Spiral Duct - Spiral Ducts and Fittings - Hi-sea

Spiral Duct

Spiral Duct


Spiral Duct


1. Application
The air duct is mainly used to connect the air circulation between two places and play the role of ventilation. The most widely used in the market is the spiral duct.
2. Type Identification Method
Duct Rd × L
For example: the duct with the 500mm diameter and the 6m lengths is identified as R500 × 6.
Pre-heat insulation duct: PRd × L
NOTE: (1). Normal: L=(max)400/each
(2). Insulation materials: mineral wool, rubber and plastic or glass fiber
(3). Thickness of insulation: δ=12.5mm δ=15mm or 25mm, unless otherwise stated, then δ=12.5mm.
3. Dimension Table

φd

Tolerance

t

100

100.0-100.5

0.5

125

125.0-125.5

0.5

160

160.0-160.6

0.5

200

200.0-200.7

0.5

250

250.0-250.8

0.5

315

315.0-315.9

0.5

400

400.0-401.0

0.6

500

500.0-501.1

0.75

630

630.0-631.2

0.75

800

800.0-801.6

0.75

1000

1000.0-1002.0

0.75

1250

1250.0-1252.5

1.00

NOTE: (1). Galvanized and stainless steel sheet materials can be selected for duct S304、S316.
(2). Material thickness is according to GB 50243-2002 or determined by customers.

4.Allowed maximum pressure under the standard atmosphere pressurepa

L

m

Φd

mm

t=0.5

mm

t=0.6

mm

t=0.7

mm

t=0.9

mm

Standard

Strengthen

Standard

Strengthen

Standard

Strengthen

Standard

Strengthen

6

100

21000


36300




42000


125

15000


25900


38000


35000


160

8300


18000


31000


27000


200

5000


14500


23000


20000


250

2300

5000

7000

16000

17500

21000

15300

23000

315



2000

10500

10000

14000

10200

21000

400




4500

6000

9000


12100

500




3000


5500


7200

630






3900


6000

3

800






1500


2600

1000








1000

1250








800

Note: Pressure drop chart are only for reference in this catalogue.

5. Drawing

Spiral Duct


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Our mail: manager@hiseamarine.com

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