Spiral pipe is one of the most widely used types of pipes, which has different applications in different industries. These steel pipes are produced spirally from steel sheets with different thicknesses, and due to its unique features, this steel pipe is also used in the gas and oil industries.
Technical Specifications of Spiral Tube
These steel pipes are hot-rolled and spirally produced in galvanized material (galvanized spiral pipe) and sometimes aluminum. If the spiral pipes are not produced from sheet steel, they are produced in fiberglass or flexible plastic and composite materials. Sometimes, according to the customer's request, the spiral pipe is made to order in steel, brass, copper, aluminum and stainless steel with vinyl coating. can be produced.
In addition to the material of the spiral tube, its length is also varied and arbitrary; But the most common length of this pipe is 20 feet and in Iran it is 6-12 meters so that it does not cause problems in transportation. In general, spiral pipe sizing is available in sizes from 5 to 120 inches. AWWA-C200 standard for water pipes, as well as API-5l or IPS-MPI190 or PLD III standard for pipes required for oil and gas industries. , are used.
These pipes are made in various sizes and thicknesses, and their inner and outer surfaces are coated with materials. It is covered with anti-corrosion such as liquid epoxy, three-layer polyethylene, Bitosyl, etc.
Spiral
The method of producing the spiral pipe is that after the steel sheet is smoothed with the help of a roller, its edges are cleaned of waste, and then the spiral pipe is produced in two different ways: one-stage and two-stage:
Single -stage
This method has three steps. In the first stage, the initial part of the steel sheets is welded together and smoothed around the edges. Then the edge of the sheet is bent to prevent the creation of unpressable protrusions.
In the sub-powder welding stage in the spiral tube, first the inner edge of the sheet and then the outer edge are welded by the sub-powder welding machine. After that, it's time to cut the pipe. The main point in this production method is its slowness due to the speed limitation of sub-powder welding.
Two -stage
This production method is also the same as the single-step method; With the difference that the sheet shaping is done by GMAW, that is, in the welding stage, the seam is done from inside and outside by several sub-powder welding machines. This difference has made the production efficiency higher and the speed of this method is four times that of the single-step method.
The benefits of spiral pipe
The spiral pipe has unique advantages and features compared to the welded pipe, which we will examine below:
No limitation in the length of the spiral pipe
High strength and resistance
Less use of flanges
Produced in different materials for different applications
Easier measurement of air flow
Purification More convenient
Less air leakage
High strength against fracture and cracking
Very low production cost compared to other welded pipes
Production of large diameter pipe up to 120 inches
High ductility
Spiral pipe application
Spiral pipe is used in various industries. The production process of these pipes has been implemented in various factories inside the country and various products have been launched. Due to various factors such as the uniformity of dimensions, the flexibility of the manufacturing process, special mechanical properties and economic issues, these pipes are widely used in the oil and gas industry. Avoid problems. In the oil and gas industry, these pipes have a very important competition with direct welding seam pipes, and with the increase in their quality in recent years, their use has increased and there is an upward trend in the whole world.
Other applications of these pipes in the system ventilation, dust removal and carbon monoxide discharge. Due to the good characteristics of these pipes, they are also used in high acceleration and high pressure air conditioning systems. Other uses of these pipes include their use in chemical industries, ruby layer, bridge, metal structures, heating industry, etc.
These pipes are used in public centers, clinics and hospitals, communities and Recreational places, office buildings and warehouses are used in the heating and air conditioning system. The following are among the most important applications of the spiral tube.