油田地面工程管道防腐施工技术的应用分析

主要研究油田地面工程管道防腐施工技术,分析了油田地面工程管道腐蚀机理和类型,在此基础上,对油田地面工程管道防腐蚀施工技术进行了探讨。     

关于油田地面工程管道防腐施工技术的分析

原油运输中必须借助管道系统进行处理,对应管道防腐效果对原油管道运输具有极大影响.为此,必须及时进行油田地面工程腐蚀现状及原因分析,并制定针对性措施进行处理,保证石油安全稳定运输.本文针对油田地面工程腐蚀原因进行了分析,介绍了油田地面工程管道防腐施工技术应用.     

油田地面工程管道防腐施工技术应用

现阶段油田地面工程建设规模日渐扩大,管道种类增多,存在于管道运行期间的腐蚀问题更加严重.为最大限度延长管道运行寿命,保障油田生产效益,还需要着重在油田地面工程管道建设与维护期间使用防腐施工技术.基于此,本文首先分析了引发油田地面工程管道腐蚀问题的原因,提出现阶段油田地面工程管道常见防护技术种类,以供参考.     

油田地面工程管道防腐施工技术应用探究

近年来,随着社会主义现代化建设的不断发展,我国国民经济建设对能源的需求量也大幅度提高。石油是一种基础能源,石油的需求量上涨,给石油地面工程建设水平尤其是管道防腐技术提出了更高的要求。文章先简单分析了导致油田地面工程管道腐蚀的原因,然后就油田地面工程管道防腐施工技术和措施进行了探讨、分析,以期能有助于油田地面工程科学施工和油田管道防腐。     

油田地面工程管道防腐施工技术的应用

石油作为一种基础能源为我国的发展提供了源源不断的动力,在石油需求量不断提升的同时,相关部门及单位对石油地面工程的建设标准更加严格,特别是油田地面工程管道防腐施工技术和质量,更是引起了社会的广泛关注。接下来,本文将结合油田地面工程管道防腐的重要性,探讨油田地面工程管道防腐施工技术。     

油田地面工程管道防腐施工技术

石油资源的运输过程中,地面工程管道发挥着重要的作用,但是管道在长时间的使用过程中,不可避免的会发生腐蚀现象,影响油田石油资源的正常输送。本文主要阐述了油田地面工程管道腐蚀产生的原因,对油田地面工程管道防腐技术及应用进行分析。     

油田地面建设设备安装与集输管道施工技术探讨

在油田工程大量建设的情况下,地面工程建设的设备安装与技术管道施工直接决定了油田地面工程建设的质量,也与油田开发的效率息息相关。本文主要探讨了油田地面工程建设中设备安装与技术管道施工的技术,为相关工作的开展提供参考。     

油田地面工程管道防腐施工技术的应用分析

当前石油资源运输是石油企业生产活动的关键性环节,在运输的过程中需要做好管道传输保护工作,重视油田地面安全管理。油田地面工程管道由于周围环境和运输物质的影响,很容易出现腐蚀情况,影响运输安全。本文是针对油田地面工程管道防腐施工技术运用情况进行分析,指导施工人员注意要点。     

浅析防腐技术在管道施工中应用

石油作为企业生产主要原材料被广泛应用到各行业领域当中,对其进行输送时需要应用到管道,因此对油田管道的防腐工作是至关重要的,采取有效的防腐措施能够有效提升管道使用寿命。接下来,本文将结合加强油田地面工程管道防腐施工的意义。探讨油田地面工程管道防腐施工技术。     

油田地面工程管道防腐施工技术研究分析

石油安全将直接影响到国家的经济发展和民生建设,而石油安全的重要保障途径是确保石油资源的运输安全,而这也是油田生产活动中最为关键的工作内容之一,更是油田地面工程管理施工的重中之重。针对油田地面工程管道防腐施工技术进行分析,讨论管敷设过程中导致腐蚀问题产生的原因,并对油田地面工程管道防腐施工技术进行讨论,希望能够进一步提高我国石油安全保障力度。     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

Thermodynamics Study on the Decomposition of Chromite with KOH

Institute of Process Engineering, Chinese Academy of Sciences, China, has proposed a method for oxidative leaching of chromite with potassium hydroxide. Understanding the mechanism of chromite decomposition, especially in the potassium hydroxide fusion, is important for the optimization of the operating parameters of the oxidative leaching process. A traditional thermodynamic method is proposed and the thermal decomposition and the reaction decomposition during the oxidative leaching of chromite with KOH and oxygen is discussed, which suggests that chromite is mainly destroyed by reactions with KOH and oxygen. Meanwhile, equilibrium of the main reactions of the above process was calculated at different temperatures and oxygen partial pressures. The stable zones of productions, namely, K2CrO4 and Fe2O3, increase with the decrease of temperature, which indicates that higher temperature is not beneficial to thermodynamic reactions. In addition, a comparison of the general alkali methods is carried out, and it is concluded that the KOH leaching process is thermodynamically superior to the conventional chromate production process.     

Influence of Heat Treatment on Damping Behaviour of the Magnesium Wrought Alloy AZ61

The effect of isochronal heat treatments for 1h on variation of damping, hardness and microstructural change of the magnesium wrought alloy AZ61 was investigated. Damping and hardness behaviour could be attributed to the evolution of precipitation process. The influence of precipitation on damping behaviour was explained in the framework of the dislocation string model of Granato and Lücke.     

Effect of Rare Earth Doping on Impedance,Modulus and Conductivity Properties of Multiferroic Composites:0.5(BiLa_xFe_(1-x)O_3)–0.5(PbTiO_3)

The Lanthanum-doped bismuth ferrite–lead titanate compositions of 0.5(Bi LaxFe1-xO3)–0.5(Pb Ti O3)(x = 0.05,0.10,0.15,0.20)(BLxF1-x-PT) were prepared by mixed oxide method.Structural characterization was performed by X-ray diffraction and shows a tetragonal structure at room temperature.The lattice parameter c/a ratio decreases with increasing of La(x = 0.05–0.20) concentration of the composites.The effect of charge carrier/ion hopping mechanism,conductivity,relaxation process and impedance parameters was studied using an impedance analyzer in a wide frequency range(102–106Hz) at different temperatures.The nature of Nyquist plot confirms the presence of bulk effects only,and non-Debye type of relaxation processes occurs in the composites.The electrical modulus exhibits an important role of the hopping mechanism in the electrical transport process of the materials.The ac conductivity and dc conductivity of the materials were studied,and the activation energy found to be 0.81,0.77,0.76 and 0.74 e V for all compositions of x = 0.05–0.20 at different temperatures(200–300 °C).     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

Growth Kinetics of Single Inclusion Particle in Molten Melts

On the basis of the single-particle framework, a new theory on inclusion growth in metallurgical melts is developed to study the kinetics of inclusion growth on account of reaction and collision. The studies show that the early growth of inclusion depends on reaction growth and Brawnian motion collision, and where the former is decisive, the late growth depends on turbulence collision and Stokes＇ collision, and where the former is dominant; collision growth is very quick during the smelting process, lessened in the refining process, but nearly negligible in the continuous casting process.     

Theoretical Analysis for the Motion and Temperature of Melt Droplets in Spray Degassing Process

The motion of melt droplets in spray degassing process was analyzed theoretically. The height of the treatment tank in spray degassing process could be determined by the results of theoretical calculation of motion of melt droplets. To know whether the melt droplets would solidify during spraying process, the balance temperature of melt droplets was also theoretically analyzed. Then proof experiments for theoretical results about temperature of melt droplets were carried. In comparison, the experimental results were nearly similar to the calculation results.     

Using Finite Element and Contour Method to Evaluate Residual Stress in Thick Ti-6Al-4V Alloy Welded by Electron Beam Welding

This work was to reveal the residual stress profile in electron beam welded Ti-6Al-4V alloy plates(50 mm thick) by using finite element and contour measurement methods.A three-dimensional finite element model of 50-mmthick titanium component was proposed,in which a column–cone combined heat source model was used to simulate the temperature field and a thermo-elastic–plastic model to analyze residual stress in a weld joint based on ABAQUS software.Considering the uncertainty of welding simulation,the computation was calibrated by experimental data of contour measurement method.Both test and simulated results show that residual stresses on the surface and inside the weld zone are significantly different and present a narrow and large gradient feature in the weld joint.The peak tensile stress exceeds the yield strength of base materials inside weld,which are distinctly different from residual stress of the thin Ti-6Al-4V alloy plates presented in references before.     

Microstructures and Tensile Properties of Ultrafine-Grained Ni–(1–3.5) wt% SiC_(NP) Composites Prepared by a Powder Metallurgy Route

Silicon carbide nanoparticle-reinforced nickel-based composites(Ni–Si CNP),with a Si CNPcontent ranged from1 to 3.5 wt%,were prepared using mechanical alloying and spark plasma sintering.In addition,unreinforced pure nickel samples were also prepared for comparative purposes.To characterize the microstructural properties of both the unreinforced pure nickel and the Ni–Si CNPcomposites transmission electron microscopy(TEM) was used,while their mechanical behavior was investigated using the Vickers pyramid method for hardness measurements and a universal tensile testing machine for tensile tests.TEM results showed an array of dislocation lines decorated in the sintered pure nickel sample,whereas,for the Ni–Si CNPcomposites,the presence of nano-dispersed Si CNPand twinning crystals was observed.These homogeneously distributed Si CNPwere found located either within the matrix,between twins or on grain boundaries.For the Ni–Si CNPcomposites,coerced coarsening of the Si CNPassembly occurred with increasing Si CNPcontent.Furthermore,the grain sizes of the Ni–Si CNPcomposites were much finer than that of the unreinforced pure nickel,which was considered to be due to the composite ball milling process.In all cases,the Ni–Si CNPcomposites showed higher strengths and hardness values than the unreinforced pure nickel,likely due to a combination of dispersion strengthening(Orowan effects) and particle strengthening(Hall–Petch effects).For the Ni–Si CNPcomposites,the strength increased initially and then decreased as a function of Si CNPcontent,whereas their elongation percentages decreased linearly.Compared to all materials tested,the Ni–Si CNPcomposite containing 1.5% Si C was found more superior considering both their strength and plastic properties.