Solid outer ring accurately locates the gasket on the flange face to give the additional radial. 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. Style aspcg spiral wound gaskets are ideal for high temperature and high pressure applications. Spiral wound gaskets must contain an appropriate filler between the winding for the application. Dimensions spiral wound gaskets according to en 15142 for.
The objective is to make available in india, spiral wound gaskets manufactured to the most exacting international standards such as api 601, asme b16. Spiral wound gasket, spiral gaskets, wound gaskets, swg gaskets. Style wri spiral wound gaskets swg are identical to style wr, with the addition of a solid steel inner ring. Spiral wound gaskets have the ability to recover under the action of fluctuating loads caused by process fluid pressure and temperature changes, flange face temperature variations, flange rotation, bolt stress relaxation and creep. The most common materials used for metallic strips are. Spiral wound gasket gasket description gasket cross section flange surface finish microinch ra flange surface finish micrometer ra spiral wound gasket 125 250 3. Spiral wound gaskets are used in refinery, petrochemical, chemical, steam lines and process industries, where they have many advantages over older types of gaskets. Image shows a spiral wound gasket with inner and outer ring.
Outer ring it is made of carbon steel and painted in order to avoid corrosion although it. The ls gaskets are intended to use in low pressure flanges where low bolting levels are present like for stainless steel bolts. Ptfe virgin white applications spiral wound gaskets are widely used in the petrochemical. Ring type joints, camprofile gaskets, mrg gaskets, spiral wound gaskets, metallic rings, semimetallic corrugated flange gaskets.
This makes it particularly suitable for low or fluctuating bolt loads. Wound gaskets are made and assembled in accordance with asme b16. Spiral wound gaskets the spiral wound gaskets are used to replace the plastic gaskets asbestosfree or graphite when their limits of application are exceeded. Associated gaskets can provide spiral wound gaskets in nominal thicknesses of 1. Iqs directory provides an extensive list of spiral wound gasket manufacturers and suppliers. Spiral wound gaskets flex gasket part numbers for 347ss windings graphite filler carbon steel outer ring 7635 ronson road san diego, california 92111 ph. The spiral wound gasket was developed in the early 20th century to meet the increasingly demanding conditions encountered in oil refinery operations. Data specification sheet novus spiral wound gaskets. Spiral wound gaskets are suitable for a wide range of operating conditions and can be adapted to suit almost all applications. Spiral wound gaskets with inner and outer supporting rings for welded flanges with raised face and specified via pn and class, data sheet 923925 edition. Gaskets is offering a full range of spiral wound gaskets. Dimensions are in millimeters unless otherwise indicated. The ls spiral wound gaskets are specially designed so that compression and sealing requirements are achieved under very low seating stress. Custom filler, winding strip, guide ring and inner ring materials are available upon request.
The inner ring provides radial support for the gasket on the id to help prevent buckling or imploding whilst also serving as an additional along with the outer ring compression limiter to prevent the spiral wound component from being overly crushed. The gaskets can seal fluid pressures up to 250 bar and temperature range of 200c to in excess of 450c. The aspcg style uses an 18 external ring which accurately centers the gasket on the flange face and provides additional radial strength to prevent gasket blowout and act as a compression stop. Please note this refers to the thickness of the windings and the filler, not any inner. Spiral wound gaskets spiral wound gaskets are designed for asme b16. The gasketsealing element consists of a preformed metallic winding strip with layers of a softer, more compressible sealing material which, during compression, is. Table of dimensions and tolerances of spiral wound gaskets. 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 available for classes 150 to 2500.
Spiral wound gaskets style 304 with outer ring metallic thickness standard thickness of the metallic strip is 0. Spiral wound gaskets spiral wound gaskets are made of a preformed thin metallic strip combined with a soft sealing composite material, wound together under pressure to energize the sealing element to act like a spring when compressed between two flange faces. Clearly stamped in either the outerinner ring is the size, materials constructed from, windings material and filler. The metal strip, in 304, or 316 stainless steel, holds the filler resulting in excellent mechanical resistance, resilience, and recovery. Spiral wound gaskets for rjtflanges for the replacement of oval or octagonal ring joint gaskets specifications we deliver according to the following standards. Spiral wound gaskets of nonstandard dimensions and shapes, and larger diameters are available on request. Dimensions of spiral wound gaskets according to en 15142 for use with din flanges en 10921. Tolerance outside diameter for nps 1 2 through nps 8 is 0. This process of precise winding density control provides a gasket designed to meet your specified seating stress and assures consistent sealing of your most critical fluids. The inner retaining ring increases the axial rigidity and resilience of the gasket.
This gasket are manufactured by winding of metallic strip, preformed v, alternated with inorganic fillers, can be made on specific standards asme, api, uni en or customers design. Spiral wound gaskets should always be in contact with the flange and should not protrude into the pipe or project from the flange. The metallic strip that holds the filler has a standardized thickness of 0. Gasket style comparison the following chart lists different manufacturers specific coding for spiral wound gasket styles. On the buckling of spiral wound gaskets request pdf. Heroos600 spiral wound gasket is formed of vshaped metallic strip and soft nonmetallic filler. 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 gasket cixi heroos sealing materials co. This type of gasket is commonly used with flange surface finishes created using mirage flange facing machines, which is why we decided to put together this simple. When looking for a high pressure and high temperature gasket sprial wound gaskets are the industries standard. The cg spiral wound is a good general purpose gasket and is suitable for use with flatface and raisedface flanges. Our spiral wound gaskets are made of a preformed metallic strip and a soft filler material ptfe, or flexible graphite, wound together under pressure. The spz spiral wound gasket can withstand severe operation conditions, as the ptfe sealing zone is protected by areas with graphite filler.
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. Because of the robust design of the spiral wound gasket, it is. The material for the metallic strip conforms to aisi 3043163221. A lowdensity spiral wound gasket is a better choice, where more filler material is wound within the sealing element, allowing the gasket to seal with less sealing stress. 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. Overview the many benefits of spiral wound gaskets can be identified in conventional and nuclearfired power plants, chemical and petrochemical plants, refineries, in apparatus and boiler construction, highpressure piping with flange connections, in the pulp and paper production as well as in aerospace applications.
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