Thickness  of Steel sheet follow duct’s dimension

( Follow smacna standard 3rd Edition-2005, Fig 2-1 and TCVV 232:1999 )

Thickness

0.48

0.58

0.75

0.95

1.15,

V <15m/s

≤  450

451-750

751-1500

1501-2200

> 2200

V >15m/s

751-1200

1201-2200

> 2200

Type of connection

Application

Pressure (Pa)

Max Dimension (mm)

Driver slip

≤1000

≤ 600

TDC

≤ 2000

+ ≤ 1600 (low pressure)

+ ≤ 1250 (medium pressure)

+  ≤1000 (high pressure)

Angle flange + TDF

≤ 2500

+ >1500 (low pressure)

+ >1000 (medium pressure)

+ >500 (high pressure)