The production process of spiral tube, the use of spiral tube

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.

Main process features:

a.During the forming process, the steel plate is uniformly deformed, the residual stress is small, and the surface is not scratched. The processed spiral steel pipe has greater flexibility in the size and specification range of diameter and wall thickness, especially in the production of high-grade thick-walled pipes, especially small- and medium-diameter thick-walled pipes, which can meet the incomparable advantages of other processes, which can meet more requirements of users in terms of spiral steel pipe specifications.

b.The advanced double-sided submerged arc welding process can be welded in the best position, and it is not easy to have defects such as misalignment, welding deviation and lack of penetration, and it is easy to control the welding quality.

c.100% quality inspection of steel pipes is carried out, so that the whole process of steel pipe production is under effective testing and monitoring, and the product quality is effectively guaranteed.

d.All the equipment of the whole production line has the function of networking with the computer data acquisition system to realize the real-time transmission of data, and the technical parameters in the production process are controlled by the first control room.

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.

1) The raw materials are strip coils, welding wires, fluxes. It must undergo strict physical and chemical inspection before being put into it.

2) The head and tail of the strip steel are butted, and the single wire or double wire submerged arc welding is adopted, and the automatic submerged arc welding is used to repair the steel pipe after being rolled into a steel pipe.

3) Before forming, the strip steel is leveled, trimmed, planed, cleaned and conveyed on the surface and bent.

4) The electric contact pressure gauge is used to control the pressure of the cylinder on both sides of the conveyor, which ensures the smooth conveying of the strip steel.

5) Adopt external control or internal control roll forming.

6) 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.

7) Both internal welding and external welding are carried out by Lincoln electric welding machine in the United States for single wire or double wire submerged arc welding, so as to obtain stable welding quality.

8) The welds after welding are inspected by the first continuous ultrasonic automatic injury instrument, which ensures 100% non-destructive testing coverage of spiral welds. If there is a defect, it will automatically alarm and spray the mark, so that the production workers can adjust the process parameters at any time and eliminate the defects in time.

9) Use an air plasma cutting machine to cut the steel pipe into a single one.

10) After cutting into a single steel pipe, each batch of steel pipes must be subject to a strict first inspection system to check the mechanical properties, chemical composition, fusion status, surface quality of the steel pipe and non-destructive testing to ensure that the pipe making process is qualified before it can be officially put into production.

11) The part marked by continuous acoustic wave flaw detection on the weld shall be reviewed by manual ultrasonic and X-ray ray, if there is indeed a defect, after repair, it will be inspected again until it is confirmed that the defect has been eliminated.

12) The pipe where the strip butt weld and the T-joint intersected with the spiral weld are all inspected by X-ray television or film.

13) Each steel pipe is tested by hydrostatic pressure, 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.

14) Pipe end machining, so that the perpendicularity of the end face, groove angle and blunt edge are accurately controlled.

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 spiral pipe manufacturer is Tianjin Daegu Zhuang spiral steel pipe manufacturer. Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made of low-carbon structural steel or low-alloy structural steel strip rolled into a pipe blank according to a certain spiral angle, and then welded the pipe seam, which can produce large-diameter steel pipes with narrower strip steel.

Precautions for spiral tube productionAttention to the process of oiling and marking after the inspection of Fuzhou spiral pipe to prevent corrosion, and then according to the customer's requirements for marking, the process of shearing and forming needs to pay attention to the steel plate along the outer edge of the spiral curl into a tube, welding and cutting need to pay attention to the Fuzhou spiral pipe using double-sided submerged arc welding technology for pre-welding.

The process of leveling and milling the edge needs to pay attention to the need to use the anvil press to level the original curled steel plate, and then mill the two edges of the steel plate through the milling machine to double-sided milling, so that it can achieve the required plate width, plate edge parallelism and groove shape.

The spiral tube manufacturer isHebei Golden Lock Spiral Steel Pipe Manufacturing Co., Ltd. The main stainless steel spiral pipe, stainless steel gas pumping spiral pipe, spiral steel pipe, spiral pipe is one of the Hebei spiral steel pipe factories, the spiral pipe factory specializes in the production of large-diameter spiral seam submerged arc welded steel pipes, the products are widely used in water engineering, petrochemical industry, chemical industry, urban construction, is one of the 20 key products developed in China.

Spiral tube features:The steel pipe and plastic pipe with double-layer anti-corrosion treatment by galvanizing and baking paint are compounded by special processes such as diameter reduction and bonding, with high strength, system working pressure, cold water pipe working temperature of 0 degrees Celsius +55 degrees Celsius, hot water pipe working temperature of 0 degrees Celsius to +75 degrees Celsius, and linear expansion coefficient of degrees Celsius.

Clean and non-toxic, safe and hygienic, all performance indicators have reached the requirements of the "Drinking Water Transmission and Distribution Equipment and Protection Data Hygiene Evaluation Standards", the inner wall is smooth, no rust, no scaling, no loss of diameter, the selection of thread connection, groove pipe fittings connection, flange connection, pipe fittings inside and outside the surface enamel treatment, reliable device, convenient protection.

Cangzhou Spiral Steel Pipe Factory is the largest and most professional large-scale enterprise producing spiral steel pipes in North China. The company is especially good at special materials, special models of large-diameter thick-walled steel pipes, the existing eight spiral submerged arc welded pipe production lines, the use of the United States Lincoln automatic welding machine, the leading product 219-3000x5-30mm spiral steel pipe.

Company Profile

Cangzhou spiral steel pipe responsibility **** The company covers an area of 420,000 square meters, with total assets of 1.5 billion yuan, strong technical force, production technology, testing equipment, can use SY T5037-2000, GB standard and APISPEC5L standard to produce 219-3000mmX5-30mm, Q235, L245, X42-X70 steel grade different wall thickness of Wuzhou brand spiral welded pipe.

In 2005, our company invested 60 million yuan to add two new longitudinal welded pipe production lines, which can produce 114-1820mm steel pipe products, which are widely used in long-distance transportation pipes such as oil, natural gas, chemical industry, electric power, heat and water sources.

The company can undertake single-layer and double-layer fused epoxy powder, double-layer polyethylene, and three-layer polyethylene, double-layer polypropylene and three-layer polypropylene, epoxy coal asphalt anti-corrosion coating and other pipeline external anti-corrosion projects and IPN8710 polymer anti-corrosion coating anti-corrosion, cement mortar pipeline inner wall anti-corrosion and other pipeline anti-corrosion structure pipeline anti-corrosion projects.