All flanges are manufactured in accordance with industry-accepted standards.
Flange - ASME B16.36, Orifice Flange (1/2"-24")
Flange - Industry Standard Flange (also called Large Diameter Flange) (26"-larger)
Industry Standard Flanges have no national standard code or are they covered by any governing body.
AWWA C207
AWWA C207
ASTM STANDARDS
AWWA STANDARDS
ASME B16.5 and ASME B16.47 cover pipe flanges up to NPS 60 (B16.5 from 1/2" to 24" and B16.47 from 26" to 60"). ANSI B16.47 covers two series of flanges, Series A is equal to MSS SP-44-44, and Series B is equal to API 605 (API 605 has been canclled).
The B16.5 standard was first published by ANSI in 1973. Prior to that it was an ASA standard. In 1996 the standard changed to ASME B16.5. For 10 years prior to the change, the standard included both and was listed as ANSI/ASME B16.5.
So what's the difference? The answer is there is no difference. The ASA, ANSI and ASME have continually refined and broadened the B16.5 standard. I'm sure there is a committee working on future enhancements right now.
The current and correct standard is ASME B16.5. ANSI B16.5 is common industry lingo and is still referred to extensively by architects, engineers, manufacturers and suppliers. And although the ANSI B16.5 standard does not technically exist, it its understood as another way to say ASME B16.5.
The B16.5 Standard defines the following:
Requirements are valid for normal case, in special case you have to contact the technical department.
Below you will find a short description and definition of each type, completed with an detailed image.
Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.