소개

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 TypeOperating Conditions추천등급Key Requirements
Catalytic Cracking300-550°C, High pressuref내열성
Hydroprocessing350-425°C, H₂ environmentC95800H₂ embrittlement resistance
Alkylation10-50°C, HF/H₂SO₄C95800Acid resistance
Steam Reforming450-950°CC95500High temperature strength

2. Service Environment Compatibility

Chemical EnvironmentC95800C63200C95500최대 온도
Sulfuric Acid (<50%)훌륭한좋은훌륭한80°C
Hydrochloric Acid (<20%)좋은공정한좋은60°C
Caustic Soda훌륭한매우 좋은훌륭한90°C
Chlorides매우 좋은좋은매우 좋은120°C
Hydrocarbons훌륭한훌륭한훌륭한350°C

3. Heat Exchanger Applications

서비스 유형온도 범위Pressure Range추천등급
Shell & TubeUp to 300°C최대 40바C95800
Plate Heat ExchangersUp to 200°CUp to 25 barC63200
Air CoolersUp to 150°C최대 20바C63200
Process CoolersUp to 350°CUp to 50 barC95500

4. Dimensional Standards for Process Equipment

Nominal Size (mm)벽 두께(mm)Tolerance (mm)애플리케이션
15-501.5-3.0±0.15Instrumentation
50-1003.0-5.0±0.20Process lines
100-2005.0-8.0±0.25Main headers
200-3008.0-12.0충격 시험이 없는 수단Major equipment

5. Pressure Ratings and Temperature Limits

등급Maximum Pressure (bar)Temperature Limit (°C)Safety Factor
C958001003151.5
C63200852601.5
C955001203701.5

6. Corrosion Performance in Process Environments

환경Corrosion Rate (mm/year)Maximum Velocity (m/s)pH 범위
Process Water0.02515.26-9
Steam Condensate0.03812.27-9
Cooling Water0.05113.76-8
Chemical Solutions0.07610.54-10

7. Installation and Maintenance Requirements

매개변수사양Inspection FrequencyStandard Reference
Support Spacing20-40x ODAnnualASME B31.3
Flange TorqueGrade-specific6개월ASME PCC-1
NDT RequirementsAs per service2 yearsASME BPVC
압력 테스트1.5x designPost-installationAPI 570

8. Quality Control Requirements

테스트 유형방법빈도Acceptance Criteria
화학 분석SpectrometryEach heatGrade specifications
기계적 테스트Tensile/HardnessPer lotASTM requirements
DimensionalPrecision measurement100%Drawing tolerance
Surface InspectionVisual/NDT100%No defects

9. Cost-Benefit Analysis

요인C95800C63200C95500고려 사항
초기비용높은보통의매우 높음Material cost
설치기준기준기준Labor cost
유지낮은중간낮은Long-term cost
Service Life20+ years15+ years25+ yearsWith maintenance

10. Application-Specific Selection Guide

애플리케이션Primary ChoiceAlternativeSelection Criteria
Process Heat ExchangersC95800C95500Temperature resistance
Chemical TransferC95500C95800Chemical compatibility
Utility SystemsC63200C95800Cost-effectiveness
High-Pressure ServiceC95500C95800Pressure rating

선택 지침

  1. Process Considerations
  • Operating temperature and pressure
  • Chemical environment
  • Flow characteristics
  • Service life requirements
  1. Material Selection Priorities
  • Chemical compatibility
  • Temperature resistance
  • Pressure rating
  • Cost considerations
  1. Installation Requirements
  • Welding procedures
  • Support systems
  • Testing protocols
  • Quality control measures
  1. 유지 관리 고려 사항
  • Inspection frequency
  • Cleaning requirements
  • Replacement strategy
  • Monitoring systems

Quality Assurance Requirements

요구 사항사양Verification Method선적 서류 비치
Material CertificationMill certPMI testingMaterial records
Dimensional ControlISO standardsMeasurementQC reports
표면 마감Ra ≤ 3.2 μmProfilometerInspection records
Pressure RatingDesign pressureHydrostatic testTest certificates

결론

Selection Recommendations:

  1. C95800: Best for general chemical service and heat exchangers
  2. C63200: Economical choice for utility systems
  3. C95500: Optimal for high-temperature and high-pressure applications

Critical Success Factors:

  • Proper material selection based on service conditions
  • Adherence to installation standards
  • Regular maintenance and inspection
  • Documentation and quality control
  • Compliance with industry standards