Analysis of a failed pipe elbow in geothermal production facility

Kusmono, Kusmono; Khasani,

doi:10.1016/j.csefa.2017.08.001

Cited by 18 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The specimens were then polished and etched to observe the metallographic structures by metallographic microscope (MM). As shown in Figure (a), the metallographic structure of steam control valve composes of ferrites and pearlites, which is the characteristic microstructure of low carbon steel . Figure (b) and (c) shows that the inclusion classification of steam control valve is A1, B0.5, C0, D1, D2e, DS2.5 according to GB/T 10561‐2005 (equivalent to ISO 4967‐2013).…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…As shown in Figure 3(a), the metallographic structure of steam control valve composes of ferrites and pearlites, which is the characteristic microstructure of low carbon steel. [9] Figure 3(b) and (c) shows that the inclusion classification of steam control valve is A1, B0.5, C0, D1, D2e, DS2.5 according to GB/T 10561-2005 [10] (equivalent to ISO 4967-2013 [11] ). Among them, A refers to sulfide inclusion, B refers to alumina inclusion, D refers to spherical oxide inclusion and DS refers to single particle spherical inclusion.…”

Section: Metallographic Structuresmentioning

confidence: 99%

See 1 more Smart Citation

Failure analysis on synergistic effect of erosion and corrosion on failed fittings in specialty chemical plant. Part II: Control valve

Yang

Wang

Fei

et al. 2018

Materials & Corrosion

View full text Add to dashboard Cite

Failure analysis was carried out on a control valve in the steam system of a specialty chemical plant. Comprehensive analyses were conducted to investigate the operating conditions, base materials, macroscopic, and microscopic morphologies of the failed steam control valve and a computational fluid dynamic model was also adopted. The results showed that the synergistic effect of electrochemical corrosion favored by chlorides and two phase flow erosion accounted for the premature failure of the steam control valve. Considering the fact that the valve was designed by a German company, assembled by an American company and used in a Chinese company, our failure analysis seems to be crucial for the imputation of the responsibility. The failure mechanisms were discussed and the relevant countermeasures were proposed to prevent the occurrence of similar failure again.

show abstract

Section: Experiments and Resultsmentioning

confidence: 99%

Section: Metallographic Structuresmentioning

confidence: 99%

Failure analysis on synergistic effect of erosion and corrosion on failed fittings in specialty chemical plant. Part II: Control valve

Yang

Wang

Fei

et al. 2018

Materials & Corrosion

View full text Add to dashboard Cite

show abstract

“…Frequently this leads to the burst in critical parts of piping systems, forced outages, and long term interruptions in operation. The corrosion of pipe elbows in natural gas pipelines and various other industrial systems such as hydrocarbons industries and desalination plants [15][16][17][18][19] was extensively examined and reported.…”

Section: Introductionmentioning

confidence: 99%

Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram

Muthanna

Bouledroua

Meriem-Benziane

et al. 2021

International Journal of Pressure Vessels and Piping

View full text Add to dashboard Cite

Failure investigation of an elbow pipe used in sewage water treatment facility

Garg,

Bansal,

Murtaza

2024

Materials & Corrosion

View full text Add to dashboard Cite

In this research work, a real case of failed ASTM A860 WPHY 65 long elbow pipe coated with inorganic zinc ethyl silicate primer is collected from a treatment facility to investigate the root causes of its failure, which was reported after approximately 28 months of use. The failure was investigated using visual observations, metallurgical analysis using optical emission spectroscopy, mechanical testing, X‐ray diffraction of corrosion product, chemical analysis of sewage and corrosion rate test of the elbow using a three‐electrode potential technique, fractographic analysis using scanning electron microscope along with computational analysis to confirm the results. Through the testing, it was observed that severe depletion in the strength can be attributed to erosion–corrosion caused by various impurities present in the sewage, leading to the generation of corrosion pits and turbulent eddies and stresses generated due to sudden changes in fluid flow direction along with gases present in sewage reacting with a base metal. Various failure mechanisms that have led to pipe failure are discussed in this paper, along with a listing of preventive measures to delay it.

show abstract

Analysis of a failed pipe elbow in geothermal production facility

Cited by 18 publications

References 9 publications

Failure analysis on synergistic effect of erosion and corrosion on failed fittings in specialty chemical plant. Part II: Control valve

Failure analysis on synergistic effect of erosion and corrosion on failed fittings in specialty chemical plant. Part II: Control valve

Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram

Failure investigation of an elbow pipe used in sewage water treatment facility

Contact Info

Product

Resources

About