API Std 650 - Shell Nozzle Welding Schedule (in)

Written by Jerry Ratzlaff. Posted in American Petroleum Institute

American Petroleum Institute (API)

standards

  • API Std 650 - Standard for Welded Tanks for Oil Storage
Thickness

of Shell and

Reinforcing

Plate \(t\) and  \(T\)

Size of Fillet

Weld A Nozzles

Larger than

NPS 2

3/16 1/4
1/4 1/4
5/16 1/4
3/8 1/4
7/16 1/4
1/2 1/4
9/16 1/4
5/8 5/16
11/16 5/16
3/4 3/8
13/16 7/16
7/8 7/16
15/16 1/2
1 1/2
1 1/16 9/16
1 1/8 9/16
1 3/16 9/16
1 1/4 5/8
1 5/16 5/8
1 3/8 11/16
1 7/16 11/16
1 1/2 3/4
1 9/16 13/16
1 5/8 13/16
1 11/16 7/8
1 3/4 7/8