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Posted on December 30, 2019

Code 61/Code 62 Caterpillar® Flange & Komatsu Flange Fittings

Code 61/Code 62 Caterpillar® Flange (SAE J518) 

In referring to the various types of flanges used in the world markets, it is important to make the comparison to the Caterpillar Code 61 and 62 flange (SAE J518).  As with other flanges, the female port hole on the Caterpillar flange is unthreaded with 4 bolt holes surrounding it at the corners. The male has a flanged head with an O-ring grove and with holes to match the port.

Posted on December 18, 2019

International Flanges: GAZ Poclain 24° Flange

GAZ Poclain 24° Flange

Like Caterpillar in the U.S. and Komatsu in Japan, there is a French standard flange fitting known as the Poclain 24 flange. The Poclain flange derives its name from the Poclain excavator company, founded by Georges Bataille in France in 1927 and was a leader on the world market because of its revolutionary hydraulic motor.  

Posted on December 05, 2019

International Flanges: JIS 4-Bolt

JIS 4-Bolt Flanges are frequently used in fluid power systems. There are two pressure ratings: Type I Code 61 and Type II Code 62. 

As with DIN flanges, the unthreaded female port in a JIS flange has 4 bolt holes at the corners.  The male flanged head has holes to match the port and a grooved recess for an O-ring.

The O-ring makes the seal between the flanged head and the flat surface on the port.  Threaded bolts are inserted through the 4 bolt holes to securely connect the flange to another mating flange or the flat surface of the port

Posted on November 26, 2019

International Flanges: DIN 4-Bolt

One type of international flange is the DIN 4-Bolt Flange. DIN means, "German Institute for Standardization." These flanges are similar to SAE Code 61 and SAE Code 62 flanges. 

For this particular flange, the unthreaded female port has 4 bolt holes around it in the corners.  The male flanged head has holes to match the port and a grooved recess for an O-ring.

The O-ring makes the seal between the flanged head and the flat surface on the port.  Threaded bolts are inserted through the 4 bolt holes to securely connect the flange to another mating flange or the flat surface of the port

Posted on April 15, 2019

Flange Plugs: What are they?

Flange Plugs

 Among the category of flange fittings (or flange adapters) are flanges plugs, which are used to cap off or block the flow in the pipe. Flange plugs are basically a flange without a center hole which closes the end of a pipe when bolted to a standard mating flange. Depending on the system requirements, these plugs are typically gas or liquid tight. For gray water subsurface irrigation they are sometimes used to force waste through perforated holes in the pipe, driven by system pressure.

Posted on April 11, 2019

Deciding Which Flange to Use

Hydraulic connections mate pipes, hoses or tubes together or to components such as cylinders, pumps, valves or ports in other equipment. They are used to complete a leak free hydraulic fluid system. These components combine to ensure the system is free of leaks or other failure under high pressures. Because of certain connection configurations and applications, flange fittings or separate flanges are the best or sometimes the only practical solution to make an efficient and leak free connection. 
 
Posted on April 11, 2019

When to Use Flange Fittings and Why to Use Them

Flange Fittings & How They Fit In

The fluid power industry is making a shift to connections with an elastomeric O-ring seal, to minimize leakage. These fittings include the SAE straight thread, face seal, ISO 6149, SAE  J518 (Code 61 and Code 62) flange fittings and flanges (Code 61 and Code 62), where the O-ring seal is compatible with the fluid.

Posted on April 01, 2019

Mistakes You Don't Want to Make With Flange Fittings

 Not Interchangeable

 It is important to note that the two flange fitting style codes (61 and 62) are not interchangeable due to their pressure ranges and their different bolt patterns. As shown in this diagram of overlapping code 61 and code 62 4-bolt flange fittings, the dimensional placement of holes are close, but not identical. Note the difference in the bolt-hole’s center-to-center dimensions.

Posted on March 20, 2019

Five Reasons to be Using Flange Fittings

Benefits of Flanges

 Though there are specific applications where flanges and/or flange fittings are the only practical choice (particularly in larger, high pressure piping applications), flanges sometimes provide benefits to the piping system that traditional hydraulic fittings do not. For instance, in those larger OD applications flanges are often able to be connected to pipe (tube or hose) and component ports more easily than threaded fittings or adapters. Most importantly, in many severe service applications on mobile construction equipment flanged connections are best for: