PSI - Issue 40

N.A. Makhutov et al. / Procedia Structural Integrity 40 (2022) 283–295

288

6

N.A. Makhutov at al. / Structural Integrity Procedia 00 (2022) 000 – 000

Table 1. Results of diagnostics along length L (km) of "Ust-Balyk-Kurgan-Ufa-Almetyevsk" oil pipeline (03.2020)

Average volume of remove metal in pipe section, %

Maximum depth of defective zone, l max ( τ S )

Minimum pipeline radius of curvature, ρ(τ s )

Density of identified defects, 1/km

Yield strength of steel, σ γ ( τ S )

Maximum pressure in section, p ( τ S )

Minimum wall thickness, δ min ( τ S )

Tensile strength of steel, σ u ( τ S )

Distance along length of pipeline, L

Diameter, d ( τ S )

Bld. No.117 - 749.725 m Bld. No.117 - 542.325 m Bld. No.117 - 334.525 m Bld. No.117 - 125.025 m Bld. No.117 + 78.175 m Bld. No.117 + 286.875 m Bld. No.117 + 496.375 m Bld. No.117 + 575.775 m Bld. No.117 + 806.975 m Bld. No.117 + 1016.175 m Bld. No.117 + 1222.675 m Bld. No.117 + 1429.575 m

32.4

11.3

1220

1.0

2.36

0.018

411

593

558

32.3

11.1

1220

1.2

4.18

0.254

411

593

460

32.5

11.0

1220

1.1

2.26

0.005

411

593

350

33.0

10.8

1220

2.2

4.57

0.527

411

593

340

34.8

11.1

1220

2.5

5.90

0.365

411

593

340

38.0

11.1

1220

1.7

10.14

1.046

411

593

442

38.8

11.1

1220

0.8

2.88

0.006

411

593

657

39.8

11.0

1220

2.0

4.11

0.361

411

593

645

40.1

11.1

1220

1.2

2.44

0.022

411

593

952

40.2

11.1

1220

1.2

2.40

0.158

411

593

1041

40.7

10.8

1220

1.0

2.92

0.194

411

593

709

40.7

11.2

1220

1.3

3.03

0.781

411

593

892

Table 2. Changes in design parameters during repeated diagnostics of a critical section (oil pipeline "Surgut - Polotsk", valve gate No.88 + 10783.202 m)

Average volume of remove metal in pipe section, %

Maximum depth of defective zone, l max ( τ S )

Minimum pipeline radius of curvature, ρ(τ s )

Yield strength of steel, σ γ ( τ S )

Maximum pressure in section, p ( τ S )

Minimum wall thickness, δ min ( τ S )

Density of identified defects, 1/km

Tensile strength of steel, σ u ( τ S )

Period of operation,

Diameter, d ( τ S )

2020

41.9

11.8

1220

4.2

6.07

0.991

424

602

359

2017

41.9

11.8

1220

4.2

5.28

0.554

424

602

374

2014

41.9

11.3

1220

4.2

4.31

0.289

410

578

–

2011

41.9

11.3

1220

4.2

2.59

0.100

410

578

–

2007

41.9

11.3

1220

2.7

2.35

0.013

410

578

–