AWWA flanges come in a huge amount of variety. In this article, we look at some of this variety which is on offer, delving into the unique attributes of each. At the end, you will have a very good perspective on the different kinds of pipe flanges that are prevalent in the market as well as the exceptional value that comes with every one of them.
AWWA C207 Class D-Rings and Blinds
C207 Class D-Rings and Blinds AWWA flanges between 4 and 12 inches are meant for pressure ratings of up to 175 psi while those 14 inches and above are meant for pressure ratings of up to 150 psi. These rings and blinds range from 2 to 144 inches in nominal size with an outside diameter anywhere between 6 and 167.25 inches. The number of bolt holes on them can range from 4 to 84.
AWWA C207 Class E-Rings and Blinds
AWWA C207 Class E-Rings and Blinds are meant for pressure ratings of up to 275 psi. These rings and blinds range from 4 to 144 inches in nominal size with an outside diameter anywhere between 9 and 167.25 inches. The number of bolt holes on them can range from 8 to 84.
AWWA C207 Class F-Rings and Blinds
AWWA C207 Class F-Rings and Blinds are meant for pressure ratings of up to 300 psi. These rings and blinds range from 4 to 48 inches in nominal size with an outside diameter anywhere between 10 and 65 inches. The number of bolt holes on them can range from 8 to 40.
AWWA C207 Class B-Rings and Blinds
C207 Class B-Rings and Blinds AWWA flanges are meant for pressure ratings of up to 86 psi. These rings and blinds range from 4 to 144 inches in nominal size with an outside diameter anywhere between 9 and 167.25 inches. The number of bolt holes on them can range from 8 to 84.
AWWA C207 Steel Hub Flanges
AWWA C207 Steel Hub Flanges can include Table 3 Class D flanges meant for pressure ratings between 150 – 175 psi, as well as Table 4 Class E flanges, meant for pressure ratings of up to 275 psi. These steel hub flanges range from 4 to 96 inches in nominal size with an outside diameter anywhere between 9 and 113.25 inches. The number of bolt holes on them can range from 8 to 68.
AWWA C228 SF Stainless Steel Ring Flanges
C228 SF Stainless Steel Ring AWWA flanges are meant for pressure ratings of up to 300 psi. These stainless steel ring flanges can range from 4 to 48 inches in nominal size with an outside diameter anywhere between 10 and 65 inches. The number of bolt holes on them can range from 8 to 40.
AWWA C228 SA/SB/SD/SE Stainless Steel Ring Flanges
When we talk about C228 SA/SB/SD/SE Stainless Steel Ring AWWA flanges, each class or sub-class has its set of pressure ratings that, in this case, are 50, 86, 150 and 275 psi respectively for SA/SB/SD/SE stainless steel ring flanges. These stainless steel ring flanges can range from 2 to 72 inches in nominal size with an outside diameter anywhere between 6 and 86.5 inches. The number of bolt holes on them can range from 4 to 60.
AWWA C228 Stainless Steel Blind Flanges
Like the previous set of C228 SA/SB/SD/SE Stainless Steel Ring AWWA flanges that we discussed above, AWWA C228 Stainless Steel Blind Flanges also come in the same set of sub-classes that have their own set of pressure ratings which in this case are also 50, 86, 150 and 275 psi respectively for SA/SB/SD/SE stainless steel blind flanges. These stainless steel blind flanges range from 2 to 66 inches in nominal size.
Pipe flanges 