Nickel Aluminum Bronze (NAB) tubes play a crucial role in petrochemical processing facilities, offering exceptional resistance to corrosive chemicals, high temperatures, and demanding operating conditions. This guide focuses on the practical applications of C95800, C63200, and C95500 grades in petrochemical environments, addressing specific requirements for refineries, chemical processing plants, and related facilities.
Key Application Areas in Petrochemical Industry
The petrochemical industry presents unique challenges for tube materials:
Exposure to diverse chemical environments
High temperature and pressure conditions
Continuous operation requirements
Critical safety considerations
Strict regulatory compliance needs
1. Chemical Process Applications
Process Type
Operating Conditions
Recommended Grade
Key Requirements
Catalytic Cracking
300-550°C, High pressure
f
Heat resistance
Hydroprocessing
350-425°C, H₂ environment
C95800
H₂ embrittlement resistance
Alkylation
10-50°C, HF/H₂SO₄
C95800
Acid resistance
Steam Reforming
450-950°C
C95500
High temperature strength
2. Service Environment Compatibility
Chemical Environment
C95800
C63200
C95500
Maximum Temperature
Sulfuric Acid (<50%)
Excellent
Good
Excellent
80°C
Hydrochloric Acid (<20%)
Good
Fair
Good
60°C
Caustic Soda
Excellent
Very Good
Excellent
90°C
Chlorides
Very Good
Good
Very Good
120°C
Hydrocarbons
Excellent
Excellent
Excellent
350°C
3. Heat Exchanger Applications
Service Type
Temperature Range
Pressure Range
Recommended Grade
Shell & Tube
Up to 300°C
Up to 40 bar
C95800
Plate Heat Exchangers
Up to 200°C
Up to 25 bar
C63200
Air Coolers
Up to 150°C
Up to 20 bar
C63200
Process Coolers
Up to 350°C
Up to 50 bar
C95500
4. Dimensional Standards for Process Equipment
Nominal Size (mm)
Wall Thickness (mm)
Tolerance (mm)
Application
15-50
1.5-3.0
±0.15
Instrumentation
50-100
3.0-5.0
±0.20
Process lines
100-200
5.0-8.0
±0.25
Main headers
200-300
8.0-12.0
±0.30
Major equipment
5. Pressure Ratings and Temperature Limits
Grade
Maximum Pressure (bar)
Temperature Limit (°C)
Safety Factor
C95800
100
315
1.5
C63200
85
260
1.5
C95500
120
370
1.5
6. Corrosion Performance in Process Environments
Environment
Corrosion Rate (mm/year)
Maximum Velocity (m/s)
pH Range
Process Water
0.025
15.2
6-9
Steam Condensate
0.038
12.2
7-9
Cooling Water
0.051
13.7
6-8
Chemical Solutions
0.076
10.5
4-10
7. Installation and Maintenance Requirements
Parameter
Specification
Inspection Frequency
Standard Reference
Support Spacing
20-40x OD
Annual
ASME B31.3
Flange Torque
Grade-specific
6 months
ASME PCC-1
NDT Requirements
As per service
2 years
ASME BPVC
Pressure Testing
1.5x design
Post-installation
API 570
8. Quality Control Requirements
Test Type
Method
Frequency
Acceptance Criteria
Chemical Analysis
Spectrometry
Each heat
Grade specifications
Mechanical Testing
Tensile/Hardness
Per lot
ASTM requirements
Dimensional
Precision measurement
100%
Drawing tolerance
Surface Inspection
Visual/NDT
100%
No defects
9. Cost-Benefit Analysis
Factor
C95800
C63200
C95500
Consideration
Initial Cost
High
Moderate
Very High
Material cost
Installation
Standard
Standard
Standard
Labor cost
Maintenance
Low
Medium
Low
Long-term cost
Service Life
20+ years
15+ years
25+ years
With maintenance
10. Application-Specific Selection Guide
Application
Primary Choice
Alternative
Selection Criteria
Process Heat Exchangers
C95800
C95500
Temperature resistance
Chemical Transfer
C95500
C95800
Chemical compatibility
Utility Systems
C63200
C95800
Cost-effectiveness
High-Pressure Service
C95500
C95800
Pressure rating
Selection Guidelines
Process Considerations
Operating temperature and pressure
Chemical environment
Flow characteristics
Service life requirements
Material Selection Priorities
Chemical compatibility
Temperature resistance
Pressure rating
Cost considerations
Installation Requirements
Welding procedures
Support systems
Testing protocols
Quality control measures
Maintenance Considerations
Inspection frequency
Cleaning requirements
Replacement strategy
Monitoring systems
Quality Assurance Requirements
Requirement
Specification
Verification Method
Documentation
Material Certification
Mill cert
PMI testing
Material records
Dimensional Control
ISO standards
Measurement
QC reports
Surface Finish
Ra ≤ 3.2 μm
Profilometer
Inspection records
Pressure Rating
Design pressure
Hydrostatic test
Test certificates
Conclusion
Selection Recommendations:
C95800: Best for general chemical service and heat exchangers
C63200: Economical choice for utility systems
C95500: Optimal for high-temperature and high-pressure applications
Critical Success Factors:
Proper material selection based on service conditions
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