Analysis of a Failed Primary Superheater Tube and Life Assessment in a Coal-Fired Powerplant

Ilman, Mochammad Noer; Prihajatno, Muji; Kusmono, Kusmono

doi:10.1007/s11668-015-9932-9

Cited by 4 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Likewise, condensed water from high pressure inside the tube or seawater can permeate the annular space due to damage to the outer sheath during installation. This combination of water and acid gases creates an acid environment, which initiates corrosion, shortening the service life of flexible pipes 15–21 …”

Section: Introductionmentioning

confidence: 99%

Poly(vinylidene fluoride) with zinc oxide and carbon nanotubes applied to pressure sheath layers in oil and gas pipelines

Gondim

Tienne

Cruz

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this work, PVDF composites containing 0.2% (m/m) of carbon nanotubes (MWCNTs), PVDF with 5.0% (m/m) of zinc oxide (ZnO), and composites containing both particles in the same contents in the matrix were melt processed in a mini-extruder machine with double screws, using the counter-rotation mode. Composites were characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), dynamic-mechanical analysis (DMA), and contact angle tests (CA). The samples presented the predominance of the α phase, with an increased degree of crystallinity as well as an increase in dimensional stability by incorporating both fillers, showing a synergistic effect between these particles, as shown on FTIR, DSC, and XRD results. SEM images showed a good dispersion of high aspect ratio particles. In general, DMA and TGA analysis showed that composites had not decreased their thermal and mechanical performance when compared to neat PVDF. Results of CA analysis showed an increase in the hydrophobicity of the sample containing MWCNTs. Permeability tests were also performed using a differential pressure system, combining high temperature and pressure, obtaining permeability measures and time lag. This work presents an alternative of composite materials, suggesting its application in the internal pressure sheath layers of oil and gas flexible pipes. K E Y W O R D S composites, nanoparticles, nanotubes, oil and gas, thermoplastics 1 | INTRODUCTION Flexible pipes are transportation lines used to connect the wells, in the seabed, to the production units, transporting oil and gas fluids in offshore applications. These pipes possess a multilayer structure, with polymeric layers and helically wound metallic wires, designed to withstand tensile loads, high pressure, and temperature. 1-3 Different layer combinations are possible, depending on the intended service conditions. Still, in general, flexible risers present a typical configuration, with the following layers: interlocked carcass (metal),

show abstract

Section: Introductionmentioning

confidence: 99%

Poly(vinylidene fluoride) with zinc oxide and carbon nanotubes applied to pressure sheath layers in oil and gas pipelines

Gondim

Tienne

Cruz

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The contribution of several factors appears to be responsible for failures, culminating in the partial or complete shutdown of the plant. A survey of the literature [1][2][3][4][5][6] pertaining to the performance of steam boilers during the last 30 years shows that abundant cases have been referred to, concerned with the failure of boilers due to fuel ash corrosion, overheating, hydrogen attack, carburization and decarburization, corrosion fatigue cracking, stress-corrosion cracking, caustic embrittlement, erosion, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of forced outages of power boilers are due to premature failure of boiler components [1][2][3][4][5][6][7] . Boiler tube failures are the main cause of forced outages of power generating units.…”

Section: Introductionmentioning

confidence: 99%

Korosi Retak Tegang pada Pipa Superheater Ketel Uap yang Baru Dibangun [Stress Corrosion Cracking of Cage Superheater Tubes of a Newly Built Boiler]

Adnyana¹

2017

metal.

View full text Add to dashboard Cite

IntisariSejumlah pipa penukar panas lanjut pada sebuah ketel uap yang baru dibangun diketemukan bocor selama operasi komisioning yang pertama. Kebocoran terjadi ketika ketel uap baru saja mencapai tekanan 23,7 barg dan temperatur 405 °C dari tekanan dan temperatur operasi yang direncanakan yaitu 53 barg dan 485 °C. Dalam makalah ini dibahas jenis kerusakan dan faktor-faktor yang kemungkinan telah menyebabkan terjadinya kebocoran pada pipa penukar panas lanjut tersebut. Penelitian/pengujian metalurgi telah dilakukan dengan mempersiapkan sejumlah benda uji yang diperoleh dari salah satu potongan pipa yang bocor tersebut. Berbagai pengujian laboratorium telah dilakukan meliputi: uji makro, analisa komposisi kimia, uji metalografi, uji kekerasan dan uji SEM (scanning electron microscopy) yang dilengkapi dengan analisis EDS (energy dispersive spectroscopy). Hasil penelitian/pengujian metalurgi yang diperoleh menunjukkan bahwa pipa penukar panas lanjut yang bocor tersebut telah mengalami retak korosi tegangan yang disebabkan oleh efek kombinasi antara korosi dan tegangan tarik. Unsur korosif yang kemungkinan dapat menimbulkan terjadinya retak korosi tegangan pada pipa penukar panas lanjut adalah kaustik sodium (Na) dan elemen-elemen lainnya pada tingkatan yang relatif rendah seperti Ca, Cl, S dan P. Kata Kunci: Pipa penukar panas lanjut, penelitian/pengujian metalurgi, retak korosi tegangan, kaustik sodium (Na) Abstract

show abstract

Research on Remaining Life Evaluation Method of T92 Steel for Superheater Tube Based on Oxide Layer Growth

Wei

Zhou

2019

J Fail. Anal. and Preven.

View full text Add to dashboard Cite

Analysis of a Failed Primary Superheater Tube and Life Assessment in a Coal-Fired Powerplant

Cited by 4 publications

References 9 publications

Poly(vinylidene fluoride) with zinc oxide and carbon nanotubes applied to pressure sheath layers in oil and gas pipelines

Poly(vinylidene fluoride) with zinc oxide and carbon nanotubes applied to pressure sheath layers in oil and gas pipelines

Korosi Retak Tegang pada Pipa Superheater Ketel Uap yang Baru Dibangun [Stress Corrosion Cracking of Cage Superheater Tubes of a Newly Built Boiler]

Research on Remaining Life Evaluation Method of T92 Steel for Superheater Tube Based on Oxide Layer Growth

Contact Info

Product

Resources

About