AWWA means American Water Works Association. AWWA C207 stands for Steel Pipe Flanges for Waterworks Service- Sizes 4in. Through 72in. AWWA C207 Flange is available across different markets in sizes NPS 4 through NPS 72, whereas the pressure class rating of AWWA C207 is as follows i.e. 86, 175-150, 275 and 300PSI.
This standard describes ring-type slip-on flanges and blind flanges. The flange pressure limits and the tables that describe them are: ring-type and and hub-type slip-on flanges;and blind flanges.
AWWA flanges are designed for generally lower pressure applications (300 psi or less). They are the exact opposite of API flanges.This flange specification is best for applications in which temperature is ambient and media is not corrosive. In most cases, this is simply for the transportation of well water and waste water. AWWA C207 steel flanges are usually of a mild carbon steel or stainless variant and are most often either of the ring slip on or blind disc style. Due to their intended design, they do not feature ring joint or raised faces, and typically seal with rubber gaskets. Due to their cost and weight compared to other flange types, they are also becoming more popular with project work for structural steel types which require mating or filling a gap between existing flanges.
FLANGE TYPE:
Steel-ring flanges class B(86 psi),Steel-ring flanges class D(175-150psi),Steel-hub flanges class D(175-150psi）,Steel-hub flanges class E(275psi),Steel-ring flanges class E (275psi),Steel-ring flanges class F(300psi),Blind-flange class B(86 psi）,Blind-flange class D(175-150psi）,Blind-flange class E(275psi),Blind-flange class F(300psi).
MATERIAL:
ASTM A105,ASTM A181 Class60,ASTM A181 Class70.
SURFACE TREATMENT:
Epoxy Coated,Coated With Anti-Rust Oil Coating,Transparent paint,Black Paint,Electrogalvanizing,Hot dip galvanizing,Powder coating.
CONNECTION TYPE:
Welding
PRODUCTION TECHNIQUE:
Free forging flange,Ring rolling forging flange.