*mydirectindustry

Catalogs
Flexitallic
Change brochure

Change brochure

Product catalog summary

Introduction
The document outlines the development and benefits of the Change gasket, a metal-wound gasket by Flexitallic, known for its durability and dynamic sealing capabilities.

History and Development
Flexitallic, the inventor of the spiral wound gasket in 1912, introduced the Change gasket a century later. This gasket is made with proprietary equipment, featuring a metal spiral five times thicker than traditional designs and a unique laser welding process, eliminating the need for inner or outer rings and enhancing performance.

Key Features

Blowout Resistant
Excellent Tightness and Recovery
Handles Cyclic Conditions Well
Good Handleability
Low Seating Stress

The Change gasket reduces complexity by eliminating spring washers, decreases man-hours for re-torque, and improves safety by eliminating hot torquing.

Performance Comparison
Compression tests at 18,000 PSI (124 MPa) showed the Change gasket's superior recovery, performing nearly five times better than Kammprofile and DJ gaskets. A table in the document compares compression and recovery percentages of various gasket styles, highlighting the Change gasket's superior performance.

Conclusion
The Change gasket offers a unique combination of durability, safety, and efficiency, available with a locating ring in all sizes upon request, making it versatile for various applications.

Specifications and Constants
The document details gasket specifications, including constants like ASME m (2.5), ASME Y (6,400 psi), PVRC Gb (1,124 psi), PVRC a (0.25), and PVRC Gs (16.1 psi). It lists available materials, dimensions, and thickness options, emphasizing carbon steel outer guide rings and materials like 304 & 316, 347 & Inc 625, and Monel.

Thermal Cycle Test
A 24-day, 24-cycle pressure vs thermal cycle test at 608°F (302°C) showed the Change gasket losing only 1.5 PSI, outperforming other gaskets by at least nine days. The test involved heating, pressurizing, and cooling cycles, with a maximum allowable pressure drop of 14.5 psi.

Successful Applications
The document highlights successful applications of Change gaskets in various industries:

Fertilizer Industry: Installed in October 2013, withstanding 15 thermal cycles up to 865°F (462°C) without re-torquing.
Refining: Used since April 2013, handling 28 thermal cycles up to 715°F (379°C) without issues.
Chemical Processing: Effective in sealing molten sodium at 360°F (182°C) with short-term cycling to 1500°F (815°C).
Boiler Manways: Converted to Change Gaskets in March 2013, improving handling and replacing graphite spirals.
Steam Piping System: Sealing steam piping since February 2013 at 800°F (427°C).
Sealing Over Nubbin: Successfully sealing steam at 650°F (343°C) since July 2013.

Change Summary
The Change gasket is more robust and consistent than spiral and kammprofile gaskets, with very low creep and high recovery. It is crush-resistant, fits most flange arrangements, and is available in all industrial metals.

Contact Information
Contact details for Flexitallic offices in China, France, Germany, Kazakhstan, Singapore, Canada, UAE, and Saudi Arabia are provided.

Catalog excerpts

THE ONE THE ONE CONSTANT CONSTANT IS CHANGE IS CHANGE PROVEN TECHNOLOGY. PROVEN PROBLEM SOLVER. innovate/customize/educate PROVEN TECHNOLOGY. PROVEN PROBLEM SOLVER. innovate/customize/educate Downloaded from www.flexitallic.eu

Open the catalog to page 1

CHANGE CHANGE CHANGE HISTORY HISTORY HISTORY IT’S MADE LIKE NO OTHER, IT’S MADE LIKE NO OTHER, IT’S MADE LIKE NO OTHER, SEALS LIKE NO OTHER IT’S MADE LIKE60%OTHER, ANDSEALS LIKE NO OTHER PERFORMS NO LONGER! SEALS LIKE NO OTHER ANDSEALS LIKE NO OTHER AND PERFORMS 60% LONGER! PERFORMS 60% LONGER! AND PERFORMS 60% LONGER!. , CHANGE IT’S SAFE CHANGE,, IT’S SAFE.. CHANGE IT’S SAFE CHANGE, IT’S SAFE. THE CHANGE GASKET. UNIQUELY MANUFACTURED. THE CHANGE GASKET. THE CHANGE GASKET. UNIQUELY MANUFACTURED. UNIQUELY MANUFACTURED. SHAPE THE CHANGE GASKET. SHAPE UNIQUELY MANUFACTURED.& Others > 304 – 316L...

Open the catalog to page 2

CHANGE GASKET BENEFITS Features Spiral Wound Gasket Flexpro (kammprofile) CHANGE Gasket Spiral Wound Gasket Flexpro (kammprofile) CHANGE Gasket Features Blowout Resistant BENEFITS CHANGE GASKET Features Excellent Resistant Blowout Tightness Blowout Resistant Blowout Resistant Features Excellent Recovery Excellent Tightness ExcellentResistant Excellent Tightness Blowout Tightness Cyclic Conditions Excellent Recovery Excellent Tightness Excellent Recovery Excellent Recovery Cyclic Conditions Good Handleability Cyclic Conditions Cyclic Conditions Excellent Recovery Low Seating Stress Good Handleability...

Open the catalog to page 3

GASKET CONSTANTS GASKET CONSTANTS CROSS SECTIONAL CUTAWAY Monel also available Filler & Facing Standard Windings Available Materials Locating Thickness Maximum Radial Width Maximum Minimum Radial Width Radial Width PTFE and Thermiculite also available Monel also available Flexible graphite - Standard 1” ID PTFE and Thermiculite (TH855) also available Maximum Diameter 80” ID Carbon Steel outer guide ring; tabs for larger OD Minimum Diameter Dimensions Thickness Flexible graphite - Standard 304 & 316 available in 0.125” and 0.177”. 347 & Inc 625 available in 0.177” only. Carbon Steel outer guide...

Open the catalog to page 4

THERMAL CYCLE TEST– 24 CYCLES Refinery Specified rig and test represents the potential typical number of temperature fluctuations on a refinery over 4 years with no re-torque THERMAL CYCLE TEST– 24 CYCLES • 4” Class 300, RF, B16 studs Refinery Cycle Phase • ThermalSpecified rig and test represents the potential typical number of temperature fluctuations on a refinery over 4 years with no re-torque - Purge and Heat up to 608°F (302°C) at 3.5°F/min (temp chosen so oxidation would not skew results) • 4” Class 300, RF, B16 studs - Pressurize to 480 psi • Thermal Cycle Phase - Hold 1 hr - Purge and...

Open the catalog to page 5

ISTORY SUCCESSFUL APPLICATION, FERTILIZER INDUSTRY • Superheater Exchanger • Change gaskets installed October 2013 and “have withstood” 15 thermal cycles from ambient to 865°F (462°C) during the first 9 months of service • Per Operations, they are “still performing well and remain in service.” • Superheater Exchanger • NO RE-TORQUING OR HOTOctober 2013 and “have withstood” 15 thermal cycles • Change gaskets installed TORQUING HAS BEEN REQUIRED • NOx Gas & Steam from ambient to 865°F (462°C) during the first 9 months of service • Continuous Operating Conditions: 865°Fwell and remain in service.”...

Open the catalog to page 6

CHANGE SUMMARY • Construction is more robust a spiral and kammprofile CHANGE SUMMARY thanthan a spiral and kammprofile • Compression is more consistent • Construction more a spiral and kammprofile • Creep is SUMMARY CHANGEVERYislow robust thanthan a spiral and kammprofile • Compression is more consistent • Recovery is VERY high Construction is more robust than a spiral and kammprofile • Creep is VERY low • Seals with exceptional tightness,than a spiral and kammprofile Compression is more consistent especially thermal cycles • Recovery is VERY high Crush is VERY low • Creep resistant; no inner...

Open the catalog to page 7

Give us your toughest application. Give us your toughest application. ® UNITED KINGDOM l FLEXITALLIC LTD. Scandinavia Mill Hunsworth Lane Cleckheaton BD19 4LN United Kingdom Phone: + 44 1274 851273 Fax: + 44 1274 300303 USA | FLEXITALLIC L.P. flexitallic.eu 6915 Highway 225 Branches also in Aberdeen, Middlesbrough, Deer Park, TX 77536 USA Ellesmere Port and Cardiff phone: +1 281 604 2400 TO REQUEST WHITE PAPER GO TO www.flexitallic.eu TO REQUEST WHITE PAPER GO TO UNITED ARAB EMIRATES |FLEXITALLIC LLC KAZAKHSTAN | Novus Sealing Caspian LLP CHINA | FLEXITALLIC GASKET TECHNOLOGIES Amenity Centre,...

Open the catalog to page 8

All Flexitallic catalogs and technical brochures

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

Brand list