Haidian District, China
Haidian District, China

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Wang J.,Qingdao China Petroleum EDI Safety and Environment Protection Co. | Wang X.,Beijing Safetech Pipeline Co. | Lu M.,University of Science and Technology Beijing
Advanced Materials Research | Year: 2012

Pipeline repair and reinforcement technology can generally be categorized into three main types: Welding, Clamp, Fiber Composite. Fiber Composite Repair recently undergoes fast development because it does not require heat or welding and can be directly applied to high pressure transmission pipeline. This article summarizes Fiber Composite Repair technology and its mechanism, also compares the application characteristics of Glass Fiber, Carbon Fiber and Basalt Fiber composites and finally concludes broad application prospects of Carbon Fiber Composite in pipeline repair and reinforcement. © (2012) Trans Tech Publications, Switzerland.

Hou S.-y.,Beijing Safetech Pipeline Co. | Liu G.,Beijing Safetech Pipeline Co. | Wang X.-y.,Beijing Safetech Pipeline Co. | Ruan J.-h.,Beijing Safetech Pipeline Co.
Corrosion and Protection | Year: 2012

The reason of corrosion, method of corrosion control and the effett of region cathodċc protection(cp) in stations were presented in this paper. Some corrosion factors including soil corrosiveness, failure of coating and galvanic corrosion were introduced. The data of cathodic protection in a station was measured and the effect of CP on the buried pipeline was listed.

Dong K.,University of Science and Technology Beijing | Liu W.,Beijing Safetech Pipeline Co. | Zhu R.,University of Science and Technology Beijing
High Temperature Materials and Processes | Year: 2015

In this paper, measurement method of EAF Steelmaking decarburization rate is studied. Because of the fuel gas blown and air mixed, the composition of hot temperature off-gas is measurand unreally, and the flow rate is unknown too, the direct measurement of EAF decarburization rate by furnace gas analysis is unrealized. Firstly, the off-gas generation process is discussed. After that, dynamic concentration of CO2, CO, and O2 in off-gas and EAF oxygen supply rate are monitored in real time. Finally, the concentration and volume flow rate of off-gas are obtained to measure the EAF decarburization rate indirectly. The results of the hot state experiments show that the decarburization rate in oxidization step can reach up to about 0.53 mol/s, and the forecasting carbon concentration is 1.14% corresponding to the average carbon concentration (1.43%) in finial metal samples. The measurement of decarburization rate by off-gas analysis technique can be reasonable in EAF production process. © 2015 by De Gruyter 2015.

Dong K.,University of Science and Technology Beijing | Zhu R.,University of Science and Technology Beijing | Liu W.,Beijing Safetech Pipeline Co.
High Temperature Materials and Processes | Year: 2015

In this paper, a calculation model for decarburization kinetic in solid metal melting process is studied. Firstly the macro-kinetic model is established, and the melting and decarburization process is divided into five steps, which are adsorption and dissolution of O2, liquid phase mass transfer of [C], interfacial reaction of [C] and [O], diffusion of CO gas, and melting and dropping of metal. Secondly based on the assumptions that the total decarburization process is steady at the reaction temperature of 1800 K, the interface reaction is in equilibrium state, the composition in the liquid metal is homogenous, all the activity coefficients are 1 and so on, the calculation model is simplified into equations set with six formulas, and is calculated under 10584 conditions with the help of VB software. Results show that the C or O2 deliverability is the restricted link under different conditions. Finally, a decarburization experiment of melting pig iron at the rate of 0.56 kg/(s.m2) is achieved, and it proves that the simplified calculation model is in uniform with the actual data at a low melting rate. © 2015 by De Gruyter.

Huimin Q.,Beijing Safetech Pipeline Co. | Minxu L.,University of Science and Technology Beijing | Xiuyun W.,Beijing Safetech Pipeline Co. | Liang D.,University of Science and Technology Beijing | And 2 more authors.
NACE - International Corrosion Conference Series | Year: 2014

In order to control corrosion of sub-high-pressure natural gas pipeline which is caused by dynamic DC stray current interference, a series of cathodic protection related parameters were tested, including pipe-to-soil potential, soil resistivity, sacrificial anode performance and stray current parameters. The test results show that dynamic DC stray current, which is always flowing in or out of anode, is one of the main interference sources for the pipeline. A pre-feasibility study using a forced current drainage method and a polarity drainage method were carried out on a 4 km pipeline segment. According to the results of the experimental test section, the polarity drainage method can improve the cathodic protection effect and therefore was applied to the whole pipeline.. Also, some pipeline segments, which originally failed to meet the CP criteria, were thereafter shown to meet the criteria. © 2014 by NACE International.

Kai D.,University of Science and Technology Beijing | Long W.,The MCC Group | Wenjuan L.,Beijing Safetech Pipeline Co. | Rong Z.,University of Science and Technology Beijing
Steel Research International | Year: 2014

Red mud is unmanageable industrial waste produced from aluminum industry, which is difficult to be disposed and recycled with traditional method. In this paper, refining desulfurization slag was made from the reduced red mud, and the desulfurization abilities of the slag and the recovery rates of the metal Fe are studied. With thermodynamic simulation, orthogonal experiments, and verification experiment, it is found that binary basicity has significant effect on LS and ηs, while the effects of Al2O3 concentration in slag and the quantity of the reduced red mud are not obvious. The optimal combination with the best desulfurization ability can be derived as A3B2C2, which means the binary basicity of the optimal slag is 7, the concentration of Al2O3 is 30%, and the wt% of the residue is 15%, which means the reduced red mud quantity is 132.92g. At the same time, the recovery rate of Fe element increases with the quantity of the reduced red mud, and the recovery rate of metal Fe in optimal combination slag is 87.84%. The separation of the metal Fe from the reduced red mud is satisfactory. The refining desulfurization slag manufacturing is a feasible method on the disposal and recycling of the red mud. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Zhang Y.-H.,Beijing Safetech Pipeline Co. | Wang X.-Y.,Beijing Safetech Pipeline Co. | Ruan J.-H.,Beijing Safetech Pipeline Co.
Corrosion and Protection | Year: 2013

Viscoelastic tape are used widely in the field of pipeline anticorrosion. But many customers are not familiar with the performance of viscoelastic tapes, such as application standard and acceptance standard. Besides, how does the viscoelastic tape protect metal, when the adhesion between viscoelastic tape and metal is low. In this paper, 5 kinds of viscoelastic tape and outer protection tapes are introduce. They are viscoelastic tape of ST and HT, viscopaste, viscocure of HT, PE outer protection tape. These products can be used cooperatively according to different temperatures, the anticorrosion effect is good. And the CSA and GB standard of each performance test are listed. The appropriate application and operating environments for viscoelastic tapes are clear and definite through comparison and explaining technology parameters. Two sucessful project cases are listed.

Chen F.,Shenzhen Gas Corporation Ltd. | Zhou J.-X.,Shenzhen Gas Corporation Ltd. | Mu N.-X.,Beijing Safetech Pipeline Co.
Corrosion and Protection | Year: 2013

Urban rail transit causes severe DC stray current interference on buried pipelines. In order to understand the DC stray current impact on pipelines, a pipeline which was severely interfered by stray current was selected for testing. Polar drainage and ground drainage were used and a polarity draineger was installed in the testing device. Before and after the drainage, the cathodic protection potential data were continuously monitored at the test stub. The results show that the potential of the pipeline protection reached the normal value and the pipeline was protected.

Duan S.,University of Science and Technology Beijing | Zhou Y.,University of Science and Technology Beijing | He J.,University of Science and Technology Beijing | Wang Q.,University of Science and Technology Beijing | Wang J.,Beijing SafeTech. Pipeline Co.
2012 the 1st IEEE Workshop on Enabling Technologies for Smartphone and Internet of Things, ETSIoT 2012 | Year: 2012

We present PipeInternet, a self-contained Information acquisition system based on integration of WSNs (Wireless Sensor Networks) for sensing and smartphone for monitoring. Using only the 3G module readily available in modern smartphones, we accurately profile the states of the remote pipeline by analyzing the data from sensor nodes and provide instructions without the need for additional infrastructure. We propose a redundant linear chain clustering multi-hop protocol (CCHop) for strengthening the transmission reliability, and a lightweight bidirectional time synchronization algorithm (LBSync) packed in ACK for calibrating work timeslot of node. Smartphones with android 2.2 as handy monitor and reduced smart nodes were designed to achieve an intelligent pipeline monitoring system. Field application and simulation results show the accuracy of gathering current pipeline data or alarm, and resuming program update from breakpoint by air in PipeInternet. © 2012 IEEE.

Dong K.,University of Science and Technology Beijing | Wu L.,The MCC Group | Liu W.-J.,Beijing Safetech Pipeline Co. | Zhu R.,University of Science and Technology Beijing
ISIJ International | Year: 2014

The desulfurization ability of CaO-Al2O3-SiO2-TiO2 slag at 1 873 K was studied through the slag-metal desulfurization experiment by using a 10 kg inductive furnace and through theoretical calculation by using thermodynamic software FactSage. The experimental index considered were the sulfur distribution coefficient of the slag (LS) and the desulphurization ratio (νS). The effect factors were binary basicity, the mass percentage of Al2O3 and TiO2. Research results are as follows. The effect of binary basicity is significant, compared with the mass percentage factors of Al2O3 and TiO2. Under the optimal experimental conditions, with the binary basicity is 7, the mass percentage of Al2O3 is 30% and TiO2 is 3%, the corresponding highest sulfur distribution coefficient for the slag are 58.14. While the content of TiO2 in the CaO-Al2O3-SiO2- TiO2 slag is in a range lower than 3-4%, the desulfurization ability of the CaO-Al2O3-SiO2-TiO2 slag is equal to that of the CaO-Al2O3-SiO2 slag. The slag system with TiO2 can meet the desulfurization requirements of steelmaking, which is a good way for resource utilization of solid waster containing titanium. © 2014 ISIJ.

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