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High-Performance Stainless Steel 90 Degree Elbow | Seamless Design
High-Performance Stainless Steel 90 Degree Elbow | Seamless Design
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High-Performance Stainless Steel 90 Degree Elbow | Seamless Design
Product Overview
Our 90 degree elbow stainless steel is engineered for demanding industrial and commercial applications, offering seamless construction, exceptional corrosion resistance, and superior mechanical strength. Compliant with ASME B16.9, ASTM A403, and DIN 2605 standards, these elbows are ideal for high-pressure piping systems in petrochemical, oil & gas, marine, and automotive exhaust systems (e.g., 3 inch 90 degree exhaust elbow stainless steel). Available in short-radius (SR) and long-radius (LR) configurations with customizable surface finishes.
Technical Specifications
1. Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤0.08 |
| Chromium (Cr) | 16.0–20.0 |
| Nickel (Ni) | 8.0–12.0 |
| Molybdenum (Mo) | 0.75–2.0 (316/316L) |
| Manganese (Mn) | ≤2.00 |
| Silicon (Si) | ≤1.00 |
Grades: 304/304L, 316/316L, 321; compliant with ISO 9001 & PED 2014/68/EU.
2. Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 485–620 MPa |
| Yield Strength (0.2% Offset) | 170–310 MPa |
| Elongation (%) | ≥35–60 |
| Hardness (Rockwell B) | ≤90 HRB |
| Pressure Rating (Sch40) | 150–6000 PSI |
3. Dimensions & Configurations
| Type | Radius (D) | Thickness (mm) | Outer Diameter (inches) | Wall Thickness (SCH) |
|---|---|---|---|---|
| Stainless Steel Pipe Elbow (LR) | 1.5D | 1.5–40 | ½"–48" | 10S, 40S, 80S, 160S |
| Stainless Steel Pipe Elbow (SR) | 1.0D | 2.0–30 | ½"–24" | 5S, STD, XS |
Surface finishes: Mirror, 2B, BA, HL, sandblasted; custom electro-polishing available.
4. Process & Certifications
| Process | Description |
|---|---|
| Seamless Forging | Hot extrusion for uniform grain structure and high-pressure resistance |
| Welding | TIG/MIG welding with argon shielding for oxidation-free joints |
| Heat Treatment | Solution annealing at 1040–1120°C to eliminate stress |
| Testing | 100% hydrostatic, PMI, and X-ray inspection per EN 10204 3.1 |
Performance Details
1. Tensile & Bend Strength
- Tensile Strength: Withstands up to 620 MPa, ensuring structural integrity in high-pressure systems like oil pipelines.
- Bend Strength: Achieves 180° cold bending at 1T radius without cracking, ideal for tight installations (e.g., 3 inch 90 degree exhaust elbow stainless steel).
2. Weight Calculation
Calculate elbow weight using:
Weight (kg) = 0.0387 × (OD – WT) × WT × R × 0.02466
Example: A 3" Sch40 elbow (OD=88.9mm, WT=5.49mm, R=1.5D) ≈ 1.72 kg.
3. Marking & Traceability
Elbows are laser-etched with:
- Grade (304/316L)
- Heat number
- Standard (ASME B16.9)
- Size (e.g., 3" × SCH40)
- Manufacturer logo.
4. Why Stainless Steel Rusts?
While stainless steel resists corrosion, rust can occur due to:
- Chloride Exposure: Prolonged contact with seawater or road salts disrupts the chromium oxide layer.
- Mechanical Damage: Scratches from tools expose the iron substrate to oxidation.
- Low Oxygen Environments: Stagnant water in crevices inhibits oxide regeneration.
- Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel) triggers electrochemical reactions.
Key Applications
- Petrochemical: High-pressure fluid transfer in refineries.
- Automotive: Durable 3 inch 90 degree exhaust elbow stainless steel for emission systems.
- Marine: Saltwater-resistant piping on ships and offshore platforms.
- Food & Pharma: Hygienic 316L elbows for sanitary processing lines.
Why Choose Our Stainless Steel Elbows?
- Certified Quality: ISO 9001, PED, and TÜV-certified production with full MTCs.
- Seamless Durability: Forged construction eliminates weak joints.
- Global Compliance: Meets ASME, DIN, JIS, and GB standards.
- Custom Solutions: Tailored stainless steel pipe elbow dimensions, finishes, and pressure ratings.
- Rapid Delivery: 15–30 days for standard orders; expedited services available.
