Flanges, like all pipe fittings, have two sets of specifications, one that defines the dimensions and one that defines the material.

To order flanges, you will need both specifications, along with the flange type, the pipe size and schedule (or pipe OD & ID), the pressure class, the flange facing, and the material grade. Don't worry, if you don't have all this, we can help you figure it out.

Part 2 (Part 1 here)

Here is a list of the most common Pipe Flange Material Specifications

Most material specifications have several grades, and some have dozens.  Click on the specification for the available grades.

Each material specification governs:

• Chemical composition
• Mechanical properties (yield, tensile, elongation)
• Heat treatment and forging/casting process
• Impact toughness and temperature limits
• Testing and inspection standards

Together, these specifications ensure that pipe flanges are fit-for-service across industries like oil & gas, petrochemical, power generation, marine, HVAC, food, and pharmaceuticals.

Here are the most common flange types, pressure classes, and facings

Now all you need is the pipe size and schedule.

So you see, it's not that hard.  Even this guy could figure it out.

If you need help specifying or ordering pipe flanges, give us a call.  We can help!