The objective is to make available in india, spiral wound gaskets manufactured to the most exacting international standards such as api 601, asme b16. Online you can buy several products, such as from various top brands of india. It is normally made of the same material as the gasket metallic strip. 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. 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. Weld neck flange dimensions are covered in asme b16.
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. Required gasket compression for spiral wound gaskets spiral wound gaskets with internal or external rings, i. Inner rings are recommended for all graphite filled gaskets, required for all ptfe filled gaskets. Style r3 indicates gaskets for used with small tongue and groove flanges. Spiral wound gaskets must contain an appropriate filler between the winding for the application. 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. There are three types of sw600r spiral wound gaskets. Data specification sheet novus spiral wound gaskets properties spiral wound gaskets are suitable for use across a wide gasket stress range. Style wrihtg gaskets combine the corrosion and oxidation. Solid outer ring accurately locates the gasket on the flange face to give the additional radial. 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.
This limitations are general and can vary according to the. Spiral wound gaskets can be used to seal fluid pressures up to 250 bar and from cryogenic temperatures up to elevated tem. The gasket dimensions will typically match the tongue dimensions. Type swio spiral wound gasket with centring ring and inner ring. Weld neck flange dimensions class 150 to class 2500. When looking for a high pressure and high temperature gasket sprial wound gaskets are the industries standard. Gaskets is offering a full range of spiral wound gaskets. Table of dimensions and tolerances of spiral wound gaskets. Tolerance outside diameter for nps 12 through nps 8 is 0. Dimensions of spiral wound gaskets class 150, asme b16. Forgasketswitha diameternosuperiorto1200mmthethicknessof4,5 mmisrecommended. 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. Type swi spiral wound gasket with inner support ring.
Style r1 indicates gaskets for use with large male and female flanges. When flexitallic invented the spiral wound gasket in 1912, there was nothing like it. Styles cg and cgi can be compressed to the ring thickness, if necessary. Flexitallic is actually a manufacturer of spiral wound gaskets. The vitaflex and flexseal spiralwound gaskets have passed the fire test according to specification api6fb. 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. Inward buckling of spiral wound gaskets has been identified as a potential problem.
Ring type joints, camprofile gaskets, mrg gaskets, spiral wound gaskets, metallic rings, semimetallic corrugated flange gaskets. Theusualnominalthicknessofspiralwoundgasketsarebetween3,2 mmand4,5mm. The cg spiral wound is a good general purpose gasket and is suitable for. Gaskets basics, types, working principle, calculation of. Spiral wound gaskets of nonstandard dimensions and shapes, and larger diameters are available on request. At the start and conclusion of the spiral form, several continuous turns of the metallic windings are securely welded together. Because of the robust design of the spiral wound gasket, it is. 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. The primary purpose for this development was the increasingly severe temperatures and pressures used by u.
Dims spiral wound gaskets en 15142 for flanges according to din en 10921. The necessity for a gasket to have the ability to recover cannot be over emphasized. 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. Technical catalogue spiral wound gaskets comdiflex. On the buckling of spiral wound gaskets request pdf. 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. Spiral wound graphite gaskets will tolerate certain irregularities and flange or sealing face deformations more than most other gasket types. Flange dimension charts for class 150, class 300, class 600, class 900, class 1500 and class 2500 free.
Dimensions spiral wound gaskets according to en 15142 for. They are also often used in pump applications with recessed flanges. Dimensions are in millimeters unless otherwise indicated. 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. Describes a spiral wound gasket with an outer ring, but no inner ring, i. This will not damage the gasket or affect the sealing performance and the ring is provided as a compression limiting stop.
Spiral wound gaskets are used in refinery, petrochemical, chemical, steam lines and process industries, where they have many advantages over older types of gaskets. Flexitallic gasket broad term sometimes used to describe nearly any type of spiral wound gasket. More information on reverse spiral wound gaskets are suitable for use across a wide gasket stress range. For gaskets with a diameter no superior to 1200 mm the thickness of 4,5 mm is.
Introducing the spiral wound gasket that reinvents the category. Dimensions of spiral wound gaskets according to en 15142 for use with din flanges en 10921. Based on astm a193 b7 bolting or equal yield strength bolt material. 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. This publication is designed to facilitate the specification and ordering of standard flexitallic spiral wound gaskets. Spiral wound gasket dimensions for use on screwed or slipon flanges. Image shows a spiral wound gasket with inner and outer ring. 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. The change gasket design combines aspects of both a traditional spiral wound gasket and a kammprofile, improving upon both using.
Data specification sheet novus spiral wound gaskets. 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. As a general rule, the use of flexitallic spiral wound gaskets with small male and female flange facings is not recommended. 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. Spiral wound gaskets flexitallic pdf catalogs technical. The usual nominal thickness of spiral wound gaskets are between 3,2 mm and 4,5 mm. Figure swg flange gaskets spiral wound gaskets suggested torque values ft. Spiral wound gaskets spiral wounds are available in a fill range of styles and material and are manufactured in accordance with asme b16. Spiral wound gaskets flexitallic metal gaskets sealing.
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