What is standard gauge duct?

24 gauge is use for the duct size up to 750 mm (30") and thickness is 0.6 mm. 22 gauge for duct size up to 1200 mm (48") thickness 0.8 mm. 20 gauge for duct size above 1200 mm to 3000 mm (48"-120") thickness 1 mm.

Furthermore, what is gauge of duct?

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Comments	Sheet Metal Gauge	Sheet Thickness (inches)
SMACNA¹⁾ Ductwork	25	0.0218
SMACNA¹⁾ Ductwork	26	0.0187
Not Suited for Ductwork	27	0.0170
Not Suited for Ductwork	28	0.0156

Furthermore, which is thicker 26 gauge or 30 gauge? In other words, a 24 gauge sheet of galvanized steel is actually thicker than a 26 gauge sheet of galvanized steel. That's because the same gauge number (say, 30 gauge) differs in thickness depending on whether it's aluminum, steel, galvanized steel, or zinc.

Subsequently, one may also ask, what is the thickness of ductwork?

The thinnest acceptable sheet metal for ductwork used in a single dwelling is 28 gage or 0.013 and 0.018 inches for galvanized and aluminum, respectively. This measurement is for around duct smaller than 12 inches in diameter and a rectangular section no bigger than 8 inches.

What thickness is 16 gauge?

15 U.S. Code § 206. Standard gauge for sheet and plate iron and steel

Number of gauge	Approximate thickness in fractions of an inch	Weight per square meter in pounds avoirdupois
13	3/32	40.36
14	5/64	33.64
15	9/128	30.27
16	1/16	26.91

37 Related Question Answers Found

How do I know what gauge my metal is?

How to Measure Sheet Metal Gauge Thickness

Use a tape measure to find the thickness of your sheet metal piece.
Multiply the number of millimeters by 0.03937 to convert to inches.
Compare the thickness of your sheet metal in inches to a sheet metal gauge chart to find the proper gauge of that particular piece.

How many types of ducts are there?

Within these three classifications of ductwork, there are two major types of ducts – flexible and sheet metal. Sheet metal ducts come in both rectangular and cylindrical shapes, and are generally more reliable and durable than flexible ducts.

What MM is 18 gauge?

Wire Gauge to Inches and Millimeters Conversion

Gauge	Inches	Millimeters
16	0.052	1.29
17	0.045	1.14
18	0.04	1.02
19	0.036	0.91

What is 20 gauge in mm thickness?

Metal Thickness conversion chart

Conventional Gauge	Inches	Metric
24	.020 -.026"	0.5 - 0.6 mm
22	.027 - .032"	0.7 - 0.8 mm
20	.033 - .037"	0.8 - 0.9 mm
19	.038 - .042"	0.9 - 1.1 mm

What is thicker 16 gauge or 18 gauge?

Gauge is the standard unit of measure for sheet steel and wire products. The lower the number, the thicker the steel. Therefore, 16 gauge is thicker than 18 gauge steel. The thinner steel will be louder and higher pitched, whereas the 16 gauge will be a lower pitch and substantially quieter when struck.

What is thicker 20 gauge or 25 gauge metal?

25 units - A 25 Gauge liner is 0.0223 inches thick. A 25 MIL liner is 0.0250 inches thick or approximately 12% thicker than a 20 Gauge liner. By comparison a dime is 0.0490 inches thick or just under twice the thickness of a 25 MIL liner.

What gauge is 2.5 mm steel?

Imperial Gauge	Imperial in mm	Metric Sheet mm
10	3.25	3.0
12	2.64	2.5
14	2.03	2.0
16	1.63	1.5

What gauge is .8mm steel?

Sheet Steel Gauge Conversion Chart

Gauge No	Inch	Metric
8	0.160"	4.1mm
9	0.144"	3.7mm
10	0.128"	3.2mm
11	0.116"	2.9mm

What does Smacna stand for?

SMACNA stands for Sheet Metal and Air Conditioning Contractors National Association. Suggest new definition.

What is considered medium pressure ductwork?

A. Medium and high-pressure ductwork is hereby defined as ductwork subject to operating pressures in excess of 2” w.g., positive or negative. Low pressure ductwork is hereby defined as ductwork subjected to velocities of 2500 fpm or less, and operating pressure of 2" w.g. or less, positive or negative.

What type of metal is used for ductwork?

Galvanized mild steel is the standard and most common material used in fabricating ductwork because the zinc coating of this metal prevents rusting and avoids cost of painting.

What gauge is spiral duct?

Spiral Pipe Diameter

Available in 3-inch to 36-inch diameter in five foot lengths. It is considerably stronger than longitudinal pipe of the equivalent gauge. All 22 gauge pipe measures 1/16″ less than the noted diameter on the inside (I.D.). Example 6″ diameter is 5-15/16″ I.D.

What size is 16 gauge steel?

Gauge size standard:

	Thickness
Gauge	in	mm
16	0.0598	1.519
17	0.0538	1.367
18	0.0478	1.214

What gauge is smoke pipe?

Standard Single. Single-wall stove pipe is used on standard wood stove installations. It should be at least 24-gauge sheet metal or thicker -- the lower the gauge, the thicker the metal. Typical code requires that single-wall stove pipe maintain at least an 18-inch clearance from any combustible material.

Is 655 a standard for ducting?

This standard covers materials and constructional requirements of air ducts used for air conditioning and ventilation system (including gas exhausting system). For the purpose of this standard, the following principal definitions shall apply.

What gauge metal roof is best?

With metal, the higher the gauge number, the thinner the material. So 29 gauge is thinner than 26 gauge. For residential roofing, 29 gauge is the minimum recommended, while 26 gauge is suitable for most applications. In areas with high winds, incidence of hail or severe weather, 24 gauge is advisable.

What gauge metal is thicker?

There are several different gauge systems used today, with specific gauge designations used for specific metal types. For example, in one gauge system, 18 gauge steel measures 0.0478 inches thick, but 18 gauge aluminum is 0.0403 inches thick.