Development of Nb-Bearing High Strength Steel Plates for 150,000 M3 Oil Storage Tank

2017 ◽  
Author(s):  
Zhuzhong Gao ◽  
Qingfeng Ding ◽  
Hongwei Yang ◽  
Jingtao Li ◽  
Genmin Zhu ◽  
...  
Keyword(s):  
Heat Input ◽  
High Strength Steel ◽  
High Strength ◽  
High Energy ◽  
Bearing Steel ◽  
Steel Plates ◽  
Storage Tanks ◽  
Niobium Content ◽  
Oil Storage ◽  
Large Heat

High strength steel plates for oil storage tanks are usually produced by Quenched and Tempered (Q&T) process which results in high energy cost. On the other hand, large-heat-input welding technologies, such as electro-gas welding, have been widely applied during large oil storage tanks construction. In the present paper, High strength steel plates for 150000 m3 oil storage tanks have been developed by Thermal Mechanical Control Process (TMCP) and Tempered process (TMCP-T). The effects of tempered temperature and Niobium content on mechanical performances of plates are investigated. High strength and high toughness as well as excellent large-heat-input weldability for Nb-bearing steel plates are observed and the reasons are discussed.

scholarly journals Specimen Test of Large-Heat-Input Fusion Welding Method for Use of SM570TMCP

2015 ◽  
Vol 2015 ◽  
pp. 1-13
Author(s):  
Dongkyu Lee ◽  
Soomi Shin
Keyword(s):  
Construction Industry ◽  
Heat Input ◽  
High Strength Steel ◽  
High Performance ◽  
High Strength ◽  
Fusion Welding ◽  
Steel Plates ◽  
The Future ◽  
Specimen Test ◽  
Large Heat

In this research, the large-heat-input welding conditions optimized to use the rear plate and the high-performance steel of SM570TMCP, a new kind of steel suitable for the requirements of prospective customers, are proposed. The goal of this research is to contribute to securing the welding fabrication optimized to use the high-strength steel and rear steel plates in the field of construction industry in the future. This research is judged to contribute to securing the welding fabrication optimized to use the high-strength steel and rear steel plates in the field of construction industry in the future.

scholarly journals Improvement in Microstructure and Toughness of Large Heat-input Weld Bond of High Strength Steel Due to Addition of Rare Earth Metals and Boron

1977 ◽  
Vol 17 (7) ◽  
pp. 419-427 ◽  
Author(s):  
Tokushi FUNAKOSHI ◽  
Tomoo TANAKA ◽  
Syuzo UEDA ◽  
Masaaki ISHIKAWA ◽  
Noriaki KOSHIZUKA ◽  
...  
Keyword(s):  
Rare Earth ◽  
Heat Input ◽  
High Strength Steel ◽  
Rare Earth Metals ◽  
High Strength ◽  
Large Heat

Optimization Calculation Method of Wall Thickness for Large Oil Storage Tank Made of High Strength Steel

2015 ◽  
Author(s):  
Haigui Fan ◽  
Zhiping Chen ◽  
Futeng Wan
Keyword(s):  
Wall Thickness ◽  
High Strength Steel ◽  
Storage Tank ◽  
Circumferential Stress ◽  
High Strength ◽  
Optimization Method ◽  
Storage Tanks ◽  
Oil Storage ◽  
Optimization Calculation ◽  
Oil Storage Tank

Optimization calculation method determining wall thickness for large oil storage tank made of high strength steel is investigated in this paper. Taking three oil storage tanks with different volumes of 10×104 m3, 15×104 m3 and 20×104 m3 for examples, the wall thickness calculation methods of API 650, GB 50341, JIS B 8501 and BS EN 14015 have been analyzed and compared. Results show that as the volume of oil storage tank increases, some wall thickness calculation results of the standards have been larger than the allowable value, leading to the unreasonable distribution of the wall circumferential stress. The wall thickness calculation result applying the method of API 650 is more reasonable than other standards. While for the tanks made of high strength steel, like 12MnNiVR (GB 50341), the yield ratio of the steel has reached 0.803, which is larger than the upper limit value of API 650. In order to make up the deficiency, an optimization method based on API 650 is presented, which considers the effects of yield strength, tensile strength and yield ratio on the determination of allowable stress. Taking the 20×104 m3 oil storage tank and selecting a proper welded joint efficiency, the wall thickness is calculated by the presented optimization method. The wall thickness calculation result is more reasonable and the circumferential stress distribution is more homogeneous when the safety factor of tensile strength is taken to be 2.4. Results show that the optimization method is applicable to the thickness calculation of oil storage tanks made of high strength steel.

scholarly journals The Effect of Ca Content on the Formation Behavior of Inclusions in the Heat Affected Zone of Thick High-Strength Low-Alloy Steel Plates after Large Heat Input Weldings

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1328 ◽  
Author(s):  
Yinhui Zhang ◽  
Jian Yang ◽  
Longyun Xu ◽  
Yunlong Qiu ◽  
Guoguang Cheng ◽  
...  
Keyword(s):  
Heat Affected Zone ◽  
Heat Input ◽  
Hsla Steel ◽  
Solidus Temperature ◽  
High Strength ◽  
Steel Plates ◽  
Ca Addition ◽  
Formation Behavior ◽  
Large Heat ◽  
Molten Liquid

Ca deoxidation has been acknowledged recently as an effective oxide metallurgy technology that improves the toughness of the heat affected zone (HAZ) in high-strength low-alloy (HSLA) steel plates after large heat input welding. This paper describes the effect of Ca concentrations on the formation behavior of the non-metallic inclusions in the HAZs of a series of thick HSLA steel plates after large heat input welding at 400 kJ cm−1. The quantitative statistics on the inclusions show that the Ca addition significantly decreases the quantity of the pure MnS sulfide, but increases that of the complex oxysulfide. The pure MnS sulfide precipitates below the solidus temperature, while the complex oxysulfide forms in the molten liquid, leading to the core (oxide) and shell (sulfide) structure. The Ca addition proportionally improves the HAZ toughness of these thick HSLA steel plates, primarily owing to the positive effect of the complex oxysulfides on the refinement of the HAZ microstructure.

scholarly journals Improvement in Microstructure and Toughness of Large Heat-Input Weld Bond Due to Addition of Rare Earth Metals and Boron in High Strength Steel

1977 ◽  
Vol 63 (2) ◽  
pp. 303-312 ◽  
Author(s):  
Tokushi FUNAKOSHI ◽  
Tomoo TANAKA ◽  
Syuzo UEDA ◽  
Masaaki ISHIKAWA ◽  
Noriaki KOSHIZUKA ◽  
...  
Keyword(s):  
Rare Earth ◽  
Heat Input ◽  
High Strength Steel ◽  
Rare Earth Metals ◽  
High Strength ◽  
Large Heat
Sign in / Sign up

Export Citation Format

Share Document