ASME flange

We offer ASME flanges in a variety of sizes and specifications.

The dimensions of ASME flange standards range from 1/2 “-60” and the pressure is Class150-Class2500. They are commonly used in pressure vessels, boilers, pipelines, and fittings, especially in projects involving high temperature and high pressure.


ASME/ANSI B16.47 Flanges

Size from 26” – 60” class 75 to class 900


ASME/ANSI B16.5 Flanges

Size from 1/2” – 24” class 150 to class 2500


ASME Flange

ASME flange is a standard for flanges, developed by an international professional engineering organization, the American Society of Mechanical Engineers, abbreviated as ASMEI flange standard.

The dimensions of ASME flange standards range from 1/2 “-60” and the pressure is Class150-Class2500. They are commonly used in pressure vessels, boilers, pipelines, and fittings, especially in projects involving high temperature and high pressure.

The history and origin of ASME flanges

The American Society of Mechanical Engineers (ASME) is a professional organization of engineers established in 1880. The ASME B16 Committee was established in 1921 to develop standards related to pipeline flanges, fittings, and valve flanges. The ASME B16 Committee first issued the ASME B16.5 flange standard in 1973, which specifies the dimensions, pressure ratings, materials, and manufacturing requirements for pipeline flanges, flange fittings, and valve flanges. With the development of industry, the diameter of pipelines continues to increase. In 1982, the ASME B16 Committee issued the ASME B16.47 standard for large-diameter flanges. ASME B16.47 and ASME B16.5 constitute our main reference standards for American standard flanges.

ASME flange performance parameter table

Standard:ASME B16.5 (flanges between 1/2 inch and 24 inches in size)
ASME B16.47 (flanges between 26 inches and 60 inches)
Types:Weld Neck Flange, Blind Flange, Slip-On Flange, Socket Weld Flange and Threaded Flange.
Size:1/2″ – 60″
Pressure Rating:Class150, Class300, Class600, Class900, Class1500, Class2500.
Material:Common ANSI flanges are made of carbon steel (ASTM A105, ASTM A350 LF2), stainless steel (ASTM A182 F304, ASTM A182 F316), alloy steel (ASTM A182 F11, ASTM A182 F22, ASTM A182 F91) and other materials.
Sealing Face:Flat Face(FF), Raised Face(RF), Male and Female Face(MF), Tongue and Groove Face(TG), Ring Joint Face(RJ)
Connection:Bolt connection, Butt welding connection, Socket welding connection, Threaded connection.
Fabrication Process:Forged Flanges (Design->Raw Material Selection->Preheating->Forging->Processing->Welding->Heat Treatment->Surface Treatment->Testing and Inspection->Packaging and Delivery)
Casting Flanges: (Design->Mold Making->Raw Material Selection->Casting->Cleaning and Dressing->Machining->Testing and Inspection->Surface Treatment->Packaging and Delivery)
Application areas:In various equipment, pumps, valves, pipelines, and other engineering systems in the petroleum, natural gas, chemical, electric power, construction, ocean engineering, and other industries.
ASME flange performance parameter table

Why ASME standard flanges and why and ANSI standard flanges performance parameters are the same? What is the difference between the two?

ANSI (American National Standards Institute) is ASME (American Society of Mechanical Engineers), an accredited organization, ANSI is mainly responsible for the management of engineering and technology-related standards, which happens to include flange standards. So they are from a certain sense is the same standard, in fact, ASME standard flange and ANSI standard flange parameters are the same, there is no difference, so this site will also be ASME/ANSI flange a piece of collation show.

So the material, selection, installation and routine maintenance of ASME flanges are undoubtedly the same as ANSI flanges, which will not be told here, please go to the ANSI flange page.

ASME flanges are flanges manufactured in accordance with the standards established by the American Society of Mechanical Engineers (ASME).

The dimensions of ASME standard flanges are determined according to the diameter of the pipeline and the pressure level, which are specified in detail in the ASME standard.

Commonly stainless steel, carbon steel and alloy steel, YANHAO company is a professional China flange manufacturer, which can be customized for you according to your project requirements.

The marking of ASME standard flanges should contain information such as NPS size marking, manufacturer’s name, material grade designation, pressure rating, and so on.

ASME standard flanges are mainly used in various pipelines. The ASME standard allows flanges from different manufacturers to be interchangeable, which makes installation and use more convenient.

Flat Face, Raised Face, Tongue and Groove and so on.

ASME B16.5, ASME B16.47, ASME B16.36, ASME B16.1, ASME B16.42, ASME B16.48, ASME B16.20 and so on.

You can choose the supplier with good credit and complete qualification, it is better to let the supplier provide samples and relevant product certificates first, and at the same time, you should ask for perfect after-sale service, here we recommend a Chinese flange manufacturer-YANHAO, we have many years of experience in producing flanges with complete qualification, and the flanges we produce are reliable in quality and affordable, and have been cooperating with many companies in the world for many projects, so you can buy them without any worries.