其次，法兰垫片已被密封环所代替，以确保密封面对密封面的匹配。
Secondly, the flange gasket sealing ring has been replaced to ensure that the sealing face of sealing surface of the match.
大型法兰垫片是一种能产生塑性变形，并有一定强度的材料制成的戒指。
The large flange gasket is a ring which can produce plastic deformation and has a certain strength.
ANSI法兰的密封原理极其简单：螺栓的两个密封面相互挤压法兰垫片并形成密封。
ANSI flange sealing principle is very simple: bolt two seal face mutual extruding flange gaskets and formed the seal.
ANSI法兰的密封原理极其简单：螺栓的两个密封面相互挤压法兰垫片并形成密封。
ANSI flange sealing principle is extremely simple: the two bolts each other extrusion flange sealing surface and form a seal gasket.
法兰形式不同，要求使用的垫片也不同。
Flange form different requirements, the use of gasket are different.
根据国内垫片标准规定的泄漏率指标和美国PVRC对连接系统划分的紧密度等级，尝试定义了法兰连接系统的安全性等级。
An attempt was made to define the safety grade of flanged connections according to target leakage rates described in domestic gasket standards and tightness rates of joints stated in PVRC of ASME.
对软质垫片，法兰面过于光滑反而不利，因为此时发生界面泄露阻力变小了。
To soft gaskets, flange surface too smooth adverse instead, because right now happened resistance smaller.
在这种场合，金属垫片也不适用，因为这时要求的压紧力过大，导致螺栓较大的变形，使法兰不易封严。
In such cases, a metal gasket also not applicable, because the requirements of the compaction force is too large, caused the bolts, make much deformation flange is not easy to seal.
所以，垫片不同，所要求的法兰表面粗糙度也不相同。
Interface leak So, gaskets are different, the requirements of the flange surface roughness is not the same.
而且，从根本上来说，ANSI法兰是壹种无效的密封，它需要把50%的螺栓负荷用于挤压垫片，而用于保持压力的负荷只剩50%。
And, essentially, is one kind of invalid ANSI flange sealed, it needs to put 50% of the bolt load for dummy blocks, and to be used for pressure load of only 50%.
法兰表面粗糙度对密封效果影响很大，特别是当采用非软质垫片时，密封表面粗糙的度值大是造成泄露的主要原因之一。
Flange surface roughness of the influence, especially sealing effect when using the soft cushion, seal surface coarse degree value big are caused by the leak is one of the main reasons why.
介绍了管法兰金属包覆垫片的特点、应用以及国家标准的制订依据与主要内容等。
Features and application relating to metal cladding gasket for pipe flanges are introduced, at the same time, basis and main contents to formulate its national standard is presented, too.
本阀可水平安装或垂直安装，安装时两法兰联接中间必须加密封垫片，然后均匀锁紧螺栓。
The valve can be installed in horizontal or vertical. Add seal cushion between two flanges connection and screw down bolt.
安装带法兰的管路时，必须在两个对接法兰的密封间放置垫片。
When installing the pipeline with flange, the gasket must be placed between the two butt flanges.
在最终热处理后翼缘法兰的垫片的端面应进行加工。
The gasket faces of girth flanges shall be machined after final heat treatment.
采用密封设计准则，通过试验确定了金属缠绕式垫片的垫片系数，在此基础上，按照PVRC新方法对法兰螺栓载荷进行了计算。
The sealing design criteria to measure the factors of spiral wound gasket were adopted, based on this bolt loads of flange can be determined by using the new PVRC method.
分析了法兰密封的影响因素，介绍了常用垫片的基本性能。对垫片的选用提出了一些看法。
Factors affecting flange sealing have been analyzed. Basic performance of common gasket is expounded and Suggestions for gasket selection have been proposed.
为使法兰连接保持良好的垫片固定密封。
通过垫片工艺结构的调整，使其力学性能与紧固件的要求一致，使法兰接头符合操作时的密封性。
Through adjusting gasket structure, its mechanical performance is changed to consist with request of bolt, so that flange joints can meet the standard of sealing request.
通过对重油催化裂化装置中法兰泄漏原因的分析，提出了处理方法：将原石棉密封垫片改为波齿复合密封垫片。
By analyzing for the flange leakage on a heavy oil catalytic pyrolysis unit, the writer put forward a treatment method, i. e. to replace old asbestos gasket with a compound corrugated gasket.
安装时请注意阀体上标注介质流向，两法兰连接时必需加密封垫片，然后均匀锁紧螺栓。
When installation, note flow direction of media of valve body. When connecting two flanges, add sealing mat. Then lock the bolt evenly.
我厂专业生产紫铜垫片，选用优质紫铜板材加工而成，主要用于高温、高压的管道法兰密封。
Our factory specializing in the production of copper gaskets, select high-quality copper plate processing and become, mainly used in high temperature and high pressure pipe flanges seal.
在这种场合，金属垫片也不适用，因为这时要求的压紧力过大，导致螺栓较大的变形，使法兰不易封严。
In such cases, the metal gasket does not apply, because then the pressing force required is too large, resulting in greater deformation of bolts, so difficult to seal flange.
本阀可水平安装或垂直安装，安装时两法兰连接中间必须加密封垫片，然后锁紧螺栓。
It can be installed in horizontal or vertical. Sealing gasket must be put on the connected, then equably tight the bolt.
经过计算分析，法兰泄漏的主要原因是垫片宽度不够。
The calculation and analysis showed that the main reason for the flange leakage resulted from the inadequate width of the gasket.
严禁装上阀门后施焊法兰·法兰两边加石棉垫片。
Forbid welding the flange after installing the valve. Both sides of the flange should be added the asbestos gasket.
安装时请注意阀体上标注介质流向，两法兰连接时必需加密封垫片，然后均匀锁紧螺栓。
Pay attention to the direction of medium in valve body. Add seal cushion between two flanges connection and screw down bolt.
在试验基础上分析得到了此种垫片的密封性能曲线和相应的公式，研究结果对垫片选用和法兰密封设计具有重要参考价值。
Based on the experiment, we attained the sealing experimental curve and equation. These results are the important reference of this gasket for its choice and design of bolted flanged connection.
不锈钢法兰形式不同，要求使用的垫片也不同。
Different flange form, requires the use of gaskets are also different.
输气管道站场各种工艺管道常用的机械连接方式是法兰连接。法兰连接是由一组法兰、螺栓、螺母和垫片所构成的连接系统。
In long - distance gas pipelines, the normal mechanical connection of process pipelines is flange connection, which consists of flange, bolts, nuts and gaskets.
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