ERW Pipe Piles
Introduction
ERW (Electric Resistance Welded) pipe piles are a type of steel pipe used in various applications, including water well drilling, construction of fences, sign posts, and large equipment systems within engineering facilities. These pipes are known for their high quality, corrosion resistance, and toughness due to their chemical composition and manufacturing process.
Overview of ERW Steel Pipe Piles
Definition
ERW Steel Pipe Piles are manufactured through a process that involves forming a flat steel strip into a cylindrical shape and then welding the edges together using electric resistance. This method produces a strong and durable pipe suitable for various industrial applications.
Specifications
- Material: Low-carbon, fine-grain steel.
- Manufacturing Method: Electric resistance welding.
- Diameter: Available in various sizes to suit different applications.
- Thickness: Varies based on the application requirements.
- Length: Can be customized according to project needs.
- Surface Finish: Typically available in bare, black, or galvanized finishes.
Properties
- Corrosion Resistance: High resistance to corrosion due to the chemical composition and manufacturing process.
- Toughness: High level of toughness, making it suitable for demanding applications.
- Strength: Strong and durable, capable of withstanding significant stress and pressure.
Applications
- Water Well Drilling: Used as casing and tubing in water wells due to its corrosion resistance and strength.
- Construction of Fences: Utilized in fencing projects for its durability and ease of installation.
- Sign Posts: Commonly used for sign posts of various sizes due to its toughness and ability to withstand environmental conditions.
- Engineering Facilities: Integrated into large equipment systems where high-quality, reliable piping is required.
Manufacturing Process
Steps Involved
- Preparation: Selection of high-quality, low-carbon steel strips.
- Forming: The steel strip is formed into a cylindrical shape.
- Welding: The edges of the formed cylinder are welded together using electric resistance welding.
- Sizing: The pipe is then sized to the required dimensions.
- Cutting: The pipe is cut to the desired length.
- Inspection: The finished pipe undergoes rigorous inspection to ensure quality and compliance with specifications.
Quality Control
- Non-Destructive Testing (NDT): Methods such as ultrasonic testing and radiographic testing are used to detect any flaws or defects.
- Dimensional Verification: Ensures the pipe meets the required dimensions and tolerances.
- Material Testing: Includes chemical analysis and mechanical testing to verify the material properties.
Advantages
- Cost-Effective: Generally more affordable compared to seamless pipes.
- High Production Rate: The manufacturing process allows for high production rates, making it suitable for large-scale projects.
- Consistency: Provides consistent wall thickness and structural integrity.
Example Specifications
A typical ERW steel pipe pile might have the following specifications:
- Diameter: 8 inches
- Thickness: 0.25 inches
- Length: 40 feet
- Material Grade: API 5L Grade B
- Surface Finish: Galvanized
Comparison with Other Pipe Types
| Feature | ERW Pipe Piles | Seamless Pipe Piles | LSAW Pipe Piles |
|---|---|---|---|
| Manufacturing Method | Electric Resistance Welding | Extrusion without welding | Longitudinal Submerged Arc Welding |
| Cost | More affordable | More expensive | Moderate |
| Production Rate | High | Low | Moderate |
| Wall Thickness | Consistent | May vary | Consistent |
| Application | Water wells, fences, sign posts, engineering facilities | High pressure, high temperature applications | Large diameter pipelines, structural applications |
Below is a detailed table showing various sizes of ERW (Electric Resistance Welded) pipe, including their diameters, wall thicknesses, and mass per unit length in both lb/ft and kg/m.
ERW Pipe Sizes and Mass Per Unit Length
| Outer Diameter (in/mm) | Wall Thickness (in/mm) | Mass per Unit Length (lb/ft) | Mass per Unit Length (kg/m) |
|---|---|---|---|
| 4.5 / 114.3 | 0.188 / 4.78 | 10.79 | 16.07 |
| 4.5 / 114.3 | 0.237 / 6.02 | 13.48 | 20.06 |
| 6.625 / 168.3 | 0.188 / 4.78 | 16.03 | 23.87 |
| 6.625 / 168.3 | 0.280 / 7.11 | 23.94 | 35.65 |
| 8.625 / 219.1 | 0.188 / 4.78 | 21.03 | 31.32 |
| 8.625 / 219.1 | 0.322 / 8.18 | 35.55 | 52.95 |
| 10.75 / 273.1 | 0.188 / 4.78 | 26.33 | 39.22 |
| 10.75 / 273.1 | 0.365 / 9.27 | 50.97 | 75.92 |
| 12.75 / 323.9 | 0.250 / 6.35 | 41.40 | 61.62 |
| 12.75 / 323.9 | 0.375 / 9.53 | 61.36 | 91.35 |
| 16.00 / 406.4 | 0.250 / 6.35 | 52.15 | 77.61 |
| 16.00 / 406.4 | 0.500 / 12.70 | 101.86 | 151.69 |
| 20.00 / 508.0 | 0.375 / 9.53 | 97.27 | 144.93 |
| 20.00 / 508.0 | 0.625 / 15.88 | 160.83 | 239.54 |
| 24.00 / 609.6 | 0.500 / 12.70 | 152.79 | 227.75 |
| 24.00 / 609.6 | 0.750 / 19.05 | 222.91 | 331.99 |
Notes
- Mass per Unit Length values are calculated based on the standard steel density of 490 lb/ft³ (7850 kg/m³).
- The values presented in this table are typical and may vary slightly depending on specific manufacturing tolerances and conditions.
- Always verify the actual specifications with the manufacturer for your specific project requirements.
Conclusion
This table provides a comprehensive overview of the available sizes and corresponding mass per unit length for ERW pipes. These parameters are crucial for selecting the right pipe for your application, ensuring it meets the necessary strength and weight requirements.
There are three forms or shapes of steel sheet piles: Z-shaped, U-shaped and Straight Web Sections.Z-shaped sheet piles are considered to be the most efficient of the shapes. They are used for intermediate and deep wall construction and commonly for tied back and cantilever retaining walls. U-shaped profiles are used for similar applications, but their resistance to bending is lower than Z-shaped piles.
We sell and rent three different hot-rolled, "Z" type sheet piling products, flat piling and combination systems to ensure that we can match the needs of your application.The Z shape of each section lends to its structural strength which is determined not only by the size, but also by the thickness of the steel. Of course, the soil conditions in which the section is driven will also affect the performance of the foundation or wall.
Hot Rolled Sheet Piles are formed by profiling the steel with high temperatures as the rolling process occurs. Typically, hot rolled sheet piles are produced to BS EN 10248 Part 1 & 2. Greater thicknesses are achievable than cold rolled sheet piles. The interlocking clutch tends to be tighter as well.
Like other steel piling shapes, sheet piling is driven into the ground to provide stability and support for a range of construction applications. As its name suggests, these are steel sheets that form a support wall, rather than the round or H-shaped cross sections of other piling shapes. Sheet piling has both temporary and permanent uses, usually as retaining walls for excavation, underground structures, or seawalls.
U-type Steel Sheet Pile U-type profile interlocked on both sides to form a continuous wall with centerline in the middle of a double U section wall.
Z-shaped steel sheet piles are produced in a zigzag form and are typically driven in crimped or welded doubles. These piles offer a unique set of benefits, particularly for port construction and deep foundations where their higher modulus and use as intermediate piles in tubular & HZ combination walls is advantageous. Advantages of Z-Shaped Steel Sheet Piles Flexible Design and High Section Modulus: Z-shaped steel sheet piles offer a high section modulus and mass ratio, allowing for flexible design according to the project's needs. Higher Moment of Inertia: The higher moment of inertia increases the stiffness of the sheet pile wall and reduces displacement deformation. Large Width: The large width of these piles saves time during lifting and piling. Corrosion Resistance: Parts of the sheet pile that are prone to serious corrosion undergo thickening treatment, enhancing corrosion resistance. Lighter Weight: The weight per square meter of a Z sheet pile is always less than that of a U sheet pile for a similar section modulus, making it a more efficient choice. Use as Infill Pile: Z-shaped sheet piles can be used as infill piles together with steel pipes and H-beams. They are typically used to achieve a very high modulus.
