Case Study 1
0Cr18Ni9 bassoon φ530mm × 11mm stainless steel all position levels fixed butt joint oil pipeline is mainly used for power plants, welding more difficult, requiring high quality of welded joints, forming the inner surface required well, moderate bulge after welding requires PT , RT test. TIG welding are used in the past or manual arc welding, the former low efficiency, high cost, which is difficult to guarantee quality and low efficiency. To ensure both the quality and efficiency, the use of TIG, the outside bottom of filler wire welding method, MAG welding fill and cover surface, the quality and efficiency are guaranteed.
0Cr18Ni9 stainless steel thermal expansion, electrical conductivity and the rate of carbon steel and low alloy vary greatly, and the pool of liquidity is poor, poor shape, especially in the all-position welding is more prominent. In MAG welding process, the extended length of wire must be less than 10mm, torch oscillation amplitude, frequency, speed and dwell time with the right edge, concerted action, at any time adjust the torch angle to the surface of the edge of the weld fusion neat, beautiful shape, with ensure the quality of filling and cover the surface layer.
wire cable tray systems, cable tray prices, galvanized cable tray
2 welding methods and welding preparation
2.1 Soldering Methods
Material for the 0Cr18Ni9, pipe specifications for φ530mm × 11 mm, rendering the use of manual GTAW, gas mixture (CO2 + Ar) welding filling and capping, stand up to the level of fixed-position welding.
2.2 pre-welding
2.2.1 clean up the oil, rust and other dirt, the groove surface and within the repair 10mm milled around the metallic luster.
2.2.2 Check the water, electricity, gas and road is smooth, equipment and accessories should be in good condition.
2.2.3 according to size for assembly, tacking the use of rib plate (2:00, 7:00, 11:00 for the positioning block fixed), and points can be fixed within the groove, but must pay attention to positioning of welding quality.
2.2.4 tube filled with argon protection.
keywords:
2011年9月19日星期一
2011年9月9日星期五
New technologies in steel welding applications
Steel structure with light weight, short construction period, adaptable, attractive appearance, easy maintenance, etc., its application more widely. The development of steel and steel production are closely related. China has become the world's steel-producing countries, steel production in China in 2005 exceeded 300 million tons, of which up to 140 million steel production, energy, transportation, metallurgy, machinery, chemicals, electricity, construction and infrastructure areas such as steel construction industry has become a pillar of national economy.
From the 1980s, the Chinese construction steel has been an unprecedented development, construction steel in the national economy plays a very important position. Basis to evaluate the amount of steel in 2005, about 11.55 million tons of steel building steel structure, more than 836 million tons in 2002 38%%. At present, China's top steel structure, steel structure, bridge steel, light steel and steel for residential steel and other industrial and civil buildings, springing up all over the country. According to statistics, so far, China has built more than 60 high-rise high-rise steel buildings; large-span space steel structure in a variety of stadium, exhibition center, theater, terminal, hangars and some industrial plants in the application; steel bridge in the ascendant, since the 1990s, according to incomplete statistics, Yibin section of the Yangtze River to Shanghai, the number has reached more than 50 bridges stabling block, half of them are steel bridge, "many among the 'World class' bridge, showing Chinese contemporary bridge technology has reached world advanced level "; After several years of intensive research and development into China's steel housing has a new stage of development, a group of the Ministry of Construction of the demonstration project, pilot projects and key technology research projects have been built and achieved scientific research, in the "circular economy" "green building" policies under the guidance of future housing construction steel in China will flourish.
cable trays wire mesh, wire basket cable tray, outdoor cable tray
Welded steel construction features and difficulties
Looking at the current status of China's steel structure engineering and development trend, more and more with modern architectural style and architectural features of high technology, its main features are:
A novel and unique style, diverse architecture, the node structure is complicated, multi-form welded joints, component production and field installation of the welding technology more and more difficult. For example: National Stadium "Bird's Nest," a large number of steel works complex truss columns, the main truss, sub-structure node welding, weld criss-cross, the construction is very difficult.
2 building height is high, large span structures, seismic performance of welded steel design of the main requirements of high quality. Such as: frame beam-column connection weld, shear plate and column connection weld, beam web and column connections and column of the weld seam stitching, are the main parts of the structure, basically slope population penetration level seam, 100% ultrasonic testing, welding quality requirements are very high.
3 Use the varieties of steel specifications and more and more and more tend to use high-strength low-alloy structural steel and large thickness of the steel, iron and steel production process with increasing levels of, steel, austenitic stainless steel sheet has also been increasingly The more applications. Therefore, the required on-site pre-construction, the steel used for the delivery status, real-time for a new steel to the welding test, explore the science of welding parameters, welding technology to develop appropriate measures.
4 factory production and field installation link many factors, many different types of cross-operation, on-site installation difficult.
keywords:
From the 1980s, the Chinese construction steel has been an unprecedented development, construction steel in the national economy plays a very important position. Basis to evaluate the amount of steel in 2005, about 11.55 million tons of steel building steel structure, more than 836 million tons in 2002 38%%. At present, China's top steel structure, steel structure, bridge steel, light steel and steel for residential steel and other industrial and civil buildings, springing up all over the country. According to statistics, so far, China has built more than 60 high-rise high-rise steel buildings; large-span space steel structure in a variety of stadium, exhibition center, theater, terminal, hangars and some industrial plants in the application; steel bridge in the ascendant, since the 1990s, according to incomplete statistics, Yibin section of the Yangtze River to Shanghai, the number has reached more than 50 bridges stabling block, half of them are steel bridge, "many among the 'World class' bridge, showing Chinese contemporary bridge technology has reached world advanced level "; After several years of intensive research and development into China's steel housing has a new stage of development, a group of the Ministry of Construction of the demonstration project, pilot projects and key technology research projects have been built and achieved scientific research, in the "circular economy" "green building" policies under the guidance of future housing construction steel in China will flourish.
cable trays wire mesh, wire basket cable tray, outdoor cable tray
Welded steel construction features and difficulties
Looking at the current status of China's steel structure engineering and development trend, more and more with modern architectural style and architectural features of high technology, its main features are:
A novel and unique style, diverse architecture, the node structure is complicated, multi-form welded joints, component production and field installation of the welding technology more and more difficult. For example: National Stadium "Bird's Nest," a large number of steel works complex truss columns, the main truss, sub-structure node welding, weld criss-cross, the construction is very difficult.
2 building height is high, large span structures, seismic performance of welded steel design of the main requirements of high quality. Such as: frame beam-column connection weld, shear plate and column connection weld, beam web and column connections and column of the weld seam stitching, are the main parts of the structure, basically slope population penetration level seam, 100% ultrasonic testing, welding quality requirements are very high.
3 Use the varieties of steel specifications and more and more and more tend to use high-strength low-alloy structural steel and large thickness of the steel, iron and steel production process with increasing levels of, steel, austenitic stainless steel sheet has also been increasingly The more applications. Therefore, the required on-site pre-construction, the steel used for the delivery status, real-time for a new steel to the welding test, explore the science of welding parameters, welding technology to develop appropriate measures.
4 factory production and field installation link many factors, many different types of cross-operation, on-site installation difficult.
keywords:
2011年8月23日星期二
Localization of the robot welding technology has greatly improved
Recently, the Quality Supervision Bureau of Hebei Province, Tangshan Tangshan development around the development of fine steel, equipment manufacturing, chemical industry, "three pillars" of a new pattern of industrial development, establish and declare a "robot welding system technical conditions" for the local standards, Hebei Province.
wafer check valve, cast steel ball valves, industrial ball valves
With the accelerated process of industrialization, quality of construction machinery and precision requirements are also increasing. Robotic welding system in foreign countries using the welding structural components is very popular, but the domestic robot welding systems can make very few companies, and direct introduction of foreign systems and expensive sets, not only to spend a lot of foreign exchange, but also the production costs increased substantially. Tangshan Kaiyuan Co., Ltd. developed the robotic system is highly sophisticated robotic welding systems, narrow gap and all-position welding products, welding performance, high welding efficiency, high quality, high accuracy. The industry believes that China's heavy weight machine to adapt to the rapid development of industry needs, through the "robot welding system technology," The implementation of robotic welding systems to further improve our technical level, to improve the quality of welding and soldering, to adapt to complex, difficult the welding environment is important.
keywords:
wafer check valve, cast steel ball valves, industrial ball valves
With the accelerated process of industrialization, quality of construction machinery and precision requirements are also increasing. Robotic welding system in foreign countries using the welding structural components is very popular, but the domestic robot welding systems can make very few companies, and direct introduction of foreign systems and expensive sets, not only to spend a lot of foreign exchange, but also the production costs increased substantially. Tangshan Kaiyuan Co., Ltd. developed the robotic system is highly sophisticated robotic welding systems, narrow gap and all-position welding products, welding performance, high welding efficiency, high quality, high accuracy. The industry believes that China's heavy weight machine to adapt to the rapid development of industry needs, through the "robot welding system technology," The implementation of robotic welding systems to further improve our technical level, to improve the quality of welding and soldering, to adapt to complex, difficult the welding environment is important.
keywords:
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