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ANSI B16.5 steel flange

ANSI B16.5 steel flange is a steel flange by the standard developed by the American National Standards Institute. The sizes range from 1/2”– 24” in ASME B16.5. There are many different flange standards to be found worldwide. In the USA, the standard is ASME B16.5 (ANSI stopped publishing B16.5 in 1996). ASME B16.5 covers flanges up to 24 inches in size and up to a pressure rating of Class 2500.
Product name: ANSI B16.5 flange,  ANSI flange dimensions, ANSI flange ratings,ASME flange, pipe flange, steel flange
Standard: ASME B16.5, ASME B16.47, ASTM B16.48, AWWA C207 etc. 
Specification: 1/2 "to 24"
Pressure: 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB;
Product Details

ANSI B16.5 steel flange Type

Slip on, Welding neck, Blind, Threaded, Socket weld, Lap joint.

ANSI B16.5 steel flange material

Carbon steel flange (CS) : ASTM A105,20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70;

Stainless steel flange (SS) : ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;

Alloy flange (AS) : ASTM A182F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, ST45.8;

ANSI B16.5 steel flange

ANSI B16.5 steel flange features

ANSI B16.5 steel flange production process: sawing, heat treatment,  forging,  and machining;

1: ANSI B16.5 steel flange with neck is connected to the pipe end. Mainly connect pipes to pipes.

2: there are holes on the American standard flat welding flange with neck, which can be threaded with bolts and gasket, so that the two flanges are closely connected.

3: ANSI B16.5 steel flange connection refers to a pair of flanges, a gasket and a number of bolts and nuts.

4: the gasket is placed between the two flange sealing surface, tighten the nut, the specific pressure on the surface of the gasket reaches a certain value after deformation, and fill the uneven sealing surface, so that the connection is tight without leakage. Flange connection is a detachable connection. According to the connected parts can be divided into container flange and pipe flange. Flat welding flange with neck is suitable for steel pipe connection with nominal pressure not exceeding 2.5mpa.

5: ANSI B16.5 steel flange for flange and pipe welding, it has reasonable structure, strength and the stiffness is large, withstand high temperature and high pressure and repeated bending and temperature fluctuations, reliable sealing. Flat welding flange with neck with nominal pressure of 0.25 ~ 2.5MPa adopts concave and convex sealing face.

ANSI B16.5 steel flange are parts that connect pipes to pipes and are attached to pipe ends. American standard butt welding flanges are forged and cast in two ways.

ANSI B16.5 steel flange can be divided into butt welding flanges with neck and without neck.

ANSI B16.5 steel flange consist of two flanges with flange pads bolted together to complete the connection. American standard flanges have holes and bolts to hold the two flanges together.


1: It is recommended to purchase from a regular flat-welded flange manufacturer with neck,  hav ing a certain production scale;

2: Flange manufacturers need to provide the material inspection report and other related materials of the flat welding flange with neck;

3: ANSI B16.5 steel flange shall have corresponding specifications and models steel stamp and identification;

ANSI B16.5 steel flange

ANSI B16.5 steel flange

Flanges are essential components used in piping systems to connect pipes, valves, pumps and other equipment. They provide a vital link between various parts of the system, ensuring that fluids or gases flow seamlessly without any leakage. If you're looking for a reliable and durable flange option, then look no further than ANSI B16.5 steel flanges and AWWA flanges! These two types of flanges have been engineered to meet exacting standards and are widely regarded as some of the best options available on the market today.

ANSI B16.5 steel flange dimensions

When it comes to ANSI B16.5 steel flanges, one of the most crucial things you need to understand is their dimensions. These flanges are available in a wide range of sizes, ranging from 1/2 inch all the way up to 24 inches in diameter. The standard thickness for these flanges ranges from 7mm up to 38 mm depending on the size.

Moreover, ANSI B16.5 steel flange dimensions can vary based on different pressure ratings such as Class 150, Class 300, and Class 600 - with each class having its unique dimensions for the same pipe size.

It's worth noting that when selecting an ANSI B16.5 steel flange dimension for your project, you must consider parameters like temperature, fluid type and pressure rating so that you choose the right fit for your application.

In addition to this information about dimensions; it’s also critical to know other factors affecting these types of materials' performance over time!

AWWA flange dimensions

The American Water Works Association (AWWA) has established standard dimensions for flanges used in water service. AWWA flanges may be made of various materials, including ductile iron, PVC and steel. The AWWA standard covers a range of flange sizes from 3 inches to 72 inches in diameter.

One unique feature of the AWWA flange is its bolt hole pattern. Unlike other types of flanges which use a circular bolt pattern, AWWA flanges utilize an oval-shaped bolt hole pattern. This helps provide greater stability and strength when connecting pipes together.

AWWA also specifies different facing types for their flanges depending on the pressure rating required for the application. For lower pressure applications, flat face or raised face are commonly used facing types while ring type joint (RTJ) facings are specified for higher pressure ratings.

Understanding the specific requirements outlined by AWWA for their flange dimensions can help ensure safe and efficient water service operations.

ASME pipe flanges

ASME pipe flanges are another important type of steel flange used in piping systems. These flanges are designed to fit ASME standard pipes and come in various sizes, materials, and pressure ratings.

The ASME B16.5 standard covers the dimensions and tolerance requirements for these types of flanges. They have raised faces or flat faces with a groove for a gasket seal.

ASME pipe flanges also come in various types such as slip-on, weld neck, blind, threaded, lap joint, socket weld, etc., each serving different purposes depending on the application.

ANSI B16.5 steel flanges and AWWA flanges are crucial components that play an essential role in connecting pipes together securely while allowing ease of maintenance. It is crucial to choose the appropriate type of steel flange according to your specific piping system needs based on factors such as size, material construction grade required for temperature conditions expected during operation or installation criteria set forth by regulatory standards bodies like ASTM International (formerly known as American Society for Testing Materials).

Tags: asme b16.5, asme flange, ansi flange dimensions, awwa flange dimensions, asme pipe flanges

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