Ring Gaskets – AWWA C207 & C228 Class B, D & E

The table below provides the gasket dimensions for American Water Works Association flanges of type C207 (steel flanges) and C228 (stainless steel flanges).

NPS = Nominal Pipe Size
ID = Inner Diameter
OD = Outer Diameter

General Note:
All dimensions are in inches.
Larger sizes as well as customized sizes can be furnished.
Bolt diameter should be 1/8″ less than the bolt hole size.

¹ For Reference Only:
Sizes NPS 66, 72, 84 and 96 are equal to Taylor-Forge Class 125

Standards:
ASME B16.5 – Pipe flanges and flanged fittings: NPS 4 through 24
ASME B16.47 – Large diameter steel flanges: NPS 26 through NPS 60 standard

No liability or guarantee for the correctness and completeness of the information provided

NPS = Nominal Pipe Size
ID = Inner Diameter
OD = Outer Diameter

General Note:
All dimensions are in inches.
Larger sizes as well as customized sizes can be furnished.
Bolt diameter should be 1/8″ less than the bolt hole size.

¹ For Reference Only:
Sizes NPS 66, 72, 84 and 96 are equal to Taylor-Forge Class 125

Standards:
ASME B16.5 – Pipe flanges and flanged fittings: NPS 4 through 24
ASME B16.47 – Large diameter steel flanges: NPS 26 through NPS 60 standard

No liability or guarantee for the correctness and completeness of the information provided

Custom Configurations of Any Type Available