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Single Wall Round - Negative Pressure 2" - 4"

Standard Gauge Chart

Negative 2" w.g.

Diameter Spiral
Pipe Gauge
Stiffener/
Spacing
Spiral
Profile
Fittings / Long
Seam Pipe Gauge
Stiffener/
Spacing
3" - 11" 26 NR Flat 24 NR
12" - 13" 26 NR Flat 24 NR
14" - 15" 26 NR Flat 24 NR
16" - 17" 26 NR Flat 24 NR
18" - 28" 26 A/20 Flat 24 A/20
30" - 34" 26 A/20 Corrugated 22 A/20
36" - 40" 24 A/20 Corrugated 22 A/20
42" - 46" 24 A/20 Corrugated 22 A/20
48" - 52" 22 B/20 Corrugated 20 B/20
54" - 58" 22 B/20 Corrugated 20 B/20
60" - 64" 22 B/20 Corrugated 20 B/20
66" - 76" 20 C/20 Corrugated 18 C/20
78" - 82" 20 D/20 Corrugated 18 D/20
84" - 88" 20 E/20 Corrugated 18 E/20
90" - 92" 20 E/20 Corrugated 18 E/20

Negative 4" w.g.

Diameter Spiral
Pipe Gauge
Stiffener/
Spacing
Spiral
Profile
Fittings / Long
Seam Pipe Gauge
Stiffener/
Spacing
3" - 11" 26 NR Flat 24 NR
12" - 13" 26 NR Flat 24 NR
14" - 15" 24 NR Flat 22 NR
16" - 17" 24 NR Flat 22 NR
18" - 28" 24 A/20 Flat 22 A/20
30" - 34" 22 A/20 Corrugated 20 A/20
36" - 40" 22 B/20 Corrugated 20 B/20
42" - 46" 22 B/20 Corrugated 18 B/20
48" - 52" 20 B/20 Corrugated 18 B/20
54" - 58" 20 C/20 Corrugated 18 C/20
60" - 64" 20 D/20 Corrugated 18 D/20
66" - 76" 18 E/20 Corrugated 16 E/20
78" - 82" 18 E/20 Corrugated 16 E/20
84" - 88" 18 F/20 Corrugated 16 F/20
90" - 92" 18 E/12 Corrugated 16 E/12

Standard fittings to be spot welded and sealed. Continuously welded seam fittings are available if specified. All PCD and SPOT Agion fittings are riveted and sealed.

Stiffener Sizing

NR = Not Required A = 1x1x1/8 B = 1-1/4x1-1/4x3/16 C = 1-1/2x1-1/2x3/16
D = 1-1/2x1-1/2x1/4 E = 2x2x3/16 F = 2x2x1/4 G = 3x3x1/4

Available Materials

  • Galvanized G60 and G90
  • Phosphatized (Paint Grip)
  • 304L Stainless Steel
  • 316L Stainless Steel
  • Polyvinyl Coated (PCD)
  • 3003 Aluminum
  • SPOT Agion (Anti-Microbial)
  • Black Iron

Connectors

  • Standard Slip-fit / Couplings
  • SPOT Flange
  • Angle Rings
  • Spiralmate
  • Wonder Flange
  • Long Seam Weld Flange

Special materials may be available. Please contact your nearest representative for specific details.


Available Spiral Profiles


Spiral Pipe of Texas' products are manufactured in accordance with the latest SMACNA, ASHRAE and SPIDA standards. In an on-going effort to improve our products, Spiral Pipe of Texas reserves the right to revise the design and/or specifications of its products as technology advances or applicable standards change.

As we reflect on the last 30 years, we are proud of the customers we have associated with, the projects we have completed, and the positive impact we have had on our industry. To our valued customers - Your support and confidence in our team brought SPOT to this important milestone.

Thank You

For trusting us with your business. We remain committed to providing you with quality, value, and service in the years ahead.