DNV-RP-F101 Checker. User Manual

Transcription

1 DNV-RP-F101 Checker User Manual For Version: Copyright OPIMsoft Technology Co., Ltd. All Rights Reserved.

2 INDEX 1 FUNCTION INSTALLATION HOW TO USE Getting Started The Main sheet Additional defects Interacting defects Complex shape Combined loading TECHNICAL SUPPORT & AUTHORIZATION... 15

3 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. 1

4 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. 2

5 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 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

6 Project title: Project no: Client: Subject: Prepared: [Add project title] [Add project no] [Add client] [Add subject] Date: Sign: Date: RELEVANT INPUT PARAMETERS: Verified: Safety class, material and inspection capabilities Safety Class: SC MEDIUM Material req. "U": MR NO Material Grade: MG X65 Specified minimum yield stress: SMYS MPa Specified minimum tensile strength: SMTS MPa Derating value of tensile strength: f u,temp MPa Inspection method: IM Relative MFL Inspection confidence level: ICL % Inspection sizing accuracy: ISA % Geometry, load, density and reference height Nominal outer steel diameter: OD mm Nominal steel wall thickness: t nom mm Internal pressure at reference height: p int bar Incidental to design pressure ratio: g inc Reference height: h ref m Containment density: r cont kg/m 3 Water density: r w kg/m 3 Specification of defect size DNV-RP-F101 - CORRODED PIPELINES Single Defect, Part A Version: DNV-RP-F (Issued in January 2015) Values Height at defect: h d m Defect depth: d 4.78 mm Defect length: l mm Figure 1 The Main sheet input parameters 4

7 Table 3-1 Input parameters in the Main sheet 5

8 Relative defect depth (d/t) DNV-RP-F101 Checker TM User Manual The output from the single defect assessment is illustrated in Figure 2 and described in Table 3-2. INTERMEDIATE RESULTS: Values Relative defect depth (d/t): d/t Standard deviation of (d/t): StD[d/t] Partial safety factor for longitudal corrosion model prediction: g m Partial safety factor for corrosion depth: g d Factor for defining a fractile value for the corrosion depth: e d Material strength factor: a u Tensile strength to be used in design: f u MPa RESULTS: Allowable diff. pressure at defect: p corr Values bar Incidental diff. pressure at defect: p li - p le bar Allowable internal pressure at ref. height: p corr,ref bar Utilisation at defect: U Allowable measured defect size Defect size Allowable defect size Defect length (mm) Figure 2 The Main sheet Results 6

9 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. 7

10 Relative defect depth (d/t) DNV-RP-F101 Checker TM User Manual Project title: [Add project title] Project no: [Add project no] DNV-RP-F101 CORRODED PIPELINES Client: [Add client] Single Defect, Part A Subject: [Add subject] Allowable measured defect size Allowable defect size - base case Utilisation <1 Utilisation >= Defect length (mm) Adittional defects to be included in plot: Results Defect Defect size [mm] Height Allow diff. Allow press ID Depth Length at defect depth/tnom press ref. height Utilisation Comment Util> 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. 8

11 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. 9

12 Wall thickness (mm) DNV-RP-F101 Checker TM User Manual Project title: [Add project title] Project no: [Add project no] DNV-RP-F101 CORRODED PIPELINES Client: [Add client] Interacting Defects, Part A Subject: [Add subject] 20.0 Interacting defects - Wall thickness profile Interacting defects Most critical interaction Position (mm) Interacting defects Results Allowable diff. Pressure: 184 bar Allowable pressure at ref. height: 174 bar Number of defects interacting: 7 Utilisation: 0.86 Defect Defect size [mm] Start Allow diff. Allow press ID Depth Length pos. [mm] depth/tnom press ref. height Utilisation Comment Critical Critical Critical Critical Critical Critical Critical Figure 4 Interacting defects input and results Table 3-5 Input parameters in the Interacting defects sheet 10

13 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. 11

14 Wall thickness [mm] DNV-RP-F101 Checker TM User Manual Project title: [Add project title] Project no: [Add project no] DNV-RP-F101 CORRODED PIPELINES Client: [Add client] Complex shaped defects, Part A Subject: [Add subject] 25.0 Complex shaped defect Complex shaped defect Point Defect size [mm] ID Depth Position Defect length (mm) Results Allowable diff. Pressure: Allowable pressure at ref. height: Utilisation: Figure 5 Complex shape input and results Table 3-7 Input parameters in the Complex shape sheet 140 bar 134 bar 1.13 Table 3-8 Results in the Complex shape sheet 12

15 Pressure [bar] DNV-RP-F101 Checker TM User Manual 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 & 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 These parameters are used together with the base case parameters in the Main sheet to perform the calculation. For more details see section & of DNV-RP-F101. Project title: [Add project title] Project no: [Add project no] Client: [Add client] Subject: [Add subject] RELEVANT INPUT PARAMETERS: DNV-RP-F101 CORRODED PIPELINES Combined loading, Part A Values INTERMEDIATE RESULTS: Compressive longitudinal stress: s L MPa Circumferential length of corroded region: c mm Ratio of circumferential corroded length (c) to the nominal outside pipe circumference: q Usage factor for longitudinal stress: x RESULTS: Allowable diff. pressure at defect: p corr,comp bar Incidental diff. pressure at defect: p li - p le bar Allowable internal pressure at ref. height: p corr,ref bar Utilisation at defect: U Combined loading - allowable inc. diff. pressure at defect Longitudinal stress from external forces [MPa] Figure 6 Combined loading input and results 13

16 Table 3-9 Input parameters in the Combined loading sheet Table 3-10 Results in the Combined loading sheet 14

17 4 TECHNICAL SUPPORT & AUTHORIZATION For technical support and authorization of DNV-RP-F101 Checker TM, please visit: or contact: 15