1. Safe & Environmentally-friendly Pipe Connection Technology
Environmental Gasket
Safe & Environmentally-friendly Pipe Connection Technology

2. The Future of High Performance Sealing
FISHBONE™ Gasket
The Future of High Performance Sealing

3. Spiral Wound Gaskets Historical Development
Developed in early 1900s, evolved to become the industry standard for higher temp and higher pressure applications in refining, petrochemical, oil, gas and power.
SWG dimensions for ASME 16.5 & flanges are specified in ASME 16.2 ( and correlating API standard)
JIS, JP and DIN are other common dimensional standards
Extensively used in Refining, Petrochemical, Chemical and Power

4. Spiral Wound Gasket Installation and performance problems
Unwinding (especially large narrow cross section gaskets)
High minimum seating stress (12,000PSI) results in buckling
Windings entering process stream

5. Expensive Spiral Wound Failure!

6. Spiral Wound Gasket “Fixes”
ASME 16.2 Para now mandates all PTFE SWGs have inner rings to increase “hoop strength” to avoid buckling, unraveling and filler material ingression into pipe
API now recommends that all SWGs in refinery service, including graphite, have inner rings to avoid buckling, unraveling and FM ingression into pipe

7. Spiral Wound Gaskets Advantages Excellent compression
Self-energized by system pressure
Good general service sealability
Decades of use in many industries
Disadvantages
Easily falls apart
Easily crushed
Flange damage from sharp windings
Insufficient load results in “soft” co connection
High In Service Stress Relaxation
Limited Recovery

8. Camprofile (Kammprofile) Gaskets
Historical Development
Developed in 1980s to replace problematic and failing SWGs
Design eliminates many of the known issues of SWGs
Unitary metallic design eliminates all unwinding/ buckling issues
Compressibility like sheet gasket results in lower initial seating stress than SWGs
Will not fall apart in temperature/ pressure/ vibration cycling
Low in-service stress relaxation
Large diameter gaskets easy to handle ( no windings to “pop out”)
Bolt load (gasket stress) directly applied to sealing face versus windings like in SWG
Achieves minimum sealing stress (6,000PSI) quicker than SWGs
Widely used in Europe but only now becoming more popular in USA
Common solution for heat exchangers
Comes with or without centering ring

9. Camprofile (Kammprofile) Gaskets
Advantages
Does not fall apart or unwind like SWGs
Non-crushable/ Difficult to destroy by over-compression
Easy to handle/ install
Excellent compressibility and loading / low seating stress
Better sealability than SWG
Less sensitive to bolt up inconsistencies and minor flange surface blemishes
Disadvantages
Poor recovery performance ( virtually zero recovery)
Sharp teeth damage and degrade flange sealing surface
Not self-energized by fluid pressure (dead gasket)

10. FISHBONE™Gasket Historical Development
Using a Six Sigma design and quality philosophy, the Environmental Gasket design team researched, cataloged and tested the good and bad features of all current gasket technologies
The design team then set out to design, from the ground up, a new and remarkable gasket technology which incorporated only the relevant good features of current high performance gaskets, while eliminating any and all of the negative features and variables.
The result is a patented gasket design which can only be described as the “Ultimate Gasket Technology” for the 21st Century.

11. 21st Century Gasket Technology
FISHBONE™Gasket
Shown Uncompressed
21st Century Gasket Technology

12. 21st Century Gasket Technology
FISHBONE™Gasket The Ultimate Gasket for critical and chronic problem applications
Shown Uncompressed
21st Century Gasket Technology

13. 21st Century Gasket Technology
PATENTED FishboneTM
Features & Benefits
1. Stop-step design – Non-Crushable!
2. Round-teeth design – No Flange Damage!
3. Self-energized
by fluid pressure
4. Extraordinary High Strength, Totally CNC Machined Metallurgy
21st Century Gasket Technology

14. 21st Century Gasket Technology
Style 1 Type Style 2 Reinforced/Duo-seal Type
Male & Female Flanges
Raised Face & Flat Face Flanges
Style I Type
To replace Spiral Wound Style R & RIR
& Kammprofile Basic Type
Style II Type / Duo-seal
To replace Spiral Wound Style CG, Style CGI & Kammprofile Reinforced Type
Available To replace Spiral Wound Style R Type
Tongue & Groove Flanges
21st Century Gasket Technology

15. FISHBONE™ - How it works

16. STILL™ Program 25 times lower leakage than CFET Test limit
1,000,000 times lower leakage than TA-LUFT Test limit
25 times lower leakage than CFET Test limit
PASS API 6FB Fire Test

17. TA-Luft Test Results

18. Chevron CFET Gasket Test

19. STILL™ Program Materials
Metal: MONEL 400, 317L SS, Titanium, 304 SS, 304L SS etc.
Non-metallic Seal Face: Flexible Graphite, PTFE, ePTFE
Temperature Range
If the seal face width > 9mm, select Type II Duo-seal
If width ranges from 5.5mm to 9mm, select Type I Basic type
Duo-Seal Reinforced Type Basic Type
Sizes
Material
Min. Temp. (°C)
Max. Temp. (°C)
Min. Temp. (°F)
Max. Temp. (°F)
Flexible Graphite
-212
650
-350
1200
PTFE
-240
260
-400
500
Mica
1000
1850 DN
PN (MPa)
NPS
Class (lbs)
10 ~ 2000
1.6 ~ 40
½” ~ 60”
150 ~ 2500

20. ENVIRONMENTAL GASKET Fishbone™
pH Range: 0 – 14 Except Strong Oxidizers
Pressure Rating: Vacuum to 5000 PSIG ( 350bar )
Temperature Rating: Steam: -320ºF to 1200ºF (-200ºC to 650ºC), Inert Medium: -320ºF to 1600ºF (-200°C to 900ºC)
P x T Rating: C x Bar = 250,000; F x PSI = 6,000,000
Low Minimum Seating Stress (Y Factor): 6,000PSI
Very Low Minimum In Service Stress (EN-13555)
@160Bar pressure Qsmin(60MPA) is 18MPA (2,600PSI)
@40 Bar pressure Qsmin(60MPA) is 5MPA (750PSI)

21. Compression of “Bone” and Sealing Element
Flange Roughness
Sealing Element
“Bone”
Uncompressed
Compressed

22. “Bone” Shape: 3 Arcs provide bending moment for elastic recovery
Long teeth design, better recovery
“Bone” Shape: 3 Arcs provide bending moment for elastic recovery
There are 3 half circles on each Fishbone teeth, which provide 3 recovery points.
Recovery Points
Before
After
Uncompressed

23. Long teeth design, better pressure resistant
When Fishbone is pressed, its bending teeth balance more press than other gaskets' straight teeth “Bone” Shape: 3 Arcs provide bending moment for elastic recovery than sharpe teeth root does, avoid of yield strength. By contributing press into larger places, Fishbone gasket enjoys better fatigue resistance and longer life.
Long teeth design, better pressure resistant
Before
After
Compressed

24. Continuous Support for Sealing Element Across Gasket Face

25. Support for Sealing Element Across Gasket Face
Fishbone: Continuous and no flange damage
Spiral Wound: Discontinuous and flange damage
Camprofile: Discontinuous and flange damage

26. Flange Condition
Fishbone replaced Gore 500 Expanded PTFE Tape on severely rotated flange

27. Rotated Flange Sealing
Uncompressed sealing material allows fluid penetration
“Bones” compress sealing material using
system fluid pressure

28. Flange Condition
Boiler Header Flange: Fishbone installed and working well!

31. Easy to Handle and Install

32. Heat Exchanger Reliability Sealing Program

33. Heat Exchanger Realities

34. Hot fluid out
Steam in
Cool fluid in
In operation, these flanges have two totally different temperature zones. They are Hot at the top and Cold at the bottom.

35. These thermal images of Heat Exchangers, at operating temperatures, show clearly the varying temperature zones that the gaskets and bolts are seeing.
The result is that the originally applied gasket seating stresses are no longer being maintained and any additional thermal cycling will further negatively effect the seating stress

36. Traditional Heat Exchanger Gaskets
Metal Jacketed/ Envelope
- Low Compressibility
- Require Excellent Flange Surface Finish
- Very High In-Service Consolidation= Hot Torqueing
Spiral Wound Gaskets
- Without Inner Ring Large Gaskets Easily Unwind ( Spare Required)
- Requires High Seating Stress (Y Factor= 12,000 PSI)
- High Seating Stress= Buckling, Bolt Yielding, Flange Rotation
- Uneven Loading Causes Failure
Camprofile Gaskets
- Sharp Teeth Damage Flange Face
- No Recovery= Fails with Temperature cycles

37. Sealing Elements Available: Graphite, PTFE, Expanded PTFE, MIca
Any Heat Exchanger gasket configuration style is available with diameters up to 5 feet (2 meters).
Available in various metallurgies to meet the requirements of any specialized application.
Sealing Elements Available:
Graphite, PTFE, Expanded PTFE, MIca

39. Vertical Heat Exchanger
Spiral Wound Gasket Removed
Fishbone Installed

40. Fishbone™ vs. Spiral Wound
Spiral Wound Advantages
Compress easily and acceptable recovery rate.
Self-energized by system pressure.
Acceptable seal-ability
Disadvantages
Easy to fall apart
Easily crushed and prone to unwinding and buckling in systems with fluctuating pressures or excessive vibration.
Flange damage because of the very thin sharp winding edges.
Fishbone™ Advantages
Structurally very strong; all CNC machined.
The Fishbones™ are self energized by pressure.
The angled Fishbones™ with rounded tips cause no flange face damage.
Highly resistant to pressure fluctuations and vibration.
All of these technologies are 30+ to 100+ years old!
Fishbone™ vs. Spiral Wound

41. Fishbone™ vs. Kammprofile
Kammprofile Advantages
Can not unwind like Spiral Wound
Difficult to destroyed by over compression
Disadvantages
They have virtually Zero recovery, which is a significant issue in systems that experience temperature cycling.
The solid perpendicular points very frequently dent and degrade the flange sealing surfaces.
They receive Zero sealing assistance or self-energizing effect from system pressure.
Fishbone™ Advantages
All of these technologies are 30+ to 100+ years old!
They have excellent recovery.
The angled Fishbones™ with rounded tips cause no flange face damage.
The Fishbones™ are self energized by pressure.
Fishbone™ vs. Kammprofile