For businesses like SteelMerge dealing in stainless steel seamless pipes, providing precise and detailed specifications is crucial. Here’s an in-depth look at the specifications with detailed data:
- Material Grades:
- 304: General-purpose stainless steel with 18% chromium and 8% nickel.
- 316: Contains added molybdenum for enhanced corrosion resistance.
- 310: High-temperature resistance with 25% chromium and 20% nickel.
- 347: Stabilized with niobium for welding applications.
- Duplex: Combines austenitic and ferritic grades for improved strength and corrosion resistance.
- Dimensions and Size:
- Diameter: Ranges from 1/8 inch (approx. 3.175mm) to 24 inches (approx. 610mm).
- Wall Thickness: Typically available in schedules like SCH 10 (ranges from 1.24mm to 9.53mm), SCH 40 (ranges from 2.24mm to 17.48mm), and SCH 80 (ranges from 3.02mm to 22.23mm).
- Length: Standard lengths are 6 meters and 12 meters. Custom lengths are also available on request.
- Surface Finish:
- Annealed and Pickled: Common for general purposes.
- Bright Annealed: Smooth and reflective finish.
- Polished: Available in various grit finishes for specific requirements.
- Standards and Certifications:
- ASTM A312: Standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes.
- ASME SA312: Similar to ASTM with specific requirements for pressure vessels.
- EN Standards: European standards specifying dimensions, tolerances, and material properties.
- End Types:
- Plain End: For general welding.
- Beveled End: For welding in high-pressure applications.
- Threaded End: For easy connection without welding.
- Pressure Rating:
- Dependent on size and wall thickness. For example, a 4-inch SCH 40 pipe of 304-grade has a pressure rating of about 150psi at 400°F.
- Testing and Inspection:
- Hydrostatic Testing: Ensures the pipe can withstand the specified pressure.
- Ultrasonic Testing: Detects internal flaws.
- Eddy Current Testing: Checks for surface defects.
- Applications: Used in industries like petrochemicals, gas, and water treatment where robust and corrosion-resistant pipes are required.
- Customization: Available in terms of length, diameter, wall thickness, and material grade to meet specific project needs.
