Spiral steel pipe advantages and storage introduction

Spiral steel pipe advantages and storage introduction

Spiral steel pipe,also known as spiral welded pipe,is a steel pipe made by coiled and welded steel strips.Because of its unique production process and excellent performance,spiral steel pipe has been widely used in construction,Bridges,highways,oil and gas transmission pipelines,water supply and drainage pipelines,heat pipelines,steel structures and other fields.This paper will introduce the advantages of spiral steel pipe and its storage method in detail,in order to provide a valuable reference for relevant practitioners.

First,the advantages of spiral steel pipe

1.Easy to adjust and a variety of caliber production

A major advantage of spiral steel pipes is the flexibility of their production.By changing the forming Angle,steel pipes of various calibers can be produced using strips of the same width.The convenience of this adjustment makes the spiral steel pipe have high flexibility in the production process and can meet the needs of different customers.

2.The length of the ruler is unlimited

Because it is continuous bending forming,there is no limit to the length of the spiral steel pipe,and the length can be customized according to actual needs.This flexibility not only reduces material waste,but also improves construction efficiency,especially in large engineering projects,which is particularly important.

3.Uniform distribution of welds,high processing accuracy

The spiral shape of the weld of the spiral steel pipe is evenly distributed on the whole steel pipe circle,which makes its processing precision is high and the strength is strong.The uniform distribution of welds also reduces stress concentration and improves the compression resistance and service life of the steel pipe.

4.Suitable for small batch and multi-variety production

The production process of spiral steel pipe allows it to change specifications easily and is suitable for small batch and multi-variety production mode.This flexibility enables the spiral steel pipe to meet the different needs of different customers and improve the market competitiveness.

5.You're stressed

The weld of the spiral steel pipe is longer than that of the straight seam pipe of the same specification,and the spiral steel pipe can withstand greater pressure under the same thickness.This feature gives it a significant advantage in areas such as high-pressure transmission pipelines and pressure vessels.

6.Corrosion resistance

Spiral steel pipe can be anticorrosive treatment according to needs,such as galvanized,coated plastic,etc.,to improve its corrosion resistance.In harsh environments,the spiral steel pipe with anti-corrosion treatment can maintain good service condition and extend service life.

7.Good welding quality

The welding process of spiral steel pipe is continuous and highly automated,which can ensure the quality of the weld.This high quality welding reduces the possibility of missed and false welding and improves the overall quality of the steel pipe.

8.Cost effective

Compared with seamless steel pipes,spiral steel pipes have lower production costs and can meet the needs of most projects.This high cost performance makes spiral steel pipe highly competitive in the market and widely used in various infrastructure construction projects.

9.Easy to transport and install

The spiral steel pipe can be customized to the required length and is relatively light,which is easy to transport and install on site.This feature makes the spiral steel pipe has high practicability in the construction site and improves the construction efficiency.

10.Widely used

Spiral steel pipe is widely used in oil,natural gas transmission pipeline,water supply and drainage pipeline,heat pipeline,bridge piling,steel structure and other fields.Its excellent performance and affordable price make it an indispensable building material in industrial construction and infrastructure projects.

Second,the production process of spiral steel pipe

The production process of spiral steel pipe mainly includes the following steps:

1.Prepare raw materials

The raw materials of spiral steel pipe are mainly strip steel coil,welding wire and flux.These raw materials are subjected to strict physical and chemical inspection before being put into production to ensure that their quality meets production requirements.

2.Strip crimping and welding

After butt docking,single wire or double wire submerged arc welding is adopted.After being rolled into the steel pipe,automatic submerged arc welding is used to repair welding to ensure the continuity and quality of the weld.

3.Molding treatment

Before forming,the strip needs to be levelled,trimmed,planed,surface cleaned and transported and treated with curved edges.These processing steps help to improve the flatness and quality of the strip,providing a good foundation for subsequent molding and welding.

4.Molding and welding control

The electric contact pressure gauge is used to control the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transmission of the strip.During the forming process,external control or internal control roll molding is adopted,and the weld gap control device is used to ensure that the weld gap meets the welding requirements.Both internal welding and external welding are performed by single wire or double wire submerged arc welding with Lincoln welding machine in the United States to obtain stable welding specifications.

5.Weld inspection and cutting

The welded seam is inspected by on-line continuous ultrasonic automatic damage instrument to ensure 100%non-destructive testing coverage of spiral welds.If there is a defect,the automatic alarm and spray mark,the production workers at any time to adjust the process parameters,timely elimination of defects.Air plasma cutting machine is used to cut the steel pipe into a single piece for subsequent inspection and packaging.

6.Quality inspection

Each batch of steel pipe head three to carry out a strict first inspection system,check the mechanical properties of the weld,chemical composition,fusion status,surface quality of the steel pipe and through non-destructive testing.After ensuring that the pipe making process is qualified,it can be formally put into production.The part of the weld with continuous acoustic detection mark is reviewed by manual ultrasonic and X-ray,and if there is a defect,it is repaired and non-destructive inspection is carried out again until it is confirmed that the defect has been eliminated.

7.Special inspection and testing

The butt weld of the strip steel and the pipe where the T-joint intersecting the spiral weld are located are all inspected by X-ray television or film.Each steel pipe has been tested by hydrostatic pressure,and the pressure and time are strictly controlled by the microcomputer testing device of steel pipe water pressure.The test parameters are automatically printed and recorded to ensure the quality and safety of the steel pipe.

Third,the storage method of spiral steel pipe

In order to ensure the quality of the spiral steel pipe and extend the service life,its storage method needs to pay attention to the following aspects:

1.Clean and dry

The site or warehouse for storing spiral steel pipes should be selected in a clean and unobstructed place,away from factories and mines that produce harmful gases or dust.The site should be cleared of weeds and all debris to keep the steel clean.

2.Good ventilation

Both indoor warehouses and open-air sheds should have good ventilation to reduce the risk of moisture and corrosion.Good ventilation helps keep the steel dry and clean,extending its service life.

3.Moisture and sun protection

Avoid direct sunlight and rain soaking,especially for pipes such as polyurethane foam insulation spiral steel pipes that are susceptible to temperature,the temperature and humidity of the storage environment should be strictly controlled.Moisture protection and sun protection help prevent corrosion and deformation of the steel.

4.Sort and store

Different varieties of steel should be stacked separately to prevent confusion and contact corrosion.In the warehouse,the spiral steel pipe shall not be stacked together with acid,alkali,salt,cement and other materials that are corrosive to steel.Separate storage helps keep the steel clean and intact.

5.Mat up and mat down

For small and medium-sized section steel,wire rod,steel bar,medium diameter steel pipe,etc.,should be stored in a well-ventilated material shed,and do the mat.That is,the top is covered with waterproof cloth,and the bottom is laid with cushion wood to prevent moisture and corrosion.This helps protect the steel from the harsh environment.

6.Stack properly

When stacking spiral steel pipes,they should be classified and stored according to specifications and lengths to avoid friction and damage caused by chaotic stacking.At the same time,it is necessary to leave a certain channel for easy handling and management.Proper stacking helps to keep the steel neat and orderly.

7.Warehouse selection

The warehouse should be selected according to geographical conditions,generally using ordinary closed warehouse,that is,a warehouse with a roof and walls,tight doors and Windows,and a ventilation device.Such warehouses help to maintain a suitable storage environment and prevent steel from moisture and corrosion.

8.Environmental control

The warehouse requires attention to ventilation on sunny days,attention to close moisture on rainy days,and often maintain a suitable storage environment.For special pipes such as polyurethane foam insulation spiral steel pipes,it is also necessary to control the temperature and humidity of the storage site within a reasonable range.Environmental controls help maintain steel stability and extend its service life.

9.Check drainage facilities

Check the drainage facilities in the warehouse regularly to ensure that water is discharged in time to prevent damage to the pipes caused by wet environment.Unimpeded drainage helps keep the warehouse dry and clean.

10.Check anti-corrosion measures

Regularly check whether the anti-corrosion coating or anti-rust treatment of the spiral steel pipe is intact,if there is damage,it should be repaired in time.Inspection and repair of anti-corrosion measures help to maintain the corrosion resistance of steel and extend the service life.

11.Security management

Strengthen the safety management of the warehouse,set up fire prevention facilities to prevent accidental fire.At the same time,do a good job of anti-theft,loss prevention and other work to ensure the safe storage of the pipe.Safety management measures help protect steel from accidental loss and damage.

4.Conclusion

With its unique production process and excellent performance,spiral steel pipe has been widely used in construction,Bridges,highways,oil,natural gas transmission pipelines,water supply and drainage pipelines,heat pipelines,steel structures and other fields.Through scientific and reasonable storage methods and management measures,the quality of spiral steel pipes can be ensured and the service life can be extended.It is hoped that the introduction of this article can provide valuable reference for relevant practitioners and promote the sustainable and healthy development of the spiral steel pipe industry.