• The 5086 aluminum alloy flange is a part that connects the pipe to the pipe. It is used for the connection between the pipe ends. There are also some flanges that will be used on the inlet and outlet of the equipment for the connection between the two pieces of equipment. 5086 aluminum alloy belongs to the aluminum-magnesium alloy family because its alloy composition can increase its corrosion performance, also known as anti-rust aluminum. The main alloy component of this aluminum alloy is magnesium. Although magnesium has a large solid solubility, the structure of the compound formed with aluminum is not much different from the matrix, and the strengthening effect is not obvious, so it is usually not strengthened by heat treatment but hardened by strain hardening or cold machining of the material. Because heat treatment does not affect the hardness, 5086 aluminum retains mechanical strength, is easy to weld, has good welding performance, and has seawater corrosion resistance.

ASME B16.5 5086 aluminum pipe flanges will form an oxide film in humid air to prevent metal from being corroded, so this aluminum flange will have good corrosion resistance and is widely used. ANSI B16.5 specifies specific details such as dimensions, pressure-temperature ratings, tolerances, tests, etc. for 5086 aluminum flanges. The standard is limited to cast or forged 5086 aluminum pipe flanges and blind flanges cast, forged, or fabricated from plates.

Specification of ASME B16.5 Aluminum 5086 Pipe Flange

TS is a supplier of ANSI/ASME B16.5 aluminum alloy 5086 pipe flanges. Our 5086 pipe flanges are normally offered in casting, forging, and plate and are available in a number of sizes and kinds ranging from NPS 1 /2 to NPS 24, from Class 150 to Class 2500, to satisfy the needs of our customers.

ANSI/ASME B16.5 5086 Aluminum Weld Neck Flange

ANSI/ASME B16.5 5086 Aluminum Weld Neck Raised Face Flange

ANSI/ASME B16.5 5086 Aluminum Straight Hub Welding Flange

ANSI/ASME B16.5 5086 Aluminum Straight Hub Welding Raised Face Flange

ANSI/ASME B16.5 5086 Aluminum Slip-On Raised Face Flange

ANSI/ASME B16.5 5086 Aluminum Slip-On Flange

ANSI/ASME B16.5 5086 Aluminum Socket Weld Flange

ANSI/ASME B16.5 5086 Aluminum Socket Weld Raised Face Flange

ANSI/ASME B16.5 5086 Aluminum Blind Flange

ANSI/ASME B16.5 5086 Aluminum Blind Raised Face Flange

ANSI/ASME B16.5 5086 Aluminum Lap Joint Flange

ANSI/ASME B16.5 5086 Aluminum Lap Joint Raised Face Flange

ANSI/ASME B16.5 5086 Aluminum Threaded Flange

ANSI/ASME B16.5 5086 Aluminum Threaded Raised Face Flange

Chemical Composition (%) of ASME B16.5 Aluminum 5086 Pipe Flange

Mechanical Properties of ASME B16.5 Aluminum 5086 Pipe Flange

There are three manufacturing processes for ASME B16.5 5086 aluminum flanges: casting, forging, and plate. Casting is a widely used flange process with high production efficiency and low production cost that can produce flanges with complex shapes. The casting flange is to melt the metal into liquid steel at a high temperature, pour the molten steel into a metal mold that is preheated and kept at a constant temperature, and form the shape of the flange. After a period of time, the casting is naturally cooled and formed in the mold, then quickly cooled by water and mold, and finally polished and rust-proofed. The flange manufactured by casting has the accurate shape and size of the blank, and the processing amount is small, but there will be casting defects such as pores, cracks, etc., and the internal structure is poorly streamlined. It is generally suitable for medium and low-pressure work. In addition, the surface finish of the cast flange is not high, the edge chamfer is irregular, and there are burrs that are not smooth. Its negative tolerance is generally in the range of 1–5 mm.

The forging of the flange is also a very important production process. The process is to cut the cylindrical billet according to a certain size, heat it to a certain temperature to make it thermoplastic, and put it on the cold heading to let the forging machine continue to beat it. This will make the inside of the steel billet more compact, and its mechanical properties are better than the original steel billet. Finally, the bolt holes of the flange are punched out on the billet by a punching machine, and the formed blank flange is also cut and polished to become a usable flange.

The carbon content of the forged flange is generally lower than that of the cast flange; the streamlined shape is good; the structure is compact and uniform; there are no defects such as pores; the mechanical properties are better; the shear force and tensile force are higher; and the cost is higher than that of the cast flanges. Flanges with high strength, high wear resistance, and high corrosion resistance that are suitable for medium and high-pressure environments can be manufactured after forging because the grain structure of the metal material has been improved during the forging process. At the same time, it can eliminate defects and porosity and increase the density and strength of the flange. In addition, the flange forging process can guarantee the dimensional accuracy and surface quality of the flange because the deformation amount and deformation speed of the metal material can be precisely controlled during the forging process.

The steel plate flange is cut directly from the flange disc on the center plate, leaving the inner and outer diameters and thickness of the processing amount on it, and then the bolt holes and waterline are processed. This type of flange is only suitable for low-pressure operating environments. The width of the middle plate limits the maximum diameter of Plate flanges.

ASME B16.5 Aluminum Alloy 5086 Cast Flange

ASME B16.5 Aluminum Alloy 5086 Forged Flange

ASME B16.5 Aluminum Alloy 5086 Plate Flange

Thickness Tolerance of ASME B16.5 Aluminum 5086 Pipe Flange

The ASME B16.5 standard has requirements for the raised face thickness of 5086 aluminum raised face flanges. Flanges of Class 150 and 300 usually have a 2mm [0.06 in.] thick raised face, while the raised face thickness of flanges in Class 400, 600, 900, 1500, and 2500 is generally 7mm [0.25 in.]. This thickness is not included in the minimum thickness of the flange.

Features of ASME B16.5 Aluminum 5086 Pipe Flange

• Non-toxic

• Good corrosion resistance

Low-temperature resistance

Good strength

Beautiful, bright color

No magnetism

Light in mass

The flange made of aluminum alloy can reach the hardness of a stainless steel flange, and its conductivity is higher than that of a stainless steel flange. It has low density, is lightweight, convenient for transportation, has good strength, does not react with chemical substances such as nitric acid and hydrogen peroxide, and has other advantages. Under low-temperature conditions, the strength of the aluminum flange is improved without brittleness, so it is an ideal material for low-temperature equipment. Nowadays, in industrial applications, 5086 aluminum flanges have good relative advantages and application prospects.