There are a wide variety of steel pipes in the market which have different manufacturing processes as well. The production and use of steel pipes date back to the early 19th century. The main material of the pipe is steel. It is a mixture of iron alloys and other metals such as aluminum, manganese, titanium, tungsten, and other alloys. Protection against sewage, gas, and even electric lines is used. Some notes about Steel pipe You know, the higher the quality of the steel pipe, the greater the thickness of the pipe wall. Pipes used in gas pipes must be black or carbon steel.The outside of all steel pipes must be smooth and uniform.According to the production method, steel pipes are divided into two types: welded and seamless. Raw materials manufactured in welded joints and without joints must be manufactured by one of the following methods: open furnace, electric furnace and oxygen shisha furnace. Steel pipes are divided into three methods according to compressive strength: weighing, planning and coding. These types of pipes must meet standards for construction, materials, dimensions, weight, testing and tolerances, including ISIRI, IGS, IPS, API, ASTM, AGA, MSS-SP and DIN. Steel pipe size described in NPS: nominal pipe diameter, ID; tube inner diameter, outer diameter; pipe outer diameter, SCH; Class, L is the length of the steel pipe, and T is the wall thickness of the steel pipe.
Types of steel pipes by production methodAccording to the production method, steel pipes in Mannheim are divided into seamless pipes and seam pipes. In this section, we briefly describe their production methods and applications. sealing tubeSeam pipe, this type of steel pipe is also known as welded pipe, in which a thin sheet coil is cut according to the thickness and size considering the production pipe, and after passing through rollers, it is rounded and the produced seam is welded. For example, with this method, one of the pipes that is produced is the welding seam of galvanized pipes. After production, the pipes are immersed in metal tanks and melted, so that the surface of the pipes is corrosion-resistant and rust-free. more Maniman seamless steel pipeThis type of pipe is scientifically known as a seamless pipe, that is, a seamless pipe, so the Mannesmann pipe or seamless pipe is called a steel pipe and does not use the usual metal welding methods at various stages of its production. .Mannheim tubes or in other words battery tubes are extruded by special dies. steel fittingsOne of the most used items in plumbing systems is their connections. Steel pipe joints are also used to connect pipes in the process of transporting fluids, split pipe routes, change routes, and resize pipes to smaller or larger pipes to continue the pipe route. At the same time, one type of steel pipe connection is to use tooth profiles, which are produced according to different standards. The main material and gender of these connections are made of steel or cast iron. This accessory is manufactured to ISO standards and is available in sizes up to 6 inches. All types of steel partsBushing: A bushing is used to connect two pipes togetherPlain sleeve: This sleeve is used to join pipes of the same diameter
Adapter bushings: Adapter bushings are used to connect pipe plugs of different diametersScrew-in bushing: It is another type of bushing that is internally threaded on one side and externally threaded on the other. Elbow: Elbow is used when the direction and route of a pipe needs to be changed. Knees come in different sizes and types, such as 90-degree knees, 45-degree knees, 90-degree flat knees, and 45-degree flat knees. It is good to know that the difference between a normal knee and a flat knee is the ribs. That is, one side of the rib is outwards. Tee: When the piping route needs to bifurcate, there are three-sided internal gear tee, 90-degree or right-angle tee, angle tee, conversion tee and tee. 45 degree production and sales. Pipe nut: A pipe nut is a removable connection that is used when we want to connect one end of a pipe to another device, such as: water tank, heater, water heater, etc.The main advantages of steel pipes
- Steel pipes can be used in water, oil, gas, petrochemical, automotive, aerospace, shipbuilding, mining, electrical and other industries.
- Steel pipes have high temperature and pressure resistance.
- Suitable for oil well walls, bridge industry, towers and buildings for long posts, fences and sofas, traffic and tunnel construction.
- Can be used as a gas pipeline for large industrial and household consumption
- Used at extremely low or extremely high temperatures using specially designed steel pipes
- Galvanized and coated pipes resist corrosion and rust
- Can be used in heat exchangers and steam condensers as well as radiant heating systems
- Possibility to manufacture steel pipes of different diameters and thicknesses - seamless and seamless
pipe manufacturing process
Metal pipes or steel pipes are used in many different industries and large-scale projects, based on different alloys to transport liquids, and they also have different production lines. Metal pipes are a strong, rigid type of pipe with a low coefficient of thermal expansion. When planning a new build or starting a plumbing project, you need to evaluate the different types of plumbing that will be used for the job. Metal pipes for the Iranian market offer three types of manisman pipes (seamless), folded black pipes and galvanized pipes. What is metal pipe (steel pipe)? The metal tube is cylindrical, open on both sides and hollow. These types of pipes are typically used mostly in a variety of industries and projects. Metal pipes can even be used in nuclear and nuclear power plants and oil refineries due to their high pressure and heat resistance. This type of pipe is based on ferrous alloys. Metal pipes themselves are divided into two categories: ferrous metal pipes and non-ferrous metal pipes. The fact that metal pipes are made of an important element called iron distinguishes it from non-ferrous pipes. advantage:
- High resistance: These pipes have high strength against shock, vibration and pressure during transport or installation and use.
- High temperature resistance: These pipes have good resistance to high temperature water. That is why they are widely used as water pipes.
- Low Coefficient of Longitudinal Expansion: This means that when the water temperature inside these types of pipes changes, their length changes very little and does not cause expansion and contraction problems.
- 100% impermeability: The possibility of light and oxygen penetration is almost zero. Therefore, it is impossible to grow algae in it, which is only possible when there is light.
- Fireproof: These pipes will not ignite and will not divert fire due to their high melting point. Therefore, they are used in industry as gas pipelines
Disadvantages:
- Internal and external corrosion: Oxygen and salt in water and soil can cause corrosion and ultimately shorten the life of these pipes.
- Low flexibility: Due to its high strength and low flexibility, this type of pipe is generally formed by connecting pieces.
- High thermal conductivity: A lot of energy is wasted from the walls of these pipes.
- Sedimentation: Aqueous dissolved substances are easily absorbed by the walls of these pipes and cause deposits. Solvent absorption reduces life, pressure drop and water flow.
- Heavy weight: The heavy weight of these pipes leads to shipping and installation problems.
- Installation Issues: Heavy weight and lack of flexibility were the issues we faced during installation.
- Short lifespan: These pipes typically have a lifespan of between 10 and 12 years, and they often rot and burst, which can also cause damage. Also, over time, the color and taste of the water can change, requiring us to replace the plumbing.
Use of galvanized pipeOne of the most used and common pipes in the industry is galvanized pipes. Applications for this pipeline includesupply of water or gasGreenhouse water supply system (greenhouse plumbing) As fence posts and fences in open environmentsat the treatment plantpower cable telecommunication mastThe difference between cold-galvanized pipe and hot-dip galvanized pipeGalvanized steel pipes are produced in two ways: hot and cold: Hot steel pipe:In this method, galvanized pipes are produced by dipping the steel pipe in a molten bath. Then they coated it to increase its resistance and extend its life. The bottom of the galvanized steel pipe is placed in the plating solution to make a corrosion-resistant iron-zinc alloy pipe. Application of hot-dip galvanized pipe:Agricultural machinery, oil, mining and other industries
- Construction
- The machine and car industry
- Motorways, bridges, electricity...
Cold rolled steel pipe: The galvanized coating in this pipe covers a small surface of the metal and is easy to remove. Therefore, its resistance is lower than that of hot-dip galvanized pipe, but the price is cheaper than that of hot-dip galvanized pipe. In general, these pipes differ in resistance, manufacturing method, adhesion, galvanized coating thickness, surface smoothness and price of these pipes. What is black steel pipe? Black steel pipe is a non-galvanized steel pipe with high resistance. These pipes are called black pipes because they have scales on the surface and the coating is made of iron oxide. These pipes are used where galvanized steel is not required. Black steel pipes are connected with elbows and pipe threads. In larger diameter pipes, welds are used instead of threads. These pipes are cut by heavy-duty pipe cutters, cutting dies or hack saws. Application of black steel pipe: Due to the high strength of these pipes, it is ideal for transporting water and natural gas, protecting pipes for electrical lines, and supplying steam and high-pressure air in rural and urban areas. The oil and gas industry uses black steel pipes to transport large quantities of oil and gas to remote locations.Other uses for black pipes include gas distribution inside and outside the home, water wells, and sewage systems.Black steel pipes are never used to transport drinking water. How to clean the black tube:To clean black pipes, you can use toilet paper, washing-up liquid, cleaning pads, newspaper, and emery cloths. To clean black pipes, always be aware that the black part is a coating that does not penetrate the metal of your device, so it is important not to damage this trim and protective layer. It should be noted that soap or powder detergents, baking soda, and abrasive soaps should not be used to clean pipes. What is the difference between black pipe and galvanized pipe?Different corrosion resistance:Galvanized pipe has a very low chance of rusting, but black pipe is a thin coating that only provides rough protection, so it will rust outdoors. Various fees:Using black pipe is more economical than galvanized pipe because zinc is used in a galvanized pipe.Different covers:Black pipes are made of steel, but galvanized pipes are coated with zinc.
Different programs:Black pipe is best used for gas pipes, not water pipes, because it is prone to rust, while galvanized pipes cannot be used for gas pipes, and are best used for water pipes. Advantages of black pipe:
- Can be used in engine rooms and heating ducts
- High precision, uniform wall thickness, high brightness of inner and outer surfaces
- light
- Corrosion resistance, acid, alkali, salt resistance
- Possibility to produce large diameters and thicknesses
- Atmospheric corrosion resistance
- High temperature resistance
- Anti-fatigue
- with mechanical properties
- Economical compared to other pipelines
- impact resistance
- its connections are abundant
- Its sealed form resists the penetration of sunlight
Why use black steel pipes for gas pipelines? As previously mentioned, black steel pipes are used in many parts of the country as gas pipes in natural gas pipes. These pipes are made for long, continuous pipes. According to research, this type of pipe is more popular because it is light, coiled without corrosion, and can be installed easily by hot melt or mechanical connection. Other types of pipe are usually made by forming a long sheet of metal. These plates are bent to the desired length and create a long seam for the welded pipe. With new materials on the market and new technologies for transporting hazardous materials such as natural gas, some jurisdictions have rewritten the rules to allow alternative transportation systems.