Robust Stainless Steel Elbow | Industrial-Grade 90° Connections

Robust Stainless Steel Elbow | Industrial-Grade 90° Connections

​Product Overview

Our ​stainless steel elbow is engineered for precision and durability in high-pressure industrial environments. Designed for HVAC, petrochemical, and marine applications, these ​stainless steel 90 degree elbow and ​stainless steel 45 degree street elbow fittings offer exceptional corrosion resistance, leak-proof performance, and compliance with global standards like ASTM A403 and EN 10253-3. With advanced welding and forging techniques, our elbows ensure seamless integration into complex piping systems.

​Technical Specifications

​Key Technical Attributes

1. ​Tensile Strength:
   Our ​stainless steel 90 degree elbow achieves ​≥520 MPa tensile strength, exceeding ASTM A312 requirements. This ensures structural integrity in high-stress applications like offshore oil rigs and chemical reactors.

2. ​Bend Strength:
   The ​stainless steel 45 degree street elbow withstands ​**≥350 MPa bend strength without deformation, ideal for tight-radius installations in shipbuilding and power plants. Cold-formed elbows retain >90% original ductility after bending.

3. ​Marking & Identification:
   Each elbow is laser-etched with:

   • Material grade (e.g., 316L) and heat number.
   • Pressure class (e.g., Class 300) and compliance stamps (CE, ISO 9001).
   • QR codes linked to digital certificates for traceability.

4. ​Weight Calculation:
   Formula: ​Weight (kg) = 0.02466 × (OD – WT) × WT × L, where:

   • OD = Outer Diameter (mm)
   • WT = Wall Thickness (mm)
   • L = Elbow Length (mm)
     Example: A 6" SCH40S 316L elbow weighs ​12.7 kg.

5. ​Stainless Steel Rusting Causes:
   Despite chromium’s protective oxide layer (≥10.5% Cr), rust may occur due to:

   • ​Chloride Stress Corrosion: Common in coastal or chemical environments (e.g., offshore platforms).
   • ​Galvanic Coupling: Contact with carbon steel or copper alloys accelerates oxidation.
   • ​Mechanical Damage: Scratches during installation expose the substrate.

​Advanced Manufacturing Process

Our ​stainless steel elbow undergoes a 6-stage production workflow:

1. ​Material Selection:
   Cold-rolled 304/316L coils (2B finish) are sourced from ISO 14001-certified mills.

2. ​Hot Extrusion:
   Billets are heated to 1,200°C and extruded into elbow shapes using CNC mandrels (tolerance: ±0.1mm).

3. ​Welding & Seam Treatment:
   Longitudinal seams are TIG-welded (argon shielding) and polished to eliminate crevices.

4. ​Solution Annealing:
   Heat-treated at 1,050°C–1,100°C to dissolve carbides and restore corrosion resistance.

5. ​Surface Passivation:
   Immersed in nitric acid (20% v/v) to remove iron contaminants and enhance Cr oxide layer.

6. ​Quality Assurance:
   Hydrostatic tested at 1.5× rated pressure, with PMI verification for alloy composition.

    

​Why Choose Our Stainless Steel Elbows?

1. Unmatched Corrosion Resistance

• ​316L Grade: 2.5% Mo content resists pitting in chloride-rich environments (e.g., seawater).
  
• ​Passivation: Reduces surface iron content by 90%, preventing rust initiation.

2. Global Certifications & Compliance

• ​ASME B16.9/B16.28: Guarantees dimensional accuracy for global project compatibility.
• ​NACE MR0175: Suitable for sour gas (H2S) applications.

3. Customization & Precision

• ​Non-Standard Angles: 60° or 30° elbows available for specialized layouts.
• ​Threaded Ends: NPT, BSPP, or BSPT threads for easy retrofitting.

4. Sustainable & Cost-Effective

• ​30-Year Lifespan: Outlasts carbon steel elbows by 3× in corrosive settings.
• ​Recyclable: 100% scrap recyclable under ISO 14021 standards.

5. Logistics & Support

• 15-day lead time for bulk orders (≥500 units) with FOB/CIF terms.
• 24/7 technical support for weld procedure specifications (WPS) and material selection.