Mechanical Property, HIC and SSCC Test Analysis of L245NS Anti-Sulfur Bending Pipe

Abstract:

Rational utilization of the anti-sulfur tubes is considerable significance to the reliability and service life of oil-gas pipeline system. Unfortunately, there have been no such researches in the field of anti-sulfur bending pipe. In this paper, the mechanical property test, hydrogen induced cracking(HIC) test and sulfide stress-corrosion cracking(SSC) test were conducted to investigate the Φ406.4×10.31mm L245NS anti-sulfur bending pipe with the technique of induction heating bending. And the test result was analyzed combining with microstructure of pipe. The results show that mechanical properties and HIC behavior of L245NS bending pipe reach the standard with the 890~930°C induction quenching and 580-630°C temper process. The strength and Charpy toughness of inner arc and outer arc are higher than base metal. Most HIC crack initiated at the bainite structure and banded structure. The L245NS anti-sulfur bending pipe exhibits good resistance to SSCC under the NACE TM0177-2005 experiment environment.

• Periodical: Applied Mechanics and Materials (Volume 319)
• Pages: 456-461
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.319.456
• Online since: May 2013
• Authors: Guang San Song, Ke Tong, Xiao Dong He
• Keywords: Anti-Sulfur Bending Pipe, Hydrogen Induced Cracking (HIC), Mechanic Property, Metallographic Microstructure, Sulfide Stress-Corrosion Cracking (SSC)

References

[1] Li Helin. Hot topics in study and application of steel line pipe for natural gas transportation [J]. China Mechanical Engineering, 2000, 23(3): 43-61.

[2] Liu Zhiyong, Dong Chaofang, Jia Zhijun, et al. Pitting corrosion of X70 pipeline steel in the simulated wet storage environment [J]. Acta Metallurgica Sinica, 2011, 47(11): 1009-1016.

[3] Zhou Qi, Ji Genshun, Zhang Jianbin, et al. The effect of sulfides on Hydrogen-induced cracking [J]. Journal of Materials Engineering, 2002, 9:37-39.

[4] V. Venegasa, F. Caleyoa, T. Baudin, et al. On the role of crystallographic texture in mitigating hydrogen-induced cracking in pipeline steels [J]. Corrosion Science, 2011, 53(12): 4204-4212.

DOI: 10.1016/j.corsci.2011.08.031

[5] Carneiro R A, Ratnapuli R C, Lins V C. The influence of chemical composition and microstructure of API linepipe steels on hydrogen induced cracking and sulfide stress corrosion cracking [ J]. Materials Science and Engineering A, 2003, (A357): 104-110.

DOI: 10.1016/s0921-5093(03)00217-x

[6] Lopez H F, Raghunath R, Albarran J L, et al. Microstructural aspects of sulfide stress cracking in an API X80 pipeline steel[J]. Metallurgical and Materials Transactions A, 1996, (27A): 3601-3611.

DOI: 10.1007/bf02595451

[7] Zhao Xuehui, Xu Ziqiang, Han Yan, et al. Research on the corrosion-resistant performance of tubing steel in the acid simulation environment [J]. China Petroleum Machinery, 2011, 39(1): 8-12.

[8] Tong ke, Han Xinli, He Xiaodong, et al. Analysis on properties and hydrostatic burst test of X80 induction heated bending pipe [J]. Welded Pipe and Tube, 2010, 33(11): 22-27.

[9] Li Helin, Guo Shengwu, Feng Yaorong, et al. Analysis and identify picture of high strength low alloy pipeline steel microstructure [M]. Petroleum Industry Press, 2001.

[10] Tong Ke, Zhuang Chuanjing, Zhu Lixia, et al. Research and prospect on relationship between microstructure characteristic and strength-toughness of high grade pipeline steel [J]. Materials Review, 2010, 24(2): 98-101.

DOI: 10.1115/ipc2010-31071

[11] Xie Guangyu, Tang Di, Wu Huibin, et al. Investigation of sulfide stress-corrosion cracking for X70 pipeline steel [J]. Physics Examination and Testing, 2008, 26(1): 26-29.