1.Introduction of spiral steel pipe
Spiral welded steel pipe refers to a steel pipe with seams on the surface, which is made of steel strip or steel plate as raw material, often warmly extruded, and welded by process. The spiral steel pipe feeds the strip into the welded pipe unit. After rolling by multiple rollers, the strip is gradually rolled up to form a circular tube blank with an opening gap. 3mm, and make both ends of the welding joint flush. The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe.Spiral welded steel pipe has lower cost and higher production efficiency than seamless steel pipe.
2.Technical characteristics of spiral steel pipe
1. During the forming process of the spiral steel pipe, the deformation of the steel plate is uniform, the residual stress is small, and the surface is not scratched.
2. The spiral steel pipe adopts the advanced double-sided submerged arc welding process, which can realize welding in the best position, and is not prone to defects such as misalignment, welding deviation and incomplete penetration, and it is easy to control the welding quality.
3. Carry out 100% quality inspection on steel pipes, so that the whole process of steel pipe production is under effective inspection and monitoring, which effectively guarantees product quality.
4. All equipment of the whole production line of spiral steel pipe has the function of networking with the computer data acquisition system to realize real-time data transmission, and the technical parameters in the production process are checked by the central control room.
3.Common size of spiral steel pipe
Diameter(mm) | Thickness of Wall(mm) | Length(m) |
219 | 5. 0-8. 0 | 6-12 |
245 | 5. 0-12. 0 | 6-12 |
273 | 5. 0-12. 0 | 6-12 |
325 | 5. 0-12.0 | 6-12 |
377 | 5. 0-12.0 | 6-12 |
426 | 5. 0-12.0 | 6-12 |
478 | 5. 0-12.0 | 6-12 |
529 | 6. 0-16. 0 | 6-12 |
630 | 6. 0-16. 0 | 6-12 |
720 | 6. 0-16. 0 | 6-12 |
820 | 6. 0-16. 0 | 6-12 |
920 | 6. 0-16. 0 | 6-12 |
1020 | 6. 0-16. 0 | 6-12 |
1120 | 8. 0-25. 0 | 6-12 |
1220 | 8. 0-25. 0 | 6-12 |
1320 | 8. 0-25. 0 | 6-12 |
1420 | 8. 0-25. 0 | 6-12 |
1520 | 8. 0-25. 0 | 6-12 |
1620 | 8. 0-25. 0 | 6-12 |
This table shows some common sizes of spiral steel pipes. Our company accepts customization, and can produce and supply spiral steel pipes of different sizes according to customer requirements.
4.Application of spiral steel pipe
Spiral steel pipes are mainly used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction, etc.
1. Spiral steel pipe is used for liquid transportation: water supply, drainage, sewage treatment engineering, mud transportation, marine water transportation.
2. Spiral steel pipe is used for gas transportation: gas, steam, liquefied petroleum gas.
3. Spiral steel pipe is used for structure: as piling pipe, for bridge; for wharf, road, building structure, marine piling pipe, etc.
5.The difference between spiral steel pipe and straight seam steel pipe
This picture shows the spiral steel pipe and the straight seam steel pipe. Because of their different welding methods, they appear in different shapes. According to the shape of the weld, it can be divided into spiral welded pipe and straight welded pipe.
The specific differences are as follows:
The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe. The production process of straight seam welded pipe is simple, the production efficiency is high, the cost is low, and the development is fast. Compared with the straight seam pipe of the same length, the length of the welded seam is increased by 30~100%, and the production speed is lower. Therefore, most of the welded pipes with smaller diameters use straight seam welding, and most of the welded pipes with large diameters use spiral welding.
6.Spiral steel pipe suppliers
HDT Tubing Co., Ltd (https://www.hdtsteel.com) is a large supplier of spiral welded pipes. We have advanced production equipment, strong technical strength and perfect after-sales service. The steel products we produce are of high quality and comply with international standards. The company has sufficient inventory and provides 24-hour online service. Customized purchases are welcome.
