FXP Duct Specs

ATS FXP™ offers a unique, approved combination of flame, smoke, and corrosion resistance characteristics. ATS FXP™ is a dual-laminate system. The corrosion-resistant interior liner consists of a synthetic veil and glass reinforcement, saturated with a chemically-resistant vinyl ester resin. This corrosion-resistant interior is contained within an exterior structural shell made using ATS’ firesafe proprietary phenolic resin. ATS FXP™ was specifically designed to exhaust robotic wet benches, gas cabinets, tanks, photo resist, dry etchers and other processes common in semiconductor fabrication facilities. Available in standard brown or optional white or gray colors. (Other colors available on request.)

ATS FXP™ is easily assembled using the ATS H-Collar™, the ATS Internal Beaded Slip Collar™ or flanges, including the ATS Van Stone Flange™. The ATS H-Collar™ and ATS Internal Beaded Slip Collar™ maintain the integrity of the ATS FXP™’s corrosion resistance by providing a continuous corrosion barrier on the inside of the duct. H-Collars™ do not require external glass and resin lay-ups, saving time and money.

ATS FXP™ is:

FM#4922 approved for installation without sprinklers: TS FXP™ is listed for use on non-flammable corrosive vapor exhaust systems (exhausting up to one square foot of flammable liquid exposure per inlet) without the necessity for internal fire sprinklers. It is approved by Factory Mutual Research, File # J. OR6A1. AC, based on FM #4922 tests.

FM#4922 approved for smoke removal without the necessity for a separate smoke removal duct system: TS FXP™ is specifically listed by Factory Mutual (after non-collapse, non-close off fire tests) for smoke removal from cleanroom areas when properly designed and sized without the necessity for fire protection sprinkler systems or dampers installed within the duct.

FM #4910 approved: ATS FXP™ is specifically listed by Factory Mutual for use in Cleanrooms.

International Fire Code Group H-6 Occupancies

ATS FXP™ complies with paragraph 2703.10.4.2 Exception #1

California State Fire Marshal Listing Service

ATS FXP™ is listed under Fume Exhaust Ducts and/or Fume and Smoke Exhaust Ducts for cleanroom applications and general purpose use in exhausting air, noncombustible fumes and smoke without the need for interrupters or automatic sprinkler protection.

NFPA 318-15–Protection of Cleanrooms

ATS FXP™ complies with paragraphs 9.3.4, 9.3.5, 9.3.6, 9.3.7 &

Technical Information

Maximum Continuous Operating Temperature: 230°F (110°C)
Coefficient of Thermal Expansion: 2.0 X in/in X 10-5 X °F of Duct (not ambient temperature)
Example: 100’ at 100 ° F (Differential in Duct Temperature) = 2.0 X 1200” X .00001 X 100 = 2.4”

ATS FXP™s are manufactured integrating proprietary trade secret methodologies and resins in conjunction with patents. ATS ChemBond™ joining compound and ATS CleanCoat™ coating are also made using trade secret formulations.

Suggested Specification for ATS FXP™

  1. Acceptable manufacturers
    1. Duct: ATS FXP™
    2. Joining System: ATS H-Collar Joining System,  ATS Internal Beaded Slip Collar™, and ATS ISO Flange™ with ATS ChemBond™ Resin/Putty and/or ATS Van Stone Flange™
    3. Surface coatings: ATS CleanCoat™ (cleanrooms) and ATS CleanCoat X™ (exterior)
  2. Internal Corrosion-resistant Surface
    1. The internal liner in contact shall be a minimum 50 mil Ashland Derakane 510A Vinyl Ester and shall be resistant to the chemicals in use.
  3. Structural Wall
    1. The structural layer of duct wall thickness shall be fabricated by either filament wound or hand layup techniques to the dimensional thickness and strength required by ASTM and SMACNA standards.
  4. Service Duty
    1. Allowable Vacuum. The duct shall be able to withstand 15 inches W.C. of negative pressure.
    2. Allowable Pressure. The duct shall be able to withstand 30 inches W.C. of positive pressure.
    3. Maximum Operating Temperature: 230oF
    4. Chemical Resistance. The duct shall be resistant to the chemicals in use.The duct shall also be resistant to the following:
      1. Sulfuric Acid 75% @100°F
      2. Nitric Acid 20% @100°F
      3. Sodium Hydroxide 50% @100°F
      4. Hydrofluoric Acid 20% @100°F
  5. Approvals
    1. The duct shall be approved under:
    2. Factory Mutual #4922 Standard, including smoke removal approval, and
    3. Factory Mutual #4910 Standard for use in cleanrooms.
  6. Joints
    1. Joints should be made using ATS H-Collar™ with ChemBond™ Putty/Resin.
    2. (Optional) Joints can also be made using ATS Internal Beaded Slip Collar™ with ATS Van Stone Flanges™, ATS ISO Flanges™ and/or ATS ChemBond™ Putty (interior) and a boat cloth wrap with ATS ChemBond Resin™ (exterior), where job site conditions will not allow the use of the ATS H-Collar™.
    3. Joints shall be made according to ATS Manufacturer’s Installation Instructions (see Section 4 – Installation).
    4. Joining compound shall be ATS ChemBond™ Putty/Resin.
      1. Manufacturer should show proof of ten years field experience including joining resin/putty.
      2. Manufacturer shall supply test reports showing suitability of using joining materials in cleanrooms.
      3. Manufacturer shall supply test reports on the joining system for flexural, tensile, shear, and peel strength.
  7. Live Taps:
    1. Duct system should be such that branches can be applied on operating system with less than 1% pressure loss upstream:
  8. Drains
    1. Provide duct drains in the bottom of all main and branch ducts larger than 12 inches in diameter or as shown on the drawings to allow removal of condensate. Drains shall be located at every rise in duct, every 50 feet along a continuous run, and at the heel of all drops.