This comprehensive guide addresses the specialized requirements of Nickel Aluminum Bronze (NAB) tubes in deep-sea mining equipment, focusing on extreme depth operations, harsh environmental conditions, and critical performance requirements. The guide covers C95800, C63200, and C95500 grades, with specific emphasis on ultra-deep water applications.
1. Deep-Sea Mining Operating Environment
1.1 Environmental Challenges
範圍
Typical Range
Impact on NAB Tubes
Design Consideration
Depth
1,000-6,000m
Extreme pressure
Enhanced wall thickness
溫度
2-4°C
Material brittleness
Low-temp toughness
Salinity
3.2-3.8%
Corrosion risk
Enhanced alloy selection
Hydrostatic Pressure
100-600 bar
結構完整性
壓力等級
Abrasive Environment
高的
耐磨性
Material hardness
1.2 Operational Requirements
Operation Type
壓力等級
溫度範圍
材料等級
Seafloor Collection
600 bar
2-15°C
C95500
Riser Systems
400 bar
2-20°C
C95800
Pump Systems
500 bar
2-40°C
C95500
Processing Equipment
300 bar
2-60°C
C63200
2. Material Specifications for Deep-Sea Applications
2.1 Enhanced Chemical Composition
元素
C95800(%)
C63200(%)
C95500(%)
Deep-Sea Significance
銅
79.0-82.0
81.0-83.0
78.0-82.0
Base stability
鋁
8.5-9.5
8.5-9.5
8.2-9.5
力量強化
鎳
4.0-5.0
4.0-4.8
3.0-5.5
耐腐蝕性能
鐵
3.5-4.5
3.5-4.3
3.5-4.5
Pressure resistance
錳
0.8-1.5
1.2-2.0
0.8-1.5
Deep-water durability
2.2 Mechanical Properties at Depth
財產
表面
1000m
3000m
6000m
測試標準
抗拉強度（兆帕）
第585章
595
610
625
ASTM E8
屈服強度（MPa）
270
280
290
300
ASTM E8
伸長率（%）
15
14
13
12
ASTM E8
衝擊強度（J）
34
32
30
28
ASTM E23
3. Equipment-Specific Applications
3.1 Seafloor Collection Systems
零件
材料等級
工作參數
特殊要求
Suction Pipes
C95500
600 bar, 2-10°C
耐磨性
Transport Lines
C95800
400 bar, 2-15°C
Flow optimization
液壓系統
C95500
500 bar, 2-40°C
壓力等級
Control Lines
C63200
300 bar, 2-20°C
Signal integrity
3.2 Vertical Transport Systems
System Type
Tube Specification
Flow Rate
Material Selection
Main Riser
300-500mm OD
1000-3000 m³/h
C95500
Return Lines
200-300mm OD
500-1500 m³/h
C95800
Auxiliary Lines
50-150mm OD
100-300 m³/h
C63200
Monitoring Lines
15-40mm OD
不適用
C63200
4. Design Considerations for Ultra-Deep Applications
4.1 Pressure Design Parameters
Depth Range (m)
Wall Thickness Factor
Safety Margin
Design Pressure
0-1000
1.0
1.5
150 bar
1000-3000
1.2
1.8
350 bar
3000-6000
1.5
2.0
650 bar
4.2 Material Selection Criteria
Criterion
C95800
C63200
C95500
Selection Factor
深度等級
4000m
3000m
6000m
Maximum depth
Pressure Resistance
非常好
好的
優秀的
Operating pressure
耐磨性
好的
公平的
優秀的
Abrasive content
Cost Efficiency
緩和
高的
低的
Budget constraints
5. Performance Testing and Qualification
5.1 Testing Requirements
測試類型
測試壓力
Duration
驗收標準
靜水壓
1.5 倍工作
24 hours
無洩漏
疲勞
10⁶ 週期
多變的
沒有失敗
影響
-40°C
標準
Energy absorption
Wear
1000 hours
連續的
Weight loss limit
5.2 Quality Control Measures
檢查點
方法
頻率
文檔
材料驗證
PMI
100%
測試證書
尺寸檢查
Laser scan
100%
檢驗報告
表面檢測
無損檢測
100%
NDT report
Pressure Test
靜水壓
100%
測試證書
6. Installation and Maintenance
6.1 Installation Requirements
範圍
規格
寬容
驗證方法
結盟
±0.5°
±0.1°
Laser alignment
共同準備
0.2mm gap
+0.1/-0mm
Gauge measurement
支撐間距
15x OD
±5%
Physical measurement
壓力測試
1.5 倍工作
+5%/-0%
Calibrated gauges
6.2 Maintenance Schedule
活動
頻率
方法
文檔
目視檢查
每月
ROV survey
檢驗報告
室壁厚度
季刊
超音波測量
調查報告
Pressure Test
每年
靜水壓
測試證書
Wear Analysis
Bi-annually
Physical/NDT
Analysis report
7. Life Cycle Management
7.1 Service Life Expectations
環境
Expected Life
Influencing Factors
Monitoring Method
Abrasive Slurry
5-7 years
Particle content
Wear monitoring
Clear Water
10-15 years
Flow velocity
Thickness monitoring
Static Service
15-20 years
Pressure cycles
壓力測試
控制系統
10-12 years
Signal integrity
Function testing
7.2 Cost Analysis
成本因素
C95800
C63200
C95500
考慮
初始投資成本
高的
緩和
很高
材料成本
安裝
標準
標準
標準
人工成本
維護
低的
中等的
非常低
Service cost
替代品
7-10 years
5-8 years
10-15 years
Life cycle
8. Regulatory Compliance
8.1 Certification Requirements
權威
證書類型
有效性
Renewal Process
DNV-GL
Deep-water cert
5年
Full inspection
ABS
Material approval
3年
文檔
勞合社
Equipment cert
每個項目
項目具體
應用程式介面
材料合規性
5年
重新認證
8.2 文件要求
文件類型
內容
更新頻率
儲存期限
Material Certs
特性
每批次
設備壽命
測試報告
表現
每次測試
10年
檢驗記錄
健康）狀況
每次檢查
5年
維護日誌
服務歷史
連續的
設備壽命
結論
Selection Guidelines:
C95500
Ultra-deep applications (>4000m)
High-pressure systems
Abrasive environments
C95800
Moderate depths (2000-4000m)
General service
Cost-effective solution
C63200
Shallow operations (<2000m)
Non-critical applications
Budget-conscious projects
Key Implementation Factors:
Depth requirements
Operating pressure
Abrasive content
維護方便性
成本考慮
Regulatory compliance
Best Practices:
Regular inspection schedule
預防性維護
Wear monitoring
Documentation management
Staff training
Emergency procedures
This guide serves as a comprehensive reference for engineers and technical professionals involved in deep-sea mining equipment specification and maintenance. Regular updates may be required based on operational experience and technological advances.
