Asbestos Free Fibre Jointing Sheets
RANGE OF SPITMAAN COMPRESSED NON- ASBESTOS FIBER JOINTING SHEETS:
Abbreviations:
a) ZA General suitability using common installation practices under conditions of chemical compatibility.
b) ZB Maximum performance is ensured through appropriate measures for joint designs and gasket installations. Consultation is recommended.
c) ZC Limited application area. Consultation is mandatory.
Pressure temperature charts are the most current methods of determining the suitability of a gasket material in known applications. Maximum figures for temperature and pressure can be misleading. Max. Temperature and Max. Pressure represents maximum values and shall not be used simultaneously. They are given only for guidance, since these max. values depend not only on the gasket material but also on the assembly conditions. Use the Pressure and the Temperature Graphs to check suitability of the chosen gasket materials for your applications.
Spitmaan Style AF 111 |
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Description: |
A cost effective Non- Asbestos Jointings manufactured from ecofriendly natural cellulose fibres & fillers bonded with suitable mix of NBR Elastomers. |
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Suitable Industries/Properties: |
General purpose Gasketing (Low service conditions). |
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Suitable Media: |
Oils, Solvents, Gases, Water, LP Steam, Dilute Acids & Alkalies. |
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Identity Colour: |
Red & Green with Standard Antistick Coating. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Short Term Temperature |
300 ºC |
350 ºC |
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Continuous Service Temperature |
200 ºC |
225 ºC |
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Max. Continous Temperature with steam |
180 ºC |
200 ºC |
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Pressure |
35 bar |
45 bar |
Spitmaan Style AF 120 |
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Description: |
These Jointings are manufactured from Synthetic Aramid Fibres and Fillers bonded with NBR Elastomers. |
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Suitable Industries/Properties: |
Suitable for use with Water, Medium Pressure Steam, Gas Supplies, Pumps, Radiators & various Light Industrial Applications. (Medium Service Conditions) |
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Suitable Media: |
Water, Steam, Gas Supplies, Pumps, Dilute Acids and Alkalies. |
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Identity Colour: |
Green with Standard Antistick Coating. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
|
Short Term Temperature |
350 ºC |
350 ºC |
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Continuous Service Temperature |
225 ºC |
250 ºC |
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Max. Continous Temperature with steam |
200 ºC |
200 ºC |
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Pressure |
80 bar |
90 bar |
Spitmaan Style AF 139 |
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Description: |
These are High Quality Jointings manufactured from Synthetic Aramid Fibres and Fillers bonded with NBR Elastomers. |
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Suitable Industries/Properties: |
Suitable for use with Oils, Petrochemicals, Steam Supplies, Automobiles, Ship Building & General Purposes. (Medium Service Conditions) |
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Suitable Media: |
Applications involving Oils, Hydrocarbons, Steam, Gases, Solvents, Glycols & Aqueous Solutions. |
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Identity Colour: |
Orange with Standard Antistick Coating. Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Short Term Temperature |
375 ºC |
400 ºC |
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Continuous Service Temperature |
250 ºC |
250 ºC |
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Max. Continous Temperature with steam |
225 ºC |
250 ºC |
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Pressure |
100 bar |
110 bar |
Spitmaan Style AF 151 |
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Description: |
A High Quality Jointing Sheets based on Synthetic Aramid Fibres & Fillers bonded with NBR Elastomers. |
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Suitable Industries/Properties: |
Suitable for use with Gas & Water Supplies, Oils, Chemical Industries, Ship Building and General Purposes. (Medium Service Conditions). |
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Suitable Media: |
Water, Gases, Solvents, Oils, Low Pressure Steam & Various Dilute Chemicals. |
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Identity Colour: |
Brown with Standard Antistick Coating. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
|
Short Term Temperature |
375 ºC |
400 ºC |
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Continuous Service Temperature |
250 ºC |
250 ºC |
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Max. Continous Temperature with steam |
225 ºC |
250 ºC |
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Pressure |
100 bar |
110 bar |
Spitmaan Style AF 154 |
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Description: |
These Jointings are manufactured from a Special Blend of Heat Resisting Aramid Fibres with Fillers and bonded with High Quality of Nitrile Elastomers. |
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Suitable Industries/Properties: |
Suitable for use with Heat Exchangers, Boilers, Radiators, Steam Supplies, & Power Plants. (High Service Conditions) |
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Suitable Media: |
Suitable for Oils, Solvents, Gases, Steam, Dilute Acids and Alkalies. |
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Identity Colour: |
Yellow with Standard Antistick coating. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Short Term Temperature |
400 ºC |
450 ºC |
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Continuous Service Temperature |
250 ºC |
300 ºC |
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Max. Continous Temperature with steam |
250 ºC |
250 ºC |
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Pressure |
150 bar |
160 bar |
Spitmaan Style AF 154 Super |
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Description: |
These Jointings are manufactured by Special Blend of Heat Resisting Aramid Fibres with High Quality of Nitrile Elastomers. |
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Suitable Industries/Properties: |
Suitable for use with Heat Exchangers, Boilers, Radiators, Steam Supplies, & Power Plants. (High Service Conditions) |
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Suitable Media: |
Suitable for Oils, Solvents, Gases, Steam, Dilute Acids & Alkalies. |
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Identity Colour: |
Neutral with Standard Antistick Coating. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
|
Max. Short Term Service Temperature |
450 ºC |
500 ºC |
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Max. Continuous Service Temperature |
300 ºC |
350 ºC |
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Max. Operating Pressure |
150 bar |
160 bar |
Spitmaan Style AF 155 |
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Description: |
These Jointings are manufactured from a blend of Aramid Fiber, Glass Fiber, Mineral Fiber and Fillers alongwith NBR Binder. |
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Suitable Industries/Properties: |
Suitable for aggressive Chemical Industries, Radiators, Boilers, Pipelines, High Stress Conditions & High Temperature Applications. |
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Suitable Media: |
Recommended for Hot gases, Fuels, Oils, mild organic and inorganic acids & steam. |
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Identity Colour: |
Purple. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Short Term Temperature |
450 ºC |
500 ºC |
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Continuous Service Temperature |
400 ºC |
450 ºC |
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Max. Continous Temperature with steam |
375 ºC |
425 ºC |
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Pressure |
150 bar |
160 bar |
Spitmaan Style AF 159 |
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Description: |
These Jointings are manufactured from Premium Grade Synthetic Aramid Fibres/ Carbon Fibres and Fillers bonded with Nitrile Elastomers. |
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Suitable Industries/Properties: |
Suitable for use with Oils, Petrochemicals, Steam Supplies, Automobiles, Ship Building & General Purposes. (High Service Conditions) |
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Suitable Media: |
Suitable for Oils, Solvents, Gases, Steam, Dilute Acids and Alkalies. |
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Identity Colour: |
Black with Standard Antistick coating. Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Short Term Temperature |
450 ºC |
450 ºC |
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Continuous Service Temperature |
275 ºC |
350 ºC |
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Max. Continous Temperature with steam |
250 ºC |
325 ºC |
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Pressure |
150 bar |
160 bar |
Spitmaan Style AF 160 |
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Description: |
These Jointings are manufactured from Top Quality Acid Resistant Compressed Aramid Fibres and Fillers bonded with Special Binders. |
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Suitable Industries/Properties: |
Suitable for Chemical Industries. (Acids & Alkalies) |
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Suitable Media: |
Recommended for Hot Concentrated Organic, Inorganic & Mineral Acids. |
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Identity Colour: |
Blue with Standard Antistick Coating. |
Technical Data
Temperature Rating |
Non- Metallic |
|
Short Term Temperature |
250 ºC |
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Continuous Service Temperature |
210 ºC |
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Max. Continous Temperature with steam |
210 ºC |
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Pressure |
120 bar |
Spitmaan Style AF 170 |
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Description: |
These Jointings are manufactured from Special Heat Resistant Fibres, Fillers and Graphite bonded with High Quality of NBR Elastomers which; demonstrate Excellent Thermal and Mechanical Properties. |
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Suitable Industries/Properties: |
Suitable for use with Heat Exchangers, Boilers, Radiators, Steam Supplies & Power Plants. (High Service Conditions). |
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Suitable Media: |
Excellent resistance to Oils, Solvents, Fuels, Refrigerants, Salt Solutions, Gases, Water and Steam. |
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Identity Colour: |
Black with Standard Antistick coating. Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Short Term Temperature |
600 ºC |
650 ºC |
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Continuous Service Temperature |
450 ºC |
550 ºC |
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Max. Continous Temperature with steam |
425 ºC |
525 ºC |
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Pressure |
150 bar |
170 bar |
Compressed Asbestos Fibre Jointing Sheets
PRESSURE TEMPERATURE CHART
Abbreviations:
XA- General suitability using common installation practices underconditions of chemical compatibility ..
XB- Maximum performance is ensured through appropriate measures for joint designs andgasket installations. Consultation is recommended.
XC- Limited application area. Technical consultation is mandatory .
XD- Area not recommended.
Spitmaan Style 11 Steam |
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Description: |
These Jointings are consistently uniform, solid run constructed resilient quality product with ahighly dependable performance. Its adaptability to many sealing requirements makes this product the most Economical sheet packing choice of Plant Engineers and maintenance men |
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Specifications: |
IS 2712: 1998 Gr.- W/ 3, IS 2712: 1971 Gr. C & IS 2712: 1965 Gr.- C. |
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Suitable Industries / Properties: |
General purpose applications in all industries with less severe working conditions of temperature and Pressure (Low service conditions). |
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Suitable Media: |
Water, LP Steam, Gases, Dilute Acids & Alkalies. |
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Identity Colour: |
Red / Graphited as Standard. |
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Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Recommended Maximum Temperature |
360 ºC |
400 ºC |
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Recommended Maximum Pressure |
30 bar |
35 bar |
Spitmaan Style 20 Steam |
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Description: |
These Jointings are consistently uniform, solid run constructed resilient quality product with ahighly dependable performance. Its adaptability to many sealing requirements makes this product the most Economical sheet packing choice of Plant Engineers and maintenance men. |
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Specifications: |
IS 2712: 1998 Gr.- W/ 3, IS 2712: 1971 Gr. C & IS 2712: 1965 Gr.- C |
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Suitable Industries / Properties: |
General purpose applications in all industries with less severe working conditions of temperature and Pressure (Low service conditions). |
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Suitable Media: |
Water, LP Steam, Gases, Dilute Acids & Alkalies. |
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Identity Colour: |
Red / Graphited as Standard. |
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Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
|
Recommended Maximum Temperature |
380 ºC |
415 ºC |
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Recommended Maximum Pressure |
35 bar |
40 bar |
Spitmaan Style 39 Red/ Grey |
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Description: |
Manufactured from quality Asbestos Fibers and vulcanized with special rubber compound meeting with the exacting requirements of modern industry. |
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Specifications: |
IS 2712: 1998 Gr.- O/ 2, (R 2015), IS 2712: 1979 Gr.- O/ 2, IS 2712: 1971 Gr.- B/O, IS 2712: 1965 Gr.- B/ O, IS 6210: 1971, BS 1832: 1991. |
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Suitable Industries / Properties: |
General engineering purpose Gasketing Material & for Automobiles(Medium Service Conditions). |
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Suitable Media: |
Dry and wet Steam, Water, Gases, Alkalies, Oils at normal temperatures & also against chemicals, Fuels etc. alongwith general engineering purposes. |
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Identity Colour: |
Red & Grey / Graphited as Standard |
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Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Recommended Maximum Temperature |
440 ºC |
480 ºC |
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Recommended Maximum Pressure |
80 bar |
100 bar |
Spitmaan Style 51 Brown |
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Description: |
Manufactured from selected Asbestos Fibres and bonded with premium Gr. Binder compound. This product has a wide range of industrial applications. |
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Specifications: |
IS 2712: 1998 Gr.- W/ 2 (R 2015), IS 2712: 1971 Gr.- B/ S, IS 2712: 1979 Gr.- W/ 2, IS 6210: 1971, DGS & DS/ MISC/ 81- c Item 12(b) Commercial Quality, BS 1832: 1991. |
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Properties: |
General purpose Gasketing material (Medium Service conditions). |
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Suitable Media: |
Steam, Neutral non- flammable gases, Alkaline solutions, Fats, Lyes, Oils, Alcohol, Motor Fuels and such other Engineering Services. |
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Identity Colour: |
Grey & Brown . |
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Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Recommended Maximum Temperature |
440 ºC |
480 ºC |
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Recommended Maximum Pressure |
80 bar |
100 bar |
Spitmaan Style 54 Super |
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Description: |
Manufactured from an excellent quality of Chrysotile Asbestos Fiber and raw materials blended intimately with heat resistant rubber & its compounds under a special process to ensure maximum stability to withstand high Pressures and Temperatures. |
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Specifications: |
IS 2712: 1998 Gr.- W/ 1 (R 2015), IS 2712: 1971 Gr.- A/ S, IS 6210: 1971, DGS & D G/ MISC/ 81- c Item 12(a) Special Quality, BS 1832: 1991. |
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Suitable Industries/ Properties: |
Popularly used in Marine Engines, Electricity generating Sets etc. |
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Suitable Media: |
Saturated Steam, Oxygen, Petroleum distillates, Oils, Fats, Fuels, Internal Combustion engines, Hydrocarbons, Alcohols, Solvents, Lyes etc. |
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Identity Colour: |
Yellow & Grey/ Graphited as Standard. |
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Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Recommended Maximum Temperature |
550 ºC |
600 ºC |
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Recommended Maximum Pressure |
150 bar |
160 bar |
Spitmaan Style 59 Oil |
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Description: |
A high grade Asbestos Fiber Jointing bonded with a premium compound. This specialized Jointing withstands the most exacting demands of Oil and Petrochemical Plants, Solvents, Refrigerators etc. Use of SPITMAAN Style 59 Oil Gasket Sheet assures safety and economy even in critical working conditions. |
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Specifications: |
IS 2712: 1998 Gr.- O/ 1 (R 2015), IS 2712: 1979 Gr.- O/ 1, IS 2712: 1971 Gr.- A/ O, IS 6210: 1971, DEFENCE TS RED/ 71/ 59, BS 1832: 1991. |
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Suitable Industries/ Properties: |
Used in pipelines, apparatus of the petrochemical fields, petrochemical distillates, oils and petroleum refining industries. It is also recommended in industrial processes with high contents of aromatic substances, sulphurous compounds, chloric hydrocarbons, phenols, refrigerants etc. including steam. |
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Identity Colour: |
Greyish Black/Graphited as Standard. |
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Optional steel wire mesh insert on request with Graphite finish as Standard. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Recommended Maximum Temperature |
550 ºC |
600 ºC |
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Recommended Maximum Pressure |
150 bar |
160 bar |
Spitmaan Style 60 Acid |
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Description: |
This is a specialized Asbestos Fibre Jointing Sheet which is intimately bonded with Acid resisting compound to withstand the corrosive action of Acids and Chemicals. |
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Specifications: |
IS 2712: 1998 Gr.- A/ 1. (R 2015) |
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Suitable Industries/ Properties: |
Chemical Industries. (High Service Conditions). |
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Suitable Media: |
Recommended for use against hot & concentrated organic, Inorganic and mineral Acids including Hydrochloric Acid, Sulphuric (Oleum) Acid and Nitric Acids under service conditions of temperatures and pressures commonly encountered in chemical industries. |
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Identity Colour: |
Cream & Light Grey |
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Technical Data
Temperature Rating |
Non- Metallic |
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Recommended Maximum Temperature |
210 ºC |
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Recommended Maximum Pressure |
150 bar |
Spitmaan Style 70 (PARONITE GASKET SHEET JOINTING) |
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Description: |
Superior Grade Compressed Asbestos Gasket Sheet material primarily composed of High Grade Chrysotile Asbestos Fibres, Fillers and bonded with Polychloroprene (CR) Binder specially developed for fuel system agregates in engines of aviation class and Refrigeration’s including flanges of magnesium alloy. |
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Specifications: |
IS 2712: 1998 Gr.- O/ 1 (R 2015) |
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Compliance: |
GOST 481- 80 & IS 2712: 1998 Grade- O/ 1 (R- 2015) |
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Suitable Industries/ Properties: |
Recommended for Aviation Class, Petroleum Fields, Petroleum Distillates (High Service Conditions). |
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Suitable Media: |
Aviation Oils, Aviation Solvents, Gases, HP Steam . |
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Identity Colour: |
Greyish Black. |
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Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
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Recommended Maximum Temperature |
-70 to 550 ºC |
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Recommended Maximum Pressure |
150 bar |
Spitmaan Style S- 1001 |
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Description: |
Top Grade Compressed Asbestos Gasket Sheet material primarily composed of High Grade Chrysotile Asbestos Fibres and Binders reinforced with Steel wire gauze insertion. Developed to comply extremely demanding sealing applications for stability at high fluctuating temperatures and Pressures. |
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Specifications: |
IS 2712: 1998 Gr. W/ 1 (R 2015), IS 2712: 1971 Gr. A/ S, IS 6210: 1971 & BS 1832: 1991. |
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Suitable Industries/ Properties: |
Excellent and Economical choice for Sugar Plants/ Boiler Engineers. (High Service Conditions). |
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Suitable Media: |
Saturated Steam, Oxygen, Petroleum Distillates, Oils, Fats, Fuels, Internal Combustion Engines, Hydrocarbons, Alcohols, Solvents, Lyes Etc. |
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Identity Colour: |
Black Graphited. |
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Optional Steel Wire Mesh Insert available with Graphite Finish. |
Technical Data
Temperature Rating |
Non- Metallic |
Metallic |
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Recommended Maximum Temperature |
600 ºC |
625 ºC |
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Recommended Maximum Pressure |
200 bar |
225 bar |
Spiral Wound Metalic Gaskets
SPIRAL WOUND METALLIC GASKETS:
Throughout the world the oil, gas, petroleum and chemical processing industries operate in environments where only the strongest survive. The precision engineering of materials and their supply, wherever and whenever they are required, is fundamental in order to gain the trust of operators in these most demanding technologies. Our aim is to supply quality products and services and to fulfil our customers' expectations. This is underpinned by our Quality System approvals to ISO 9001: 2015, EIL Approval which are supplemented by many companies and independent authority approvals. In order to support environmental protection and prevention of pollution in balance with socio- economic needs the organization is approved to ISO 14001: 2015 Standards. The Organization has acquired OHSAS 18001: 2007 Standards as it is concerned with achieving and demonstrating sound Occupational Health and Safety Performance by controlling their OH&S risks in order to support and promote good OH&S practices in balance with socio- economic needs. We take great pride in having achieved universal acceptance for providing gaskets used in sealing applications where extreme mechanical and thermal performance demands are considered routine. There are many companies in the sealing industry. Very few can boost the quality of products, quality of service and quality of people found at Champion Jointings Pvt. Ltd.
Description:
These Gaskets are certified for emission control applications. Spitmaan Gaskets will seal flanges where temperature, pressure, vibration or flow rates are beyond the capability of conventional jointing materials.
They are wound in V- section metal strip and a softer filler material so that flange faces are presented with a spiral of alternate metal/ filler layers.
Spiral Wound Gasket Principle:
The spiral wound gasket function is based on the metal strip winding / filler relatioinship and the flange surfaces. Flange surface roughness should be approximately Ra 3.2 um. Spiral wound gaskets can be used with flanges having a larger surface roughness, but the bolt loads should be increased to ensure proper function of the gasket.
As the gasket is compressed during mounting, the soft filler material "flows" into the irregularities of the flange faces. The metal strip winding with the filler material ensures the strength and elasticity of the gasket. If the gasket has a PTFE filler it must have an inner ring since PTFE permits no further compression. The inner ring shall prevent the gasket from springing open and penetration of the flowing PTFE into the pipeline. The larger the surface roughness on the flange face, the larger the surface load required permitting a flow of the PTFE.
Typical applications:
Applications include Oil Refineries, Chemical, Petrochemical, Marine, Power Plants, Pulp, Pipelines, Pressure vessels on steam, metallurgical, nuclear, and hydraulic plants including heat exchangers. Spitmaan gaskets are recommended for flange joints where bolt loading is limited.
Prime Features:
- Gaskets are made to a wide variety of sizes and shapes.
- Combinations of metal winding strip and filler are selected to suit the fluid media and other operating conditions.
- Quick to install and remove.
- Operate at temperatures from cryogenic upto 650 ° C. (Can be increased for specific applications)
- System pressures from high vacuum to over 2500 psi. (Can be increased for specific applications)
- Support rings, inside and/ or outside of spiral winding, make gasket suitable for high line pressure on flat or raised flange faces.
Specification Compliances:
Spitmaan gaskets with graphite and PTFE fillers meet emission control requirements.
Gaskets are manufactured in accordance with all relevant gasket standards to suit flange designations:
ASME B 16.20a: 1994, ASME B 16.5, ASME B16.5 Series A (MSS- SP 44), ASME B16.5 Series B (ASME B16.47 supersedes API 605), IS 7719: 2013, DIN & JIS.
SPIRAL WOUND GASKET SPECIFICATIONS:
TEMPERATURE LIMITS FOR COMMON METALS: TEMPERATURE LIMITS FOR FILLER MATERIALS:
Material |
Minimum |
Maximum |
Abbreviations |
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Material |
Minimum |
Maximum |
Abbreviations |
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°F |
°C |
° F |
° C |
|
°F |
°C |
°F |
°C |
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304 Stainless Steel |
-320 |
-195 |
1400 |
760 |
304 |
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Flexible Graphite |
-350 |
-212 |
850 |
550 |
F. G. |
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304 L Stainless Steel |
-150 |
-100 |
1400 |
760 |
304 L |
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PTFE |
-400 |
-240 |
500 |
260 |
PTFE |
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316 Stainless Steel |
-150 |
-100 |
1400 |
760 |
316 |
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Asbestos |
- - |
- - |
842 |
450 |
ASB |
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316 L Stainless Steel |
-150 |
-100 |
1400 |
760 |
316 L |
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Ceramic |
-350 |
-212 |
2000 |
1090 |
CER. |
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321 |
-320 |
-195 |
1400 |
760 |
321 |
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Monel |
-200 |
-130 |
1500 |
820 |
MON |
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Guide Ring Material |
COLOUR CODING AND ABBREVIATIONS FOR CGI: |
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As Standard |
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Carbon Steel |
CS |
Material |
Flexible Graphite |
Polytetrafluoro-ethylene |
Asbestos |
Ceramic |
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Others |
Type |
Stainless Steel |
SS (304, 316 & 321) |
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|
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Monel |
MON |
Abbreviations |
F. G. |
PTFE |
ASB |
CER |
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Colour Code |
Gray Stripe |
White Stripe |
No Stripe |
Light Green Stripe |
GASKET FACTORS: |
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Gasket Style & Material |
Gasket Factor M |
Gasket Factor Y (psi) |
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SPITMAAN Spiral Wound Gasket |
3.00 |
10000 |
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DENTIFICATION MARKS:
I
Important:
Under no circumstances should flange sealing surfaces be machined in a manner that tool marks would extend radially across the sealing surface. Such tool marks are practically impossible to seal regardless of the type of gasket used.
Required Gasket Compression for Spiral Wound Gaskets Spiral Wound Gaskets with internal or external rings, i.e. Styles ‘CG’ and ‘CGI’ can be compressed to the ring thickness, if necessary. This will not damage the gasket or affect the sealing performance and the ring is provided as a compression limiting stop.
Hints of Installation and Maintenance:
When installing a Spiral Wound Gasket, check the dimensions of the Gaskets for use between pipe and pressure vessel flanges. The procedure is as follows
Measure ID of flange contact face.
Measure Gasket ID. If Gasket ID is not 1/8″ larger than flange ID, do not use it unless it can be installed perfectly centered.
A Spiral Wound Gasket does not have the same feel as other Metallic or Non-Metallic Gaskets during the bolting-up. It’s different-because it gives a little bit under each bolt as it is tightened. It is therefore important to tighten the bolts in small steps in proper sequence as shown hereunder. Final tightening must be uniform with each bolt pulling same load. This will guarantee a trouble free joint. If not uniform, the joint may leak-particularly after it has been in hot service. Tighten the bolts after 24 hours and again a week later.
Gasket Selection:
Ensure that the correct style of gasket has been selected for the appropriate application.
Spiral Wound Gaskets are one of the best all-around seals which offer a low-cost solution that has the ability to handle temperature and pressure fluctuations. Multiple plies of metal and filler in the spiral form create a barrier that reduces the possibility of leaks.
Be certain that the gasket you order is as resistant as possible to the media, the temperature application and the working pressure involved. Check the chemical compatibility of the metal as well as the filler material for the media to be sealed. As a general rule, the Inner Ring and the metal used in the spiral winding should be similar to the flange material. The compressibility of flexible graphite makes it an excellent filler material for metallic gaskets. Flexible graphite may be used in services with temperatures up to 1200 °F (650 °C), though it should not be used with strong oxidizers such as nitric or sulphuric acid. PTFE filler material provides excellent chemical resistance at temperatures below 500 °F (260 °C). In accordance with ASME B16.20, an inner ring is required when using Conventional PTFE filler materials, in order to protect the winding from radial buckling.
Manufactured in Accordance with ASME B16.20:
Spiral wound gaskets— made with an alternating combination of preformed metal and soft filler materials which form a very effective seal when compressed between two flanges. A v-shaped crown centered in the metal strip acts as a spring, giving gaskets greater resiliency under varying conditions. Filler and wire material can be changed to accommodate different chemical compatibility requirements. Fire safety can be assured by choosing flexible graphite as the filler material. If the load available to compress a gasket is limited, gasket construction and dimensions can be altered to provide an effective seal. A spiral wound gasket may include a centering ring, an inner ring or both. The outer centering ring centers the gasket within the flange and acts as a compression limiter, while the inner ring provides additional radial strength. The inner ring also reduces flange erosion and protects the sealing element. Resiliency and strength make spiral wound gaskets an ideal choice under a variety of conditions and applications. Widely used throughout refineries and chemical processing plants, spiral wound gaskets are also effective for power generation, pulp and paper, aerospace, and a variety of valves and specialty applications.
As set forth in ASME B16.20, all PTFE filled spiral wound gaskets will be supplied with inner rings. In addition, the following higher pressure class spirals will be supplied with inner rings for all filler material:
Nominal Pipe Size |
Pressure Rating |
NPS 4” and above |
25 Mpa |
NPS 12” and above |
10 Mpa |
NPS 24” and above |
6 Mpa |
NPS 26” to 60” |
All |
Starting in May 2008, the metricated edition of this standard recommends the use of inner rings for all graphite filled spiral wound gaskets. However, these gaskets may be specified without inner rings by the purchaser. Both styles will still be stamped ASME B16.20 compliant on the outer guide ring.
Style Spiral Wound:
Suitable for tongue and groove, male-female, or groove-to-flat face flanges. Spiral winding only contains preformed metal and soft filler material. Available with Centering (Outer) and Inner Rings. However, these gaskets are also supplied without rings on special request by customers especially in case of 3.20 mm thickness.
Flange Inspection:
Ensure flange faces are clean and free from imperfections which could be detrimental to the sealing performance. The flange faces shall be in a good condition and with a turned surface finish within the following range Ra 3.2 to 6.3 micrometres (125 to 250 micro inches).
Strips:
Width and thickness of the metallic strips will be as per the following table: (Table 1)
Sr. No. |
Thickness of gasket |
Width of S.S. Strip |
Thickness Range Of S. S.Strips |
1 |
3.2 mm |
4.32 to 4.40 mm |
0.152 to 0.28 mm |
2 |
4.5 mm |
5.33 to 5.40 mm |
0.15 to 0.28 mm |
Filler:
The filler material thickness shall be 0.304 to 0.812 mm and should flush with but not below the contact faces of the gasket.
DIMENSIONS & TOLERANCES:
In respect of gaskets with 3.2mm thickness, the Dimensional Specifications are as per Customers requirements.
In respect of gaskets of 4.5mm thickness, the Dimensional Specifications are followed as per Table No. 1, unless otherwise specified by the customer.
Tolerances for Centering Ring & Sealing Element: (Table No. 2)
Sr. No. |
Dimensions |
Centering Ring |
Sealing Element |
1 |
O.D. |
For NPS ½" to 24"→± 0.00– 0.762 mm.For NPS ½" to 25" to 60"→± 0.00– 0.762 mm. |
For NPS ½" to 8"→± 0.80 mm.For NPS 10" to 24"→+ 1.50– 0.80 mm |
2 |
I.D. |
- - |
For NPS ½" to 8"→± 0.4 mm |
3 |
Thickness |
2.971 to 3.327 mm |
4.455 ± 0.127 mm |
For Raised Face, Slip-on and Welding Neck Joints (Flanges)
7/40″ (4.50 mm) Thick Gaskets 1/8″(3.2 mm) Thick Centering Ring. (Table No. 3)
Nominal Pipe Size. |
Gasket O.D. |
Pressure Classes |
|||||||||||||
150 lb |
300 lb |
400 lb |
600lb |
900 lb |
1500lb |
2500lb |
|||||||||
All the Figures below are in mm |
|||||||||||||||
Gasket I.D. |
Ring O.D. |
Gasket I.D. |
Ring O.D. |
Gasket I.D. |
Ring O.D. |
Gasket I.D. |
Ring O.D. |
Gasket I.D. |
Ring O.D. |
Gasket I.D. |
Ring O.D. |
Gasket I.D. |
Ring O.D. |
||
34² |
876.3 |
911.4 |
990.6 |
901.7 |
952.5 |
1057.4 |
901.7 |
952.5 |
1054.1 |
901.7 |
952.5 |
1073.2 |
901.7 |
952.5 |
1136.7 |
36² |
927.1 |
968.5 |
1047.8 |
958.9 |
1009.7 |
1117.6 |
958.9 |
1009.7 |
1117.6 |
958.9 |
1009.7 |
1130.3 |
958.9 |
1009.7 |
1200.2 |
38² |
977.9 |
1019.3 |
1111.3 |
977.9 |
1016.0 |
1054.1 |
971.6 |
1022.1 |
1073.2 |
990.6 |
1041.4 |
1104.9 |
1035.1 |
1085.8 |
1200.2 |
40² |
1028.7 |
1070.1 |
1162.1 |
1022.4 |
1070.1 |
1114.6 |
1025.7 |
1076.5 |
1127.3 |
1047.8 |
1098.6 |
1155.7 |
1096.6 |
1149.4 |
1251.0 |
42² |
1079.5 |
1124.0 |
1219.2 |
1073.2 |
1120.2 |
1165.4 |
1076.5 |
1127.3 |
1178.1 |
1104.9 |
1155.7 |
1219.2 |
1149.4 |
1200.2 |
1301.8 |
44² |
1130.3 |
1175.1 |
1276.4 |
1130.3 |
1181.1 |
1219.2 |
1130.3 |
1181.1 |
1231.9 |
1162.5 |
1212.9 |
1270.0 |
1206.5 |
1257.3 |
1368.6 |
46² |
1181.1 |
1228.9 |
1327.2 |
1178.1 |
1228.9 |
1273.3 |
1193.8 |
1244.6 |
1289.1 |
1212.9 |
1263.7 |
1327.2 |
1270.0 |
1320.8 |
1435.1 |
48² |
1231.9 |
1279.7 |
1384.3 |
1235.2 |
1286.0 |
1324.1 |
1244.6 |
1295.4 |
1346.2 |
1270.0 |
1320.8 |
1390.7 |
1320.8 |
1371.6 |
1485.9 |
50² |
1282.7 |
1333.5 |
1435.1 |
1295.4 |
1346.2 |
1376.0 |
1295.4 |
1346.2 |
1403.4 |
1320.8 |
1371.6 |
1447.8 |
- - |
- - |
- - |
52² |
1333.5 |
1384.3 |
1492.3 |
1346.2 |
1397.0 |
1428.8 |
1346.2 |
1397.0 |
1454.2 |
1371.6 |
1422.4 |
1498.6 |
- - |
- - |
- - |
54² |
1384.3 |
1435.1 |
1549.4 |
1403.4 |
1454.2 |
1492.3 |
1403.4 |
1454.2 |
1517.7 |
1428.8 |
1479.6 |
1555.8 |
- - |
- - |
- - |
56² |
1435.1 |
1485.9 |
1606.6 |
1454.2 |
1505.0 |
1543.1 |
1454.2 |
1505.0 |
1568.5 |
1479.6 |
1530.4 |
1612.9 |
- - |
- - |
- - |
58² |
1485.9 |
1536.7 |
1663.7 |
1511.3 |
1562.1 |
1503.8 |
1505.0 |
1555.8 |
1619.3 |
1536.7 |
1587.5 |
1663.7 |
- - |
- - |
- - |
60² |
1536.7 |
1587.5 |
1714.5 |
1562.1 |
1612.9 |
1644.7 |
1568.5 |
1619.3 |
1628.8 |
1593.9 |
1644.7 |
1733.6 |
- - |
- - |
- - |
Centering Ring: If specified by the customer the gaskets shall be furnished assembled into a Centering Ring suitably grooved on the inside diameter so as to retain the gasket. The centering ring thickness shall be 2.971 mm to 3.327 mm. Outside diameter tolerance should be ±0.762 mm.
Inner Ring: If specified by the customer the gasket shall be furnished assembled in an Inner ring. The Inner Ring thickness shall be between 2.971 mm to 3.327 mm and suitably rigged on an outer diameter so as to protrude a maximum of 1.524 mm. into the groove of the gasket. The Inner Ring O.D. should match the gasket I.D. The inside diameter of the inner ring will be as per the customer requirement. The inner ring inside diameter tolerance should be ± 0.80 mm for NPS ½" to 60".
Ordering Information:
When ordering spiral wound gaskets please specify the following:
Gasket Style. |
|
Gasket Shape (Circular) |
|
Gasket Thickness |
|
Nominal Pipe Size |
|
Pressure Rating |
|
Operating Temperature |
|
Gasket Standard. |
|
Winding and Filler materials |
|
Specific gasket dimensions if other than standard. |
|
Outer Ring Material. |
|
Thickness of gasket if other than Standard. |
|
Quantity |
|