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Notices for Connection Modes of Pipeline Engineering

Pipeline connection is inevitable in every pipeline project, and it is also one of the most important factors that directly determine the quality of pipeline project. We summarize the major and minor matters needing attention in various pipeline connection modes, hoping to provide you with reference and help you improve the quality of pipeline engineering. Screw connection Flange connection Welding Socket connection Bonding Sleeve connection Hot melt connection Groove connection Screw connection (1) If it is necessary to break the pipe on the spot according to the surveying and mapping sketch, attention should be paid to cleaning the iron film […]

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What is titanium alloy?

What is titanium alloy? Titanium alloy is alloy based on titanium with other elements added. Titanium has two kinds of homogeneous heterogeneous crystals: alpha titanium with dense hexagonal structure below 882℃ and beta titanium with body-centered cubic structure above 882℃. Alloy elements can be classified into three categories according to their effects on phase transformation temperature: (1) The elements that stabilize the alpha phase and increase the phase transition temperature are alpha stable elements, such as aluminium, carbon, oxygen and nitrogen. Among them, aluminium is the main alloy element of titanium alloy. It has obvious effect on improving the strength […]

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What is nickel?

What is nickel? Ni is the chemical symbol of nickel in the VIIIB group of the periodic table and its atomic number is 28. Its density is 8.908 g/cm³. The melting and boiling points of nickel are 1728K (1455 °C, 2651 °F) and 3186 K, (2913 °C, 5275 °F) respectively. Pure nickel is a silvery grey metal. When it is exposed to air, a layer of the basic oxide surface is formed to protect nickel from further oxidation. Therefore, the nickel we see is usually grey white. Nickel is hard, malleable, ductile and can be highly polished. It is the […]

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What is titanium?

What is titanium? Titanium is known as a transition metal on the periodic table of elements and is denoted by the symbol Ti. It is a lightweight, silver-gray material with an atomic number of 22 and an atomic weight of 47.90. It has a density of 4.54g/cm3 , which is somewhere between the densities of aluminum and stainless steel. It has a melting point of roughly 1,667°C and a boiling point of 3,287°C. Rutile and ilmenite, the two primary minerals which contain titanium, make up 24% of the earth’s crust, thus making titanium the ninth most abundant element on the […]

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Analysis of Forging Technology for Stainless Steel

Stainless steel is widely used in national defense industry, chemical industry, petroleum industry and power sector, and many products require not only corrosion resistance, but also high strength, so most stainless steel must be used after forging. Compared with carbon steel, stainless steel has different characteristics: low thermal conductivity, narrow forging temperature range, strong superheat sensitivity, high resistance at high temperature and low plasticity, which bring many difficulties to forging production, and different types of stainless steel forging process are also different. You can click the following links, which bring you to the related content. Forging of Austenitic Stainless Steel […]

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What is Forging?

What is Forging? Ⅰ. Definition and classification of forging 1. Definition of forging Forging is a kind of processing method that uses forging machinery to exert pressure on metal blanks to produce plastic deformation to obtain forgings with certain mechanical properties, shape and size. Forging (forging and stamping) is one of the two major components. Forging can eliminate the defects such as as-cast looseness and optimize the micro-structure of metals in the smelting process. At the same time, the mechanical properties of forgings are generally better than those of castings of the same material because of the preservation of complete metal […]

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Connection Structure of Heat Exchanger Tube and Tube Plate in the Design of Sh……

Heat exchangers are widely used in chemical industry, petroleum, medicine, atomic energy and nuclear industry, and their types and structures are also numerous. Shell and tube heat exchangers are the most commonly used. In the design and manufacture of shell and tube heat exchangers, the connection between heat exchanger tubes and tube sheets directly affects the normal operation of the process, and even forces the whole production line to stop production. Therefore, the technical research on the joint type of heat exchanger tube and tube sheet has always been the focus of attention of domestic and foreign technicians. 1 Common […]

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Failure Forms and Preventive Measures of Parts and Components of Shell-and-Tub……

I. Composition and Structure of Shell and Tube Heat Exchanger Shell-and-tube heat exchanger is a traditional and widely used heat exchange equipment. Because of its strong structure and the ability to choose a variety of materials, it has strong adaptability. Shell-and-tube heat exchangers are widely used in various industries. They are often used as oil coolers in dilute oil stations in cement production enterprises and oil coolers in vehicle engines. For a long time, steel shell-and-tube heat exchangers have been dominant in the production and use of heat exchangers because of their strong structure, high reliability, strong adaptability and wide […]

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What is a corrugated pipe?

What is a corrugated pipe? Corrugated pipe: It is a cylindrical thin-walled folded shell with multiple transverse corrugations. Bellows are elastic and can produce displacement under the action of pressure, axial force, transverse force or bending moment.Bellows are commonly called corrugated pipe or corrugated box in America and metallbulgen or metal bellows in Europe. Types Material Metal expansion joint Non-metallic Expansion Joint Metal hose Metal bellows Types of Corrugated pipes Corrugated pipes mainly include metal bellows, bellows expansion joints, corrugated heat exchanger tubes, diaphragm diaphragm boxes and metal hoses. Metal bellows are mainly used to compensate thermal deformation, shock absorption […]

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Corrosion Behavior of Materials Used for Surface Gathering and Transportation ……

In recent years, with the expansion of oil and gas field exploitation, the development of natural gas industry and the construction of gathering and transportation pipelines, oil pipelines are bound to be affected by internal environment and media in the process of transporting crude oil, resulting in more and more serious corrosion. Corrosion of gathering and transportation pipelines will not only cause pipeline damage, oil and gas leakage, cause safety accidents, cause environmental pollution, endanger people’s health, damage property safety, but also bring great hindrance to the development of oil and gas fields, at the same time lead to adverse […]

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