ASTM A126 Class 125 Gray Iron Castings Reducing Companion Flat-Face Flange
Class 125 ASTM A126 Gray Iron Reducing Companion Flat-Face Flange
The Class 125 ASTM A126 Gray Iron Castings Reducing Companion Flat-Face Flange provides a practical solution for connecting different pipe or connection sizes within commercial and industrial piping systems. Combining a reducing configuration, durable gray iron construction, and flat-face sealing surface, this flange helps simplify transitions to compatible valves, pumps, fittings, and other Class 125 flanged equipment.
ASTM A126 Gray Iron Castings
ASTM A126 covers gray iron castings intended for use in valves, flanges, and pipe fittings. Gray cast iron offers good compressive strength, dimensional stability, machinability, and vibration-dampening characteristics for appropriate piping applications.
Class 125 ASTM A126 gray iron components are commonly used in water distribution, HVAC systems, mechanical piping, utilities, pump installations, manufacturing facilities, fire protection systems, and general industrial piping applications.
Reducing Companion Flange Design
A reducing companion flange allows a smaller pipe connection to mate with a larger compatible flanged connection, reducing the need for a separate reducer and standard companion flange in appropriate system designs. This can help conserve installation space and reduce the number of individual piping components required.
Depending on the specific flange design, the smaller pipe connection may incorporate internal pipe threads or another specified connection method. Connection type and dimensions should always be verified before ordering.
Class 125 Flat-Face Construction
The Class 125 designation represents a pressure class rather than a maximum working pressure of exactly 125 PSI. Allowable pressure depends on material grade, component design, size, temperature, and applicable standards.
The flat-face (FF) design provides a gasket seating surface extending across the flange face. This configuration helps distribute gasket and bolting loads over a broader area, an important consideration with gray cast iron components.
Selecting an ASTM A126 Reducing Companion Flange
When ordering a Class 125 ASTM A126 gray iron reducing companion flat-face flange, verify flange size, reduced pipe size, ASTM A126 grade, connection type, Class 125 rating, flat-face configuration, bolt pattern, dimensional standard, gasket, bolting requirements, and mating equipment compatibility.