SAE Flange

S AE flange is a hydraulic flange made in accordance with SAE J518 / ISO 6162 standards. SAE flanges are normally supplied for oil hydraulic systems in extensive range such as mining, shipbuilding, mobile hydraulic systems and oil & gas. The acronym ‘SAE' stands for the Society of Automotive Engineers, a group founded in 1905 to set standards for numerous sectors in the engineering area. The flange includes 4 bolt connection holes and is widely used around the world.

There are several bolt grades that are matched to install in equipment:

• Bolt grade 8.8: Yellow zinc as standard material with carbon steel flange.
• Bolt grade 10.9: FIZn 240h L is effective for high temperature applications and it is available on request.
• Bolt grade SS304: Standard material with a stainless steel flange.
• Bolt grade SS316: Provide greater corrosion resistance, available upon request.

Socket Weld SS316 SAE Flanges 6000#

SAE flanges are needed in hydraulic systems where precision , reliability , and leak-free connections are crucial. SAE Flanges are specifically designed to ensure seamless compatibility and secure connections between various hydraulic components. They find applications in a wide range of industries, including hydraulic machinery, industrial equipment, aerospace, and automotive. If you are working with hydraulic systems and require a dependable connection point for components, utilizing ISO 6162/ SAE J518 SAE Flanges is essential to ensure the efficient and reliable operation of your system.

Features:

Robust Construction

SAE Flanges are known for their robust construction. They are typically made from high-quality materials such as stainless steel or carbon steel, ensuring durability and longevity.

Precision Machining

These flanges undergo precision machining, resulting in tight tolerances and a perfect fit. This precision is critical to prevent leaks and ensure the efficiency of hydraulic systems.

Leak-Free Design

One of the standout features of these flanges is their leak-free design. The weld neck ensures a secure connection, eliminating the risk of hydraulic fluid leakage.

Versatility

SAE Flanges come in various sizes and pressure ratings, making them versatile for different hydraulic applications.

SAE Flanges are manufactured from two kinds of material, steel ST52.3 and stainless steel AISI SS316L . In order for SAE flanges to be able to be used for high pressure applications, the SAE flange bodies have to be made from normalized forgings.

Stainless Steel AISI SS316L , a low-carbon variation of stainless steel, is renowned for its corrosion resistance and versatility . These properties make it a popular choice for components like flanges in hydraulic systems. Meanwhile, Steel ST52.3 is known for its strength and durability , making it a robust material for hydraulic components. Its high tensile strength and impact resistance make it suitable for demanding applications.

AISI SS316L flanges find extensive use in hydraulic applications where exposure to corrosive environments is a concern. Their resistance to corrosion ensures longevity and reliability in challenging conditions. On the other hand, ST52.3 SAE flanges are preferred in hydraulic systems requiring components capable of withstanding high pressure and mechanical stress. Their durability ensures a longer service life in rigorous operating conditions.

Consider the pressure , temperature , and fluid compatibility requirements of the hydraulic system. Each material has distinct advantages as well as depending on the specific environmental conditions of the hydraulic system. Corrosive environments may favor SS316L, while high-stress conditions may lean towards ST52.3 steel.

SAE flange are available in nominal sizes ranged from 3/8"NB (DN10) to 5"NB (DN125). The pressure rating of SAE flange can be defined to two series: Code 61 Series and Code 62 Series .

Butt Weld SS316 SAE Flanges 3000# O-ring Side

The maximum working pressure for Code 61 series are ranges from 34 Bar to 345 Bar , depending on the sizes. For Code 62 series, the maximum working pressure are 414 Bar .

However, the pressure rating of SAE flanges and connected equipment combination might vary from each other. For example: if a pipe connected to the flange has a lower maximum working pressure, it will result in an overall lower working pressure of the system. Therefore in a system, the item with the lowest pressure will be the maximum working pressure of the system.

For the connections of SAE flanges, it is usually available in several types: threaded (NPT / BSPP), welding (Socket Weld / Butt Weld), blind flanges, and split flanges.

SAE flanges are available in two types: Flat Side and O-ring Side. Flat side of SAE flange are SAE flange that come with bolt thread (UNC / Metric) and O-ring side of SAE flange are SAE flange that contains a groove seat to place a rubber O-ring . Flanges with O-ring are has an advantage of prevent leakage as all metal-to-metal flanges are more prone to leakage.

The configurations of SAE flanges are flat side, O-ring side or complete set. A complete set of SAE flanges are a combination of flat side and O-ring side where it forms a seal between the flat surface and O-ring held in a recessed circular groove in the other half. By tightening the bolts, it draws the flat side and O-ring side together and compresses the O-ring.

SAE flange complete set is tightened by using socket head cap screws and spring washers according to the recommended torque value. According to the SAE J518 standard, the lengths of cap screws are usually shorter than the overall length of the SAE flange complete set.

SAE Flanges are built in two different code designs which are code 61 and code 62 . The following is a summary table:

ISO 6162 standardizes two main series of flanges used in hydraulic systems: the standard pressure series (Code 61) and the high-pressure series (Code 62) . These flanges have different designations and applications, primarily based on their pressure ratings and sealing methods.

Code 61 flanges are designed for lower to moderate pressure hydraulic systems. They are commonly used in applications where pressures range from 35 to 350 bar (500 to 5000 psi). These flanges are characterized by their oval-shaped port, bolt hole pattern, and a flat-faced sealing surface.

While on the Code 62 flanges are designed for high-pressure hydraulic systems, they are suitable for applications where pressures exceed 350 bar (5000 psi) and can go up to 420 bar (6000 psi) or even higher. These flanges feature a higher-pressure rating compared to Code 61 flanges.

Butt Weld SS316 SAE Flanges 3000# Flat Side

It is a static face seal that seals the flange with a high durometer O-ring . Metal-to-metal interactions on the flange's outer face will produce leakage. As a result, the O-ring sealing is compressed between the flat face and the O-ring face , resulting in a reliable soft sealing. Flanges utilize an O-ring to seal a connection and keep pressurized fluid in place. The following table is the materials used for seals of flanges:

SAE Flanges are used for high pressure hydraulic applications. In order to use and assemble SAE Flanges safely, it is important to know the right procedures and torque range for assembly.

Because of the high pressure, it is important to note that every hydraulic or pneumatic system requires some form of fitting installation for completion. Proper fabrication and installation are essential for leak free performance, the overall efficiency, and general appearance of any system. Do watch our YouTube video and our instructions below carefully!

Below are the instructions for assembly of SAE Flanges:

STEP 1

• Ensure the sealed surface is free from scratches and contamination.
• Lubricate the O-ring surface with system fluid or a compatible lubricant.

STEP 2

• Position the flange.
• Place the washer on the cap screws and bolt them through the bolt holes.

STEP 3

• Tighten the cap screws by hand.
• Torque the cap screws gradually in a diagonal sequence to the level in the torque table below.

STEP 4

• Tighten the cap screws according to the torque table below.

3000 PSI Series (Code 61) Flange Recommended Screw Torque Table

6000 PSI Series (Code 62) Flange Recommended Screw Torque Table