Type swio spiral wound gasket with centring ring and inner ring. Dimensions spiral wound gaskets according to en 15142 for. Gaskets basics, types, working principle, calculation of. Spiral wound graphite gaskets will tolerate certain irregularities and flange or sealing face deformations more than most other gasket types. Describes a spiral wound gasket with an outer ring, but no inner ring, i. Referring to the title failure analysis of pipe joint gaskets spiral wound, this gasket is suitable for use in piping systems spiral wound gasket designs are typically used in flat faced pipe flanges. For gaskets with a diameter no superior to 1200 mm the thickness of 4,5 mm is. Spiral wound gaskets flexitallic pdf catalogs technical. Online you can buy several products, such as from various top brands of india. Style wrihtg gaskets combine the corrosion and oxidation. Dimensions are in millimeters unless otherwise indicated. Technical catalogue spiral wound gaskets comdiflex.
Spiral wound gaskets first and foremost the concept of spiral wound gasket construction was originated by flexitallic in 1912, starting a new era in safe, effective sealing. Profiles type sw spiral wound gasket without inner and outer ring for force shunt and groove and spring applications. Style r2 indicates gaskets for use with large tongue and groove flanges. Ring type joints, camprofile gaskets, mrg gaskets, spiral wound gaskets, metallic rings, semimetallic corrugated flange gaskets. Table 22 recommended torque cg spiral wound gaskets 33 table 23 recommended torque cgi spiral wound gaskets 34 table 24 bolting data for asme b16. On the buckling of spiral wound gaskets request pdf. Solid outer ring accurately locates the gasket on the flange face to give the additional radial. Data specification sheet novus spiral wound gaskets properties spiral wound gaskets are suitable for use across a wide gasket stress range. Spiral wound gaskets are used in refinery, petrochemical, chemical, steam lines and process industries, where they have many advantages over older types of gaskets. Tolerance outside diameter for nps 12 through nps 8 is 0. More information on reverse spiral wound gaskets are suitable for use across a wide gasket stress range. Type swi spiral wound gasket with inner support ring.
Flexitallic is actually a manufacturer of spiral wound gaskets. When flexitallic invented the spiral wound gasket in 1912, there was nothing like it. Spiral wound gaskets flexitallic metal gaskets sealing. It is normally made of the same material as the gasket metallic strip. Most gaskets are used in bolted joints and experience has shown that the pressure is the greatest close to bolts, and the least pressure is midway between. The buckling of spiral wound gaskets swgs causes turbulence of the fluid flow inside flanges and may result in leakage failure over time due to the unwinding of the spirals. The effects of pressure and temperature fluctuations, the temperature differential across the flange face, together with bolt stress relaxation and creep, demand a gasket with adequate flexibility and recovery to maintain a seal even under these varying service conditions. Table of dimensions and tolerances of spiral wound gaskets. Required gasket compression for spiral wound gaskets spiral wound gaskets with internal or external rings, i. Spiral wound gaskets of nonstandard dimensions and shapes, and larger diameters are available on request. They are also often used in pump applications with recessed flanges. The vitaflex and flexseal spiralwound gaskets have passed the fire test according to specification api6fb. Gaskets many factors must be considered when choosing the proper gasket vast, infield experience with live for an application including safety, temperature, pressure, the media to be sealed, equipment conditions, versatility of the product, and cost.
Style w spiral wound gasket tolerances 8 dimensions for style w to suit lar ge and small tongue and groove joints double colour coding for spiral wound gaskets as per asme b16. Theusualnominalthicknessofspiralwoundgasketsarebetween3,2 mmand4,5mm. Figure swg flange gaskets spiral wound gaskets suggested torque values ft. Style r1 indicates gaskets for use with large male and female flanges. Forgasketswitha diameternosuperiorto1200mmthethicknessof4,5 mmisrecommended.
Dimensions of spiral wound gaskets class 150, asme b16. The necessity for a gasket to have the ability to recover cannot be over emphasized. Weld neck flange dimensions are covered in asme b16. Inner rings are recommended for all graphite filled gaskets, required for all ptfe filled gaskets. Spiral wound gaskets must contain an appropriate filler between the winding for the application. Gaskets is offering a full range of spiral wound gaskets. When looking for a high pressure and high temperature gasket sprial wound gaskets are the industries standard. The objective is to make available in india, spiral wound gaskets manufactured to the most exacting international standards such as api 601, asme b16. The cg spiral wound is a good general purpose gasket and is suitable for.
Style r3 indicates gaskets for used with small tongue and groove flanges. Spiral wound gaskets spiral wounds are available in a fill range of styles and material and are manufactured in accordance with asme b16. At the start and conclusion of the spiral form, several continuous turns of the metallic windings are securely welded together. Spiral wound gaskets patented one hundred years ago in 1912, the spiral wound gasket is the most frequently used gasket for high temperature, high pressure service. Weld neck flange dimensions class 150 to class 2500. Inward buckling of spiral wound gaskets has been identified as a potential problem. There are three types of sw600r spiral wound gaskets. The spiral wound gasket with center ring is for use w ith flat face and raised face flanges, this gasket features increased compressive force for. Styles cg and cgi can be compressed to the ring thickness, if necessary. Flange dimension charts for class 150, class 300, class 600, class 900, class 1500 and class 2500 free. Dimensions of spiral wound gaskets according to en 15142 for use with din flanges en 10921. Whether you need a simple winding, or if you need inner and outer rings, advanced sealing can fill your needs with the latest in materials and design technology.
Dimensional limitations established by the proportions of the small tongue and groove facings limit the possibility of increasing gasket dimensions to improve the load carrying capacity in the higher pressure series. Flexitallic gasket broad term sometimes used to describe nearly any type of spiral wound gasket. This will not damage the gasket or affect the sealing performance and the ring is provided as a compression limiting stop. Introducing the spiral wound gasket that reinvents the category.
Style cg spiral wound gaskets utilize an external ring which accurately centers the gasket on flange faces, and provides radial strength to prevent gasket blowout as well as a compression stop. Based on astm a193 b7 bolting or equal yield strength bolt material. Because of the robust design of the spiral wound gasket, it is. This limitations are general and can vary according to the. The primary purpose for this development was the increasingly severe temperatures and pressures used by u. Spiral wound gasket dimensions for use on screwed or slipon flanges. Our standard production program comprises a range of spiral wound gaskets with inner diameters of 10 mm to 3000 mm and a nominal thickness of 3. This publication is designed to facilitate the specification and ordering of standard flexitallic spiral wound gaskets. Spiral wound gaskets can be used to seal fluid pressures up to 250 bar and from cryogenic temperatures up to elevated tem.
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