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Industrial-Grade Stainless Steel Pipe Tube | ASTM-Certified
Industrial-Grade Stainless Steel Pipe Tube | ASTM-Certified
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Industrial-Grade Stainless Steel Pipe Tube | ASTM-Certified
Product Overview
Our stainless steel pipe tube series is engineered for extreme durability across industrial, chemical, and architectural applications. Crafted from stainless steel 304 pipes & tubes, these ASTM-certified products combine corrosion resistance, high-temperature stability, and structural integrity. Compliant with ASTM A312, A269, and ISO 1127 standards, they are ideal for pipelines, boilers, and food-grade systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Diameter | 6mm–300mm (±0.1mm to ±1% tolerance) |
| Wall Thickness | 0.5mm–15mm (Sch 5S to Sch 80S) |
| Length | 1m–12m (standard), custom-cut (±2mm accuracy) |
| Material Grades | 304, 304L, 316, 316L (Cr 18–20%, Ni 8–12%, Mo 2–3% for 316) |
| Hardness (HRB) | 80–95 (Annealed state) |
| Surface Finish | Annealed/pickled, polished (180–600 grit), or sandblasted |
| Standards | ASTM A312, A269, A213, EN 10216-5 |
Mechanical Properties
-
Tensile Strength:
- 304/304L: ≥515 MPa ultimate tensile strength, ensuring resilience in high-pressure systems like hydraulic pipelines.
- 316/316L: ≥550 MPa, enhanced by molybdenum for chloride-rich environments (e.g., seawater or chemical plants).
-
Bending Strength:
- Withstands 180° cold bending (mandrel diameter = 3x tube diameter) without cracking. Suitable for coiled heat exchangers and structural frameworks.
Identification & Marking
- Laser Etching: Each stainless steel pipe tube is marked with grade (e.g., 304), thickness, heat number, and ASTM/EN certification.
- Color Coding: Blue for 304, yellow for 316, and green for duplex grades.
Weight Calculation Formula
Weight per meter (kg/m) = , where:
- = Outer diameter (mm)
-
= Wall thickness (mm)
Example: A 50mm OD x 3mm WT stainless steel 304 pipes & tubes weighs .
Why Does Stainless Steel Rust?
While stainless steel resists corrosion due to its chromium oxide layer (≥10.5% Cr), rust can occur under extreme conditions:
- Chloride Exposure: Saltwater or bleach degrades the passive layer, causing pitting (common in 304 without Mo).
- Galvanic Corrosion: Contact with carbon steel or copper in humid environments accelerates oxidation.
- High-Temperature Oxidation: Prolonged exposure above 870°C (1600°F) depletes chromium, leading to scaling.
Manufacturing Process
| Step | Description |
|---|---|
| Hot Extrusion | Billets heated to 1200°C and formed into hollow tubes via piercing mills. |
| Cold Drawing | Tubes are drawn through dies to achieve precise dimensions and surface finishes. |
| Solution Annealing | Heated to 1050–1100°C and water-quenched to restore corrosion resistance and ductility. |
| Surface Treatment | Pickling with HNO3/HF to remove scale, followed by passivation for enhanced oxide layer. |
Applications
- Chemical Processing: 316L tubes for sulfuric acid pipelines and reactor coils.
- Food & Beverage: Polished stainless steel 304 pipes & tubes meet FDA/3A hygiene standards.
- Architecture: Seamless tubes for handrails, curtain walls, and HVAC systems.
- Energy: ASTM A213 TP304H superheater tubes in boilers (≤600°C).
Why Choose Our Stainless Steel Solutions?
- Certified Quality: Dual ISO 9001 and PED 2014/68/EU certification for pressure equipment.
- Customization: Laser-cut threads, flared ends, or perforations tailored to your project.
- Global Logistics: As a leading stainless steel pipe tube china supplier, we offer FOB/CIF shipping to 100+ countries.
- Technical Support: Free metallurgical consultations and CAD/CAM file preparation.
Supply & Compliance
- Fast Delivery: 15–20 days for standard sizes; expedited production for urgent orders.
- Testing Reports: Third-party NACE TM0177 (SSC), IGC, and hydrostatic test certificates.
- Sustainability: 70% recycled content and RoHS-compliant production.
Why Choose Our Stainless Steel Products?
- Superior Alloy Design: Our 316L tubes include 2.1% molybdenum for marine environments, outperforming generic grades.
- Cost Efficiency: Competitive pricing from stainless steel pipe tube china mills, 15–30% below EU/US market rates.
- Lifespan Guarantee: 25-year anti-corrosion warranty for coastal installations.
- End-to-End Traceability: RFID tagging and mill test reports for every batch.
