LSAW Steel Pipe

　　Electric welding machine, vibrator and other electrical equipment should be placed in dry wood once they are used among construction like building a house. Then here is the question: how do we determine the thickness of scaffolding plank for safety factor? 　　We shall discuss this question from lots of aspects, and scaffolding plank’s function would be an important or main one. Taking outside scaffolding for example, in addition to wood springboard, we can also use bamboo scaffolding plank, steel one, or even bamboo rafts and so on. At this time, if you inquire us for advice, hunanworld shall say that adopting high quality scaffolding plank would be good, and also recommends customers according to engineering’s situation as well as price factor. Meanwhile, if it is used for protection, such as the protection of the roof of the processing shed, then a layer like 5cm thick wooden springboard is generally required. 　　Every kind of scaffolding plank with different raw materials would ...

　　1. In agricultural engineering, spiral welded pipe also plays a certain role. Irrigation pipes, deep well pipes, drain pipes, etc., help farmers uncles save a lot of effort. 　　2. In the process of transporting petroleum, spiral welded pipe is used as a conveying pipe. 　　3. The spiral steel pipe application industry for sewage discharge is used in coal mines, power plants, sewage disposal, fire protection, petroleum, municipal engineering, chemical industry, and highway products. 　　4. In the city establishment, spiral welded steel pipes are used for high-rise construction of water supply, heating network heating, water supply engineering, gas transportation, underground water transportation, etc., and have made many contributions to the municipal establishment. 　　5. In the coal mine project, the spiral welded steel pipe mainly serves as the pipe network for underground coal supply and drainage, underground shotcrete, positive and negative pressure ventilation, pumping, fire s...

　　In order to improve the hardness of the seamless steel pipe, it can be improved by the heat treatment process of the quenched seamless steel pipe. After the seamless steel pipe is processed, in order to make the performance of the seamless steel pipe better, it needs to be cooled, and the quenching process cooling method mainly There are five types: 　　1. Single-liquid quenching method for seamless steel pipe. Heating seamless steel tubes or parts to austenitizing and then quenching them into water, oil or other cooling medium, and cooling them for a certain period of time (cooling to a region below the pearlite-type transition temperature or martensite transformation temperature) . Since the seamless steel pipe cooling process is completed in a single cooling medium, it is called a single liquid quenching method. 　　2. Seamless steel pipe two-liquid quenching method. The quenching and cooling process of the seamless steel tube is carried out in two cooling mediums (most commonly w...

　　310S stainless steel: a kind of high-alloy stainless steel . Compared with other types of stainless steel, the 310S base is austenitic chrome-nickel stainless steel, which has a higher proportion of chromium and nickel, so it is more resistant to high temperature and oxidation. Moreover, it can work normally in the environment of 1200 °C, and is more suitable for making furnace components. Considering its outstanding resistance to oxidation, corrosion, acid and alkali, and high temperature resistance, the current application range of 310S stainless steel has been extended to steam turbines. , aerospace, petrochemical, military and other fields. 　　What kind of concept is 1200 °C? To give a simple example: high temperature lava spilled from volcanoes or ground cracks, the temperature is only between 700 ° C ~ 1200 ° C, in other words, 310S stainless steel has enough conditions to retreat in the lava. 　　Such outstanding high-temperature performance makes people see the potential val...

　　Introduction of 304 stainless steel: 　　 304 stainless steel is the most common steel grade. As a kind of widely used steel, stainless steel pipe has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; good hot workability such as stamping and bending, no heat treatment hardening phenomenon ( Non-magnetic, the temperature is -196 ° C ~ 800 ° C). 　　Scope of application 　　Household items (tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs) 　　Auto parts (windshield wipers, mufflers, molded products) 　　Medical equipment, building materials, chemistry, food industry, agriculture, ship parts. 　　Introduction of 316 stainless steel: 　　Performance introduction 　　Due to the addition of molybdenum, 316 stainless steel has excellent corrosion resistance, atmospheric corrosion resistance and high temperature strength, and can be used under severe conditions; it has excellent work hardening property (non-magnetic). ...

　　Welded steel pipes are steel pipes made by bending and forming steel plates or steel strips. The production process of welded steel pipe is simple, the production efficiency is high, the types are standard, and the equipment is less invested, but the general strength is lower than that of seamless steel pipe . Since the 20th century, with the rapid development of high-quality strip continuous rolling and the advancement of welding and inspection skills, the quality of welds has been continuously improved, the types of welded steel pipes have become more and more standard, and more and more areas have replaced seamless Steel Pipe. Welded steel pipes are divided into straight welded pipes and spiral welded pipes by way of welds. Straight seam welded pipe production process is simple, high production efficiency, low cost, and faster development. The strength of the spiral welded pipe is generally higher than that of the straight welded pipe. It is possible to produce a welded pipe with ...

　　Flat weld flanges are flanges that are welded directly to equipment or piping by fillet welds. The structure is simple and the processing is convenient. The force characteristics are between the integral flange and the looper flange. The flat weld flange is divided into a plate type flat weld flange and a neck flat weld. The flat weld flange has low cost and short production cycle, which is the most commonly used. A flange type that is widely used in various fluid lines. 　　Flat welding flange has a beautiful shape and a smooth and smooth appearance. It is mainly used for the connection of carbon steel pipes , and its nominal pressure does not exceed 2.5 MPa. 　　Flat welding flange is resistant to acid and alkali, anti-corrosion, and strong in texture. It is made of i-oxygen furnace, and the whole forging or forging product is forged and formed by high-precision CNC lathe turning and CNC rocker drilling. 　　The joint method of the flat welding flange includes single-sided welding ...

　　Basic knowledge 　　A106b cold drawn round steel is a high quality low carbon carbon steel , cold extruded, carburized and hardened steel. 　　Cold drawn round steel is extremely versatile, and round steel is often used for machining raw materials and processing into mechanical parts and accessories. 　　Chemical composition (% by mass) 　　C0.17-0.25, Si0.17-0.37, Mn0.35-0.65, P≤0.035, S≤0.035, Ni≤0.30, Cr≤0.15, Cu≤0.25 　　Supply status and hardness 　　Bright surface, hardness ≤ 156HBS 　　characteristic 　　The steel has low strength and good toughness, plasticity and weldability. The tensile strength is 355-500 MPa and the elongation is ≥24%. 　　Normalizing can promote the spheroidization of the steel, refine the large block of pro-eutectoid ferrite, and improve the cutting performance of less than 160HBS blanks. 　　Processing technology and specifications 　　Routing 　　Blanking - Forging Die - Annealing - Mechanical Roughing - Cold Extrusion - Recrystallization Annealing - ...

　　The inspection of seamless steel pipes generally includes: inspection of geometrical dimensions and surface quality; chemical composition, mechanical properties, process performance, inspection of high and low microstructures; non-destructive testing; some special performance inspections and length measurement. 　　(1) Geometrical dimension inspection of seamless steel pipe: the outer diameter, wall thickness and bending degree and length of seamless steel pipe can be inspected on the inspection table by external caliper, micrometer and bending degree ruler and length tape measure. 　　For the outer diameter, wall thickness and length, automatic size detection devices (such as automatic diameter measurement, thickness measurement, length measuring device) can also be used for continuous detection. The seamless steel pipe production plant put into operation in the late 1980s generally has an online automatic diameter measuring and thickness measuring device, and a length measuring an...

　　Ferrous metals 　　It refers to the alloy of iron and iron. Such as steel, pig iron, ferroalloy, cast iron and so on. Both steel and pig iron are iron-based alloys with carbon as the main additive element, collectively referred to as iron-carbon alloys. 　　Pig iron is a product obtained by smelting iron ore into a blast furnace and is mainly used for steel making and casting. 　　The cast pig iron is smelted in a molten iron furnace to obtain cast iron (liquid, iron-carbon alloy containing more than 2.11% carbon), and the liquid cast iron is cast into a casting, and the cast iron is called a cast iron piece. 　　Ferroalloy is an alloy composed of iron and elements such as silicon, manganese, chromium and titanium. Iron alloy is one of the raw materials for steel making. It is used as a deoxidizer and alloying element additive for steel during steel making. 　　An iron-carbon alloy containing less than 2.11% of carbon is called steel, and the pig iron for steelmaking is placed in a s...