Comprehensive Guide for SAE Flanges

SAE flange: All you need to know
If you work in the hydraulics industry, you’ve probably heard the term “SAE flange.” But what exactly is it, and how does it work? This article examines SAE flanges, their applications, benefits, and how to choose the right one for your hydraulic system.

What is an SAE flange?

An SAE flange connects a hydraulic system’s hoses, pipes, or tubes. It is designed to provide a leak-free seal between the two mating surfaces and to withstand high pressure and vibration. SAE flanges are standardized by the Society of Automotive Engineers (SAE) and are widely used in the hydraulic industry.

SAE flange design

SAE flanges are designed to withstand high-pressure hydraulic systems and prevent leakage or damage. Depending on the application requirements, they are typically made of carbon steel, stainless steel, or aluminum. The flange head has four or more bolt holes that match the bolt holes on the component, ensuring a secure and tight fit. The clamp or bolt that secures the flange to the component is tightened to a specified torque using a torque wrench to prevent over-tightening or under-tightening.

How does an SAE flange work?

The SAE flange uses bolts or studs to create a metal-to-metal seal between two flat surfaces. The flange faces have a 90-degree groove (an “O-ring groove”) that holds the O-ring seal in place. The O-ring is compressed when the bolts are tightened, creating a seal that can withstand high pressure and vibration.

Types of SAE Flanges

SAE Flanges are typically classified by size, pressure rating, and connection type. Some of the more common types of SAE Flanges include

• SAE Code 61: This flange type has a flat face and is designed for low-pressure hydraulic systems.
• SAE code 62: This flange type has a raised face and is designed for high-pressure hydraulic systems.
• SAE code 45: This flange type has a 45-degree flare and is used for tube connections in hydraulic systems.
• Split flange: This type of flange is designed for use with hoses and is split in half to facilitate hose installation and removal.

Differences between Code 61 and 62 Flanges:
SAE flanges are manufactured in two code designs: Code 61 and Code 62. A summary table is shown below:

Description	Code 61	Code 62
Series	3000	6000
Size	3/8” to 5”	3/8” to 3”
Working Pressure (bar)	34 to 345	414

Different SAE flange connections

Socket weld SAE flange

The socket weld SAE flange is one of the most popular types of SAE flange used in hydraulic systems. It features a socket weld connection that makes it easy to weld the flange to a pipe or tube. The Socket Weld SAE Flange is designed for high-pressure applications and is suitable for systems requiring a leak-tight connection. It is available in various sizes and pressure ratings to meet system requirements.

Butt Weld SAE Flange

The Butt Weld SAE Flange is another popular type of SAE flange used in hydraulic systems. It features a butt weld connection that makes it easy to weld the flange to a pipe or tube. The Butt Weld SAE Flange is designed for high-pressure applications and is suitable for systems requiring a leak-tight connection. It is available in various sizes and pressure ratings to meet system requirements.

Threaded SAE Flange

The Threaded SAE Flange is a type of SAE flange with a threaded connection rather than a welded one. It is designed for use with pipes or tubes that have a threaded end, making it easy to connect and disconnect the flange. The threaded SAE flange is suitable for use in systems that require frequent maintenance or where components must be replaced frequently. It is available in various sizes and pressure ratings to meet system requirements.

Advantages of SAE Flange

SAE (Society of Automotive Engineers) flanges offer several advantages over other types of flanges, including:

• High-pressure capability: SAE flanges are designed to withstand high-pressure hydraulic systems, making them suitable for various applications.
• Easy assembly and disassembly: SAE flanges can be assembled quickly, making maintenance and repairs more accessible and efficient.
• Leak-free performance: The design of SAE flanges provides a secure, leak-free connection that ensures reliable performance in demanding hydraulic applications.
• Versatile design: SAE flanges are available in various shapes and sizes, making them versatile and adaptable to multiple hydraulic system requirements.
• Cost-effective: SAE flanges are generally less expensive than other hydraulic flanges, making them popular in many applications.

The benefits of SAE flanges make them an excellent choice for high-pressure hydraulic systems where reliability, efficiency, and cost-effectiveness are key considerations.

Materials used for SAE Flanges

SAE flanges are typically manufactured from high-strength, durability, and corrosion-resistant materials. The most common materials used for SAE flanges are:

• Carbon steel: Carbon steel is the most commonly used material for SAE flanges. It is popular due to its strength, durability, and affordability. Carbon steel flanges have high tensile strength, making them ideal for high-pressure hydraulic systems.
• Stainless Steel: Stainless steel is another popular material for SAE flanges. It is a corrosion-resistant material that offers excellent durability and strength. Stainless steel flanges are ideal for applications that require corrosion resistance, high temperatures, and high pressures.
• Brass: Brass is widely used for SAE flanges due to its excellent corrosion resistance and malleability. Brass flanges are easy to machine and have a low coefficient of friction, making them ideal for applications where the hydraulic system requires regular maintenance.
• Aluminum: Aluminum is a lightweight material with excellent corrosion resistance and strength. Aluminum SAE flanges are ideal for applications that require a lightweight yet durable hydraulic system.
• Titanium: Titanium is a high-strength material with excellent corrosion resistance, making it ideal for applications in harsh environments. Titanium SAE flanges are commonly used in the aerospace industry for their light weight and strength.
• Plastic: Plastic SAE flanges are becoming increasingly popular due to their lightweight and corrosion-resistant properties. They are ideal for applications that require resistance to chemicals and high temperatures.
• Inconel: Inconel is a high-strength, corrosion-resistant material often used for SAE flanges in high-temperature or high-pressure applications.

Titanium SAE Flange	ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7, ASTM R50250/GR.1| R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 |R56400/GR.5
Copper SAE Flange	T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel SAE Flange	ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Carbon Steel SAE Flange	ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel SAE Flange	ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel SAE Flange	ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Hastelloy SAE Flange	ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flanges
Brass SAE Flange	3602 / 2604 / H59 / H62 / etc.
Inconel SAE Flange	ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 Flanges
Monel SAE Flange	ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Duplex SAE Flange	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex SAE Flange	S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Alloy 20 SAE Flange	ASTM B462 / ASME SB462, Carpenter 20 Alloy, Alloy 20Cb-3
Aluminium SAE Flange	5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel SAE Flange	ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Nimonic SAE Flange	Nimonic 75, Nimonic 80A, Nimonic 90
Other DIN SAE Flange material	Tin bronze, Alumunum bronze, Lead bronze
Incoloy SAE Flange	ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flanges
254 Smo SAE Flange	ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547

The choice of material for SAE flanges depends on the specific application requirements, such as the pressure and temperature of the hydraulic system and the environment in which the system will be used.

SAE Flange Manufacturing Process: Quality and Efficiency in Production

At our company, we are dedicated to providing high-quality SAE flanges that meet industry standards. We understand that in today’s highly competitive market, quality and efficiency are paramount to maintaining a competitive edge. That is why we employ a comprehensive manufacturing process that ensures the highest level of quality and efficiency in our SAE flange production.
Design and Prototyping
Our manufacturing process begins with design and prototyping. We work closely with our clients to ensure that their specific needs and requirements are met. Our team of experts uses the latest technology and software to design and prototype SAE flanges that meet the highest industry standards.
Once the design is approved, we move on to prototyping. Our prototyping process involves creating a physical model of the SAE flange, which is then tested to ensure that it meets the desired specifications. We use advanced testing equipment to ensure that each prototype is of the highest quality and meets all industry standards.
Materials and Manufacturing
Once the prototype has been approved, we move on to the manufacturing process. We use only the highest quality materials in our SAE flange production, ensuring that each flange is durable and able to withstand the rigors of heavy-duty use. Our materials are sourced from trusted suppliers who meet our strict quality standards.
Our manufacturing process utilizes the latest technology and equipment to ensure that each SAE flange is produced with the highest level of accuracy and efficiency. We employ a range of advanced techniques, including CNC machining, to ensure that each flange is produced to the exact specifications required.
Quality Control and Testing
At our company, we understand the importance of quality control and testing. We have a rigorous quality control process in place that ensures that each SAE flange meets the highest industry standards. Our team of experts inspects each flange to ensure that it meets all required specifications, including size, shape, and material composition.
We also conduct thorough testing on each SAE flange to ensure that it can withstand the rigors of heavy-duty use. Our testing process involves subjecting each flange to a range of extreme conditions, including high pressure and temperature, to ensure that it can perform reliably under any circumstance.
Final Inspection and Packaging
Once our quality control and testing processes are complete, each SAE flange undergoes a final inspection to ensure that it meets our strict quality standards. Our team of experts inspects each flange to ensure that it is free from defects and meets all required specifications.
Finally, each SAE flange is carefully packaged to ensure that it is protected during transport and storage. We use only the highest quality packaging materials to ensure that each flange arrives at its destination in perfect condition.
At our company, we are dedicated to providing high-quality SAE flanges that meet the highest industry standards. Our comprehensive manufacturing process ensures that each flange is produced with the highest level of quality and efficiency, ensuring that our clients receive products that meet their specific needs and requirements.
If you want to learn more about our manufacturing process or place an order for SAE flanges, please visit our website. We look forward to working with you to meet your specific needs and requirements.

How do I choose the correct SAE flange?

When it comes to hydraulic systems, choosing the right SAE flange is critical. The right flange can ensure that your hydraulic system performs at its best, preventing potential leaks and malfunctions. However, choosing the right SAE flange for your specific needs can be overwhelming, so many take time and effort. This article will help you choose the right SAE flange for your hydraulic system.
Identify the type of SAE flange you need.
The first step in choosing the right SAE flange is identifying the type you need. Four kinds of SAE flange are available on the market: Code 61, Code 62, Split Flange, and Caterpillar Flange. Each type of flange has unique specifications and features, and it is important to choose the right one based on the requirements of your hydraulic system.
Code 61 and Code 62 flanges are designed for high-pressure applications and are commonly used in construction and mining equipment. Split flanges, however, are used in low-pressure applications and are easier to install and maintain. Caterpillar flanges are used on Caterpillar equipment and are compatible with the company’s proprietary hydraulic systems.
Consider flange size.
Flange size is another important factor to consider when choosing the right SAE flange for your hydraulic system. Flange sizes are measured in inches and range from 1/2″ to 5″. It is important to select the correct flange size that matches the diameter of your hydraulic hose to ensure a secure fit and prevent leaks.
Check the flange material.
SAE flanges are typically made of steel, stainless steel, or aluminum. The choice of material depends on the operating pressure and temperature of the hydraulic system. Steel flanges are commonly used in high-pressure applications and resist corrosion and wear. Stainless steel flanges are suitable for high corrosion resistance applications, while aluminum flanges are used in low-pressure applications.
Check the flange pressure rating.
The pressure rating of the flange is another important factor to consider when choosing the right SAE flange for your hydraulic system. The pressure rating of the flange determines the maximum pressure the flange can withstand without breaking or leaking. It is important to choose a flange with a pressure rating that matches or exceeds the maximum operating pressure of your hydraulic system.
Choose a reputable manufacturer.
Choosing a reputable manufacturer is important when purchasing SAE flanges. A reputable manufacturer will ensure their products are made from high-quality materials and meet industry standards. They will also provide technical support and after-sales service to ensure you get the most out of your SAE flange.
Choosing the right SAE flange for your hydraulic system is essential for optimum performance and to prevent potential leaks and malfunctions. By identifying the type of SAE flange you need, considering the flange size, checking the flange material and pressure rating, and choosing a reputable manufacturer, you can ensure that you select the right SAE flange for your specific needs.

Installing an SAE flange

To install an SAE flange, follow these steps:

• Clean the mating surfaces of the flange and hose or tube to remove any debris or contamination.
• Install the O-ring seal in the groove on the flange face.
• Align the flange and hose or tube, making sure they are centered.
• Insert the bolts or studs and hand-tighten them evenly.
• Tighten the bolts or studs to the recommended torque using a torque wrench in a crisscross pattern.
• Check the flange alignment and re-tighten the bolts or studs to the recommended torque.

Below are the instructions for assembly of SAE Flanges:

STEP 1

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

STEP 2

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

STEP 3

• Tighten the cap screws by hand.
• Torque the cap screws gradually in diagonal sequence till the appropriate torque level based on the below torque table.

STEP 4

From: chuankok.com

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

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

Metric Size	Flange Size	Screw Thread	Screw Torque (NM)
13	1/2″	M8	32
19	3/4″	M10	70
25	1″	M10	70
32	1 1/4″	M10	70
38	1 1/2″	M12	130
51	2″	M12	130
64	2 1/2″	M12	130
76	3″	M16	295
89	3 1/2″	M16	295
102	4″	M16	295
127	5″	M16	295

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

Metric Size	Flange Size	Screw Thread	Screw Torque (NM)
13	1/2″	M8	32
19	3/4″	M10	60
25	1″	M12	60
32	1 1/4″	M12	92
38	1 1/2″	M16	150
51	2″	M20	150
64	2 1/2″	M24	150
75	3″	M30	295

* Tolerance: max. 10%, min. 0%

SAE Flange Maintenance

SAE flanges require regular maintenance to ensure optimum performance and prevent leakage. The following maintenance procedures should be carried out:
Inspect the flange and O-ring seal for damage, wear, or deformation.
Replace the O-ring seal if it shows signs of wear or damage.
Tighten bolts or studs if they have been loosened by vibration.
Check for leaks and repair them immediately.

Common problems with the SAE flange

Like any hydraulic connection, SAE flanges can experience problems such as leaks, loosening, and damage. Here are some common issues with SAE flanges and how to deal with them:
Leakage
Leakage can occur for several reasons, including incorrect torque, damaged O-ring seal, or misalignment. To correct a leak, replace the O-ring seal, realign the flange, and tighten the bolts to the recommended torque.
Loosening
Loosening can be caused by vibration or improper installation. To correct loosening, tighten the bolts or studs to the recommended torque using a torque wrench.
Damage
Damage to the flange can be caused by impact, corrosion, or wear. To repair the damage, replace the damaged component with a new one.

SAE flange vs. other flange types

The SAE flange is only one of many hydraulic flanges available. However, the SAE flange has some advantages over other flange types, such as:

• Higher pressure rating than JIC flanges
• Higher vibration resistance than ORFS flanges
• More standardization than the DIN flange

Applications of SAE Flange

SAE Flange is used in various applications, such as:

• Construction machinery
• Agricultural machinery
• Industrial machinery
• Marine equipment
• Mining equipment
• Mobile equipment
• Pumps and valves

Where can I buy SAE Flanges?

Are you looking for SAE Flanges? First and foremost, it is important to understand what SAE flanges are and why they are essential for hydraulic systems. SAE stands for Society of Automotive Engineers, an organization that sets standards for hydraulic components. SAE flanges are designed to meet these standards and provide a safe and reliable connection between hydraulic components.
Now, let’s dive into where you can buy SAE flanges. One option is to purchase them from your local hydraulic supplier. These suppliers typically carry various hydraulic components, including SAE flanges. The advantage of buying from a local supplier is that you can inspect the flanges before purchasing them, ensuring they meet your specific requirements.
Another option is to buy SAE flanges online. Many online suppliers specialize in hydraulic components, most offering SAE flanges. The advantage of buying online is that you can easily compare prices and specifications from multiple suppliers, allowing you to find the best deal. However, buying from a reputable supplier is essential to ensure you receive high-quality and genuine SAE flanges.
When purchasing SAE flanges, it is also important to consider the material they are made from. SAE flanges are typically made from stainless steel or carbon steel materials. The material you choose will depend on the application and environment in which the flanges will be used. Stainless steel is ideal for applications that require corrosion resistance, while carbon steel is more suitable for high-pressure applications.
In addition to the material, you must consider the size and type of SAE flange you require. Many sizes and types of SAE flanges are available, each with its unique specifications. Choosing the correct size and style is essential to ensure the flanges fit securely and properly.
When buying SAE flanges, it is also essential to consider the supplier’s customer service and support. A good supplier can provide technical support and advice on which flanges to choose for your application. They should also offer a warranty or guarantee on their products, giving you peace of mind that you are buying high-quality and reliable SAE flanges.

Why do customers choose our SAE flanges?

We are a leading supplier of SAE flanges and related products. Whether you’re looking for a single flange or need to purchase in bulk, we can supply high-quality products at affordable prices.
Our SAE Flanges are manufactured to the highest standards of quality and durability. Manufactured from the highest quality materials, they are designed to withstand the most challenging conditions and last for years. Whether you’re looking for SAE Code 61 or SAE Code 62 flanges, we have the products in stock and ready to ship.
In addition to our wide range of SAE flanges, we also offer a range of other products designed to meet the needs of our customers. We have everything you need, from hydraulic cylinders to pumps and motors, to keep your equipment running smoothly and efficiently. And with our knowledgeable staff, we can help you find the right products for your specific needs.
When you buy from us, you can be sure you’re getting the best products at the best prices. We pride ourselves on our commitment to customer satisfaction and work hard to ensure our customers are always satisfied with their purchases. Whether you’re a large industrial company or a small business owner, we are committed to providing you with the highest service and support.
So if you’re looking for SAE flanges or other hydraulic components, look no further. With our wide selection, competitive pricing, and commitment to customer satisfaction, we are your one-stop shop for all your hydraulic needs.

Conclusion

SAE flanges are critical to hydraulic systems, providing leak-free, high-pressure connections. Understanding the types, benefits, and applications of SAE flanges will help you select the correct flange for your hydraulic system and ensure optimum performance.

Frequently Asked Questions

What is the maximum pressure rating for SAE Code 62 flanges?
The maximum pressure rating for SAE Code 62 flanges is 6,000 PSI.
Can the SAE flange be used with any hydraulic fluid?
No, the type of hydraulic fluid used should be compatible with the flange and O-ring seal material.
What is the difference between an SAE Code 61 flange and an SAE Code 62 flange?
The SAE Code 61 flange is a two-bolt flat face flange recommended for low-pressure applications, whereas the SAE Code 62 flange is a four-bolt O-ring seal flange recommended for high-pressure applications.
How do I size an SAE flange?
The size of an SAE flange is determined by measuring the outside diameter of the flange and the distance between the bolt holes.
Can SAE flanges be reused?
It is recommended that the O-ring seal is replaced each time an SAE flange is disassembled. However, the flange can be reused if not damaged or worn.