行业组件数据 · 2026

管板

Tube sheets are critical structural components in steam generators that support and secure heat exchanger tubes within tube bundles.

技术定义与适配语境
典型 管板 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

Tube sheets are thick, perforated plates used in steam generator tube bundle assemblies to mechanically secure the ends of heat exchanger tubes. They provide structural integrity, maintain tube alignment, create sealed boundaries between fluid channels (typically separating primary and secondary circuits), and facilitate tube expansion/contraction during thermal cycling. These components are precision-engineered to withstand high pressure differentials, thermal stresses, and corrosive environments while maintaining leak-tight seals.

组件规格

定义
Tube sheets are thick, perforated plates used in steam generator tube bundle assemblies to mechanically secure the ends of heat exchanger tubes. They provide structural integrity, maintain tube alignment, create sealed boundaries between fluid channels (typically separating primary and secondary circuits), and facilitate tube expansion/contraction during thermal cycling. These components are precision-engineered to withstand high pressure differentials, thermal stresses, and corrosive environments while maintaining leak-tight seals.
工作原理
Tube sheets function by providing a rigid mounting surface where tubes are inserted through precisely drilled holes and secured via rolling, welding, or mechanical expansion. They create separate compartments for different fluid streams while transferring thermal energy through the tube walls. The tube sheet's thickness and material properties distribute mechanical loads, prevent tube vibration, and maintain pressure boundaries between the shell side and tube side of the heat exchanger.
材料
Carbon steel (SA-516 Gr.70)stainless steel (SA-240 Type 304/316)alloy steels (SA-387 Gr.11/22)clad materials (carbon steel with stainless steel overlay)nickel alloys (Inconel 600/690)titanium grades. Material selection depends on temperaturepressureand corrosion requirements.
Flatness
0.1 mm/m
Thickness
50-300 mm
Surface Finish
Ra 3.2 μm
Pressure Rating
Up to 2500 psi
Temperature Range
-50°C to 400°C
Hole Pattern Accuracy
±0.1 mm
Hole Diameter Tolerance
±0.05 mm
标准
ISO 9001ASME BPVC Section VIIITEMA StandardsEN 13445ASME SA-20

行业分类与别名

管板 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Inadequate tube expansion or welding->Tube joint leakage leading to fluid mixing->Implement strict quality control on tube rolling procedures, use automated expansion equipment, perform helium leak testing, and apply proper weld procedures
Thermal cycling stress->Fatigue cracking in tube sheet or tube joints->Design with proper thermal stress analysis, use flexible tube supports, implement controlled startup/shutdown procedures, and select materials with good fatigue resistance
Corrosive fluid exposure->Pitting or crevice corrosion at tube holes->Select corrosion-resistant materials, apply protective coatings, maintain proper water chemistry control, and implement regular inspection programs

工业生态与工程逻辑

0
Stress corrosion cracking
1
Tube-to-tube sheet joint leakage
2
Thermal fatigue failure
3
Differential expansion damage
4
Erosion-corrosion at tube holes
5
Galvanic corrosion in mixed-material assemblies

合规与检测

tolerance
Hole diameter: H7 tolerance, Hole pattern: ±0.1 mm positional accuracy, Flatness: 0.1 mm per meter, Surface roughness: Ra 3.2 μm maximum
test method
Ultrasonic testing (UT) for material integrity, Dye penetrant testing (PT) for surface defects, Helium leak testing for joint integrity, Dimensional verification with CMM, Hydrostatic pressure testing per ASME requirements

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制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of a tube sheet in steam generators?

The tube sheet serves as a structural plate that secures heat exchanger tubes, maintains tube alignment, creates sealed boundaries between fluid circuits, and withstands pressure differentials and thermal stresses during operation.

How are tubes typically attached to tube sheets?

Tubes are secured through tube rolling (mechanical expansion), welding (seal welding or strength welding), or a combination of both methods to ensure leak-tight joints that can accommodate thermal expansion.

What materials are commonly used for tube sheets in corrosive environments?

Stainless steel (304/316), nickel alloys (Inconel), titanium, or clad materials with corrosion-resistant overlays are used when operating with aggressive fluids or high-temperature conditions.

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CNFX Industrial Component Index · 机械和设备制造

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