FAQ

Does ATS have a local representative in my territory?

ATS has representatives (and/or satellite factories) in many states in the USA, and in Korea (MD), China (MD), Singapore (TIS), Malaysia (ATS Asia), Israel (Bel) and Europe (GartnerConsult). For the representative/factory closest to you, please see the map on page _____.

What sizes of duct does ATS make?

We manufacture round duct in sizes 2ӯ (50 mm) to 160ӯ (4000 mm). We also make rect- angular and oval ductwork. Please see ATS Part Type Drawings in the Mechanical Drawing Guide of this Reference Guide (Pages ______) or on our website at www.atsduct.com <http://www.atsduct.com>.

Who are our customers?

ATS’ 4922 FireSafe™, StaticSafe™ and other ducts are used to exhaust corrosive, hazardous or explosive fumes in the following industries:

  1. Semiconductor
  2. Silicon and Gallium Arsenide Wafer manufacturing
  3. Disc Drive/Memory/Storage facilities
  4. Research & Development
  5. University Microelectronics
  6. Pharmaceutical
  7. Wastewater Treatment
  8. Paper and Pulp

What are the advantages of ATS duct over lined stainless steel?

The advantages of ATS duct over lined stainless steel duct include:

  1. flexibility for the contractor to perform modifications on site,
  2. make taps on live operating systems using
  3. 100%-seal taps with internal and external saddle flanges attached at site in minutes
  4. Satellite factories worldwide: Europe, Korea (2), China, Malaysia
  5. 100% seal joints.

What is the thickness of ATS duct corrosion-resistant liner?

NBS Standard PS 15-69 defines the corrosion liner to be that portion of the duct that is made of mat and veil (which has a minimum of a 75/25 ratio of resin/reinforcement).
According to this definition, ATS duct liners are a minimum of approximately 100 mils thick or greater, depending on the diameter of the duct. However, corrosion resistance is most highly dependent on the type of resin used. ATS uses a 50 mil (1.27mm) layer of high-grade vinyl ester resin on the initial liner layer. The innermost surface of ATS duct is made using a double layer of synthetic veil, having a resin/reinforcement ratio of 90/10, for maximum corrosion resistance. When manufacturing ATS 4922 FireSafe™ Duct, ATS always uses synthetic veil and a BPO/DMA cure system for maximum corrosion resistance.

What is the difference between a liner and a veil?

Manufacturers of composite duct commonly refer to a liner as the portion of the duct that forms the corrosion resistant barrier. Corrosion resistance is dependent on the resin used to saturate the reinforcing layers (glass veil, synthetic veil, chopped strand mat, etc.). Some manufacturers refer to halar veil as being an important corrosion barrier, but veils are porous and the liner is still mainly dependent on the resin for its corrosion resistance. Glass veils should be avoided in corrosive environments, especially those with hydrofluoric acid.

Synthetic veils are preferable in corrosive environments, but remember to ask for the cor- rosion resistance test results on the manufacturer’s laminate (resin combined with veil and mat) for accurate evaluations of corrosion resistance.

Does a composite duct with a halar veil mean the duct has a halar liner?

No. A veil alone does not determine the corrosion resistance of a liner. One needs to consider the porosity of veil. In the case of a fiberglass liner, the resin which is used to saturate the veil in the liner is the most important factor in corrosion resistance. (Please note that the ATS DuraSafe™ FRH duct and ATS FRT duct/pipe mentioned in the PRODUCT section of this Reference Guide do NOT use a veil in the liner, but rather employ a solid fluoropolymer film that is impervious to attack.)

What happens if a city requires sprinklers in ATS duct?

In some cases owners will indicate that they intend on sprinkling ATS duct, or an insurance official or building official will think it is necessary. Please notify ATS staff if this situation arises. In some cases, there is a misunderstanding regarding ATS Duct’s technical capabilities. (In other cases, there could be valid reasons for this requirement. For example, the concentration of solvents could be above 10% of the TLV. NOTE: All FM-approved ducts are limited to exhausting vapors from a maximum of one square foot of solvent. )Whatever the situation, ATS staff will help determine the validity of the requirement.

How many square feet of manufacturing space does ATS have worldwide?

ATS itself has a total of 80,000 square feet of manufacturing space worldwide. ATS has two manufacturing locations, one in Richmond, California (near San Francisco) and one in Johor, Malaysia, each with 40,000 square feet (4000 square meters). However, ATS satellite factories have an additional 120,000 square feet (12,000 square meters) of manufacturing space. Total = 20,000m2.

What is ATS’ manufacturing capacity in linear feet of duct per day?

Between the USA and Malaysia ATS has 8 automated and/or computerized winders that produce 1500 lineal feet of duct per day. This can be increased significantly with extra shifts to meet your critical project schedules.

Does ATS install duct?

ATS itself does not install duct. However ATS satellite factories in Korea, China and Israel do installation.

How does the cost of ATS compare on an installed basis to lined stainless steel?

Cost of installation is comparable. However, because ATS can be modified on site, when logistics are considered, ATS is less. ATS is a modular system. Please refer to our Comparison section on page ___ for a more detailed answer to this question.

How does the cost of ATS 4922 FireSafe™ Duct compare on an installed basis to regular FRP, PVC and Polypropylene?

The initial cost of these materials is considerably cheaper than ATS. However, ATS ducts are firesafe and do not require sprinklers. On a lifetime basis, when considering sprinklers and their attendant costs (drains, gray water systems, maintenance, etc.) ATS is more economical Some owners choose not to use sprinkler protection on duct systems made of highly combustible materials like polypropylene. Besides higher insurance premiums, owners run the risk of disastrous fires. See pages _____.

Can I get a price list?

Yes. But, the price list is recommended for budgetary purposes only. This will give you an idea of the cost of the materials, but we recommend that you contact ATS for actual material cost based on a material list. The ultimate cost of the project could be affected by many different reasons, such as lead times, quantity of repetitive pieces, complexity of the order, etc. Our sales staff will analyze these factors and provide you with the lowest most cost effective bid for your project.

Is ATS duct FM-approved below 12” diameter and above 60” diameter?

ATS 4922 FireSafe™ Duct is listed with FM for 10” to 60” diameter. FM does not officially monitor ducts in other sizes. However, Factory Mutual normally “accepts” ATS ducts in all diameters on a job site. If there are any questions on this, ATS can put you in touch with FM’s appropriate field office.

What is the maximum length of ATS duct?

ATS fabricates ducts in 20’-0” (6 meter) lengths. Normally, ATS ships ducts in 10’-0” lengths.

Does ATS offer factory-bonded sections of duct (spooling)?

Yes. ATS is a full service manufacturer and will make the product to your specifications. We will spool duct when customers request it. Spooled orders will take longer to process than regular orders.

Can ATS provide flanged ducts?

Yes. ATS makes flanged ducts on request. The ATS H- Collar™ and/or ATS Slip Collar™ joints are the standard ATS methods of joining duct. Flanges are also useful when joining dissimilar materials, such as connections to PVC, Polypropylene, Regular FRP and Stainless Steel. ATS also provides a “Slip Collar Flange” (a flange attached to a slip collar, see ATS Mechanical Drawing Guide, part type #77). The ATS Slip Collar Flange™ provides the flexibility of installing flanges at the job site. The Slip Collar Flange is convenient, easily installed, and can be ordered even before measurement details are certain.

How do you connect to phenolic composite FRP, regular FRP, PVC, Polypropylene and lined stainless steel?

Connecting ATS to other materials can be done either through the use of flanges. Also, refer to “Joining Dissimilar Materials” section on page ____ of this Reference Guide.

Is there a shelf life for the ChemBond™ resin or ChemBond™ Putty?

The shelf life of ChemBond is 5 years if stored at ambient room temperature, 70°F (21°C) out of sunlight. Be sure to stir the resin prior to use, blending in all sediment that may have separated from the mix and settled to the bottom of the container.

Does the slip collar create a place for liquid to pool on horizontal duct connections?

The slip collar is approximately 1/16 of an inch, about 60 mils, in thickness. Pitching horizontal duct at a slope of 1/4” per foot to a condensate drain (which we recommend) will remove condensate and other liquids from the duct. At this slope angle, there is no room for condensate to collect at the slip collar.

How do you protect the edge of the slip collars?

Slip collars are shipped from the factory with the edges coated with resin to protect from chemical attack.

How do you protect the cut edges of the duct?

ATS’ ChemBond Joining system used with ATS H-Collars and ATS Slip Saddle tap is designed to automatically protect the cut edges of ducts.

Please refer to the Installation Instructions for more details.

How do I prevent dust when cutting duct?

For cutting normal circumferential joints, ATS recommends the use of a Vacuum Saw, which provides a dramatic reduction of dust when cutting. For cutting branch taps, where dust control is critical, ATS recommends a two-person team, one to do the cutting with a jig saw and the other to hold a vacuum near the blade edge.

What is Factory Mutual’s current standard?

See page ___ for a discussion on this point.

FM’s duct standard is FM 4922, which has been in existence since the early 1980s.

FM#4922: In this test, ductwork is subjected to horizontal and vertical fire tests, where the duct is connected to a booth containing a heptane pool fire; a fan is connected to the opposite end of the duct. The flames are drawn into the duct simulating the duct exhausting a burning piece of equipment. To pass, the duct cannot collapse, emit smoke from the exterior, flames cannot be seen at the 23’-6” mark from the fire source and the temperature cannot exceed 1000°F at that point. Meeting the test requirements allows the duct to be installed without internal fire suppression sprinklers. After the initial fire test, a manufacturer can obtain an approval for smoke removal for special purpose areas such as cleanrooms by running a supplementary test, the smoke removal test. The fire is shut off and the air velocity is increased to 2000 feet per minute. The duct receives smoke removal approval if it does not collapse or breach from the fire booth. See diagram on page ___ of this Reference Guide.

To pass FM 4922, a manufacturer must also subject flat samples to the ASTM E-84 and FM 4922 tests. These two additional tests are required.

FM #4910’s standard was created in 1996-7 to insure that all materials that go into clean rooms will have limited combustibility.

FM#4910 an explanation
FMRC Cleanroom Materials Flammability Test Protocol is a series of tests to determine the Fire Propagation Index (FPI) and the Smoke Damage Index (SDI) of materials for use in cleanrooms. The average of the FPI individual peak values is used for classification of non-propagating vs. propagating. An FPI equal to or less than 6 is classified a non-propagating beyond the ignition zone.

The SDI is the product of the yield of smoke, known as the smoke index (SI), and the FPI. The SI values are multiplied by the FPI to derive the SDI. An SDI equal to or less than 0.40 is used as the criterion for significantly limiting smoke concentration.

What do you recommend for relieving stresses in the duct from rooftop or other outdoor installations?

We recommend the installation of expansion joints approximately every 70 lineal feet on straight runs outside the building. These expansion joints are typically made of EPDM, a material with good chemical resistance and UV stability. Of particular importance is the type of hanger or saddle system that is employed. See duct supports, page ____.) Also, refer to the section entitled Expansion Joints on page____.

Can ATS duct be reused after installation?

ATS duct can be reused after installation. The limiting factor will be determined by the duct’s previous exposure to chemicals. It is of course imperative that duct of any type that has been used to exhaust highly corrosive or dangerous chemicals needs to be handled with care and decontaminated if removed from service. If the duct has had limited chal- lenges and/or its integrity has not been breached, the duct may be reused after proper cleansing (if cleansing is necessary).

Is there a shelf life to ATS duct that has not yet been installed?

There is no shelf life to ATS duct. However, it is necessary to store it properly indoors. Duct should not be stored outside. It is important to keep the duct clean and dry. Sloppy handling at job sites can compromise the usefulness of the duct. Duct should not be stacked in a pile—it is recommended, whenever possible, to store duct on its end. If stacking is necessary, it is recommended that the end plates that kept the duct ends in shape during shipment be left in. This will help to resist the weight of duct resting on top.

Does ATS have literature in other languages?

Yes. We have our 4-page brochure, installation instructions and MSDS in French, German, Italian, Japanese, Korean, Old Character Chinese, New Character Chinese, and Spanish. Please see our website at www.atsduct.com <http://www.atsduct.com> to peruse or print copies of the translated literature. Check

How do you get a good seal using the saddle tap? (See page 147)

As of 2016, ATS offers the ATS Slip Saddle Tap. This tap has an internal flange that provides a 100% seal. See page ___.

Does ATS offer a warranty package?

Yes. ATS’ standard warranty is two (2) years, provided the duct is installed in accordance with manufacturers recommendations. Annual inspection service is offered at no cost, the purpose of which is to monitor and maintain the duct system performance.

What do you recommend at Fire Walls?

NFPA 318 STANDARD for the PROTECTION of CLEANROOMS states the following:
Section 3.3.4: “Exhaust ducts penetrating fire resistance-rated construction shall be contained in an enclosure of equivalent fire-resistive construction. Fire resistance construction and enclosure with equivalent fire resistive construction shall extend 6 ft. (1.97 m) or a distance equivalent to two times the duct diameter, whichever is greater, on either side of the rated construction.”

Section 3.3.5: “Fire dampers shall not be installed in exhaust ducts.”

See page ____ for details for fire walls.