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Single Wall Round - 1995 SMACNA Standards

Standard Gauge Chart

-2" W.G.

Diameter Spiral Pipe Long Seam Pipe Fittings
3" - 13" 28 26 26
14" - 17" 26 24 24
18" - 20" 24 22 22
21" - 23" 24 20 20
24" - 26" 22 20 20
27" - 30" 22 18 18
31" - 34" 20 18 18
35" - 48" 20 18 18
49" - 60" 18 16 16
61" - 72" 16 14 14

+2" W.G.

Diameter Spiral Pipe Long Seam Pipe Fittings
3" - 14" 28 26 26
15" - 26" 26 24 24
27" - 36" 24 22 22
37" - 50" 22 20 20
51" - 60" 20 18 18
61" - 84" 18 16 16

+10" W.G.

Diameter Spiral Pipe Long Seam Pipe Fittings
3" - 10" 28 26 26
11" - 14" 26 24 24
15" - 26" 24 22 22
27" - 36" 22 20 20
37" - 50" 20 20 20
51" - 60" 18 18 18
61" - 84" 18 16 16

Available Materials

  • Galvanized G60 and G90
  • Phosphatized (Paint Grip)
  • 304L Stainless Steel
  • 316L Stainless Steel
  • Polyvinyl Coated (PCD)
  • Aluminum

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.