What does a spiral tube do? What are the spiral tube manufacturers?

Spiral pipes are also known as spiral steel pipes or spiral welded pipes.

It is a low-carbon structural steel.

or low-alloy structural steel strip according to a certain helix.

The angle (called forming angle) is rolled into a tube blank and then welded to the pipe seam, which can produce large diameter steel pipes from narrower strip steel.

Spiral pipes are mainly used for oil and gas transmission pipelines, and their specifications are expressed by outer diameter * wall thickness. The spiral pipe is single-sided welded and double-sided welded, and the welded pipe should ensure the tensile strength of the hydraulic test and the weld.

and cold-formed performance in accordance with the regulations.

The common standards for spiral pipes are generally divided into: SY T5037-2018 (Ministry standard, also known as spiral seam submerged arc welded steel pipe for ordinary fluid transmission pipelines), GB national standard, also known as the first part of the technical conditions for the delivery of steel pipes for the oil and gas industry: A-grade steel pipes (GB B-grade steel pipes with strict requirements)), API-5L (American Petroleum Institute, also known as pipeline steel pipes; It is divided into two levels: PSL1 and PSL2), and SY T5040-92 (spiral seam submerged arc welded steel pipe for pile).

The commonly used spiral pipe materials in China are: Q235A, Q235B, Q345, L245, L290, X42, X52, X60, X70, X Cr Cr Cr19Ni Cr18Ni Cr18Ni11NB. **：

Spiral tubes.

Water transmission, heat supply, gas supply, piling, etc., can all be used.

Spiral pipe manufacturers include Hebei Middle East Pipeline Equipment, Cangzhou Xinyida Storage and Transportation, Cangzhou Hengtai Pipeline Technology, Cangzhou Yingli Pipeline, Cangzhou Hengtai Pipeline Technology.

Founded in 2018, Hebei Middle East Pipeline Equipment Co., Ltd. is a large-scale steel pipe enterprise specializing in the production, development and sales of anti-corrosion steel pipes, thermal insulation steel pipes, double-sided submerged arc spiral steel pipes, longitudinal seam (thermal expansion) welded pipes and oil casings, with several branches such as anti-corrosion and thermal insulation, special pipes, pipe fitting manufacturing, flange forging, etc.

Cangzhou Xinyida Storage and Transportation Co., Ltd. is a group company integrating the production of spiral steel pipes, sales of seamless steel pipes, longitudinal steel pipes, coils, strip steel, billets, iron ore and other professional properties, with an annual production of 450,000 tons of various types of spiral steel pipes; Sales of all kinds of seamless steel pipes, longitudinal seam steel pipes, coils, strip steel, billets, iron ore and other 200,000 tons.

Cangzhou Hengtai Pipeline Technology Co., Ltd. is one of the largest enterprises of steel pipes and pipe fittings. The company has a registered capital of 50 million yuan and is located in Zhenggang Park, Yanshan Economic Development Zone, Cangzhou City, Hebei Province, which is the "China Pipeline Equipment Manufacturing Base".

Cangzhou Yingli Pipeline, located in Yanshan, the "capital of pipe fittings - pipelines in China", is only 200 kilometers away from Tianjin Xingang, the main products are: seamless steel pipes, longitudinal welded pipes, spiral steel pipes, alloy steel pipes, stainless steel pipes, anti-corrosion steel pipes, steel pipe welded flanges, elbows, tees and other pipeline equipment.

Cangzhou Hengtai Pipeline Technology Co., Ltd. is one of the large-scale enterprises specializing in steel pipes and pipe fittings. The company has a registered capital of 50 million yuan, the company is adjacent to Huanghua Port in the east, Beijing and Tianjin in the north, Beijing-Shanghai Railway in the west, and Qilu in the south.

Spiral pipes are mainly used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction, and is one of the 20 key products developed in China. For liquid transportation: water supply, drainage, sewage treatment engineering, sludge transportation, marine water transportation.

For gas transportation: coal gas, steam, liquefied petroleum gas. For structural purposes:

as piling pipes and bridges; Pipes for wharves, roads, building structures, marine piling pipes, etc. 5mm*1mm—630mm*80mm.Seamless steel pipes for structures, seamless steel pipes for fluids, seamless steel pipes for hydraulics, seamless steel pipes for electric power, seamless steel pipes for oil transportation, seamless steel pipes for fertilizer equipment, seamless steel pipes for coal mines, stainless steel seamless steel pipes, seamless steel pipes for chemical industry, seamless steel pipes for textile machinery, automobiles; Water use seamless steel pipes, Wuxi precision seamless steel pipes, bright seamless steel pipes, seamless steel pipes for military medical treatment, seamless steel pipes for pipelines, seamless steel pipes for pillars.

At the same time, the company has a pipe pulling unit, which can produce seamless steel pipes with material 10, outer diameter of 18-127mm and wall thickness of 3-20mm. The coiling unit can produce steel pipes made of 20 and 16mn outer diameters of 400-1600mm and wall thickness of 20-60mm, which can be fixed to 12 meters, and is suitable for: transportation, pipelines, bridges, towers, rollers, engineering pillars, with high quality and low price.

Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often extruded at temperature, and welded by automatic double-wire double-sided submerged arc welding process. The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, misalignment amount and weld gap are strictly controlled. The part marked by continuous acoustic flaw detection on the weld is reviewed by manual ultrasonic and X-ray, and if there is a defect, it is repaired and then subjected to non-destructive inspection again until it is confirmed that the defect has been eliminated.

Each steel pipe is hydrostatic tested, and the pressure is radially sealed. The test pressure and time are strictly controlled by the steel pipe hydraulic microcomputer detection device. The test parameters are automatically printed.

Before forming, the strip is leveled, trimmed, planed, cleaned and bent on the surface.

Characteristics of spiral pipe: the production process of longitudinal welded pipe is simple, the production efficiency is high, the cost is low, and the development is fast.

The strength of spiral welded pipes is higher than that of longitudinal welded pipes, and it is possible to produce welded pipes with larger diameters from narrower blanks, and welded pipes with different diameters can also be produced from blanks of the same width. However, compared to the same length of straight seam pipe, the weld length is increased by 30 100%, and the production speed is lower. Therefore, most of the smaller-diameter welded pipes are welded longitudinally, while the larger-diameter welded pipes are mostly spiral welded.

The outer diameter of the spiral tube is about 30 nm, the inner diameter is about 10 nm, and the adjacent helix spacing is about 11 nm. The spiral tube is surrounded by 6 nucleosomes every 1 week, and the H1 histone is located on the inner surface of the spiral lumen, which plays an important role in maintaining the structure of the spiral tube. The 10 nm fibers composed of nucleosomes spiral to form 30 nm crude fibers, further compressing the DNA length by a factor of 6.

Spiral seam submerged arc welded pipe for pressure fluid transportation is mainly used for pipelines transporting oil and natural gas, and the steel pipe has strong pressure-bearing capacity and good plasticity, which is convenient for welding and processing. Spiral seam submerged arc welded steel pipe for general low-pressure fluid transportation is made by double-sided automatic submerged arc welding or single-sided welding method, and is used for general low-pressure fluid transportation such as water, gas, air and steam.

The cutting surface of the spiral air duct is generally circular, the manufacturing material density is high, there will be no water leakage and air leakage when used, the use range is wide, in line with the vast majority of production and life conditions, understanding the basic use of the spiral pipe can greatly improve the efficiency of production and life, and its daily use is as follows:

1. Exhaust ventilation.

This includes high-quality gas transmission and ventilation, which is more common. For example, the turbid gas in the workshop or production site is discharged and fresh and clean air is introduced, which requires the use of two spiral pipes with a larger radius and a wider pipe wall to work in both directions and at the same time. If the gas to be conveyed has water vapor, stainless steel is required.

2. Convey cold air.

The scene that needs to use this function is generally in large indoor places, such as shopping malls, hotel lobbies or libraries, etc., where the amount is relatively large and the ceiling air conditioning is required. When this kind of pipe sends cold air, it also needs to go through special processing, use insulation material to paste the spiral pipe, keep the gas warm, and use tin foil to wrap the outer ring, so that the spiral pipe looks more in line with our aesthetics.

3. Smoke and exhaust.

The pressure of the spiral pipe is required for the extraction and exhaust of the fume, because the fume gas has a certain adhesion and the gas density is also large, which not only requires high-quality manufacturing materials, but also needs a pipe wall with a larger diameter. Like hotels, restaurants, snack streets or your own kitchens, there will be a lot of oil smoke emitted every day.

4. Dust removal and discharge of dust particles.

Some production workshops will produce a lot of particle dust, at this time it is necessary to do a gas conversion with the outside air, spiral pipes generally can not meet such large work requirements, can be connected to large pipes to achieve its working effect.

The national standard spiral steel pipe is referred to as spiral steel pipe, spiral steel pipe.

Material classification: 16MN material spiral bent buried spinning steel finch reed pipe, Q345B spiral steel pipe, L245 spiral steel pipe, L360 spiral steel pipe, X40-X80 spiral steel pipe.

The specification table of spiral steel pipe is detailed as follows:

The spiral steel pipe is a spiral seam steel pipe made of strip coil as raw material, often extruded at temperature, and welded by automatic double-sided submerged arc welding process. The spiral steel pipe feeds the strip steel into the welded pipe unit, and after rolling through multiple rolls, the strip steel is gradually rolled up to form a round pipe blank with an open gap, and the amount of pressure of the extrusion roller is adjusted to control the weld gap at 1 3mm, and the two ends of the weld are flush.

Advantages of spiral steel pipes:

1.By simply changing the forming angle, it is possible to produce steel pipes of various diameters with strip of the same width, which can be easily adjusted.

2.Because it is continuously bent and formed, the length of the spiral tube is not limited, and the length can be arbitrarily determined.

3.The spiral shape of the weld is evenly distributed on the circumference of the entire spiral tube, so the dimensional accuracy of the spiral tube is high and the strength is also strong.

4.It is convenient to change the size, and is suitable for the production of small batches and various types of spiral tubes.

Can spiral pipes be used with -7 pipes?

Hello, you can use it. First: spiral polyurethane insulation steel pipe treatment method polyurethane prefabricated directly buried insulation pipe is a prefabricated pipe that is closely combined with the outer sheath of steel pipe, polyurethane rigid foam insulation layer and glass avant-garde reinforced plastic (i.e., glass air judgment steel).

Polyurethane insulation pipe has the excellent characteristics of light capacity, high strength, heat insulation, sound insulation, flame retardant, cold resistance, anti-corrosion, non-water absorption, simple and fast construction, etc., and has become an indispensable material for thermal insulation, waterproof plugging and sealing in industrial sectors such as construction, transportation, petroleum, chemical rubber pure industry, electric power, refrigerated bucket and so on. Polyurethane insulation pipes are used for various indoor and outdoor pipelines, central heating, refrigeration, oil transportation, steam transportation and other pipelines, as well as air conditioning pipelines, chemical, pharmaceutical and other industrial pipelines.