Duct Fitting Dimensions

Most standard duct sizes for rectangular ducts range from 35 40 inches to 3 7 inches depending on the airflow requirements per cubic foot.

Duct fitting dimensions.

Ft f at 75. Fittings shall be beaded unless duct will have an insulation covering or an acoustical liner. This requirement is applicable to 20 gauge or less in thickness and 3 w g. Frp pipe duct and fittings engineering guide and specifications sixth edition.

10 flanges drilled duct flanges 10 flat face flanges. Since 1921 ershigs inc. This insulation has thermal conductivity of 0 26 btu in hr. Diameter for round ducts ranges from 4 9 inches to around 41 inches.

For eccentric round to rectangular fitting use the custom fitting order sheet. In first case 2 x 2 the perimeter 8 ft and total sheet metal required is 8 x 100 800 sq ft. The dimensions shown on this page are essentially shown as center to end dimensions which apply to both belled end as well as plain end fittings. 4 the surface area and insulation requirements increase 25 percent.

Has been providing industry with quality metal products and dependable. All fittings are fabricated with stiffening beads on duct sizes 19 wide and larger which have more than 10 square feet of unbraced panel. Dual wall duct semco dual wall duct and fittings are made with 1 of fiberglass insulation sandwiched between the outer shell and a solid or perforated inner metal liner. As the aspect ratio increases from 1.

In second case 1 x 4 the perimeter 10 ft and total sheet metal required is 10 x 100 1000 sq ft. Ound duct greater than 2100mm diameter requires uangyih tech engineering review and approval. Most all fittings are fabricated with pittsburgh seams. Section 4 fittings dimensions.

To determine take out dimensions for belled end fittings refer to the bell depths to make appropriate calculations. Dual wall duct is also available in 2 3 and 4 thickness.