Worldwide Customer Service Network
Licenes
ACL Specialid Gaskets Pty. Ltd. Brisbane, Australia
Tel: +61 73 268 0666
AGS Group Inc.
Edmonton, Alberta, Canada
岁寒松柏Tel: +1 780 466 5050
Arne Bo Pedern
Stavanger, Norway
Tel: +47 5185 9000
Automotive Components N.Z. Auckland, New Zealand
Tel: +64 98284119
Dragon Industrial Services Pembroke, UK
Tel: +441646 622200
Eriks BV.
Rotterdam, Netherlands
Tel: +31 72 514 1514
FMI Sima S.R.L.
Brescia, Italy
Tel: +39 030 7386 033
Goldcrest Engineering & Service Co. (GESCO)
Pataya, Chonburi, Thailand
Tel: +166 38 716 716
Henry Gallacher Ltd.
Stockton, Teesside UK
Tel: +44 1642 750111
Industrial Gasket & Supply Torrance, California,USA
Tel:+1310 5301771
Lake Charles Rubber
Lake Charles, Louisiana, USA
Tel: +1 337433 1002
Saudi Gasket Factory
Jeddah, Saudi Arabia
Tel: +996 2 665 2966
FLEXITALLIC GASKET DESIGN CRITERIA
Introduction
FLEXITALLIC, the world’s leading manufacturer and supplier of static als and the originator of the Spiral Wound Gasket, is committed to aling solutions for today’s industry. With greater emphasis than ever before placed on joint tightness, more atten-tion is focud toward variables associated with the integrity of the bolted gasketed joint. Flexitallic Gasket Design Criteria man-ual offers the engineer and end ur assistance in meeting the goal of providing fundamentally sound static aling practice.Developed and collated by Flexitallic’s worldwide team of engineers, this publication is the “engineer’s handbook” of static als technology.
Flexitallic has identified three factors which must be considered to achieve a leaktight joint
• Gasket Selection • Gasket Design • Gasket Installation
The Gasket
A gasket is a compressible material, or a combination of materials, which when clamped between two stationary members prevents the passage of the media across tho members.
The gasket material lected must be capable of aling mating surfaces, resistant to the medium being aled, and able to withstand the application temperatures and pressures.
How Does It Work?
A al is effected by the action of force upon the gasket surface. This force which com-press the gasket, caus it to flow into the flange macro and micro imperfections. The combination of contact stress, generated by the applied force between the gasket and the flange, and the densification of the gasket material, prevents the escape of the confined fluid from the asmbly.
摆摊创业Flange Imperfections
On ating, the gasket must be capable of overcoming the macro and micro imperfections.Macro def
ects are imperfections such as flange distortions, non-parallelism, scoring,troughs, while superficial imperfections such as minor scratches and minor scores are con-sidered micro imperfections.
Forces On The Gasket
In order to ensure the maintenance of the al throughout the life expectancy of the asm-bly, sufficient stress must remain on the gasket surface to prevent leakage. The residual bolt load on the gasket should at all times be greater than the hydrostatic end force acting against it.
The hydrostatic end force is the force produced by the internal pressure which acts to parate the flanges.
Considerations For Gasket Selections
Many factors should be considered when lecting a gasket to ensure its suitability for the intended application. Gasket properties as well as flange configuration and application details are part of the lection process.
Hydrostatic End Force
Blow Out Force
Gasket
against both the flange and the gasket.
SECTION I
Gasket Selection
Gaskets can be classified into three categories: soft cut, mi-metallic and metallic types.
The physical properties and performance of a gasket will vary extensively, depending on the type of gasket lected and the materials from which it is manufactured.
Physical properties are important factors when considering gasket design and the primary lection of a gasket type is bad on the following:
• Temperature of the media to be contained
• Pressure of the media to be contained
• Corrosive nature of the application
• Criticality of the application
Sheet materials are ud in low to medium pressure rvices. With careful lection the
gaskets are not only suitable for general rvice but also for extreme chemical rvices and
temperatures.
Types: Non-asbestos Fiber Sheets, PTFE, Biaxially Orientated Reinforced PTFE, Graphite,
Thermiculite, Insulating Gaskets.中国重大事件
The are composite gaskets consisting of both metallic and non-metallic materials. The
metal provides the strength and the resilience of the gasket and the non-metallic component
provides the conformable aling material. The gaskets are suitable for low and high pres-
sure and temperature applications. A wide range of materials is available.
抗生素名词解释Types: Spiral Wound Gaskets, Flexpro Gaskets (covered rrated metal core), Metal
Jacketed Gaskets, MRG’s (metal reinforced gaskets).
水煮鱼片用什么鱼The gaskets can be fabricated in a variety of shapes and sizes recommended for u in high
鸡的寓意
pressure/temperature applications. Except for weld ring gaskets, high loads are required to
at metallic gaskets, as they rely on the deformation or coining of the material into the
flange surfaces.
Types: Ring Type Joints, Lens Rings, Weld Rings, Solid Metal Gaskets.
Soft Cut
Semi-metallic
Metallic
Gasket Selection
Select aling material and metal type (when appropriate) on basis of rvice, temperature, and nature of medium.Soft cut gaskets should always be of the minimum thickness consistent with the state of the flanges to be aled, and compatible with the medium.
No
竭尽No
No Yes No
U Soft Cut
U SWG,Flexpro,MRG,Weld Ring,Thermiculite 815,or ST/RGS3
Critical Service
U SWG,Flexpro, or Weld Ring
U SWG,Flexpro, or Weld Ring
No
Critical Service
Yes
U LS,SWG,Flexpro,MRG, or Weld Ring
U RTJ
百合炒虾仁Yes Flange intended for RTJ type
Yes
RTJ type flange or > Class 600Yes
Service > Class 300
