Beijing Safetech Pipeline Co.

Haidian District, China

Beijing Safetech Pipeline Co.

Haidian District, China
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Jiang Z.,Safetech Research Institute Beijing Co. | Cao G.,Petrochina | Ge C.,Beijing Safetech Pipeline Co. | Gu Q.,Petrochina | And 2 more authors.
NACE - International Corrosion Conference Series | Year: 2017

While HVDC transmission runs in monopolar mode, a large direct current will enter into the earth through its earth electrode. This current may cause serious interference on buried pipeline even though it is far away from the earth electrode. In this work, numerical simulation was used to study the mechanism and influencing factors of HVDC interference. The results indicated that while a large direct current entered into the earth through the earth electrode, it could create a strong electric field and induce serious interference on the pipeline. The better the pipeline's coating was, the higher interference the pipeline suffered. Mitigating grounding beds had interaction with each other. The mitigating effectiveness was decided by the location and ground resistance of each mitigation grounding bed. Then, a field experiment was carried out to verify numerical simulation results. © 2017 by NACE International.


Du Y.,University of Science and Technology Beijing | Tang D.,Beijing Safetech Pipeline Co. | Lu M.,University of Science and Technology Beijing | Chen S.,Beijing Safetech Pipeline Co.
NACE - International Corrosion Conference Series | Year: 2017

The research status of AC corrosion risk assessment criteria for cathodic protected carbon steel was introduced initially. Then AC interference experiments were carried out to study the effects of AC interference on cathodic protection (CP) parameters and corrosion behavior. The changes of CP potential and current density under AC interference and AC corrosion rates in different conditions were obtained. Based on the experiment results, the determination of effective CP potential under AC interference was analyzed and the corrosion rates in three different corrosive media under the same level of CP and AC interference were compared. Besides, the reason for the instant shift of CP potential when AC interference is applied was discussed. The results could provide reference for the determination of CP parameters in the presence of AC interference and the improvement of existing AC corrosion risk assessment criteria for cathodic protected carbon steel. © 2017 by NACE International.


Li X.,Beijing Gas Group Company Ltd | Liang Y.,University of Science and Technology Beijing | Du Y.,University of Science and Technology Beijing | Tang D.,Beijing Safetech Pipeline Co. | And 2 more authors.
NACE - International Corrosion Conference Series | Year: 2017

The development of gas network, transportation and power facilities created the interference issues to the urban gas pipelines from alternating current (AC) power lines. Due to the limited space in urban area, the widely used of AC mitigation methods face great challenge when applied to urban gas pipelines. AC mitigation for urban gas pipelines has become more and more problematic. This study attempted to exemplify the AC mitigation design practice for an urban gas pipeline by numerical calculation, including AC interference risk evaluation, AC mitigation design and mitigation effectiveness assessment. Field tests were conducted to collect data along the pipeline right-of-way (ROW) and evaluate the risk of AC interference. Based on the collected information, a computing model was also established for pursuing the most cost-effective and environment-friendly mitigation methods. At last, the effectiveness of such AC mitigation was assessed through field tests. © 2017 by NACE International.


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.


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.


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.


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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