FAQ

Does ATS have a local representative or factory in my territory?

Representatives: See the maps on pages 3, 4, and 16 for the representative office nearest to you. ATS has representatives in the following locations: i) MD of Korea, serving Korea and China, ii) TIS of Singapore, serving Southeast Asia, iii) GartnerConsult of Germany, serving Europe, UK and Ireland, iv) Bel of Israel, serving Israel, and v) ATS in USA, serving all other locations.

Factories: See the map on page 5 for the current locations of ATS factories and satellite factories: i) ATS USA, ii) ATS Southeast Asia (in Malaysia), iii) Entech of South Korea, iv) Jungang of South Korea, and v) Bel of Israel.

What sizes of duct does ATS make?

ATS manufactures round duct in sizes 2ӯ (50 mm) to 160ӯ (4000 mm). ATS also makes rectangular and oval ductwork. Please see ATS Part Type Drawings in the Mechanical Drawing Guide, Section 3, pages 45-124.

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 FXP™ duct over lined stainless steel?

The advantages of ATS FXP™ 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 hot taps with internal flange
  4. Satellite factories worldwide: Europe, Korea (2), China, Malaysia, and USA.
  5. 100% seal joints.

What is the thickness of ATS FXP™ 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 FXP™ 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 FXP™ duct is made using a layer of synthetic veil, having a resin/reinforcement ratio of 90/10, for maximum corrosion resistance. When manufacturing ATS FXP™, 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 normally be avoided in corrosive environments, especially those with hydrofluoric acid; however, there are exceptions to this rule.

Synthetic veils are normally preferable in corrosive environments, but remember to ask for the corrosion 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.

What happens if a city requires sprinklers in ATS FXP™ duct?

In some cases owners will indicate that they intend on sprinkling ATS FXP™ duct, or an insurance of cial or building of cial will think it is necessary. Please notify ATS staff if this situation arises. In some cases, there is a misunderstanding regarding the superior technical characteristics and approvals that ATS FXP™ ducts enjoy. (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 (sq ft) (8000m2) 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 sq ft (4000 m2) of space.  ATS satellite factories provide an additional 120,000 sq ft (12,000m2) of manufacturing space, making ATS’ total capacity 200,000 sq ft (20,000 m2).

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 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. But when the ramifications of ATS’ modularity are considered, ATS is less costly. ATS can be modified on site, which allows contractors to order ducts before exact layouts are known. There is cost savings in ordering only what you need when you need it. Please refer to “Why ATS? Cost Savings” (pages 12 & 13) for more information.

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

The initial cost of these materials is considerably cheaper than ATS. However, ATS FXP™ ducts are firesafe and do not require sprinklers. On a lifetime basis, when considering sprinklers and their attendant costs (drains, gray water disposal 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 using highly combustible ducts run the risk of disastrous fires.

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 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 FXP™ duct FM-approved below 12” diameter and above 60” diameter?

ATS FXP™ 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 FXP™ 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. (See page 24.)

What is the maximum length of ATS FXP™ 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. ATS 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 have been the standard ATS methods of joining duct. As of 2017, ATS offers ATS Van Stone Flanges™. These are useful when owners/contractors do not wish to hard-bond the ducts and also when joining dissimilar materials, such as connections to PVC, Polypropylene, Regular FRP and Stainless Steel. Since 2005, ATS offers ATS ISO Flanges™ for tool hookup up to 8” (200mm) diameter, and also KF connections. ATS also provides a “Slip Collar Flange” (a flange attached to a slip collar, see ATS Mechanical Drawing Guide, part type #77, pages 88-89). 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 before measurement details are certain.

How do you connect ATS to 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 140.

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.

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 H-Collars and ATS Slip Saddle taps are 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 in a live tab, 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?

Note: See pages 20-21 for a detailed explanation of the FM 4922 standard.

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  re tests, where the duct is connected to a booth containing a heptane pool  re; 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  re source and the temperature cannot exceed 1000°F at that point. Meeting the test requirements allows the duct to be installed without internal  re 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. In this 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 in Standards Section of this Reference Guide, page 192.

To pass FM 4922, a manufacturer must also subject flat samples to the ASTM E-84 and FM 4910 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 test used 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 Guidelines for Hanging ATS FXP™ duct on pages 161-163.   Also, refer to Expansion Joints on pages 228-229.

Can ATS FXP™ duct be reused after installation?

ATS FXP™ duct can be reused after installation. The limiting factor will be determined by the duct’s previous exposure to chemicals. It is imperative that ducts exposed to highly corrosive or dangerous chemicals be handled with care and decontaminated if removed from service. If the duct has had limited challenges and/or its integrity has not been breached, the duct may be reused after proper cleansing if cleansing is necessary. This would be true of all good duct systems.

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

There is no shelf life to ATS FXP™ 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. Careless 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.

How do you get a good seal using the saddle tap?

As of 2015, ATS offers ATS Slip Saddle Taps™. This tap has an internal flange that provides a 100% seal. See part types 43 & 46 in the ATS Mechanical Drawing Guide, pages 74-75.

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. ATS will consider extended warranties when owners have their ducts audited yearly.

What do you recommend at Fire Walls?

NFPA 318-15 STANDARD for the PROTECTION of CLEANROOMS states the following:

9.3.4 Exhaust ducts penetrating fire resistance–rated construction shall be contained in an enclosure of equivalent fire-resistive construction. Fire resistance construction and enclosures with equivalent fire-resistive construction shall extend 1.8m (6 ft) or a distance equivalent to two times the duct diameter, whichever is greater, on either side of the rated construction.

Section 9.3.5:  “Fire dampers shall not be installed in exhaust ducts.”

See additional information on Fire Walls on page 168.