What is a SAE flange?

Size Range of SAE flange:

As the professional hydraulic SAE flange manufacturers, Wilson Pipeline can manufacture and supply full size range of SAE 3000 flanges and SAE 6000 flanges.

• For class 3000 psi standard pressure series: nominal sizes DN 13 (1/2″) – DN 127 (5″)
• For class 6000 psi standard pressure series: nominal sizes DN 13 (1/2″) – DN 76(3″)

Types of SAE flanges

• SAE Single-Part Flanges / SAE Single-Part Counterflanges
• SAE Blind Flanges  (SAE closed flanges)
• SAE Blocks
• SAE Flange couplings

What are SAE Split Flanges?

Split SAE flanges are one of the common products of SAE flanges. Wilson Pipeline manufactures and supplies best China sae split flanges in a wide range of sizes in carbon steels and stainless steels.

Standard of SAE Split Flanges:

• Usually two halves (a pair) of SAE split flange halves make up A split flange. There are two main series of SAE split flange halves, which are standard pressure series (3000psi), this series is also known as code 61 SAE split flange, it is also called light duty split sae flange in some areas, It is designed and manufactured according to ISO 6162-1;

• The other series is high pressure series (6000psi) split flanges designed according to ISO 6162-2, this type is also known as code 62 SAE split flange, and it is called heavy duty split sae flange halves in some areas.

• Our product of SAE split flanges also conform to SAE J 518 C.

Materials of SAE split flange:

As one of the main manufacturer and supplier of SAE flanges in China, our factory can produce and supplier sae split flange in full range of materials.

• Carbon steel: C20, C45, CQ235 and so on.
• Stainless steels: 304, 316, 316L, 316Ti, and corresponding EN/DIN steel grade 1.4031, 1.4401, 1.4404, 1.4571.
• Other materials such as duplex steels on requests

Surface treatment of SAE Split Flanges:

Carbon steel SAE split flanges usually are supplied with surface treatment as below:

• Zinc coated (white): Salt Spray Test > 72 Hours ( for higher requirement, we can also do with 200 Hours salt spray test on requests )
• Galvanized zinc (yellow)
• Phosphated (black)
• Nickle plated
• Untreated oiled
• Untreated oxidation

Main series & Size range of SAE split flange

• Code 61 split flanges (3000 psi standard pressure series) : 1/2″ (DN13) to 5″ (DN127)

Data sheet of code 61 SAE split flange:

• Code 62 split flanges (6000 psi High pressure series) : 1/2″(DN13)  to 3″(DN76)

Data sheet of code 62 SAE split flange:

Our factory also manufactures flat SAE split flange halves.

Working pressure of SAE Split Flanges:

The working pressure of standard pressure series split SAE flange halves is between 35 bar to 350 bar, depends on the sizes and the blots used. And for 6000 psi high pressure series SAE split flange halves, the working pressure can be up to more than 400 bar.

Advantages of SAE split flange:

The advantage of this type of SAE flange is that the installment on existing piping and hydraulic tubing is easy. SAE split flanges are designed to allow easy installation of the pipes and tubes in tight quarters applications and provide tilt proof clamping.

What are SAE flange clamps?

Hydraulic SAE flange clamps are designed and manufactured according to standard ISO 6162-1, ISO 6162-2. This product is widely used in hydraulic systems as safe and leak free tube and pipe connectors.

Main series of SAE flange clamps:

• 3000 PSI Standard Pressure Series (acc. to ISO 6162-1)
• 6000 PSI High Pressure Series (acc. to ISO 6162-2)

Size range of SAE Flange clamps:

• for 3000 PSI Standard Pressure Series: 1/2″ (DN13) to 5″ (DN127)
• for 6000 PSI Standard Pressure Series: 1/2″ (DN13) to 2″ (DN51)

Materials of SAE Flange clamps:

Wilson Pipeline SAE flange clamps are made in carbon steel and popular stainless steels:

• Carbon steels: C45, C20, CQ235, or on requests;
• Stainless steels: 304, 316, 316L, 316Ti or on requests. Stainless steel SAE flanges are used as stainless steel hydraulic tubing connectors.

Surface treatment of SAE Flange clamps:

For carbon steel Sae flange clamps there usually should be surface treated as below

• Zinc coated (white): Salt Spray Test > 72 Hours ( for higher requirement, we can also do with 200 Hours salt spray test on requests )
• Galvanized zinc to yellow
• Phosphated (black)
• Untreated oiled
• Untreated oxidation

Manufacturing process of SAE Flange clamps:

SAE Flange clamps are usually forged and machined.

There are some different styles of SAE Flange clamps as below:

• SAE Flange clamp with thread

• Flat Style SAE Flange Clamps

What are SAE NPT threaded flanges?

SAE NPT threaded flanges are the SAE threaded flanges with NPT type thread. As a sub variety, this product followed all the descriptions of SAE threaded flanges, including materials, working pressure, surface treatment and size range, and so on.

Except the difference of thread type, the other specifications and technical parameters of SAE NPT thread flanges are the same with BSPP thread flanges.

What are SAE BSPP threaded flanges?

SAE BSPP threaded flanges are the SAE threaded flanges with BSPP type thread. As a sub variety, this product followed all the descriptions of SAE threaded flanges. To find information of materials, working pressure, surface treatments and size range, please refer to SAE threaded flanges.

Available Sizes and data sheet of SAE BSPP thread flanges:

Data Sheet of SAE BSPP thread flanges

The above data sheet could also be used for SAE NPT threaded flanges. The dimensions of these two types of SAE flanges are the same.

What are SAE socket weld flanges?

SAE Socket Weld Flanges are one of the main types of SAE wled flanges, which are designed and manufactured according to standard ISO 6162-1/ ISO 6162-2. Products are conform to standard SAE J518 as well.

Main styles of SAE Socket Weld Flanges:

• SAE socket weld flanges
• Flat style SAE socket weld flanges
• SAE 90° flanges / SAE socket weld elbow flanges

Standard of SAE Socket Weld Flanges:

• ISO 6162-1: for 3000 psi standard pressure series (light duty), known as code 61 flanges as well
• ISO 6162-2: for 6000 psi high pressure series (heavy duty), known as code 62 flanges as well

Materials of Socket welding flanges:

• Carbon steel: S355J0, C45, C20 or equivalent, other steel grades on request
• Stainless steel: AISI 304 (EN/DIN 1.4301), AISI 316 (EN/DIN 1.4401), AISI 316L (EN/DIN 1.4404), AISI316Ti(EN/DIN 1.4571), and duplex stainless steel grades, other steel grades on request. Stainless steel SAE Flanges are needed when connecting stainless steel hydraulic tubing.

Surface conditions of SAE Socket Weld Flanges:

Carbon steel Socket weld flanges can be supplied with below surface conditions:

• Zinc coated (white): thickness of Zinc plate is more than 8 µm, thicker zinc plate is available on requests.
• Yellow Galvanized zinc
• Phosphated (black)
• Nickle plated
• Blank + oiled
• Untreated oxidation

Working pressure of SAE Socket Weld Flanges:

• The working pressure of standard pressure series SAE socket welding flanges is between 35 bar to 350 bar, depends on the sizes and the blots used.
• For 6000 psi high pressure series socket weld flanges, the working temperature can be up to more than 400 bar.

Size Range of SAE Socket Weld Flanges:

Wilson Pipeline produce and supply a wide range of sizes of SAE socket weld flanges as in below table.

Data sheet of SAE Socket Weld Flanges

What are SAE socket weld elbow flanges?

SAE Socket Weld Elbow Flanges are one of the popular type of SAE socket wled flanges. The elbow is usually 90°. So they are know as SAE 90° Flanges as well.

Materials of SAE Socket Weld Elbow Flanges:

• Carbon steel SAE 90° Flanges: C45, C20, CQ235, or on requests.
• Stainless steel SAE 90° Flanges: 304, 316, 316L, 316Ti or equivalent EN/DIN stainless steel grades 1.4301, 1.4401, 1.4404, 1.4571, used for connecting stainless steel hydraulic tubing.

Main series & Size Range of SAE Socket Weld Elbow Flanges:

SAE 90° Flanges come in two varieties, and here below is the size range of each variety:

• for 3000 PSI Standard Pressure Series: 1/2″ (DN13) to 3″
• for 6000 PSI High Pressure Series: 1/2″ (DN13) to 2″ (DN51)

3000 PSI series also is known as code 61 SAE flanges, while 6000 psi high pressure series is known as code 62 SAE flanges.

Surface of SAE Socket Weld Elbow Flanges:

Carbon steel socket weld elbow flanges are usually supplied in surface condition as below:

• Zinc coated (white)
• Galvanized zinc (yellow)
• Phosphated (black)
• Nickle plated
• Blank + oiled
• Untreated oxidation
• Blank

Working Pressure of SAE Socket Weld Elbow Flanges:

• 3000 psi standard series: 35 bar to 350 bar
• 6000 psi high pressure series: up to 420 bar.

The working pressure is also determined by the sizes of the SAE socket weld elbow flange, and the grade (10.9 or 8.8) of the bolts used.

What are SAE closed flanges?

SAE closed flanges are known as SAE blind flanges, there is no hole in the middle of the flange. SAE closed flanges are used to close and seal the pipe end.

Main series of SAE Closed Flanges:

• 3000 psi standard pressure series according to ISO 6162-1
• 6000 psi high pressure series according to ISO 6162-2

Both the above series of SAE closed flanges are conformed to SAE J518C.

Materials of SAE Closed Flanges:

• Carbon steel: S355J0 / C45 or equivalent, other steel grades on request.
• Stainless steel: 304, 316, 316L, 316Ti; EN/DIN steel grades 1.4301, 1.4401, 1.4404, 1.4571.

Size Range of SAE Closed Flanges:

• 3000 psi standard pressure series (code 61): 1/2″ to 5″
• 6000 psi high pressure series (code 62): 1/2″ to 3″

Working Pressure of SAE Closed Flanges:

For 3000 psi standard pressure series, the working pressure is 35- 350 bar, while for 6000 psi high pressure series, the working pressure could be up to 400 bar. The actual max. working pressure of SAE flanges depends on the strength of the bolts used, and also depends on the wall thickness and quality of the tubes used, we recommend our customers use Wilson Pipeline’s hydraulic tubing for high pressure applications, because of its advantages of accuracy dimensions, suitable hardness and high pressure resistance.

What are SAE butt weld flanges?

SAE Butt Weld Flange ( or SAE Butt Weld On Flange) is one of the main types of SAE weld flanges, which is widely used in hydraulic systems in various industries.

Wilson Pipeline’s pipe clamp factory is one of the first class quality China manufacture of SAE Flanges which including SAE weld flanges.

Main series of SAE Butt Weld Flanges:

SAE butt weld flanges are pided into two series according to designed standard and working pressure as below, which are used for different pressure rating hydraulic tubing connectors.

• 3000 PSI standard pressure series according to ISO 6162-1, also known as code 61 flanges
• 6000 PSI high pressure series according to ISO 6162-2, also known as code 62 butt weld flanges

Both of the above series are conform to standard SAE J518C also.

Materials and Surface conditions of SAE Butt Weld Flanges:

Please refer to the product introduction of SAE weld flanges for the materials and surface conditions of SAE butt weld flanges, because it is the sub-category. For stainless steel hydraulic tubing connecting, usually we use stainless steel SAE flanges.

Sizes of SAE Butt weld flanges

Data sheet of SAE butt weld flanges

Temperature Range, pressure rating and working pressure of SAE hydraulic flange

There are mainly two different pressure ratings for the SAE hydraulic flanges as below.

Working Pressure:
The standard pressure ranges from 34 to 345 bar for code 61 (3000 series) and 200 to 414 bar for code 62 (6000 series). Please take note that the pressure information of the flange and connected equipment combinations may vary from each other. For example: if a pipe connected to the flange has a lower working pressure, it will result in an overall lower working pressure of the system. Therefore, please consider the lowest pressure as the maximum working pressure of this combination.

Pressure rating:

• Standard pressure series SAE class 3000 flanges: pressure rating 3000 psi with working pressure between 35 bar to 350 bar.
• High pressure series SAE class 6000 flanges: pressure rating 6000 psi with working pressure maximum 400 bar.

Temperature Range:
The standard working pressure of carbon steel SAE flanges is between -40°C and +120°C. For stainless steel, the standard working pressure is between -60°C and +50°C. Working Pressure for SAE Flanges made from stainless steel and used at elevated temperatures have to be:

• Reduced by 4%: +50°C to < +100°C
• Reduced by 11%: +100°C to < +200°C
• Reduced by 20%: +200°C to < +250°C

Standards of SAE flanges

• 3000 psi standard pressure series, designed according to standard ISO 6162-1, this is also called code 61 flanges
• 6000 psi high pressure series, designed according to standard ISO 6162-2, this is also called code 62 flanges.

Materials of SAE hydraulic flanges

SAE flanges are usually available in Carbon steel, 304 stainless steel and 316 stainless steel, other materials also can be supplied on request.

• Carbon steel SAE flanges
• Stainless steel SAE flanges: 304, 316,  316L, 316Ti, or equivalent EN/DIN stainless steel grade 1.4301, 1.4401, 1.4404, 1.4571; other grades of stainless steel SAE flanges are available on customers’ request.

Advantages of SAE Flanges:

SAE Flanges / hydraulic SAE Flanges have below advantages:

• High pressure resistance: 6000 psi SAE Flanges/code 62 flanges can be used under working pressure upto 400 bar(6000psi).

• Precision dimensions

• Low cost

Applications of SAE code 61 / code 62 flanges:

As one of the most safety and leak free connect solutions for pipes and tubes, SAE flanges are widely used in pipe and tube systems for pumps and oil-dynamic applications in many industries such as mining, shipbuilding, paper processing, machinery manufacturing, building machinery and so on. Especially suitable for using in hydraulic systems, so they are well known as hydraulic flanges.

Industrial Hydraulics

• Injection Moulding Machinery
• Aluminium Die-Casting Machinery
• Sintering Machinery
• Steel Mills
• Shipyard
• Hydraulic Presses
• Paper Processing

Mobile Hydraulics

• Building Machinery

• Agricultural Machinery

• Forestry Machinery

• Lifting and Material Handling Equipment

How does the SAE flange work?

The whole set includes flat side flange and o-ring side flange. The o-ring side flange contains a groove seat for the rubber o-ring (usually made of NBR material). The entire device forms a seal between the plane and the o-ring, and the o-ring is fixed in the concave circular groove of the other half. Tighten the bolt to pull the two halves together and compress the O-ring.
Due to the use of o-rings, flanges with o-rings have an advantage over metal-to-metal flanges because all metal flanges are more prone to leakage because they must be tightened to a higher but narrower torque range. This makes it easier for metal-to-metal flanges to peel off the threads or crack.
According to the recommended torque, tighten the complete flange with socket head screws and spring washers. The screw length is usually shorter than the total length of the SAE flange, but according to the SAE J518 standard, this is normal. In addition, according to SAE J518, there is no requirement for a hex nut for a fixed flange.

Source: China SAE Flanges Manufacturer – Wilson Pipeline Pipe Industry www.wilsonpipeline.com

(Wilson Pipeline Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Wilson Pipeline products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

If you want to have more information about the article or you want to share your opinion with us, contact us at sales@wilsonpipeline.com
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