High-Pressure Steel Unthreaded Pipe Flange
Butt-Weld, 300 Class, 2-1/2 Pipe Size





Pressure Rating | High Pressure |
Fabrication | Forged |
Shape | Straight |
Fitting Type | Flange |
Fitting Connection | Butt Weld |
Pipe Size | |
(A) | 2 1/2 |
(B) | 2 1/2 |
Dash Size | |
(A) | 40 |
(B) | 40 |
Flanged Connection Surface (B) | Raised |
Flange OD | 7 1/2" |
For Bolt Diameter | 3/4" |
Bolt Hole | |
Diameter | 7/8" |
Number Of | 8 |
Bolt Circle Diameter | 5 7/8" |
Pressure Class | 300 |
Material | Steel |
Maximum Pressure @ Temperature | 600 psi @ 72° F |
Maximum Steam Pressure @ Temperature | 300 psi @ 300° F |
Certificate Form | Paper |
Certificate Type | Material Certificate with Traceable Lot Number and Test Report |
Connects To | Pipe |
Construction (A) | Seamless |
Flange Construction | One Piece |
For Fitting Material | Steel |
For Fitting Schedule | 80 |
For Pipe Material | Steel |
For Pipe Schedule | 80 |
For Fitting Pressure Class | 3000 |
For Use With | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water |
Specifications Met | ASME B16.5, ASTM A105 |
System of Measurement | Inch |
Threading | Unthreaded |
Wall Thickness | 0.276" |
Country of Origin | United States |
DFARS Compliance | Specialty Metals COTS-Exempt |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | Not Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 730791.2000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | Yes |
Forged for extra strength, these heavy duty flanges can withstand high-pressure applications. Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a gasket (sold separately) to create an access point in a pipe line.
Forged—Forged flanges have better strength than cast flanges.
Butt-Weld Fitting Connection—Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld.
The information in this 3-D model is provided for reference only.

























