Exploring API 605 Standards: A Guide to Emirerri Steel's ANSI B 16.47 Series B Products

ANSI B16.47 Series B, also known as API 605, is a set of standards established by the American National Standards Institute (ANSI) and the American Petroleum Institute (API). These standards define the design, dimensions, materials, pressure ratings, and sizes for large-diameter steel flanges. API 605 flanges are commonly used in the oil and gas industry, chemical processing, and other applications requiring robust and reliable connections in high-pressure and high-temperature environments.


Carbon Steel (A105)
Stainless Steel (A182 F304, F316)
Alloy Steel (A182 F5, F9, F11, F22)
Duplex Stainless Steel (A182 F51)
Nickel Alloys (B564 N06625, N08825)
Other Alloys
Dimensions: ANSI B 16.47 Series B API 605

Pressure Rating :

Class 150
Class 300
Class 400
Class 600
Class 900
Class 1500

NPS 26 (Nominal Pipe Size 26 inches)
NPS 30
NPS 36
NPS 42
NPS 48
NPS 54
NPS 60 or larger