Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Corrosion Fatigue Of X80 Weld In Mild Sour Environment

Picture for Corrosion Fatigue Of X80 Weld In Mild Sour Environment
Available for download

Pipelines and rigid risers made in conventional X65 grade require large wall thickness to withstand the high loads imposed during installation and under operating conditions in deep and ultra-deepwater field developments. The use of high-strength steels like X80 is an attractive alternative since it improves catenary weight by reducing wall thickness.

Product Number: 51322-17778-SG
Author: Laurent Ladeuille, Richard Jones, Yifei Zeng, Xin Yue, Chih-Hsiang Kuo, Florian Thébault, Grégory Toguyeni
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
$0.00
$20.00
$20.00

The developments in deep and ultra-deep waters require the application of heavy wall pipes for steel risers in conventional grades. The utilization of higher-strength grade such as X80 reduces the constraints related to the manufacturing and the installation by saving line pipe weight.
Seamless X80 pipes were manufactured in 323.9 x 25.4 mm and characterized. Girth welding was made using the Gas Metal Arc Welding (GMAW) process on these seamless line pipes. Four-point-bend tests were conducted as per NACE TM0316(2) to evaluate the Sulfide Stress Cracking resistance on X80 pipe and welds.

There are only limited results about the fatigue behavior of high-strength steel welded joints and, especially, in sour environments. Therefore, the performance of X80 mechanized girth weld was assessed in air and in mild sour environment. Fatigue endurance tests were performed in air at room temperature at loading frequencies of 4-8 Hz and completed by tests at 24°C, pH 5.9, 0.1 psi H2S partial pressure using a frequency of 0.2 Hz. The in-air fatigue performance of the X80 girth weld was found to be comparable to X65 tested in similar conditions; the results exceeded the BS 7608 class E target curve. The environmental knock down factor (EKDF), which was obtained by comparing the mean of the in-air data with the mean of sour data, is equal to 10.

The developments in deep and ultra-deep waters require the application of heavy wall pipes for steel risers in conventional grades. The utilization of higher-strength grade such as X80 reduces the constraints related to the manufacturing and the installation by saving line pipe weight.
Seamless X80 pipes were manufactured in 323.9 x 25.4 mm and characterized. Girth welding was made using the Gas Metal Arc Welding (GMAW) process on these seamless line pipes. Four-point-bend tests were conducted as per NACE TM0316(2) to evaluate the Sulfide Stress Cracking resistance on X80 pipe and welds.

There are only limited results about the fatigue behavior of high-strength steel welded joints and, especially, in sour environments. Therefore, the performance of X80 mechanized girth weld was assessed in air and in mild sour environment. Fatigue endurance tests were performed in air at room temperature at loading frequencies of 4-8 Hz and completed by tests at 24°C, pH 5.9, 0.1 psi H2S partial pressure using a frequency of 0.2 Hz. The in-air fatigue performance of the X80 girth weld was found to be comparable to X65 tested in similar conditions; the results exceeded the BS 7608 class E target curve. The environmental knock down factor (EKDF), which was obtained by comparing the mean of the in-air data with the mean of sour data, is equal to 10.

Product tags
Also Purchased
Picture for Corrosion Mechanism of API X80 Steel Material in Sour Environment at Different Temperatures
Available for download

51316-7149-Corrosion Mechanism of API X80 Steel Material in Sour Environment at Different Temperatures

Product Number: 51316-7149-SG
ISBN: 7149 2016 CP
Author: Adel Mohamed
Publication Date: 2016
$20.00

Electrochemical behavior of API X-80 steel materials in 3.5% wt. of NaCl solution containing different concentrations of H2S at different temperatures was studied. Potendiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were used to characterize the corroded API X-80 steel surface.
Picture for Corrosion and Corrosion Products in a Sour Environment from 80°C to 200°C
Available for download

Corrosion and Corrosion Products in a Sour Environment from 80°C to 200°C

Product Number: 51317--9084-SG
ISBN: 9084 2017 CP
Author: Shujun Gao
Publication Date: 2017
$20.00

Corrosion rate of mild steel and character of corrosion products in sour environments at temperatures from 20 to 200°C. H2S-H2O water chemistry model was developed. Then, H2S corrosion tests were done at 80, 120, 160 & 200°C - exposure time of 4 days.
Picture for Corrosion evaluation of tubing steels and material selection in the CO2/H2S coexistent environme
Available for download

51318-11477-Corrosion evaluation of tubing steels and material selection in the CO2/H2S coexistent environment

Product Number: 51318-11477-SG
Author: Nai-yan ZHANG / Zhi ZHANG / Wen-tao ZHAO / Lian LIU / Taihe SHI
Publication Date: 2018
$20.00

To evaluate the applicability of the tubing steels, the corrosion behavior and stress corrosion cracking of tubing steels (P110S, P110-13Cr and duplex stainless steel 2205) were investigated under different H2S partial pressures and temperature.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support