SAWH Steel Pipe
SAWH (Spiral Submerged Arc Welded) Steel Pipe
SAWH (Spiral Submerged Arc Welded) steel pipes are widely used in various industries for their strength, durability, and cost-effectiveness. These pipes are manufactured using a spiral welding process, which provides enhanced structural integrity and allows for the production of large diameter pipes.
Key Features
- Manufacturing Process: Spiral Submerged Arc Welding (SAW)
- Grades:
- API 5L (various grades such as X42, X52, X60, X70)
- ASTM A252
- ISO 3183
- Sizes:
- Outside Diameter: 8” to 120” (219.1 mm to 3048 mm)
- Wall Thickness: 0.157” to 1.575” (4 mm to 40 mm)
- Lengths: Up to 18 meters or custom lengths as per requirements
Chemical Composition
The chemical composition varies based on the specific grade and standard. Below is a general example for API 5L Grade X52:
| Element | Maximum Percentage (%) |
|---|---|
| Carbon (C) | 0.22 |
| Manganese (Mn) | 1.40 |
| Phosphorus (P) | 0.025 |
| Sulfur (S) | 0.015 |
| Silicon (Si) | 0.45 |
Mechanical Properties
Mechanical properties also depend on the specific grade and standard. Below is an example for API 5L Grade X52:
| Property | Value |
|---|---|
| Yield Strength (min) | 52,000 psi (360 MPa) |
| Tensile Strength (min) | 66,000 psi (455 MPa) |
| Elongation (min) | 21% |
SAWH Manufacturing Process
- Steel Coil Preparation: High-quality steel coils are selected and prepared.
- Edge Preparation: Edges of the steel coils are trimmed and beveled to ensure proper weld seam.
- Forming: Steel coils are fed into a spiral forming machine where they are formed into a spiral shape.
- Tack Welding: The edges of the spirally formed pipe are tack-welded to hold the shape.
- Submerged Arc Welding: The spiral seam is welded using submerged arc welding both internally and externally, ensuring deep penetration and strong weld integrity.
- Inspection: Pipes undergo various non-destructive tests such as ultrasonic testing, radiographic testing, and visual inspection to ensure weld quality and pipe integrity.
- Hydrostatic Testing: Each pipe is subjected to hydrostatic pressure testing to verify its pressure resistance.
- Finishing: Final processes include end beveling, coating, and marking as per customer specifications.
Applications
- Oil and Gas Transportation: Used in pipelines for transporting oil, gas, and other fluids.
- Water Transmission: Suitable for water supply and drainage systems.
- Structural Applications: Used in construction of bridges, buildings, and other infrastructure projects.
- Piling Foundations: Employed as piling pipes in foundation construction.
- Mechanical Applications: Utilized in various industrial and mechanical applications.
Advantages
- High Strength: Capable of withstanding high pressure and stress.
- Cost-Effective: Efficient manufacturing process reduces production costs.
- Large Diameter Production: Spiral welding allows for the production of large diameter pipes.
- Strong Weld Integrity: Spiral weld provides a strong and reliable seam.
- Versatility: Suitable for a wide range of applications and environments.
- Quality Assurance: Rigorous testing ensures high-quality output and compliance with standards.
Conclusion
SAWH steel pipes are an excellent choice for various industrial applications due to their strength, durability, and cost-effectiveness. Whether used in oil and gas transportation, water transmission, structural projects, or mechanical applications, these pipes provide reliable performance and long-term durability. The spiral welding process ensures strong weld integrity and allows for the production of large diameter pipes, making SAWH pipes a versatile and efficient solution for many engineering and construction needs.
Longitudinally Submerged Arc Welding Pipe is subdivided into UOE, RBE, JCOE steel pipe according to its different forming methods. Longitudinal high-frequency welded steel pipe has the characteristics of relatively simple process and fast continuous production, and has wide use in civil construction,petrochemical, light industry and other sectors. Mostly used to transport low pressure fluids or made into various engineering components and light industrial products.
LSAW steel pipes, whether produced through UOE, JCOE (Press Bending), or JCOE (Roll Bending) methods, are integral to various industrial applications due to their high strength, dimensional accuracy, and compliance with numerous international standards. Each manufacturing process has its unique advantages, making these pipes suitable for transporting fluids and gases, as well as for use in structural and engineering projects.
DSAW pipes are an excellent choice for demanding applications due to their manufacturing precision, strength, and versatility. Whether straight or spiral welded, these pipes meet stringent industry standards and are a reliable solution for transporting fluids and gases under high pressure.
ASTM A53 LSAW steel pipes are a reliable choice for various industrial applications due to their strength, durability, and high-quality manufacturing process. Whether used in the transportation of fluids, structural projects, or mechanical systems, these pipes provide excellent performance and long-term reliability.
ASTM A252 LSAW and DSAW steel pipes are excellent choices for piling foundations and structural supports due to their strength, durability, and high-quality manufacturing processes.
EN 10219 LSAW and DSAW steel pipes are essential in various structural and engineering applications due to their high strength, durability, and precise manufacturing processes. These pipes provide reliable performance in demanding environments, making them an excellent choice for construction, infrastructure, and mechanical applications.
