行业组件数据 · 2026

垫片

A gasket is a mechanical seal that fills the space between two mating surfaces to prevent leakage under compression.

技术定义与适配语境
典型 垫片 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。

A gasket is a critical sealing component used in pressure vessel manway assemblies to create a tight, leak-proof seal between the manway cover and the vessel body. It deforms under bolt load to fill microscopic imperfections on flange surfaces, preventing fluid or gas escape under operating pressure and temperature conditions.

组件规格

定义
A gasket is a critical sealing component used in pressure vessel manway assemblies to create a tight, leak-proof seal between the manway cover and the vessel body. It deforms under bolt load to fill microscopic imperfections on flange surfaces, preventing fluid or gas escape under operating pressure and temperature conditions.
工作原理
The gasket works by being compressed between two flanges (manway cover and vessel body) when bolts are tightened. This compression causes the gasket material to flow into surface irregularities, creating a barrier that prevents leakage. The sealing action relies on sufficient compressive force to maintain contact stress higher than the internal pressure of the vessel.
材料
Common materials include compressed non-asbestos fiber (CNAF)graphitePTFE (Teflon)rubber (EPDMNitrile)and metal (stainless steelspiral wound). Material selection depends on temperaturepressureand media compatibility.
Thickness
1.5mm to 6mm
Inner Diameter
Matches manway opening
Outer Diameter
Flange face coverage
Compression Set
<20%
Pressure Rating
Up to 3000 psi
Tensile Strength
>10 MPa
Temperature Range
-50°C to 500°C
标准
ISO 7483DIN 2690ASME B16.21EN 1514

行业分类与别名

垫片 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

Insufficient bolt torque during installation->Inadequate sealing leading to leakage->Follow torque sequence and values per manufacturer specifications; use calibrated torque wrenches
Chemical incompatibility with process media->Gasket degradation and seal failure->Verify chemical resistance charts; select appropriate gasket material for specific media
Excessive temperature beyond material limits->Thermal degradation and loss of sealing properties->Select high-temperature rated materials (graphite, PTFE, metal); monitor operating conditions

工业生态与工程逻辑

0
Leakage due to improper installation
1
Chemical degradation
2
Compression set over time
3
Blow-out under overpressure conditions

合规与检测

tolerance
±0.5mm on dimensions; surface flatness within 0.1mm
test method
Helium leak test per ASTM E499; pressure testing per ASME BPVC Section VIII

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来自 CNFX 组件能力表的相关制造商资料。

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

How often should pressure vessel gaskets be replaced?

Gaskets should be replaced during every manway opening or if visual inspection shows signs of compression set, cracking, or chemical degradation. Preventive replacement is recommended during scheduled maintenance.

What factors determine gasket material selection?

Key factors include operating temperature, pressure, chemical compatibility with process media, flange surface finish, and required sealing performance (e.g., fugitive emissions control).

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CNFX Industrial Component Index · 机械和设备制造

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