Hydraulic Hose End Fittings and Popular Manufacturers
If you're purchasing hydraulic hoses, the chances are that you're going to need their associated hydraulic hose end fittings or couplings as well. That's because different hoses come in different lengths, diameters, pressure ratings and need to be compatible with the fluid they carry. Fittings help you adapt hoses to your hydrostatic system, allowing you to extend a hose range and attach them to different hydraulic pumping and actuation components.
Materials used for Fittings
Hydraulic hose end fittings are manufactured using a variety of materials. The one you choose depends on your application and the desired performance.
Metal:
You'll find that metals are the most common material chosen for manufacturing fittings owing to their durability, strength, and heat resistance. Steel is the most widely used metal as it satisfies the requirements mentioned above, suitable for high-pressure applications. If you're looking for more resistance, then you might want to consider stainless steel variants for fittings. Brass and aluminum are also used to combat chemical resistance but don't have the strength that steel brings. However, you can use them for low to medium-pressure applications. They have the advantage of being inexpensive, allowing you to minimize the cost of hydraulic assemblies.
Plastic:
Plastics will provide the best corrosion resistance; however, they are not as strong or durable as metal fittings. They are the least expensive out of all the fittings but can only be used for low-pressure applications.
Types of Fittings
Like hoses, fittings also come in different sizes and are made of different materials. Most commonly used fittings include those made from plastics, stainless steel, and brass. The one you choose depends on your application, the durability you desire, the operating temperature, and the strength of the sealing you require. The two most common types of hydraulic hose end fittings are permanent and reusable.
Permanent Hydraulic Hose Fittings
As its name implies, this type of fitting permanently attaches to a hydraulic hose. They consist of two parts: the stem and the ferrule. The stem is inserted into the inner tubing of a hydraulic hose while the ferrule encloses the outer cover. The assembly is then placed in a crimping tool that applies even pressure on the outer ferrule, deforming it and sandwiching the hydraulic hose end between the two components.
The fitting can come in two different variants. It can be a two-part component with the stem and ferrule separate from each other, or it can be a single component where the ferrule is a permanent part of the stem. Additionally, you'll have to consider if your hose requires skiving or not. That's when part of the outer cover is shaved off so that serrations inside the ferrule can bite into the metal wire mesh or spiral for a tighter seal.
Reusable Hydraulic Hose Fittings
Reusable or field attachable fittings become a part of hose assemblies without the need for a crimping tool. They are most commonly used in cases when access to a crimping tool is not available, the hose assembly does not require such a strong seal to withstand pressures, or the hose is customized to cater to a specific application. Instead of a ferrule, they have a collar placed on the hose end. The stem gets threaded into the collar and tightened to create a seal. The stem and collar can be unscrewed to retrieve the fitting for future use.
Factors to Consider When Selecting Hydraulic Hose Fittings
Seal type:
There are many standards like the NPT/NPTF, BSPT, SAE, ISO, DIN, Metric, among others, that define how the fittings get attached to hydraulic components. For example, the NPT/NPTF standard, the most commonly used in North America, outlines that the threads need to be tapered for a strong, leak-proof seal. Make sure you identify which standard fitting is required. You may need to consider flare angles, O-ring type and size, and seat diameter before selecting the appropriate fitting.
Temperature:
The fittings' temperature rating depends on the material the fitting is made out of and the seal type. O-rings also have a temperature rating. If you operate at higher than that temperature, the O-ring deforms, causing leaks around the fitting.
Pressure:
Different fittings are rated for different pressures. Fittings that seal with an o-ring provide a higher pressure rating than metal-to-metal contact fittings, given that the medium they carry is compatible and the operating temperature does not exceed the rating of the O-ring. When tightening fittings, make sure you don't over-torque them, as this may damage the threads and cause leaks.
Media Compatibility:
The medium the hose assembly carries has to be compatible with the fittings you choose. Petroleum or synthetic media can erode o-rings if they're not compatible, causing hydraulic hose failure. Make sure you read all the technical specifications for them before installing them.
Popular Hydraulic Hose Fittings Manufacturers
There are many manufacturers out there that provide reliable and durable hose end fittings. Some of the most popular are mentioned below.
Parker
Parker is one of the leading hydraulic hose end fittings manufacturers in the world. The company boasts a range of products that are applicable for numerous assemblies.
Eaton
Eaton is a mega-conglomerate with many subdivisions. Two of its subdivisions, Aeroquip and Weatherhead, specialize in manufacturing hydraulic hose ends for the aerospace industry and general use, respectively.
Gates
The good thing about Gates is that they are fluid transfer accessories manufacturers and a solutions provider for their clients. They have a massive catalog of various hydraulic hose end fittings as well as complete hose assemblies.
Frequently Asked Questions
What are the most common types of pipe fittings?
The most common types of pipe fittings include couplings, elbows, tees, reducers, adapters, unions, and caps. Each serves a specific purpose in a piping system. Couplings connect pipe sections, elbows change flow direction, tees split or combine flow, and reducers connect different pipe sizes.
At Titan Fittings, we offer a variety of stainless steel fittings designed to provide secure, reliable connections for industrial, hydraulic, and fluid-transfer applications.
How do I measure pipe fittings accurately?
To measure pipe fittings accurately, first identify whether the connection has male or female threads. Measure the outside diameter of male threads or the inside diameter of female threads using a caliper. Next, determine thread pitch using a thread gauge and identify the thread standard, such as NPT or BSP.
Compare these measurements with a thread identification chart. Also verify the nominal pipe size, connection type, and applicable pipe schedule to ensure compatibility.
Titan Fittings provides technical resources to help customers identify and select correctly sized fittings.
What are brass pipe fittings used for?
Brass pipe fittings are commonly used in plumbing, water distribution, compressed air systems, HVAC equipment, and certain industrial applications. Brass offers good machinability, moderate strength, and corrosion resistance in compatible environments.
However, stainless steel may be a better choice for demanding industrial applications involving high pressures, aggressive fluids, or corrosive environments.
Titan Fittings helps customers evaluate fitting materials based on application requirements, pressure ratings, temperature, and fluid compatibility.
How do I connect two pipes of different sizes?
To connect pipes of different sizes, use a reducing coupling, reducer, or reducing adapter that matches the pipe diameters and connection types.
Concentric reducers maintain a common centerline, while eccentric reducers provide an offset that may be useful for drainage, venting, or avoiding air pockets in certain piping configurations.
Titan Fittings offers stainless steel reducers and adapters for connecting different sizes and fitting configurations while maintaining system integrity.
What industries commonly use pipe fittings?
Pipe fittings are essential in oil and gas, chemical processing, industrial manufacturing, hydraulic equipment, HVAC, agriculture, food processing, and data center liquid cooling.
These industries depend on fittings to connect components, control flow direction, accommodate diameter changes, and maintain reliable fluid or gas transportation.
Titan Fittings supplies industrial fitting solutions for applications requiring dependable performance, material compatibility, and pressure-rated connections.
Why is it important to choose the right pipe fitting?
Choosing the correct pipe fitting helps prevent leaks, pressure loss, premature wear, corrosion, and unexpected equipment downtime.
An improperly selected fitting can compromise system reliability even when the surrounding equipment is correctly specified.
At Titan Fittings, we recommend evaluating material grade, pressure and temperature ratings, thread compatibility, connection dimensions, and operating conditions before selecting a fitting.
Are stainless steel fittings better than brass fittings?
Stainless steel fittings are often preferred for demanding industrial applications because of their strength, durability, and corrosion resistance. Brass fittings are generally more economical and easier to machine, making them suitable for many lower-pressure plumbing and general-purpose applications.
Neither material is universally better. Titan Fittings recommends selecting the material that best matches the operating pressure, fluid chemistry, temperature, environment, and service-life requirements.
Are stainless steel fittings stronger than brass fittings?
Stainless steel fittings generally offer higher mechanical strength than comparable brass fittings, making stainless steel a frequent choice for demanding industrial and high-pressure applications.
However, actual fitting performance depends on the alloy, geometry, manufacturing process, temperature, and published pressure rating.
Titan Fittings recommends selecting fittings based on verified component ratings rather than assuming every stainless steel fitting can withstand higher pressure than every brass fitting.
Which fitting material (Brass or Stainless Steel) is better for high-pressure hydraulic systems?
Stainless steel is often a preferred material for high-pressure hydraulic applications because of its mechanical strength and durability.
However, the correct choice depends on the specific fitting's rated working pressure, sealing design, temperature, and compatibility with the hydraulic fluid.
Titan Fittings recommends using pressure-rated stainless steel hydraulic fittings that meet the system's operating and applicable safety requirements.
Can compression fitting ferrules be reused?
Compression fitting ferrules undergo controlled deformation during their initial installation to grip the tubing and establish a reliable seal.
Previously swaged ferrules generally should not be removed and installed on new tubing because their deformation and gripping characteristics have changed.
Titan Fittings recommends using new ferrules for new tube connections. Reassembly of an existing fitting with the original ferrules attached to the same tubing is a separate procedure that may be permitted by the manufacturer.
What causes reused compression fittings to leak?
Compression fittings may leak after improper reuse because of damaged ferrules, altered sealing surfaces, scratched tubing, contamination, misalignment, or incorrect reassembly.
Removing preswaged ferrules and attempting to install them on different tubing can also compromise the original gripping and sealing geometry.
Titan Fittings recommends inspecting previously assembled components and replacing damaged parts before returning a connection to service.
When should instrumentation fitting ferrules be replaced?
Ferrules should be replaced when they show damage, cracking, excessive wear, corrosion, or other conditions that compromise sealing performance.
New ferrules are generally required when creating a new connection on fresh tubing rather than reassembling an existing qualified assembly.
Titan Fittings recommends following the applicable fitting manufacturer's replacement and reassembly instructions instead of reusing questionable components.
How do you prevent galling in stainless steel threaded fittings?
Thread galling can be reduced by using compatible lubricants or anti-seize compounds where appropriate, keeping threads clean, avoiding cross-threading, and preventing excessive tightening speed or force.
Properly matching threads and following manufacturer installation instructions are also essential.
Titan Fittings recommends inspecting threaded components before assembly and replacing fittings with damaged threads.
Can stainless steel fittings be reused after galling occurs?
Fittings with significant galling, torn threads, or seizure damage generally should not be reused.
Damaged threads can compromise engagement, sealing performance, and the connection's mechanical integrity.
Titan Fittings recommends replacing visibly damaged components rather than attempting to restore severely galled threads for pressure-containing service.
More questions: Pipe Fittings: Types, Applications & Selection