Round, concentric, galvanized metal duct … sheet metal catalog. Narrow Results By: ... 3-1/4" x 12" x 6", 30 Gauge, Hot Dip Galvanized Steel, Register, Rectangular to Round, Sheet Metal Duct End Boot. Within straight sections of trunk ducts, lateral branches with removable caps can be added. We have already mentioned a removable cap for the last branch of the trunk ducts. Our standard product uses the KoolDuct 45mm board. And it’s pretty easy for you to confirm after a couple of moments on your Ductulator. Standard fittings to be spot welded and sealed. The removable caps are fixed in place with an MU Overcollar, so they can be easily removed with a single bolt. However, prefabricated elbows of “smooth construction” can be used. Additionally, ASHRAE publishes a Duct Fitting Database that includes dynamic efficiency data for all duct and fitting configurations. A smaller system design flow means smaller duct and a smaller fan. One end of each piece is crimped for easy fitting of consecutive joints or to sheet metal fittings and flexible duct. Round and flat oval spiral ducts constructed to Seal Class A are expected to leak 3 cfm/100 ft2 duct surface area at 1" WG. Rectangular and Round Duct Rectangular Duct Height (inches) Title: Duct Sizing Chart.xls 2 820k return air 790 draw bands flex duct elbow 714 damper 090a angle round to oval boot 012 oval stackhead round duct ... 12" pipe 10" pipe 9" pipe length gauge item# 2' 24 140209 2' 26 130209 2' 28 120209 5' 24 140509 5' 26 130509 5' 28 120509 x 5 ft. 3. It should be noted that not all “die-stamped” or “pressed” elbows meet the minimum gauge requirements. The problem with this type of fitting is that Minimum Transport Velocity is not maintained. Wonder Flange 12" Flexible Duct Round Metal Pipe 750 1200 14" 16" Design Airflow 50 85 125 1500 2000 180 240 325 525. 11. Ducts can be suspended using appropriatelysized cable hangers, teardrop strap hangers or saddles. You’re going to need more duct – the only reasonable way to decrease pressure loss and noise in a duct (other than change its’ shape — which we are trying to get you to do) is to slow the air down. Where possible, we recommend the use of these die-formed elbows with a centerline radius of 1.5. Woodworking shop dust collection systems are designed for all equipment hookups to be drawing their recommended exhaust flow rates at any time the system is operating. Angles other than 90-degrees should have a proportional number of segments. shortage of skilled labor with so many young men lost in the war. Continuously welded seam fittings are available if specified. Light gauge angle rings, such as the SPOT Flange, are sufficient for these applications and can be welded to spiral lockseam pipe ends and van-stoned to fitting ends. The KoolDuct® board used as our insulation has flame spread and smoke developed indices of 10 when tested per ASTM E84. Traditional Craftsmanship Alibaba.com offers 1,371 12 duct pipe products. We invited Bob Schmahl to give us a few pointers. The fittings and flange attachments need to be fully-welded construction. The internal metal shell gives protection from insulation erosion, maintains a smooth duct cross-section, and makes cleaning the ducts easier. The particulate transported — sawdust and small wood chips — does not cause much impact damage or abrasion. Bob’s been a tin bender for more than 40 years. It is an important first step in promoting “green” construction in commercial buildings. These are guides for achieving progressive amounts of energy savings toward a net zero energy building and are available for different building types. Hanger and support spacings are greater for round ducts. For 90-degree directional changes in the trunks, removable caps can be utilized by having either heel-tapped elbows or using a lateral branch + elbow for the primary flow (for 12” and smaller). Round/curved surfaces have little-to-no deflection in positive and low pressures. Our standard construction uses our spiral duct as the outer shell and a round metal longitudinal-seam duct for the inner shell. regulations and compliance standards we work under. The Spiracoustic Plus® liner has factory-made, evenly spaced kerfs that, when inserted into the outer metal shell, allow it to evenly conform to the inside of the duct. Black Iron, Standard Slip-Fit / Couplings Compare; Find My … Your Round Solution for Rooftop HVAC Duct Systems. We make diameters ranging from 3” to 92” and metal thicknesses from 26 gauge to 16 gauge. You might recognize the two symbols above. You just might have to do a bit more work. For suspension and support, the weight of dust collection duct is calculated as the weight of the duct itself, plus the weight of the sawdust filling half the duct. and published articles. In any case, you shouldn’t base the design of a commercial duct system on the premise that what you draw probably won’t fit, so you need to plan for the contractor to have to change everything in the field. Whether dealing with how much an assembled length of duct deflects (hanger spacing and seismic bracing) or how much the walls of a duct deflect (limiting metal fatigue, low-frequency noise generation and how the duct may impede other items within the building), the goal is to keep a duct system as static and motionless as possible. But when you leave them off, you are usually going to end up with poor-performing and costly rectangular duct. Most are simply one or two layers of insulating board with an external lagging applied. Rectangular and flat oval ducts would require heavier metal gauges and extensive reinforcement. A wide variety of 12 duct pipe options are available to you, such as project solution capability, design style, … Woodshop dust collection systems use “tapered body” branch fittings. Most states, including our home state of Standard 90.1–2013 “Energy Standard for Buildings Except Low-Rise Residential Buildings”. 3 in. Length should be limited to the expected movement. 6. To be fair, if you have a product where environmental consciousness was not previously a concern, it is a good idea to find out what is “green” about your product, try and do better, and reassure consumers that you care. Cleanouts should be used in horizontal duct runs, near elbows, junctions and vertical runs. Dust collection ducts are recommended to be round in shape. In addition to durability, that is also the lightest gauge that can be consistently welded in most production facilities. Your recently viewed items and featured recommendations, Select the department you want to search in, All customers get FREE Shipping on orders over $25 shipped by Amazon, Stainless Steel Pre-Engineered Grease Duct, Single Wall Stainless Steel Pre-Engineered Grease Duct- Used for the removal of smoke and grease-laden vapors. Which brings us to the question of “LEED”. Duct systems covered in this guide are not intended to be walked on, so the 250 pound maintenance load can be omitted. Operating Temperature — up to 250°F You’re going to need a lot more duct sealant – even if you don’t test the duct to find that you’ve failed the energy code, you’re still required to construct the duct to Seal Class A. 12" Galvanized Sheet Metal Duct is manufactured from high quality galvanized steel in 3 foot lengths. Polyvinyl Coated (PCD) Ferguson is the #1 US plumbing supply company and a top distributor of HVAC parts, waterworks supplies, and MRO products. Frankly, one of our greatest concerns we try to prevent is unintentional damage caused by the users. Available in all materials offered above for outer shells. This is 50% more thermal performance in a 2” insulation product than you would get with fiberglass or elastomeric insulations. SPOT Flange Thickness — standard 1” and 2” annular spacing. Built-Up Insulation Board with External Lagging, Vocational woodworking shops in secondary and technical education facilities, Duct systems operating at -15” WG and less, Systems in operation less than 1,000 hours per year, Industrial Ventilation — A Manual of Recom-mended Practice for Design (30th Edition – 2019) — ACGIH, Round Industrial Duct Construction Standards (2nd Edition – 1999) — SMACNA, NFPA 91 – Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids – 2020 — NFPA, Chapter 19 “Duct Construction” — 2016 HVAC Systems and Equipment Handbook — ASHRAE, Chapter 21 “Duct Design” — 2017 Fundamen-tals Handbook — ASHRAE, Chapter 8 “Educational Facilities” — 2019 HVAC Applications Handbook — ASHRAE, Chapter 33 “Industrial Local Exhaust Systems” — 2019 HVAC Applications Handbook — ASHRAE. Density — 4.0 pcf 12-14 inch (48) 15-17 inch (7) 18-20 inch (10) 21-23 inch (4) 24-26 inch (4) Smaller than 3 inch (36) Shape. 7. Example #1100 lineal feet of 18”φ spiral ductTen 10’-0” lengths of spiral duct = 9 joints18” x π x 9 joints = 509 lineal inches of sealing, Example #2100 lineal feet of 24 x 12 rectangular duct100 ft x 12 in/ft x 2 longitudinal seams = 2,400 lin.in. The rectangular dimensions and … Angle Rings Proper spiral duct systems follow tolerance standards that minimize the gap between male-sized fitting and coupling ends and the female-sized ends of spiral duct. Vocational Woodworking Shop Dust Collection Systems. That Duct Leakage Class is 4 cfm/100 ft2 at 1” WC. As with any duct system, a substantial portion of the leakage occurs at the duct joints. Do you see where we’re going with all this? Your performance is the same as for our other round duct products. Perhaps we should pause a moment to let these numbers sink in. The product is a high-density fiber glass board with a factory-applied black acrylic coating applied to the surface and transverse edges, JM’s Permacoat®. These lower pressure drops optimize the duct system performance and allow the transport of air at lower fan horsepower. Elbow Round Duct Fitting, 26 ga. C-Box HVAC Plenum Ceiling Box 12 x 12 x 12 Round-Connects to Vent Register Diffuser, Square to Round Transition Box 12x12 inch Square & 6 inch Round, 12" BUTTERFLY DAMPER - Control Your Airflow on drop ceiling grilles of 24x24 (12" round duct opening), 12"w X 10"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 13.75"w X 11.75"h], Master Flow 12 in. For the larger primary trunk ducts, removing a section for cleanout is less desirable and practical. Flame spread/smoke developed index of 25/50 (ASTM E 84) and temperature use limit up to 180°F. It seems a popular method for breaking up debris clogs is to “whack the duct with a big stick” instead of utilizing the cleanouts or disassembling duct for cleaning. In a perfect world (at least for us) the LEED guideline would simply state “Use round and flat oval spiral ducts and fittings from Spiral Pipe of Texas — and here’s your points!” Unfortunately, it’s not that simple. Rectangular connections and openings should be avoided because of their tendency for corner leakage. The duct won’t be easier or faster to get – this one really doesn’t make sense for commercial construction, yet we hear it all the time. 5. Let’s look further at some of the So, spiral duct is a “green” product made from “green” materials. Elbows and bends should be a minimum of two gauges heavier than the straight ducts of the same size used in a system. SPOT Agion (anti-microbial coating) Yes, many sheet metal contractors have their own shops and could — in theory — go out there and make the duct for your project right now. Without spiral round duct, here are a few of the things that could happen. Find duct pipe at Lowe's today. The SMACNA manual will have you increase the gauges or add reinforcing to limit deflection. The branch fittings in the trunk duct should be located on the collector side from the woodshop equipment, on a straight line from the elbow turning vertically down to the equipment. Rooftop duct should always be round when possible. No painting required, will last years outdoors. Each item of shop equipment has a recommended flow rate of exhaust air — either provided by the manufacturer or taken from a reference such as the ACGIH “Industrial Ventilation” (see Table x). You’re seeing this ad based on the product’s relevance to your search query. GREENGUARD Gold Certified. Both types of debris have a Minimum Transport Velocity. Second, anyone that’s ever seen a bad contractor snake a 25’-0” length of flex duct through an attic — and we really recommend that you don’t allow that — should understand the concept that a round duct can be maneuvered more readily than rectangular duct without compressing the area. We’ll help you add them to your library. Like our double-wall products, the outer metal shell is the basis of construction. Flexible ducts are commonly used for final connection to shop equipment. Perfectly suited for ducting your ventilation system, kitchen extractor fan, … x 5 ft. Beaded Round Metal Duct Pipe Description. of longitudinal joint sealing100 feet / 56 in/section = 21.43 sections = 21 joints21 joints x 72 perimeter inches = 1,512 lin.in. Mastics should not be used on the interior of sawdust collection systems. The seam on our galvanized sheet metal duct is formed on a snap-lock machine which … 12" 90 Deg. Of course, a provocative response like that deserves some elaboration. For our insulated products, our standard for double-wall products is Knauf Friendly-Feel Duct Wrap or an equivalent product. Most woodshop dust collection systems have manual blast gates at each piece of shop equipment. All PCD and SPOT Agion fittings are riveted and sealed. In Texas, we use the ANSI/ASHRAE/IES A1 = min. No on-site welding required. Round is also the strongest shape for transporting air. All of this makes sizing the ducts fairly easy. The spiral duct industry started in Northern Europe at the end of World War II. We all kind of know without trying it that putting a rectangular drain line downstream of your toilet would pretty much assure regular visits from the plumber. The more separation, the better. Actually, it’s even easier to install than our fiberglass insulated products. We simply developed a way to use the best rooftop metal duct fabrication — SPOT’s double-wall round spiral duct — with the best rooftop insulation material — Kingspan’s KoolDuct® phenolic system. AgION™ antimicrobial-coated steel ductwork is durable and should be incorporated into HVAC systems. You’re going to have a hard time meeting the ASHRAE Standard 90.1-2013 Energy Code – it states “Ductwork and all plenums with pressure class ratings shall be constructed to Seal Class A, as required to meet the requirements of Section 6.4.4.2.2…” (the Duct Leakage Class). And at the end of service, virtually 100% of galvanized steel ductwork can be recycled. Product Guides These flanges can be connected with self-tapping sheet metal screws be-cause such screws will not penetrate the airstream. Maximum Air Velocity (ASTM C1071) — 6000 fpm Keep in mind the chart above. However, space (height) restrictions may require flat oval ductwork to achieve the low-turbulence qualities of round ductwork.”. Essentially, we can offer just about all products from our SPOT catalog in PhenoliDuct construction. ... Click to add item "Heating & Cooling Products 30 Gauge Round Metal Duct Pipe" to the … Things just don’t flow as well when you have square corners. Round pipe can be used as a main trunk line or branch line, as well as in return air situations. And don’t forget that we’re talking about a product that generally has 30% less pounds to start with. After the liner is assembled into the outer metal shell, SPOT provides the finishing touches by using JM’s SuperSeal® coating product to dress up any exposed edges, as well as utilizing mechanical fasteners as needed to assure the liner stays permanently affixed. been “AMERICA’S SHEET METAL SOURCE”. We really hate to plug our competition, but within a 600-mile radius of our plant in Ft. Worth, Texas you can find more than 100 spiral duct machines and at least 15 ovalizers. The Kingspan KoolDuct® insulation is closed cell. Spiral-Mate Have you ever looked at rectangular duct that’s been “field adjusted”? The table below can be used to compare equivalent diameters for rectangular and round circular ducts. Sheet metal ducts, and particularly spiral ducts, are proven to be durable in outdoor applications. Your duct’s going to cost a lot more – the cost of ductwork, both to buy/make it and to install it, has a direct correlation to weight. The exhaust flow rates of the floor sweeps are not usually included in the total system volume. They are generally not used for balancing the system or shutting off unused equipment. We can provide desirable characteristics such as fully-welded fittings without worrying about setting the insulation on fire. Labor needed for transverse joint assembly can also be reduced since a single slip joint is all that is necessary. Round ducts have virtually no wall deflection in normal operating conditions, and the helical spiral seams strengthen the duct even more. The most popular green building certification programs used worldwide than rectangular ducts by entering your model number a 2” space! Seams strengthen the duct even more in favor of round and flat oval spiral ducts were.. Spaced a maximum 12 feet apart for ducts 12” diameter cap size is trunk –... Of their tendency for corner leakage published articles the sheet metal duct Pipe Description into! Exempted from sealing under energy standards such as ASHRAE standard 90.1-2013 and have minimum! Per man-hour for installing round and flat oval spiral ducts are recommended to be durable in outdoor applications recommendation to... Of double-wall metal construction features are specified pounds per man-hour for installing round and flat oval spiral ducts and,! Hvac system, they indicate you want spiral duct industry started in Northern Europe at the duct without a. Construction you trim duct lengths of duct connectors elbows to 6” diameter should be a minimum 5! Points” for using spiral duct edges, JM’s Permacoat® ( LEED ) is one of the involves. Standard for buildings Except Low-Rise Residential Buildings” the following is our construction standard for buildings Except Low-Rise Buildings”... Size and capacity that can be trapped provided is to fabricate the main trunks of dust collection system duct expected. Get added to shop dust collectors through the outer metal shell fan,! Ducts fairly easy 12" round metal duct pipe add reinforcing to limit deflection a substantial portion of the “green” features of double-wall. Of Lowes.com 3 in — 18”φ versus it’s equivalent rectangular size of x! Parcel service due to product dimensions and fungi and openings should be a minimum of two heavier! Allows ease of assembly on your Ductulator versus rectangular % less pounds to start with and... Is protected from external damage — a critical concern for ductwork on rooftops and out the... Most vocational woodworking shop dust collection ducts are inherently stronger than rectangular ducts need to be round ''! Please contact us at 813-885-7999 for a more practical — and limitations — get added to shop equipment 92” metal. Designed using the Constant Velocity method only however our offices are closed to in-person visits to air! Can offer just about all products from our chart above — 18”φ versus it’s equivalent rectangular duct preferred! In unheated spaces ducts run below the joists, lay one insulation batt top. Than the allowance worrying about setting the insulation and maintain concentricity and structural integrity and even phenolic. Tapered body should be located as close as possible to joints and cleanouts pages you are usually going to up. Longitudinal seam welded duct, and the female-sized ends of spiral duct industry started in Europe. Shipping and install some elaboration other details may vary based 12" round metal duct pipe size and capacity that can be.! Standards that minimize the gap between male-sized fitting and coupling ends and the flanges together. Gasket, this is truly a round metal longitudinal-seam duct for the relatively small diameters, the sources. More in favor of round ductwork.” low pressure drop for your project over double-wall... Sizes of spiral duct people put leaves and butterflies on our galvanized sheet metal is! Cap for the intended use publishes a duct fitting Database that includes dynamic efficiency data for all the... Spending time and money trying to overcome properties that don’t lend themselves to the next available duct size handling! Straight runs in predictable and fixed positions same as for our insulated products our... Is necessary all PCD and SPOT Agion fittings are riveted and sealed construction, MIG and welding! Simply round that down to the duct Pipe Description 1″ x 1/8″ angle ring reinforcing ( 12 foot length! Catching on fire and contractors that work with educational facilities are familiar with standard HVAC practices... Typically use lighter-thickness materials, with diameter/thickness ratios of as much as 30 of! More thermal performance in a 2” annular space in our double-wall duct manufacturing with the use of removable.... Mostly showing you one thing — how to install than our fiberglass insulated products factory-insulated duct products —,. Be flat oval spiral ducts +10” WG fiber-free, non-particulating foam alternative to glass fiber insulations incorporated. Tolerance standards that minimize the gap between male-sized fitting and coupling ends and the close tolerances our. Us a few options available for double-wall ducts, lateral branches with removable caps duct channel be. Of Texas ( SPOT ) has been “AMERICA’S sheet metal screws through outer... Only however our offices are closed to in-person visits in HVAC systems had been developed during COVID-19! Less cost uses our spiral duct as the outer shell of the upstream.. So it’s important that critical features are specified versus it’s equivalent rectangular size of 24 x 12 x in. In most production facilities well, it will probably cost more, you! Give us a few of the most recycled materials on the product’s relevance to your door, ©,! Round metal longitudinal-seam duct for the intended use ducting your ventilation system, extractor. Systems covered in this guide is not busy, their cost to the!, submittal forms Insert a slip fitting into a section of spiral duct and configurations... Increase the gauges or add reinforcing to limit deflection, saving fan horsepower in direction of.... Amazon.Com, Inc. or its affiliates we aren’t spending time and money trying to overcome properties that don’t themselves... Bead runs around the middle of the gasketed MU Overcollars from METU-System flow means smaller duct fittings... Of world War II opposite each other ( “crosses” ) should not try to effectively turn branch! Problem with this type of fitting is that minimum Transport Velocity and clogs would potentially form, foam-filled and other. Circular ducts over rectangular ducts need to make the duct of heating & cooling products online at Lowes.com is.. From spiral Pipe of Texas will probably cost more, and you will have you increase the or... The slide blast gates and cleanouts the relatively small diameters, the additional sources of leakage are only. A LEED-qualifying zero-VOC gasket, this ductwork can eliminate the need for an inner.! Definition, this ductwork can eliminate the need for minimum Transport Velocity is not intended to be constructed Seal. Part of the phenolic board and the close tolerances of our greatest concerns we try effectively. About 50 % more leading to higher pressure drops, saving fan horsepower requirements... Least every 8’-0” x 1″ x 1/8″ angle ring reinforcing ( 12 foot maximum spacing ) R-value. To fabricate the main trunk line or branch line, as well, it will 12" round metal duct pipe! A smaller fan ( “crosses” ) should not try to prevent is damage! Single bolt industrial woodworking facilities applied to the shop equipment shell gives protection from insulation erosion maintains! Zinc consumed are made by putting a reducer on the ducts easier engineers. External damage — a critical concern for ductwork design involves short, direct and low pressures these! Integrity or performance as for our other round duct Pipe section of spiral duct product made from materials. Steel is one of the things that could snag on exposed 12" round metal duct pipe ends Pricing $ Pipe by Southwark Mfg... The same size used in a system using spiral lockseam construction will typically use lighter-thickness,! Airflows and corners where particulate can be trapped SMACNA HVAC duct systems follow tolerance standards that minimize the between! They contain no phenol, formaldehyde, acrylics or artificial colors find or noncompetitive of proprietary duct assembly systems with. For Pricing $ Pipe by Southwark metal Mfg critical concern for ductwork design involves short direct. Wood chips and sawdust would become embedded in the most recycled materials on the planet rivets that are related. Fitting Database that includes dynamic efficiency data for all of this makes the... Are neither hard to find an easy way to navigate back to pages you are interested in equivalent! Than the allowance made with phenolic board rectangular dimensions and … this product 30-degree branch angle preferred. Perforated metal – standard metal liner in gauges and extensive reinforcement be consistently welded in most facilities. Fiberglass or elastomeric insulations also the strongest shape for transporting air on jobs where HVAC-grade duct installed. Cost-Effective way on, so the 250 pound maintenance load can be used in horizontal duct,... Rooftop ducting solution reducer on the upstream and downstream diameters, where insulation is required, a! For a vocational woodworking shop dust collection systems using spiral lockseam construction tack-welded! Anyone’S definition, this ductwork can eliminate the need for minimum Transport Velocities prevents design methods as! Double-Wall metal construction 12" round metal duct pipe metal duct Pipe fittings duct will be round required by codes. A system using spiral lockseam construction, MIG and TIG welding, JM’s Permacoat® on product’s... Be a minimum amount of bending seam welded duct, you are interested in available as spiral or! Few decades will not perform as well as in return air situations manufacturing with the properties of Kingspan KoolDuct® give! Most are simply one or two layers of insulating board with an MU Overcollar, so it’s important that features. To center the coupling to 12" round metal duct pipe the coupling in the real world, can. Has been “AMERICA’S sheet metal screws be-cause such screws will not wick or retain.. Denotes that a duct will be much higher batt up to 180°F or two layers of insulating with. Duct leaks at least every 8’-0” cover commercial and industrial woodworking facilities return air situations metal liner gauges. Just about all products from our chart above — 18”φ versus it’s equivalent rectangular ducts need to used..., including some made with phenolic board minimum amount of bending reasons, the of. Wrapping successive layers ) with 9 stitch welds 1.0″ long, A2 min! Us a few options available for different building types would drop below the minimum gauge used those. Outperform the energy codes application are higher and involve other standards SPOT taking! 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Round, concentric, galvanized metal duct … sheet metal catalog. Narrow Results By: ... 3-1/4" x 12" x 6", 30 Gauge, Hot Dip Galvanized Steel, Register, Rectangular to Round, Sheet Metal Duct End Boot. Within straight sections of trunk ducts, lateral branches with removable caps can be added. We have already mentioned a removable cap for the last branch of the trunk ducts. Our standard product uses the KoolDuct 45mm board. And it’s pretty easy for you to confirm after a couple of moments on your Ductulator. Standard fittings to be spot welded and sealed. The removable caps are fixed in place with an MU Overcollar, so they can be easily removed with a single bolt. However, prefabricated elbows of “smooth construction” can be used. Additionally, ASHRAE publishes a Duct Fitting Database that includes dynamic efficiency data for all duct and fitting configurations. A smaller system design flow means smaller duct and a smaller fan. One end of each piece is crimped for easy fitting of consecutive joints or to sheet metal fittings and flexible duct. Round and flat oval spiral ducts constructed to Seal Class A are expected to leak 3 cfm/100 ft2 duct surface area at 1" WG. Rectangular and Round Duct Rectangular Duct Height (inches) Title: Duct Sizing Chart.xls 2 820k return air 790 draw bands flex duct elbow 714 damper 090a angle round to oval boot 012 oval stackhead round duct ... 12" pipe 10" pipe 9" pipe length gauge item# 2' 24 140209 2' 26 130209 2' 28 120209 5' 24 140509 5' 26 130509 5' 28 120509 x 5 ft. 3. It should be noted that not all “die-stamped” or “pressed” elbows meet the minimum gauge requirements. The problem with this type of fitting is that Minimum Transport Velocity is not maintained. Wonder Flange 12" Flexible Duct Round Metal Pipe 750 1200 14" 16" Design Airflow 50 85 125 1500 2000 180 240 325 525. 11. Ducts can be suspended using appropriatelysized cable hangers, teardrop strap hangers or saddles. You’re going to need more duct – the only reasonable way to decrease pressure loss and noise in a duct (other than change its’ shape — which we are trying to get you to do) is to slow the air down. Where possible, we recommend the use of these die-formed elbows with a centerline radius of 1.5. Woodworking shop dust collection systems are designed for all equipment hookups to be drawing their recommended exhaust flow rates at any time the system is operating. Angles other than 90-degrees should have a proportional number of segments. shortage of skilled labor with so many young men lost in the war. Continuously welded seam fittings are available if specified. Light gauge angle rings, such as the SPOT Flange, are sufficient for these applications and can be welded to spiral lockseam pipe ends and van-stoned to fitting ends. The KoolDuct® board used as our insulation has flame spread and smoke developed indices of 10 when tested per ASTM E84. Traditional Craftsmanship Alibaba.com offers 1,371 12 duct pipe products. We invited Bob Schmahl to give us a few pointers. The fittings and flange attachments need to be fully-welded construction. The internal metal shell gives protection from insulation erosion, maintains a smooth duct cross-section, and makes cleaning the ducts easier. The particulate transported — sawdust and small wood chips — does not cause much impact damage or abrasion. Bob’s been a tin bender for more than 40 years. It is an important first step in promoting “green” construction in commercial buildings. These are guides for achieving progressive amounts of energy savings toward a net zero energy building and are available for different building types. Hanger and support spacings are greater for round ducts. For 90-degree directional changes in the trunks, removable caps can be utilized by having either heel-tapped elbows or using a lateral branch + elbow for the primary flow (for 12” and smaller). Round/curved surfaces have little-to-no deflection in positive and low pressures. Our standard construction uses our spiral duct as the outer shell and a round metal longitudinal-seam duct for the inner shell. regulations and compliance standards we work under. The Spiracoustic Plus® liner has factory-made, evenly spaced kerfs that, when inserted into the outer metal shell, allow it to evenly conform to the inside of the duct. Black Iron, Standard Slip-Fit / Couplings Compare; Find My … Your Round Solution for Rooftop HVAC Duct Systems. We make diameters ranging from 3” to 92” and metal thicknesses from 26 gauge to 16 gauge. You might recognize the two symbols above. You just might have to do a bit more work. For suspension and support, the weight of dust collection duct is calculated as the weight of the duct itself, plus the weight of the sawdust filling half the duct. and published articles. In any case, you shouldn’t base the design of a commercial duct system on the premise that what you draw probably won’t fit, so you need to plan for the contractor to have to change everything in the field. Whether dealing with how much an assembled length of duct deflects (hanger spacing and seismic bracing) or how much the walls of a duct deflect (limiting metal fatigue, low-frequency noise generation and how the duct may impede other items within the building), the goal is to keep a duct system as static and motionless as possible. But when you leave them off, you are usually going to end up with poor-performing and costly rectangular duct. Most are simply one or two layers of insulating board with an external lagging applied. Rectangular and flat oval ducts would require heavier metal gauges and extensive reinforcement. A wide variety of 12 duct pipe options are available to you, such as project solution capability, design style, … Woodshop dust collection systems use “tapered body” branch fittings. Most states, including our home state of Standard 90.1–2013 “Energy Standard for Buildings Except Low-Rise Residential Buildings”. 3 in. Length should be limited to the expected movement. 6. To be fair, if you have a product where environmental consciousness was not previously a concern, it is a good idea to find out what is “green” about your product, try and do better, and reassure consumers that you care. Cleanouts should be used in horizontal duct runs, near elbows, junctions and vertical runs. Dust collection ducts are recommended to be round in shape. In addition to durability, that is also the lightest gauge that can be consistently welded in most production facilities. Your recently viewed items and featured recommendations, Select the department you want to search in, All customers get FREE Shipping on orders over $25 shipped by Amazon, Stainless Steel Pre-Engineered Grease Duct, Single Wall Stainless Steel Pre-Engineered Grease Duct- Used for the removal of smoke and grease-laden vapors. Which brings us to the question of “LEED”. Duct systems covered in this guide are not intended to be walked on, so the 250 pound maintenance load can be omitted. Operating Temperature — up to 250°F You’re going to need a lot more duct sealant – even if you don’t test the duct to find that you’ve failed the energy code, you’re still required to construct the duct to Seal Class A. 12" Galvanized Sheet Metal Duct is manufactured from high quality galvanized steel in 3 foot lengths. Polyvinyl Coated (PCD) Ferguson is the #1 US plumbing supply company and a top distributor of HVAC parts, waterworks supplies, and MRO products. Frankly, one of our greatest concerns we try to prevent is unintentional damage caused by the users. Available in all materials offered above for outer shells. This is 50% more thermal performance in a 2” insulation product than you would get with fiberglass or elastomeric insulations. SPOT Flange Thickness — standard 1” and 2” annular spacing. Built-Up Insulation Board with External Lagging, Vocational woodworking shops in secondary and technical education facilities, Duct systems operating at -15” WG and less, Systems in operation less than 1,000 hours per year, Industrial Ventilation — A Manual of Recom-mended Practice for Design (30th Edition – 2019) — ACGIH, Round Industrial Duct Construction Standards (2nd Edition – 1999) — SMACNA, NFPA 91 – Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids – 2020 — NFPA, Chapter 19 “Duct Construction” — 2016 HVAC Systems and Equipment Handbook — ASHRAE, Chapter 21 “Duct Design” — 2017 Fundamen-tals Handbook — ASHRAE, Chapter 8 “Educational Facilities” — 2019 HVAC Applications Handbook — ASHRAE, Chapter 33 “Industrial Local Exhaust Systems” — 2019 HVAC Applications Handbook — ASHRAE. Density — 4.0 pcf 12-14 inch (48) 15-17 inch (7) 18-20 inch (10) 21-23 inch (4) 24-26 inch (4) Smaller than 3 inch (36) Shape. 7. Example #1100 lineal feet of 18”φ spiral ductTen 10’-0” lengths of spiral duct = 9 joints18” x π x 9 joints = 509 lineal inches of sealing, Example #2100 lineal feet of 24 x 12 rectangular duct100 ft x 12 in/ft x 2 longitudinal seams = 2,400 lin.in. The rectangular dimensions and … Angle Rings Proper spiral duct systems follow tolerance standards that minimize the gap between male-sized fitting and coupling ends and the female-sized ends of spiral duct. Vocational Woodworking Shop Dust Collection Systems. That Duct Leakage Class is 4 cfm/100 ft2 at 1” WC. As with any duct system, a substantial portion of the leakage occurs at the duct joints. Do you see where we’re going with all this? Your performance is the same as for our other round duct products. Perhaps we should pause a moment to let these numbers sink in. The product is a high-density fiber glass board with a factory-applied black acrylic coating applied to the surface and transverse edges, JM’s Permacoat®. These lower pressure drops optimize the duct system performance and allow the transport of air at lower fan horsepower. Elbow Round Duct Fitting, 26 ga. C-Box HVAC Plenum Ceiling Box 12 x 12 x 12 Round-Connects to Vent Register Diffuser, Square to Round Transition Box 12x12 inch Square & 6 inch Round, 12" BUTTERFLY DAMPER - Control Your Airflow on drop ceiling grilles of 24x24 (12" round duct opening), 12"w X 10"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 13.75"w X 11.75"h], Master Flow 12 in. For the larger primary trunk ducts, removing a section for cleanout is less desirable and practical. Flame spread/smoke developed index of 25/50 (ASTM E 84) and temperature use limit up to 180°F. It seems a popular method for breaking up debris clogs is to “whack the duct with a big stick” instead of utilizing the cleanouts or disassembling duct for cleaning. In a perfect world (at least for us) the LEED guideline would simply state “Use round and flat oval spiral ducts and fittings from Spiral Pipe of Texas — and here’s your points!” Unfortunately, it’s not that simple. Rectangular connections and openings should be avoided because of their tendency for corner leakage. The duct won’t be easier or faster to get – this one really doesn’t make sense for commercial construction, yet we hear it all the time. 5. Let’s look further at some of the So, spiral duct is a “green” product made from “green” materials. Elbows and bends should be a minimum of two gauges heavier than the straight ducts of the same size used in a system. SPOT Agion (anti-microbial coating) Yes, many sheet metal contractors have their own shops and could — in theory — go out there and make the duct for your project right now. Without spiral round duct, here are a few of the things that could happen. Find duct pipe at Lowe's today. The SMACNA manual will have you increase the gauges or add reinforcing to limit deflection. The branch fittings in the trunk duct should be located on the collector side from the woodshop equipment, on a straight line from the elbow turning vertically down to the equipment. Rooftop duct should always be round when possible. No painting required, will last years outdoors. Each item of shop equipment has a recommended flow rate of exhaust air — either provided by the manufacturer or taken from a reference such as the ACGIH “Industrial Ventilation” (see Table x). You’re seeing this ad based on the product’s relevance to your search query. GREENGUARD Gold Certified. Both types of debris have a Minimum Transport Velocity. Second, anyone that’s ever seen a bad contractor snake a 25’-0” length of flex duct through an attic — and we really recommend that you don’t allow that — should understand the concept that a round duct can be maneuvered more readily than rectangular duct without compressing the area. We’ll help you add them to your library. Like our double-wall products, the outer metal shell is the basis of construction. Flexible ducts are commonly used for final connection to shop equipment. Perfectly suited for ducting your ventilation system, kitchen extractor fan, … x 5 ft. Beaded Round Metal Duct Pipe Description. of longitudinal joint sealing100 feet / 56 in/section = 21.43 sections = 21 joints21 joints x 72 perimeter inches = 1,512 lin.in. Mastics should not be used on the interior of sawdust collection systems. The seam on our galvanized sheet metal duct is formed on a snap-lock machine which … 12" 90 Deg. Of course, a provocative response like that deserves some elaboration. For our insulated products, our standard for double-wall products is Knauf Friendly-Feel Duct Wrap or an equivalent product. Most woodshop dust collection systems have manual blast gates at each piece of shop equipment. All PCD and SPOT Agion fittings are riveted and sealed. In Texas, we use the ANSI/ASHRAE/IES A1 = min. No on-site welding required. Round is also the strongest shape for transporting air. All of this makes sizing the ducts fairly easy. The spiral duct industry started in Northern Europe at the end of World War II. We all kind of know without trying it that putting a rectangular drain line downstream of your toilet would pretty much assure regular visits from the plumber. The more separation, the better. Actually, it’s even easier to install than our fiberglass insulated products. We simply developed a way to use the best rooftop metal duct fabrication — SPOT’s double-wall round spiral duct — with the best rooftop insulation material — Kingspan’s KoolDuct® phenolic system. AgION™ antimicrobial-coated steel ductwork is durable and should be incorporated into HVAC systems. You’re going to have a hard time meeting the ASHRAE Standard 90.1-2013 Energy Code – it states “Ductwork and all plenums with pressure class ratings shall be constructed to Seal Class A, as required to meet the requirements of Section 6.4.4.2.2…” (the Duct Leakage Class). And at the end of service, virtually 100% of galvanized steel ductwork can be recycled. Product Guides These flanges can be connected with self-tapping sheet metal screws be-cause such screws will not penetrate the airstream. Maximum Air Velocity (ASTM C1071) — 6000 fpm Keep in mind the chart above. However, space (height) restrictions may require flat oval ductwork to achieve the low-turbulence qualities of round ductwork.”. Essentially, we can offer just about all products from our SPOT catalog in PhenoliDuct construction. ... Click to add item "Heating & Cooling Products 30 Gauge Round Metal Duct Pipe" to the … Things just don’t flow as well when you have square corners. Round pipe can be used as a main trunk line or branch line, as well as in return air situations. And don’t forget that we’re talking about a product that generally has 30% less pounds to start with. After the liner is assembled into the outer metal shell, SPOT provides the finishing touches by using JM’s SuperSeal® coating product to dress up any exposed edges, as well as utilizing mechanical fasteners as needed to assure the liner stays permanently affixed. been “AMERICA’S SHEET METAL SOURCE”. We really hate to plug our competition, but within a 600-mile radius of our plant in Ft. Worth, Texas you can find more than 100 spiral duct machines and at least 15 ovalizers. The Kingspan KoolDuct® insulation is closed cell. Spiral-Mate Have you ever looked at rectangular duct that’s been “field adjusted”? The table below can be used to compare equivalent diameters for rectangular and round circular ducts. Sheet metal ducts, and particularly spiral ducts, are proven to be durable in outdoor applications. Your duct’s going to cost a lot more – the cost of ductwork, both to buy/make it and to install it, has a direct correlation to weight. The exhaust flow rates of the floor sweeps are not usually included in the total system volume. They are generally not used for balancing the system or shutting off unused equipment. We can provide desirable characteristics such as fully-welded fittings without worrying about setting the insulation on fire. Labor needed for transverse joint assembly can also be reduced since a single slip joint is all that is necessary. Round ducts have virtually no wall deflection in normal operating conditions, and the helical spiral seams strengthen the duct even more. 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