ASME/ANSI B16.5 Flanges

ANSI Standard Flanges

Yanhao provides several ANSI Standard Flanges, which generally be used for the removable connection of pipes as well as the transitions between devices (valves, pumps). Our products cover ANSI flanges (welding neck / blind flanges/slip-on / threaded flanges/socket welding flanges) according to B16.5. ANSI flanges are available in pressure ratings 150/300/600/900/1500/2500 lbs. Our flanges include stainless steel, alloy steel, and carbon steel. The dimensions range from ½ “to 24”. We are also happy to supply special materials, special approvals, and flanges according to drawings on request. Contact us.

What Is ANSI Flange?

What is ANSI? ANSI is the acronym for the American National Standard Institute, which is the certification body responsible for standardizing various products, services, and systems in the United States. It is a private, not-for-profit organization (headquarters in Washington) that oversees the development of standards for products, services, processes, systems, and employees of the United States. Its objective is to improve the standard of living and the competitiveness of American businesses through standardization.

What is the ANSI Flange standard? ANSI Flange standard is the official standard for ANSI Class Pipe Flanges and Flanged Fittings in which the dimensions, surface properties, shape of the sealing surface, marking and the material as well as the technical delivery conditions for flanges are specified.

ANSI Flanges, manufactured based on standards developed by organizations, is the standard flanges designed with specific rules and conditions stated by ANSI standards. The ANSI Flange dimensions are determined by the size of the pipe and the class of the pressure, which are required for the flange to be able to withstand water pressure and heat.

ANSI flange Specifications Indicate: The flange pressure class (in LB), size of the pipe (in inches), the number of bolts, the diameter of the flanges (in inches), the diameter of the bolts, the diameter of the hole, the bolts are placed into and the measurement of the bolts circle (in inches)

ANSI Flanges Standard & Specifications

ANSI Standard Types: ANSI B16.5

ANSI Standard Flange Dimensions & Size: Class 150, 300, 400, 600, 900, 1500, and 2500 LB – NPS 1/2”to NPS 24”

ANSI Pipe Flange Types: Slip-On Flange, Weld Neck Flange, Blind Flange, Lap Joint Flange, Threaded Flange, Socket-Weld Flange

ANSI Flange Materials:

Carbon Steel: ASTM A105, ASTM A350 LF1/2, ASTM A181

Alloy Steel: ASTM A182F1 /F2 /F5 /F7 /F9 /F11 /F12 /F22

Stainless Steel: ASTM A182F6 /F304 /F304L /F316 /F316L/ F321/F347/F348

ANSI Flange Face Types: Flat Face (FF), Raised Face (RF), Ring Joint (RTJ), Tongue and groove (T&G), And Male and Female type

ANSI Flanges Application Industries

ANSI standard flanges are widely used in many industries around the world, including:

Chemical, Oil & Glass assemblies

Mining industry (Fire protection services)

Power industry (plants and nuclear power)

Construction (Waterworks and municipal pipe systems)

Water Treatment (Heating systems and heat exchangers)

Food processing and manufacturing (Plumbing and mechanical systems)

And other valves, vessels, and industrial pumps