Nickel Welded 90 Degree Elbow

 

 

 

Material: Nickel

Grade: NI200, NI201

OD: DN100-DN1200; 5"-46"; 114-1200mm;

Type: 1.5D, 2D, 3D, 5D elbow

Type1: Welded Elbow

Type 2: Long Radius, Short Radius

The radius of curvature of a long radius elbow is 1.5 times the diameter of the pipe,

The radius of curvature of a short radius elbow is equal to the diameter of the pipe.

Degree:90 degree

Thickness: Sch5s, Sch10s, Sch40s, STD, Sch40, Sch60, Sch80s, Sch80

Surface Treatment: Pickling, Polished, Sandblasting

Elbow Standard: ASME B16.9

Material Standard: ASTM B862

Welding Method: TIG, GTAW, 2PCS WELDING LINES

Inspections: 100% RT X-Ray, 100% PT, MTR

Accept customized shape Nickel Welded 90 Degree Elbow according detail drawing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Anodic Protection use Nickel Welded 90 Degree Elbow
Principle: Forms a passive oxide layer on metals (e.g., nickel, titanium).
How it works:
- Applied voltage keeps metal in the passive region of polarization.
- Used in sulfuric acid tanks, chemical reactors.

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Electrochemical Chlorination (On-Site Hypochlorite Generation)
Principle:Electrolysis of brine (NaCl) produces sodium hypochlorite (NaOCl) for:
- Disinfection (kills bacteria, prevents MIC)
- Biofouling control** in cooling towers & pipelines.

Advantages:
✔ Reduces chemical transport/storage risks
✔ Cost-effective for large-scale water treatment

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Advanced Water Treatment Technologies for Corrosion Control
A. Corrosion Inhibitors
| Type | Mechanism | Common Chemicals |
|----------|--------------|---------------------|
| Anodic Inhibitors | Forms oxide layer | Chromates, molybdates, nitrites |
| Cathodic Inhibitors | Reduces O₂ reduction | Zinc, polyphosphates |
| Mixed Inhibitors | Adsorbs on metal surface | Silicates, organic amines |
| Volatile Corrosion Inhibitors (VCI)| Vapor-phase protection | Ammonium salts, morpholine |

Best for:
✔ Cooling water systems
✔ Boiler feedwater
✔ Closed-loop systems

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B. Oxygen Scavengers (For Boiler & Feedwater Systems)
- Hydrazine (traditional, but toxic)
- DEHA (Diethylhydroxylamine) – safer alternative
- Sodium sulfite** – cost-effective for low-pressure boilers

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C. pH Adjustment & Alkalinity Control
- Optimum pH for steel:8.5–9.5 (minimizes corrosion)
- Chemicals used:
- Caustic soda (NaOH) – raises pH
- CO₂ dosing– lowers pH in alkaline water

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D. Advanced Monitoring & Predictive Technologies
1. Linear Polarization Resistance (LPR) Probes
- Measures real-time corrosion rates in water systems.
2. Electrochemical Noise (EN) Sensors
- Detects localized corrosion (pitting, crevice).
3. Remote IoT-Based Corrosion Monitoring
- Cloud-based analytics for predictive maintenance.

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3. Industry-Specific Solutions
A. Cooling Water Systems
- Problem: Scaling, MIC, galvanic corrosion.
- Solution:
- ICCP + Biocide treatment
- Polyphosphate/Zinc inhibitors

B. Oil & Gas (Produced Water, Pipelines)
- Problem:CO₂/H₂S corrosion, erosion.
- Solution
- Cathodic protection (ICCP for pipelines)
- Filming amines (e.g., oleic imidazoline)

C. Desalination & RO Plants
- Problem: Chloride-induced corrosion (nickel-Ni alloys).
- Solution:
- Anodic protection (for high-salinity brine)
- Non-oxidizing biocides (DBNPA)

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4. Emerging Green Technologies
- Bio-based corrosion inhibitors (e.g., plant extracts, chitosan).
- Conductive polymer coatings (PEDOT, polyaniline).
- Self-healing smart coatings (microcapsule-based repair).
 

 

 

 

 

 

 

 

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