RP-F101. The calculations are performed by clicking the Run button.

To assess the pressure resistance of a pipeline with a set of interacting defects, the list of

defects is entered with start position, defect depth and length. For more details see section

3.8 of DNV-RP-F101. In this spreadsheet all defects in the defect list are projected onto a

projection line to obtain the wall thickness profile. Overlapping of defects are handled

automatically by the spreadsheet.

The input and results are shown in Figure 4, Table 3-5 and Table 3-6. These parameters are

used together with the base case parameters in the “Main” sheet (except for defect size) to

perform the calculation. The pressure resistance of a set of interacting defects is determined

from a subset of these defects that together produce the most critical combination. The

defects that are part of this subset are marked with a red background colour in the input list

and are also illustrated in the wall thickness profile plot, see Figure 4.


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Figure 4 Interacting defects – input and results

Table 3-5 Input parameters in the “Interacting defects” sheet

Interacting defects Results

184 bar

174 bar

7

Utilisation: 0.86

Defect Start Allow diff. Allow press

ID Depth Length pos. [mm] depth/tnom press ref. height Utilisation Comment

1 4 30 100 0.21 201.59 190.09 0.78 Critical

2 0.5 10 110 0.03 202.58 190.99 0.78

3 2 60 170 0.10 200.58 189.17 0.79 Critical

4 4 10 250 0.21 202.50 190.91 0.78 Critical

5 1.5 30 240 0.08 202.17 190.62 0.78 Critical

6 0.5 300 60 0.03 191.22 180.66 0.82 Critical

7 1 6 340 0.05 202.60 191.00 0.78 Critical

8 1.5 50 400 0.08 201.43 189.94 0.78 Critical



Client: [Add client] Interacting Defects, Part A

Number of defects interacting:

Defect size [mm]


Allowable diff. Pressure:

Allowable pressure at ref. height:

0.0

5.0

10.0

15.0

20.0

-15 85 185 285 385 485

Wall t

hic

kn

ess (m

m)

Position (mm)

Interacting defects - Wall thickness profileInteracting defects

Most critical

interaction


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Table 3-6 Results in the “Interacting defects” sheet

3.5 Complex shape

The “Complex shape” sheet is used for assessment of complex shaped defects as per

section 3.9 of DNV-RP-F101. The calculations are performed by clicking the Run button.

To assess the pressure resistance using the complex shape methodology, the wall thickness

profile is entered in the form of a list of position and defect depth. For more details see

section 3.9 of DNV-RP-F101.

The input and results are shown in Figure 5, Table 3-7 and Table 3-8. These parameters are

used together with the base case parameters in the “Main” sheet (except for defect size) to

perform the calculation.


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Figure 5 Complex shape – input and results

Table 3-7 Input parameters in the “Complex shape” sheet

Table 3-8 Results in the “Complex shape” sheet

Complex shaped defect Results

140 bar

134 bar

1.13

Point

ID Depth Position

1 0.00 0.00

2 0.00 0.00

3 2.31 0.80

4 2.72 1.60

5 3.00 2.40

6 3.22 3.20

7 3.38 4.00



Client: [Add client] Complex shaped defects, Part A

Utilisation:

Defect size [mm]


Allowable diff. Pressure:

Allowable pressure at ref. height:

0.0

5.0

10.0

15.0

20.0

25.0

-100 0 100 200 300 400 500 600 700

Wall t

hic

kn

ess [m

m]

Defect length (mm)

Complex shaped defect


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3.6 Combined loading

The “Combined loading” sheet is used for assessment of a single longitudinal or

circumferential defect with internal pressure and superimposed longitudinal compressive

stresses as per section 3.7.4 & 3.7.5 of DNV-RP-F101. The calculations are performed by

clicking the Run button.

To assess the pressure resistance of a single defect using the combined loading

methodology, the compressive longitudinal stress and circumferential length of the corroded

region is entered. The input and results are shown in Figure 6, Table 3-9 and Table 3-10.

These parameters are used together with the base case parameters in the “Main” sheet to

perform the calculation. For more details see section 3.7.4 & 3.7.5 of DNV-RP-F101.

Figure 6 Combined loading – input and results

Compressive longitudinal stress: sL -190.00 MPa

Circumferential length of corroded region: c 50.00 mm

Ratio of circumferential corroded length (c) to the nominal outside pipe circumference: q 0.02 -

Usage factor for longitudinal stress: x 0.85 -

Allowable diff. pressure at defect: pcorr,comp 163.38 bar

Incidental diff. pressure at defect: pli - ple 157.50 bar

Allowable internal pressure at ref. height: pcorr,ref 155.35 bar

Utilisation at defect: U 0.964 -


RESULTS:

DNV-RP-F101 CORRODED PIPELINES

Combined loading, Part A


RELEVANT INPUT PARAMETERS: Values

INTERMEDIATE RESULTS:

Project no: [Add project no]


0

2

4

6

8

10

12

14

16

18

20

-500 -400 -300 -200 -100 0 100 200 300

Pre

ssu

re [

bar]

Longitudinal stress from external forces [MPa]

Combined loading - allowable inc. diff. pressure at defect


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Table 3-9 Input parameters in the “Combined loading” sheet

Table 3-10 Results in the “Combined loading” sheet


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4 TECHNICAL SUPPORT & AUTHORIZATION

For technical support and authorization of DNV-RP-F101 CheckerTM, please visit:

http://www.opimsoft.com

or contact:

[email protected]

http://www.opimsoft.com/

mailto:[email protected]

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