Item # 9644, 26 Inch (in) Nominal Pipe Size Class 300 Flange On WATTCO

Unit of Measure

Specifications | Length of Bolts | Length Thru Hub | Dimensions for Flanges

Brands	N/A WATTCO™
Flange Material	N/A Forged Carbon Steel
Flange Face Type	N/A Raised
Thread Lengths¹	N/A American National Standards Institute (ANSI) for Pipe Threads American National Standards Institute (ANSI B2.1)
Standards	N/A American Society for Testing and Materials (ASTM A 105)
Flange Type	N/A Welding
Flange Class	N/A 300
Nominal Pipe Size	N/A 26 in
Outside Diameter of Flange O	N/A 38 1/4 in
Minimum Thickness of Flange Q	N/A 3 1/8 in
Diameter of Raised Face R	N/A 29 1/2 in
Diameter of Hub at Base X	N/A 28 3/8 in
Number of Bolt Holes	N/A 28
Diameter of Bolts	N/A 1 5/8 in
Diameter of Bolt Circle	N/A 34 1/2 in

Welding Neck Y	N/A 7 1/4 in
Slip-On Threaded Socket Y	N/A 7 1/4 in

Note for Dimensions

N/A

All dimensions are in inches and comply with ANSI B16.5 when applicable.
NPS 22: interpolated.
NPS 26 to NPS 42: same flange drilling dimensions as class 125 cast iron flanges.
Bolt holes: 1/8 inch larger than bolt diameter.
Dimensions match ANSI B36.10 inside diameter of a standard wall pipe.
Thickness of two nuts is included in length of alloy steel stud bolts.
Thickness of lap not included in length.
For lapped to lapped dimension, additional thickness of both laps are required.
For lapped to 1/16 inch raised face, additional thickness of one lap is required.
For lapped to any other facing, combining facing and one lap will result in the separation of the flanges.