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Pipe Spools

Pipe Spool Dimensions
NPS 20 ASME B16.5/B16.9

OTHER DIMENSIONS
1/2
3/4
1
2
3
4
6
8
10
12
14
16
18
20
24

Flange Class 150

145.0   762.0  
spool NPS 20 150
910.0


Flange Class 300

162.0   762.0  
spool NPS 20 300
927.0


Flange Class 600

196.0   762.0  
spool NPS 20 600
961.0

RELATED ARTICLE

What are Welding Procedures?

Flange Class 900

254.0   762.0  
spool NPS 20 900
1019.0


Flange Class 1500

362.0   762.0  
spool NPS 20 1500
1127.0


Flange Class 2500

...   ...  
spool NPS 20 2500
...


Wn flanges and Elbow LR 90 deg.

Notes..
  • Each image shows two Weld Neck flanges and a 90⁃degree Long Radius Elbow.

  • Dimensions are in millimeters unless otherwise indicated.

  • The standard gap (opening) between the ends of butt welds is typically 1.5 mm to 3.0 mm, depending on the wall thickness of the material and the welding procedure specification (WPS).

  • The dimensions calculated on this page are based on a 3 mm gap.

  • Dimensions are given in millimeters and are rounded up or down; for example, 168.3 mm is rounded to 168.0, 88.9 to 89.0, and so on.

  • Detailed dimensions can be found under “Flange and Fitting Dimensions.”

  • TYP stands for “Typical” and indicates that a dimension applies to all identical, recurring locations in the drawing.


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