Spiral Welded Pipe
Your Professional Spiral Welded Pipe Supplier
Gnee Steel Group is a supply chain-integrated enterprise including steel plate, coil, profile, outdoor landscape design and processing. Products include: API 5L Line Pipe, Seamless Steel Pipe, Welded Steel Pipe, OCTG, Stainless Steel Pipe, Coated Steel Pipe, Galvanized Steel Pipe, Pipe Fittings.
Why Choose Us?
Rich Experience
Gnee Steel Group was founded in 2008, has 15 years of experience in steel manufacturing.
Wide Product Range
The company's main products include: stainless steel pipes, stainless steel plates, stainless steel pipe fittings, duplex stainless steel, nickel-based alloys, etc.
Broad Market
The company's products are exported to more than 70 countries around the world, with a total of more than 800 global cooperative enterprises, including 15 shipbuilding companies, 143 engineering project companies, and 23 boiler machinery manufacturers.
Quality Guaranteed
Gnee has a strict procurement and quality inspection team carefully selects high-quality raw materials; an advanced science and technology team improves production and reduces costs for customers; an excellent design and processing team strives for excellence.
Brief Introduction to Spiral Welded Pipe
The weld is welded under powder coating. This process is also known as Submerged Arc Welding (SAW). At the end of the spiral, a new spiral is welded to the back edge of the pipe, creating a cross seam. The pipe is cut to length and the ends are beveled if necessary.
What are Advantages of Spiral Welded Pipe？
Increased Productivity
Spiral welded pipe is produced by continuously welding spirals from strip material. The advantages of the process are increased productivity and lower costs. The spiral welded pipe process is continuous, meaning that longer pipe lengths can be produced than with other methods. Additionally, the spiral welding process is faster than other methods, which results in lower production costs.
Improved Quality
Spiral welded pipe also has improved quality due to the continuous nature of the welding process. This allows for better control of the weld bead, resulting in a stronger and more consistent weld. Additionally, the lack of starts and stops in the welding process reduces the risk of defects and increases the overall quality of the pipe.
Greater Flexibility
The spiral welded pipe process also provides greater design and material choice flexibility. The process can accommodate many materials, including carbon steel, stainless steel, and aluminium. The spiral welding process can also produce pipes with various diameters and wall thicknesses.
Increased Strength
Spiral welded pipe also has increased strength due to the continuous nature of the welding process. The welding process’s lack of starts and stops results in a stronger overall bond between the metal layers. The spiral welding process also creates less stress on the material, further increasing its strength.
Greater Versatility
The spiral welded pipe process is also versatile enough for various applications. Spiral welded pipes can be used for everything from transportation pipelines to structural applications such as buildings and bridges. Additionally, the spiral welded pipe can be customized to meet the specific needs of each application.
What are Features of Spiral Welded Pipe?
High Strength
Spiral welded pipes are welded from thin plates, with high weld quality, good strength and stiffness, and can withstand large forces and pressures, making them suitable for various construction projects.
Strong Corrosion Resistance
The spiral welded pipe adopts hot-dip galvanizing process, which has strong corrosion resistance and can be used in harsh environments for a long time, avoiding the problem that traditional steel pipes are easy to rust.
Convenient Construction
The spiral welded pipe is produced in a factory with precise manufacturing process. The length can be made to any size. It is easy and quick to install, which can save construction time and cost.
Long Life
Because the spiral welded pipe has excellent corrosion resistance and strength, it can withstand the erosion of wind and rain for a long time, and can generally be used continuously for more than 50 years.
Applications of Spiral Welded Pipe
Foundation and Structural Piling
Spiral welded pipes are ideal for creating the piling foundation of structures, such as bridges, ports, and piers. They are often found in marine areas, but can also be found in building structures. They are also often used as pile-driving pipes for various structures. This is because they are both highly weather, environmental, and stress-resistant.
Water Systems
Spiral welded pipes are also the common choice for water systems, particularly those with long lines and large diameters. This is because spiral pipes are more cost-efficient, compared to other common pipes such as HDPE pipes. As a result, they’re often used for water supply, drainage, sewage treatment systems, mud or slurry transport, and marine water transport. When properly coated and lined, spiral welded pipes can also be used for potable water lines.
Oil and Gas Systems
When coated with the right epoxy, a spiral welded pipe can also be used for oil and gas systems. Common uses include systems for gas and steam transportation, as well as liquefied petroleum systems.
Uncoiling
Upon receipt of the coil, it is placed on a horizontal uncoiler mandrel and fed into the straightener.
Flattening
The strip of coil is introduced into the flattener through a roll stand and the coil set is removed.
Joining of the Coil Ends
As the coil continues to move through the straightener, the leading and trailing edges of the strip are trimmed in preparation for butt welding – coil to coil.
Edge Milling
The edges of the coil are trimmed with carbide teeth to prepare for welding.
Pipe Spiraling
The strip of coil enters the three roll apparatus composed of lead, buttress and mandrel roll sets. At this stage, the coil starts to form the spiral shape that will then become pipe.
Pipe Welding
The welding system welds the pipe, first along the inside diameter and then along the outside diameter, using a submerged arc welding process.
Quality Control
Once the welding is complete, the finished pipe is visually inspected by Quality Control (QC) and, if required, Ultrasonic (UT) testing is performed to ensure the weld is defect-free.
Pipe Cut-Off
Once the pipe reaches the desired length, the cut-off machine is engaged. Traveling with the pipe, a plasma torch provides the cut-off of the finished pipe. Specific end props, such as bevel or square cut ends, can be requested to allow for simpler splicing in the field.
How Do You Maintain Spiral Welded Pipe?
Choose High-Quality Materials
First of all, choosing high-quality spiral welded steel pipe materials is the key to preventing rust. High-quality materials usually contain more alloying elements, such as chromium, nickel, etc., which can enhance the corrosion resistance of spiral welded pipes. When purchasing, you should choose qualified products that have undergone strict quality testing.
The Importance of Surface Treatment
Coating or plating the surface of spiral steel pipes is an effective way to prevent rust. Commonly used surface treatment methods include spray painting, galvanizing, plastic spraying, etc. These methods can form a protective film on the surface of the spiral steel pipe to block the intrusion of moisture and oxygen, thereby preventing rust.
Maintain a Dry Environment
Humid environment is one of the main factors causing rust of spiral steel pipes. Therefore, maintaining a dry environment is crucial to prevent spiral welded steel pipes from rusting. During use and storage, contact with water and moisture should be avoided, especially during transportation and installation, pay attention to waterproofing and moisture-proofing.
Regular Maintenance and Inspection
Regular inspection and maintenance of spiral steel pipes are also important measures to prevent rust. Dirt and impurities on the surface should be cleaned regularly and checked for cracks, rust, etc. Once an abnormality is discovered, immediate measures should be taken to repair and replace it.
Pay Attention to Installation Details
During installation, care should be taken to avoid contact between the welded steel pipe and other metal parts to prevent electrochemical corrosion. At the same time, attention should be paid to the installation sequence and operation methods to avoid damage to the spiral steel pipe during the installation process.
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GNEE Steel Group is China's professional one-stop supply chain enterprise for steel products.
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Its stainless steel pipe production technology has reached the world's average technical level. It has been recognized by dozens of project companies and has become a star enterprise in Asia.
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Frequently Asked Questions
Q: What are the differences between straight weld vs spiral weld pipes?
The main difference between the straight weld and spiral weld pipes lies in their manufacturing process.
Straight welded pipes are made by bending and forming a steel billet. Once the desired shape is made, this is then welded together down the length of the pipe. This process creates a straight, longitudinal seam down the very center of the pipe. Hence, its name. Spiral welded pipes, in contrast, are rolled from a steel billet to create a helical angle. The edges are welded together to create a pipe.
The manufacturing process of straight welded steel pipes is much simpler. They are typically made with high-frequency welding techniques, while spiral welded pipes are made using a submerged arc welding method.
Comparing the two, straight welded pipes are more efficient to manufacture, offering lower production costs but higher development speeds, compared to spiral weld methods.
Strength
When comparing the two types of steel pipe, spiral welded pipes have a certain advantage when it comes to pipe strength. This is because they are produced through submerged arc welding. This welding technique offers great quality and uniform welds and deeper weld penetration than other techniques.
Weld length
With spiral welded pipes, you can produce pipes of different diameters, even when using billets of the same width. You can also create spiral welded pipes with larger pipe diameters, even with narrower steel billets.
Comparing it with the same size of billet used to make a straight welded pipe, the weld length of a spiral welded pipe can be increased from 30% up to 100%. However, creating larger diameter spiral welded pipes can take much longer to produce.
Thus, small diameter pipes are typically made with straight welding methods. Larger diameter pipes are typically made through spiral welding.
Probability of weld defects
To make straight welded steel pipes — particularly those with longer lengths and larger diameters — T-welding techniques are used. This technique splits the length of the longitudinal weld into shorter sections and helps the pipe meet engineering requirements.
However, while this does help make the product viable, it does increase the risk of welding defects in the straight seam. Furthermore, the residual stress from welding using this technique tends to create a stress effect, which further increases the probability of defects, especially cracks.
In comparison, spiral welded pipes made with the submerged arc welding process create welds with an arc ignition point and arc extinguishing point. This creates a more stable weld with less risk of welding defects, particularly at the arc extinguishing point.
Main applications
Because of their many differences in terms of strength, construction, and length, there will be applications where one kind of pipe performs better than the other.
Generally, straight welded pipes are used for lighter-weight applications due to their less robust form. This includes applications like transporting gas, plumbing, electrical conduits, and the like. This type of pipe is also cheaper than a spiral welded pipe, which can make it the more cost-effective choice for some projects.
Spiral welded pipes, on the other hand, can fulfill more variations in length, thickness, and diameter. This allows it to be the better option for projects that need custom-made pipes. Furthermore, its superior strength makes it the ideal pipe for high-pressure, high-temperature applications. This includes transporting certain gasses, liquids, and oil, and use in industries like pharmaceuticals. However, it takes longer to produce, and can be more expensive to purchase.
Q: What are the applications of Spiral Welded Pipe?
Deep foundations are required when the shallow soils are not strong enough to support the loads from the structure. Pipe piles are commonly used in deep foundations and transfer the loads from building to stronger soil layers found deep underground. The loads are resisted through skin friction and point bearing. Pipe can be driven either open-ended or closed-ended, with points or plates. If driven with plates, the pipes can then be filled with concrete to add strength to the pile. Usually the money spent on plates, rebar, and concrete would be better spent on a larger, thicker pile. Pipe piles range in size from several inches to several feet in diameter and can be easily spliced to create piles hundreds of feet in length.
DRILLED SHAFT CASING
Pipe casing, temporary or permanent, is often required during the construction of drilled shafts. The casing is used to hold the hole open while the reinforcement cage and concrete are installed. The ability to inspect the bottom of the hole and the elimination of any variations in the diameter of the finished drilled shaft makes for a much higher quality, finished pile.
COMBINATION WALLS
Large diameter pipes have high bending strengths and are often used in combination sheet pile walls. The combination of large diameter pipe piles and steel sheet piles, which is often referred to as combi-walls, pipe-z walls or king pile walls, makes a very efficient system. Like other combined walls, the king pile takes the majority of the load and the sheet pile transfers the load to the pipe and to the soil.
STRUCTURAL SECTIONS
The symmetry of pipe gives it the same bending strength, in any direction, which makes it an excellent product for the resistance of buckling. The stress required to buckle an axial member decreases with length. The radius of gyration has the opposite effect and increases the ability of a section to resist buckling. The W and HP sections have differnt radii of gyration (rx and ry) for the X and Y axes, while remaining constant for a pipe. The end result is that a pipe can take much higher loads for long, unsupported lengths.
JACKED & BORED PIPE
The placement of underground utilities is often done with jacked and bored pipe. Sections of pipe are pushed through the ground with hydraulic jacks between excavations or under a hill. The next section of pipe is then spliced onto the first and the jacking continues. Once the jacking is complete, the pipe is cleaned out to install the utilities. This allows the placement of utilities without extensive excavation which can disrupt roads, railroads, homes and businesses.
SEWER/WATER LINE PIPE
Welded steel pipe provides an effective method for transporting liquids, air, and gas. Steel Pipe is pound per pound stronger than any other type of line pipe. Pipe can be designed to handle both the internal and external pressures of most applications. Welded steel pipe offers many advantages, such as: strength, economy and ease of installation.
Q: What is the manufacturing process of Spiral Welded Pipe?
The strip head and tail are connected by single wire or double wire submerged arc welding, and automatic submerged arc welding is used for repair welding after coiling into steel pipe.
Before forming, the strip undergoes leveling, edge trimming, edge planing, surface cleaning and conveying, and pre-bending treatment.
The electric contact pressure gauge is used to control the pressure of the cylinders on both sides of the conveyor to ensure the smooth transportation of the strip.
Adopt external control or internal control roll forming.
The welding seam gap control device is adopted to ensure that the welding seam gap meets the welding requirements, and the pipe diameter, the amount of misalignment and the welding seam gap are all strictly controlled.
Both internal welding and external welding adopt American Lincoln electric welding machine for single-wire or double-wire submerged arc welding to obtain stable welding specifications.
The welded seams after welding are inspected by an online continuous ultrasonic automatic flaw instrument, which guarantees 100% non-destructive testing coverage of spiral welds. If there is a defect, it will automatically alarm and spray the mark, and the production workers can adjust the process parameters at any time to eliminate the defect in time.
Use an air plasma cutting machine to cut the steel pipe into individual pieces.
After cutting into single steel pipes, the first three of each batch of steel pipes shall undergo a strict first inspection system to check the mechanical properties, chemical composition, fusion status of the welds, the surface quality of the steel pipes and pass non-destructive inspections to ensure that the pipe manufacturing process is qualified Later, it can be officially put into production.
The parts with continuous sonic flaw detection marks on the weld are re-examined by manual ultrasonic and X-ray. If there are defects, after repairing, they will go through non-destructive inspection again until the defects are confirmed.
The pipes where the strip steel butt welding seams and the D-shaped joints intersecting with the spiral welding seams are all inspected by X-ray television or filming.
Each steel pipe undergoes hydrostatic pressure test, and the pressure adopts radial seal. The test pressure and time are strictly controlled by the steel pipe hydraulic microcomputer detection device. The test parameters are automatically printed and recorded.
The pipe end is machined to accurately control the verticality of the end face, bevel angle and obtuse edge.
Q: What are the surface treatment methods for Spiral Welded Pipe?
Solvent and emulsion are used to clean the spiral welded pipe surface, removing oil, grease, dust, smoothing agents, and other organic matter. However, it cannot remove rust, oxide skin, flux, or other organic matter from the steel surface. It is used as an additional measure in spiral welded pipe anti-corrosion production.
Rust Removal Tool
The spiral welded pipe is polished using wire brushes to remove loose or elevated scale, rust, welding slag, and other contaminants. The hand tool’s rust removal can reach the Sa2 level, while the power tool’s rust removal can reach the Sa3 level. The rust removal result of the tool is not ideal if the spiral welded pipe surface is attached with a strong iron oxide scale.
Pickling
Chemical and electrolytic procedures are commonly used for pickling disposal. Only chemical pickling can remove oxide scale, rust, and old coatings and is applied as sandblasting following rust removal. Chemical cleaning can achieve the necessary cleanliness and roughness, but the anchor pattern is shallow, making the situation simple to contaminate.
Blasting with abrasive materials
Abrasive blasting uses a high-powered engine to spin the spray (throwing) blade at high speed, allowing abrasives like steel grit, steel shot, wire segment, and mineral to be sprayed (throwing) on the surface of the steel tube under the influence of centrifugal force. Not only can rust, oxides, and dirt be fully removed, but under the influence of abrasive impact and friction, the spiral welded pipe may also achieve the needed average roughness.
After spraying (polishing) and eliminating rust, as well as the mechanical adhesion between the anti-corrosion layer and the spiral welded pipe’s outer surface. As a result, spray (polishing) rust removal is an excellent approach for removing rust from pipes. Sandblasting descaling is mostly utilized for internal and exterior pipe treatment, while shot blasting (sand) descaling is primarily used for pipe surface treatment.
Q: What are the advantages of Spiral Welded Pipe compared to other steel pipes?
The spiral weld is subjected to less stress than the straight seam, which is 75 percent to 90 percent of the straight seam welded pipe, and hence can bear immense pressure under the same pressure settings. The wall thickness can be lowered by 10% to 25% under the same pressure as a straight seam welded pipe of the same outside diameter.
The size is precise, with a general diameter tolerance of less than 0.12%, a deflection of less than 1/2000, and an elasticity of less than 1%. In most cases, the size and straightening process is straightforward.
It can be created indefinitely. In theory, it can make infinitely long steel pipes with a minimal cutting head and tail cutting losses, increasing the metal utilization rate by 6% to 8%.
It is more flexible in operation and easy to modify the variety than straight seam welded pipe.
The equipment is lightweight and requires a minimal initial cost. It can be built into a piece of trailer-type portable equipment, and the welded pipe can be produced on-site at the pipeline installation site.
Mechanization and automation are simple to implement.
Q: What are the main process features of Spiral Welded Pipe?
2. Adopt advanced double-sided submerged arc welding technology to deal with some defects, and it is easy to control the welding quality.
3. Carry out 100% quality inspection on the steel pipe, so as to guarantee the product quality.
4. All equipment in the entire production line 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 controlled by the control room.
For the heating process, heat treatment heating equipment and heating medium should be selected. What happens or is easy to happen here is that the surface of the part will be affected by the oxidizing heating medium, and the heating temperature exceeds the process requirements. If the austenite grains are too thick, even the grain boundaries will melt, which will seriously affect the appearance and internal quality of the parts. Therefore, in the actual process, feasible measures should be taken to analyze such defects.
The defective parts produced during tempering are quenched to obtain a quenched martensite structure with high hardness or a lower bainite structure with a slightly lower hardness, but the structure is unstable and brittle. When used in production, it is tempered to obtain the desired structure and properties. Therefore, tempering process parameters will have an important impact on the heat treatment quality of parts, such as hardness, tempering brittleness, tempering cracks and other defects, and measures should be taken to avoid these defects during tempering.
The correct heat treatment process is the premise and basis for ensuring the qualified heat treatment quality of parts. Once the above quality problems are found, they can be solved from the aspects of people, machines, materials, methods, links, inspections, etc. Through analysis and judgment, the root cause of the defect can be found.
Q: What are the storage tips for Spiral Welded Pipe?
Materials that corrode steel such as acid, alkali, salt, and cement shall not be stacked in the warehouse, and steel of different types shall be stacked separately. Prevent confusion and contact corrosion.
Small and medium-sized section steel, wire rod, steel bar, medium-diameter steel pipe, steel wire and wire rope, etc. After laying and cushioning, it can be stored in a well-ventilated shed.
Small steel, thin steel plate, steel strip, silicon steel sheet or thin-walled spiral steel pipe can be stored. A variety of high-value, corrosive cold-rolled and cold-drawn steel and metal products can be stored.
Q: What are the differences in technical features between Spiral Welded Pipe and Straight Seam Welded Pipe?
LSAW pipes are produced from steel plates, while spiral welded pipes are produced from hot-rolled coils. The rolling process of the hot strip steel mill has a series of advantages, and it has the metallurgical process capability to produce high-quality pipeline steel.
Welding process
In terms of the welding process, the welding method of spiral welded pipe is the same as that of straight seam steel pipe, but the straight seam welded pipe will inevitably have many T-shaped welds, so the probability of welding defects is greatly increased, and the welding residue at the T-shaped weld The stress is large, and the weld metal is often in a three-dimensional stress state, which increases the possibility of cracks. Moreover, according to the submerged arc welding process regulations, each weld should have an arc ignition point and an arc extinction point, but each longitudinal welded pipe cannot meet this condition when welding the circumferential seam, so there may be an arc extinction point. More welding defects.
Static pressures blasting strength
Related comparative tests have verified that the yield pressure on the spiral welded pipe and the longitudinally welded pipe is consistent with the actual and theoretical values of burst pressure, and the deviation is close. But whether it is yielding pressure or burst pressure, the spiral welded pipe is lower than that of straight seam welded pipe. The blasting test also showed that the circumferential deformation rate of the spiral welded pipe blasting port was significantly greater than that of the straight welded pipe. This proves that the plastic deformation ability of spiral welded pipe is better than that of straight seam welded pipe, and the blast opening is generally limited to one pitch, which is caused by the strong restraint effect of spiral weld on the expansion of the crack.
Toughness and fatigue strength
The trend of pipeline development is large diameter and high strength. As the diameter of the steel pipe increases and the grade in steel used increases, the tendency towards the ductile fracture tip to grow steadily becomes greater. According to the test conducted by relevant research institutions in the United States, although spiral welded pipe and longitudinal welded pipe are of the same level, the spiral welded pipe has a higher impact toughness. Due to changes in the transportation volume, the steel pipes are subjected to random alternating loads during actual operation. Understanding the low cycle fatigue strength of steel pipes is of the great significance of judging the service life of pipelines. According to the measurement results, the fatigue strength of spiral welded pipes is the same as that of seamless pipes and resistance welded pipes, and the test data are distributed over the same area as seamless pipes and resistance pipes, and are higher than general submerged arc longitudinal welded pipes.
Field solderability
The weldability on site is mainly determined by the material of the steel pipe and the tolerance of the port size. Taking into account the requirements of steel pipe installation and construction, the continuity of steel pipes processing and production and the consistency of shape and geometric dimensions are particularly important. The production of a spiral welded pipe is a stable continuous process of the same working conditions: while the production process of straight seam welded pipe is segmented, including the whole plate/indenter/pre-rolling/spot welding/welding/finishing/grouping, etc. Multi-process process. This is an important feature that distinguishes spiral welded pipe production of straight seam welded pipe production. Stable production conditions are very convenient for the control of welding quality and the guarantee of geometric dimensions. Because the spiral welded pipe has a regular pipe shape and evenly distributed weld seams, the spiral steel pipe has very good nozzle ovality and end surface perpendicularity compared with straight seam welded pipes, which ensures the accuracy of the on-site pipe welding assembly.
Q: What industries can Spiral Welded Pipe be used in?
Spiral welded pipe is used extensively in the petroleum industry. The pipes are used for various purposes, including crude oil, natural gas, and water. Spiral welded pipe is also used to construct offshore platforms and oil rigs.
Chemical Industry
Spiral welded pipe is also used in the chemical industry. The pipes are used to transport a variety of chemicals, including acids, bases, and solvents. Spiral welded pipe is also used to construct storage tanks and reactors.
Power Generation Industry
Spiral welded pipe is also used in the power generation industry. The pipes carry steam, water, and other fluids in power plants. Spiral welded pipe is also used to construct cooling towers and condensers.
Water Treatment Industry
Spiral welded pipe is also used in the water treatment industry. The pipes are used to carry water to and from treatment plants. Spiral welded pipe is also used in the construction of reservoirs and dams.
Mining Industry
Spiral welded pipe is also used in the mining industry. The pipes are used to carry a variety of materials, including coal, ore, and waste rock. Spiral welded pipe is also used to construct mine shafts and tunnels.
Q: What are the applications of Spiral Welded Pipe in the construction industry?
Frame structure: Spiral welded pipes can also be used to build building frame structures. For example, using spiral welded pipes to make steel structural frames can effectively improve the load-bearing capacity and earthquake resistance of the building.
Pipeline system: Spiral welded pipes are used for the layout of water, gas, electricity, heating and other pipeline systems inside and outside buildings. They have the advantages of corrosion resistance and pressure resistance, ensuring the normal operation of the pipeline system.
Decoration: Spiral welded pipes can also be used for decoration of buildings, such as suspended ceilings, stair handrails, railings, etc. The surface of spiral welded pipe is flat and smooth, and various shapes and design effects can be easily achieved.
Q: How To Increase the Stable Performance of Spiral Welded Pipes?
Materials required for manufacturing spiral welded pipes are wanted for careful storage and placement. For example:
Small and medium-sized steel plates and steel strips, in addition to storage in the warehouse, can be stored in a well-ventilated shed, but they must be placed on the mat.
Large steel plates can be stacked in the open air.
Manufacturing Process
The manufacturing procedure is a vital part, which can largely determine the quality of a spiral welded pipe, indirectly affecting its stability. In this step, you can do the following points:
During the forming process, the deformation of the steel plate should be uniform, the residual stress should be small, and the surface should not be scratched.
Using the advanced double-sided submerged arc welding process. This can realize welding in a good position, not easy to have defects like misalignment, welding deviation, and incomplete penetration. It can well control the product quality.
The quality inspection is throughout so that the whole making process of steel pipe production is under effective detection and monitoring, which ensures product quality.
All equipment of the entire production line has to network with the computer data acquisition system to realize real-time data transmission. That is to say, the central control room is responsible for all technical parameters in the production process.
Location
The site for laying spiral welded piping products should be selected in a clean and well-drained place, away from factories and mines that generate harmful gases or dust. Also, weeds and all debris should be removed from the site immediately to keep the steel pipes clean.
Warehouse
The warehouse should meet the following requirements:
Generally, an ordinary closed warehouse should be used, that is, a warehouse with a roof, walls, tight doors and windows, and a ventilation device.
The warehouse requires attention to be ventilated on sunny days and closed to prevent moisture on rainy days, aiming to maintain a suitable storage environment.
Materials that are corrosive to steel piping, such as acid, alkali, salt, cement, etc., are not allowed to be stacked in the warehouse. In addition, different varieties of steel pipes should be stacked separately, such as stainless steel pipes and galvanized pipes, to prevent confusion and contact corrosion.
Q: What is the difference between ERW pipe and spiral welded pipe?