Hose Pros 101: The Basics – What Goser Teaches Your First Day on the Job

Hose Pros 101: The Basics – What Goser Teaches Your First Day on the Job

Hose Pros

Hose Pros 101

Do you need to learn the basics of hose and how they’re used in industry? Maybe you need to train a new maintenance technician, maybe you need an engineer fresh out of college to understand how hydraulic hose systems work, or maybe you’re just curious and want to know about hose. This article is for you. In fact, we just hired an engineer with 20 years’ experience, and even he can learn something from this article. When it comes to the hose industry, understanding the various applications and hose constructions is vital to speccing the proper hose for your job.

Hose Construction

A hose is commonly made up of a tube, reinforcement, and a cover. This is a technicality, but if there is no reinforcement, then it’s just called tube or tubing. This is most seen with plastics. But if it’s got reinforcement, it’s a hose, and it’s what we’re talking about in this article.

Hose is typically broken into five categories: hydraulic, industrial, metal, Teflon (PTFE, fluorocarbon tube), and composite. Metal, Teflon, and composite are designated by their construction. Metal is made entirely of stainless steel or other non-corrosive metals, Teflon is made of Teflon, and composite is hose made of distinct, individual layers.

Hose Construction

Tube

​Working our way from the inside out, the tube’s job is to convey material, so it must be chemically compatible with what’s going through the hose and able to handle specific temperatures. It also must be nearly impermeable and capable of holding pressure. I say “nearly impermeable” because all material permeates at some rate. Think about your car tires. They hold air for months, but eventually need filled up to keep them at the right pressure. This is the permeation we’re talking about. It’s not often an issue with hose, but it’s something to be aware of. Metal is the closest to impermeable and some plastics perform well too. 

Reinforcement

The tube is supported by the reinforcement, which is the backbone of hose, and supplies its strength and pressure capability. It comes in many shapes, sizes, and materials, the most of common of which are high tensile steel wire, textiles, and synthetics. Some specialty materials even include Kevlar, the stuff they make bullet proof vests from. It is wrapped around the hose in either a braided or spiraled configuration. This allows the hose to hold pressure that is both pushing out radially and axially. 

Axial Radial Drawing

Braid and spiral reinforcement give the hose positive pressure carrying capability, while a helix works in the other direction, when there is a negative pressure in the hose. A helix is made of metal or hard plastic and acts to keep the hose round when the pressure inside is acting to collapse the hose, especially important in suction applications.

Cover

The cover is applied over the reinforcement and acts to protect it from abrasion and corrosion. Covers must be able to withstand outside temperatures, abrasion, impact, ozone, industrial chemicals, and anything else that can harm the reinforcement. A good example of the importance of the cover is a hydraulic hose with a small nick in the cover, which may not seem like a big deal … until later that year when the steel braid rusts and becomes weak from corrosion. When that hose blows, it will blow at the spot that’s been damaged.

Covers are oftentimes supplemented with added accessories like fiberglass and silicone sleeves for temperature, or plastic or steel wrap to aid in abrasion resistance. Whatever part of the environment may harm your hose needs accounted for, and the cover is what is going to protect it. We can always add layers of protection if the off-the-shelf construction is not enough.

Metal and Teflon hose have no cover by design. They use a stainless-steel braid reinforcement so corrosion is rarely a concern. Since it is metal on the outside, people often think of it as a “tough” hose. Don’t be fooled by this misconception. Those wires are tiny, maybe .015” thick and sometimes less. If you let a metal hose drag on the concrete and those wires get ground from .015” to .005”, then guess where the hose will break … right there at the spot it was dragged. 

ID / OD

Hose is defined by its I.D., or inside diameter. For example, a 1” hose has a 1” inside diameter. When measured with calipers it will be pretty close to 1.00”. I say this because other industrial materials like tube and pipe are different. 1” pipe is neither 1” I.D. or 1” O.D. (outside diameter), but it’s close, 1.05” for Sch. 40 pipe I.D. and a 1.315” O.D. Tube, as we mentioned earlier, is measured by its O.D.

When we talk about hose size, especially hydraulic hose, we talk in terms of 16ths. A -12 hose, read “dash twelve”, is ¾” because 12/16=3/4.

Parker Hose Size

OD is important because, when coupled with I.D., it gives us the wall thickness of the hose. Wall thickness is important because we use it to determine crimp diameters for industrial hose assemblies, where the fabrication is part science, part art, because the fabricator is determining the crimp size, and it can be different on the same hose assembly. Yes, you read that correctly. Wall thickness can vary enough throughout the hose that crimps made on two ends of one hose can have differing crimp diameters, while still maintaining the same compression ratio. Compression ratio is how much we compress the wall of the hose between the ferrule and the hose barb. Compressions of as little as 12% and as much as 22% are not uncommon. This is where the art part comes in to play, knowing when to be closer to 12% or closer to 22%. Things like the hardness of the hose compound and how the hose reacts when crimped need to be considered. Some larger diameter hoses can vary by ⅛” wall thickness in the same hose.

For hydraulic hose, it must be precise and consistent, because the specs for crimp diameters have a tolerance of +/- .005”. This implies the I.D./O.D. are kept to a tight tolerance so the crimps can also be held to a tight tolerance.

A Hose for Every Application

When you start looking through hose catalogs, one thing becomes apparent very quickly … there seems to be a hose for every application. In a hydraulic hose catalog, there are textile reinforced and steel reinforced hose constructions—one wire, two wire, four wire and six wire—rubber compounds for high heat and compounds for the Arctic, and compounds for corrosive hydraulic fluid, and on and on. And that’s just the hydraulic hose catalog. Then there’s the Industrial hose catalog, it has WAY MORE options for specific applications: steam, superheated steam, water suction, water discharge, air, high pressure air, sand blast, concrete … you get what I’m saying. The catalog is huge, and they all have a specific construction to address a specific application.

STAMPED – Selecting the Right Hose

We use the acronym S.T.A.M.P.E.D. to help determine which hose is the best one for a given application. Size, Temperature, Application, Media, Pressure, Ends, Details. If you can answer all those criteria, then you will be well on your way to the best hose. Check out our full blog post to get details.

A Word on Pressure and Working Pressure

The hose industry typically uses a safety factor based on burst pressure to determine a hose’s working pressure. The most common safety factor is 4:1. This means a 4,000-psi hose will burst at over 16,000 psi in a test. Other common safety factors are

  • 10:1 for steam
  • 3:1 for water
  • 2:1 for hydraulic jacks

Manufactures will also play with safety factors to make their hose appear “better” or more capable than a competitor’s hose. It’s not frequent, but it’s definitely common. Be aware that sometimes the same hose (essentially) produced by two different manufacturers can have different working pressures, because one tests this way and the other that way, or they have engineering departments that simply take a different approach. What I’m saying is it’s not black and white, sometimes it’s gray.

Hose Life

Like any industrial product, a hose has a life expectancy. Some applications may only give the user a few weeks or months, like carbon injector hose or abrasive material handling. The application chews up the tube so fast it’s normal to have to replace it regularly. When the finance people see the frequency of replacement, they begin pushing for other solutions like ceramic lined tubes that are crazy expensive, but worth it, because they extend the life of the hose. Other factors, like temperature and corrosion, will also shorten the life of a hose. Another situation, sometimes unexpected, is when you max out two constraints of the hose, such as pressure and temperature. If you run the hose at max pressure and max temperature (or any other maxed out condition) it seems to really reduce life expectancy. Specs do not exist independently. If you’re pushing it on more than one aspect of the hose, consider upgrading to get more life.

Safety

It goes without saying that hose safety, proper construction, and specification are important, but let’s say it. Some applications are obviously dangerous: hazardous chemical transfer, bull hose on a compressor, hydraulic hose on a lift supporting a worker, to name a few. But even a ⅜” air line in a garage can whip if an end blows off and it can hit you pretty hard. At the beginning of a hose’s life it needs to be specced right and built properly. Once in use it needs to be examined regularly and taken out of service once there is damage or after its known service life is up.

Hope you found this article valuable and enjoyed Hoser’s Hose Pro insights.

TCH Industries

We. Are. Hosers.

Our focus and obsession is the distribution and fabrication of hose for industry and hose related products. Founded nearly 40 years ago, we are proudly owned and operated by the same family. Our manufacturing partners are some of the biggest and best names: Eaton, Parker, Dixon Valve, Hose Master, Brennen, Hannay Reels, and many others.

In short, we are a customer-centric hose company filled with happy professionals who can help you meet all your hose related needs. If you have any questions, please reach out to us by filling out the form below!

  • This field is for validation purposes and should be left unchanged.

 

How to Design the Right Hose: S.T.A.M.P.E.D.

How to Design the Right Hose: S.T.A.M.P.E.D.

Hose Design & Hose Assembly

In order to design a cost-effective, long-lasting, and safe hose assembly, you need to understand a few things about hose design. Let’s face it: when deciding on a hose, the three factors that stand above the rest are safety, money, and longevity. Choosing the wrong hose can lead to failures in service, costing you major dollars and potential injuries on the job site.

Trust us, we’ve seen it.

When a hose fails, your job site shuts down, and hopefully no one was hurt. Maybe you have a spare, or for those of us not so prepared, now you need to call your local hose shop. You send one of your guys with the broken hose and get a new one made, while the other three guys in the crew play games on their phones. An hour later, your new hose arrives, and you spend the next half hour installing it and cleaning up.

In all reality, this is not a bad scenario compared to what it could be: a chemical hose leads to a spill with dangerous vapors; a high-temperature steam hose burns somebody; a hydraulic hose breaks and drops a load. It can be way worse than a few guys not working while a hose is being made.

You need to choose the right hose.

Hose industry insiders use an acronym called S.T.A.M.P.E.D: Size, Temperature, Application, Media/Material, Pressure, Ends, Details.

Size

Of course, this is first. Size is one of the most straight forward considerations when selecting a hose. Start with the ports you’re connecting to; if they’re both the same size, then choose a hose that matches. With differing port sizes, there is no standard rule. If flow rate is important to you–maybe you’re running air tools–then you may want to choose a hose size that matches the larger port.

Regarding length, it depends. Some hoses, like air and water hoses, might come in standard lengths of 25’, 50’, and 100’. If one of these is long enough for what you’re doing, then it’s the right length. Other times, you’re routing a hose inside of a machine, and it has to be exact. If it’s too short, it doesn’t reach, and if it’s too long, it rubs against adjacent components. In short—no pun intended—make sure it’s long enough, but not too long.

Temperature

Choosing the right material that can withstand the temperatures your hose will see is the difference between a hose that lasts years, or one that lasts for days. Temperature can shorten the lifespan just as quickly as abrasion or chemical incompatibility. Take a look at these common hose materials to see the wide range of temperatures they can handle:

  • PVC: 0 to +140°F
  • Standard Rubber: -40°F to +212°F
  • Engineered Rubber: -70°F to +302°F
  • Teflon: -65°F to +400°F
  • Silicone: -65°F to +500°F
  • Stainless Steel: below -238°F to +1500°F

This is why we have to start looking at a hose as having two environments: there’s one inside and one outside. On the two extremes, a cryogenic hose has to have a stainless-steel tube that can withstand extreme colds, while a furnace-door hose has to have a fiber glass cover to withstand red-hot steel just feet away. It’s important to be aware of both, but one will usually dominate your decision in selecting a particular hose.

Pressure

If you have a 2500 to 4000-psi pressure washer, then feel comfortable using a one-braid, 4000-psi hose. You don’t need to upgrade. More isn’t always better. Industrial-grade, one-braid pressure washer hoses are easier to handle than two-braid. While two-braid hoses are used in 5000 & 6000 psi applications where extra strength is required, they come at the cost of decreased flexibility and increased weight.

Hose Application—What Makes Your Hose Unique?

Luckily for you, so many hose products are categorized by their application: chemical hose, tank truck hose, brewery hose, air hose, the list goes on… and on. If you open up a catalog from any hose manufacturer, you’ll find a nearly endless list of common, application specific hoses. Other times, you need to tease out what’s driving your spec in a particular direction.   

You can measure a precise size, pressure, and temperature, but application can sometimes be a bit more nuanced. For instance, if you’re specifying a hose for adhesive, you are going to want a smooth, non-stick hose. You might choose a nylon hose, often times called a paint spray hose. In this instance, your paint spray hose is now an adhesive hose, and that’s ok. If you chose a Teflon hose for this application, that would work too. There isn’t always a silver bullet, and, often times, there’s more than one right answer.

hose assembly

Example 1:

The hydraulic lift on a utility truck fixing power lines should not use a wire-reinforced hydraulic hose; instead, the right choice is a non-conductive, thermoplastic hydraulic hose. This protects the utility worker and equipment from electric shock.

hose assembly

Example 2:

High-pressure, hydrogen gas in the heat of the desert. Thermoplastic hose can handle high-pressure gases, and they can handle desert heats. However, we’ve found that as the temperature rose in testing, the diffusion rate through this hose exceeded allowable rates and appeared as a leak. The hose was working properly, but the application didn’t fit, even though the pressure and temperature were in spec. In this case, a metal hose was a better choice because it had a zero-diffusion rate, regardless of temperature. 

Application is also why we choose accessories, which we’ll talk more about in the ‘Details’ section.

Media & Material

It’s important to know the media—what’s running through your hose—or the media that may come into contact with your hose from the outside, because it has to be compatible with the hose cover. When choosing a hose material, for both the tube and cover, make sure the hose material can handle the media it will come into contact with. If you have an acid-transfer application, you need a tube material that can handle acid. If you’re refurbishing a sandblaster, you need a tube that can handle abrasion. Yes, it’s that simple.

Pressure

Pressure is not just an ultimate number. It sounds straight forward, but there are a couple other considerations. Let’s get the obvious out of the way. If you have an application running a constant pressure without much fluctuation at room temperature, then you need to have a hose rated for that pressure.

Heavy construction equipment is a good example where pressure alone is not enough to choose the right hose. When choosing a hydraulic hose that will see impulse and pressure spikes, sometimes we select a spiral hose over a braided hose. Since braided hose is woven, the impulse and spikes force the wires to grind against themselves. Spiral construction allows the layers of reinforcement to flex without grinding against the next layer. This makes spiral hose perfect for heavy construction. 

Metal hose—stainless steel wire over a corrugated, stainless steel tube—requires special consideration for pressure de-rating. 

When impulse is present, we de-rate by half. If there are intense pressure spikes, we de-rate by 1/6th. For example, if a 600-psi hose is being used on a piston pump and will see impulse, we de-rate it to 300 psi. If that same 600-psi hose were used downstream of a valve and sees a pressure spike when the valve opens, it would be de-rated to 100 psi.

Temperature can have a huge impact on pressure rating, particularly in PVC and metal hose. As temperature goes up, strength goes down. For instance, a PVC hose gets an x.5 multiplier at 110°F. It loses half its strength at 40°F above room temperature! By the way, all catalog pressure ratings are assumed to be at 70°F. Metal hose has a much more gradual decline and can be used at very high temperatures. You just need to know the hose working pressure and temperature, and use this chart to determine the de-rated working pressure:

https://www.hosemaster.com/technical-information-flexible-metal-products/temperature-derating/

Side note—most hoses have a 4:1 safety factor. This means they burst at four times higher than their working pressure (3000 psi working pressure = 12000 psi burst). Certain specialty hoses, like steam hose and jack hose, use a different safety factor, but 4:1 is the norm.

Ends

You need to select hose ends that match the thread and connection style of your port and are made of a material compatible with your application/media. There are many, many connection styles: flange, quick disconnect, SAE thread, metric thread, and on and on. Common materials include plated carbon steel, 304 stainless, 316 stainless, brass, plastic, and even custom materials. To avoid getting into the weeds here, if you don’t know what end you need, call us!

Details

Yes, the industry struggles a little with what ‘D’ in S.T.A.M.P.E.D. means. ‘Delivery’ is the most common interpretation, but it’s better referred to as ‘Details’. It certainly includes delivery date, but it means so much more. It’s kind of intended to be a catch all for everything that makes your hose right. Does your hose need any of these?

  • Bend restrictors
  • Abrasion protection
  • Fire sleeve or thermal protection
  • Electrical conductivity
  • Testing & certifications
  • Tagging & labeling
  • Phase angle
  • Packaging
  • Cleaning

This is S.T.A.M.P.E.D. If you can respond to all these points, then you have the information needed to design the right assembly. If you want help, you can call the Hose Pros at TCH Industries, and we’ll guide you through the S.T.A.M.P.E.D.  process. Let our nearly four decades of experience work for you.

TCH Industries

We. Are. Hosers.

Our focus and obsession is the distribution and fabrication of hose for industry and hose related products. Founded nearly 40 years ago, we are proudly owned and operated by the same family. Our manufacturing partners are some of the biggest and best names: Eaton, Parker, Dixon Valve, Hose Master, Brennen, Hannay Reels, and many others.

In short, we are a customer-centric hose company filled with happy professionals who can help you meet all your hose related needs. If you have any questions, please reach out to us by filling out the form below!

  • This field is for validation purposes and should be left unchanged.

 

Pressure Washer Hose Buyer’s Guide

Pressure Washer Hose Buyer’s Guide

We know searching for the right pressure washer hose can be overwhelming. The first page of Google points you towards all the big box and online stores you can think of. Their options are fine for a casual user who wants to wash his car, but what if you need to something a little more industrial? There are a lot of options and considerations when choosing the right hose. This guide will teach you about them and help you understand what you need.

Is Leaving a Mark Avoidable? Technically, No.

Pressure washer hose is notorious for leaving marks on whatever you’re washing. Dragging a hose across a deck may not always leave a mark, but vibrations from a running pump, alongside the abrasion caused by frequent dragging, will definitely speed up the wear of the cover and, consequently, leave a mark on your driveway or deck.

On the bright side, markings can be reduced by using the right hose. Color, cover material, and proper use can help. Light colored hoses are the best option, with markings standing out less than their black counterparts. Our customers have had the most success with gray. We’ve tried black, blue, and white, all marking more than gray covers.

Synthetic rubbers have the best abrasion resistance, because they are specifically designed to be non-marking. Plastic hoses—like those found at Lowes and Home Depot—are fine when you need a light-duty hose, but they don’t hold up as well.

Pressure Washer Hose

Size and Length Matters… Duh

Choosing the right diameter is often driven by the port in the pump. Most people choose a 3/8” hose when they have a 3/8” port, a 1/4″ hose with a 1/4″ port, and so on. Using 3/8” hose will provide more pressure and more flow at the gun. This is most important with 1/4″ connections. Pressure drop in a 1/4″ hose can be nearly 400 psi, whereas a 3/8” hose would only give you a 50-psi pressure drop (at 3 gpm in a 100 ft hose).

Keep in mind: the longer the hose, the greater the pressure drop. We don’t want to raise needless concern here, but if you can get away with a 50-footer, don’t buy the 100. More import than pressure drop, longer hoses are hard to handle. If you’ve ever tried to coil a 100-footer with a gun on the end, you know exactly what we’re talking about. We recommend a reel for anything longer than 50 feet, especially if you’re a daily user.

Is It Time To Replace My Hose?

The most common indicator that it’s time to replace your hose is a damaged cover with exposed wire reinforcement. The cover’s job is to protect the wire from corrosion, which leads to reduced pressure as the reinforcement deteriorates. If you can feel a broken wire poking through the cover, it’s time for a new hose. A broken wire is a leak path for water, causing corrosion; and, more importantly, you’re asking for a nasty cut and a trip to the Minute Clinic for a Tetanus booster.

Trust us, we’ve learned the hard way.

Don’t forget to keep a close watch on the hose ends, as they can accumulate rust and calcification on the inside, leading to reduced flow.

Pressure

If you have a 2500 to 4000-psi pressure washer, then feel comfortable using a one-braid, 4000-psi hose. You don’t need to upgrade. More isn’t always better. Industrial-grade, one-braid pressure washer hoses are easier to handle than two-braid. While two-braid hoses are used in 5000 & 6000 psi applications where extra strength is required, they come at the cost of decreased flexibility and increased weight.

Which End Connection Do I Need?

Pressure washer connections typically are either Metric M22 X 1.5 (14mm tube is the most common), 3/8” NPT pipe thread, or straight-through quick connects.  The M22 male thread is found on the pump. From here there may be an adapter to 3/8” NPT or a quick disconnect. Make sure to use some kind of thread sealant like Teflon tape if you have NPT. NPT threads don’t seal by themselves and require help.

*Electric units sometimes have the M22 X 1.5, 15mm threads. There are two ways to determine if you have threads for 14mm or 15mm tubes. One is to measure the inside of the male connection after the taper using calipers. It will be very close to either 14mm or 15mm. The other is to measure the diameter of the male part in the middle of the female threads. This feature, usually with an O-ring, mates up with the taper inside the male threads. It will measure very close and just under 14mm or 15mm.

Cleaning with Chemicals, Detergents, & Hot Water

Sometimes, pressure alone isn’t enough. The surface you’re cleaning might require some extra elbow grease. If you use chemicals, detergents, or hot water, you need a hose that can handle it. Hoses made with plastic tubes are often times good with chemicals and detergents but don’t do well with hot water. Synthetic rubber is engineered to handle a wide range of industrial cleaners and handle hot water. Hoses rated to 311°F will provide the longest life if you routinely use a heater in your washer system. Heat and chemicals can quickly break down your hose.

Let me tell you a story:

We were once selling a “water cooling” hose to a steel mill. The application was only 160°F, so we chose a common water transfer hose rated for 180°F. This was the same rating as the equipment manufacturer’s hose, so we felt comfortable replicating the spec.

The manufacturer’s hose lasted three months, and so did ours.

At first, we didn’t even think temperature mattered; after all, our hose was rated for the application. After some investigation, we decided that temperature might be our culprit. We specced a 350°F hose ten years ago, and it’s still going strong. This taught us a valuable lesson: hot water can wreak havoc on your hose, and if you have a burner, you need a hose specifically designed for hot temperatures.

PowerKlean 4000

TCH has designed a hose from the ground up to address the needs of pressure washers all over. PowerKlean 4000 has all the best attributes combined into one hose. It’s a non-marking, high-temperature, light and flexible hose that handles all pressure washer applications up to 4000 psi. The PowerKlean 4000 comes in standard lengths of 50 and 100 feet, and we can accommodate any custom length you require, just call and get a quote.

  • 3/8” I.D.
  • 4000 psi
  • Gray synthetic, non-marking cover, synthetic tube
    • Resistant to weather, oil, and O-zone
  • 311°F/155°C
  • One-braid, steel-wire reinforcement

TCH Industries

We. Are. Hosers.

Our focus and obsession is the distribution and fabrication of hose for industry and hose related products. Founded nearly 40 years ago, we are proudly owned and operated by the same family. Our manufacturing partners are some of the biggest and best names: Eaton, Parker, Dixon Valve, Hose Master, Brennen, Hannay Reels, and many others.

In short, we are a customer-centric hose company filled with happy professionals who can help you meet all your hose related needs. If you have any questions, please reach out to us by filling out the form below!

  • This field is for validation purposes and should be left unchanged.

 

2019 Spring Garden Hose Sale

Garden Hose Sale

It is that time of year again. With the weather starting to warm up, and summer just around the corner, TCH Industries is stocked to the ceiling with Garden Hose.

TCH Industries 2019 Garden Hose Spring Sale has unbeatable prices, with hose in stock and ready to take home today.

Whether you are in need of a 25′ hose assembly, or 100′ hose assembly, TCH Industries has it in stock!

All garden hose is made with the quality that you expect from Parker Hannifan, at a price you can’t beat anywhere else!

Please call us at 330-487-5155, or email us at sales@tchindustries.com, for more information!

 

Understanding Foreign Threads in the Hydraulic Industry

Understanding Foreign Threads in the Hydraulic Industry

Understanding Foreign Threads In The Hydraulic Industry

In an ever-changing world, it is hard to ignore the increasing amount of foreign threaded connections in the hydraulic industry. Whether it is in a port connection, to a hydraulic hose, even lubrication and grease fittings, they seem to be in all areas of a hydraulic application. Understanding foreign threaded connections can be very cumbersome, and confusing! But being able to understand, and more importantly identify foreign threads can make the difference on whether a customer purchases from you again or goes to the competition.

With the increased amount of goods purchased from over-seas manufacturers, it only makes sense that those goods will have foreign threaded connections. Essentially, there are only three countries that still use the Imperial System; The United States of America, Liberia, and Myanmar (formerly known as Burma). So, it’s no wonder why foreign threads are more prevalent than ever in the hydraulic industry. Here is a list of the most common Foreign threads in the Hydraulic Industry.

British Threads

The two types of British Threads are, Parallel (BSPP) and Tapered (BSPT). British Parallel threads are commonly referred to as a “G” thread, whereas British Tapered threads are referred to as “R” thread. They are measured in Nominal Sizes, and the threads are measured in Threads per Inch.

There are three sealing methods to a BSPP thread. This thread can seal using the BS 5200 60° Cone-Seat, which is like how a NPSM thread will seal, with an external Gasket, or the ISO 1179 O-Ring. These gaskets can include Bonded Seals, O-Ring and Washer combination, and Elastomeric Seals. The O-Ring Only Style is exclusive and will only seal with the correct size O-Ring, like the SAE J514 Straight Thread O-Ring Boss.

The British Tapered threads are only intended to seal on the flanks of the threads, like how a NPT thread seals, and are generally seen on lower pressure, or schedule pipe, applications.

Metric (DIN) Threads

There are also two styles of Metric Threads, Parallel or Tapered. Metric threads are measured, in millimeters, on the outside diameter and pitch of the threads. Generally, there are 3 thread pitches in metric fittings, pertaining to the hydraulic industry; 1.0, 1.5, and 2.0.

Just like the British Parallel threads, Metric Parallel threads can seal in one of three ways. Either, it can seal on the 24° Tube Seat, like an Ermeto® fitting, it can seal with an external gasket, or with the ISO 6149 O-Ring. The external gaskets are alike to the British Parallel style Bonded Seals, O-Ring and Washer combination, and Elastomeric Seals, ignoring the true size of the seal. The ISO 6149 O-Ring Only style is exclusive and will only seal using the correct O-Ring, like the SAE O-Ring Boss style previously explained.

Metric Tapered threads are generally seen in low pressure, and lubrication applications. They are intended to seal on the flanks of the threads, like NPT threads.

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

Japanese (JIS) Threads

Japanese threads, or JIS, are easy to understand. They are nominally sized, and the threads are measured in Threads per Inch. JIS threads are the exact same size, pitch, and thread count as British threads. The only difference is that JIS has a 30° outward flare, similar to the 37° flare that we see on JIC fittings. There are more Japanese threads that exist in hydraulic systems, but to keep things as “easy” as possible, we will not go over those at this point.

Komatsu Threads

If this isn’t confusing enough, Komatsu threads tie in Metric thread pitch along with the JIS 30° flare. Komatsu threads are only ever used on Komatsu made machinery. Which is why when identifying threads, it never hurts to ask what kind of machine that the thread originates from.

TCH Industries: Hose, Fitting, & Sealing Experts

The highly trained sales staff at TCH Industries has been dealing with foreign threads for over three and a half decades. By partnering with world-class suppliers of fittings and adapters of every type, TCH has developed a top reputation for quality, reliability, exceptional service, and professionalism.

If you wish to receive a quote from TCH Industries for foreign accessories, please complete the easy-to-use online form that requests information about your needs in a simple questionnaire.

Best yet, for easy-to-understand answers from the hose and fitting pros at TCH, the solution is to visit in person the TCH Hose Center at 2307 East Aurora Road, Twinsburg OH, only 25 miles from the heart of Cleveland.

Parker Twinhammer Hose

Parker Twinhammer Hose

 

 

Twinhammer™ Dual Air/Water Jackhammer hose is a unitized, specially bonded dual air and water hose assembly designed to simultaneously transfer air to power jackhammers and water to suppress silica dust during tool operation. Series 7084 hose assemblies incorporate crimp couplings for durability and security, with universal end styles for quick connection/disconnection. Easy to handle and maneuver, these assemblies are an integral component of a silica dust suppression system to help meet the OSHA Respirable Crystalline Silica (RCS) Standard.

 

Twinhammer hose assemblies feature durable abrasion resistant and chemically bonded lines for easy handling. The design eliminates the need for intrusive clamps, straps, tape or zip ties used to cobble together a makeshift harness for independent air and water hoses. The assemblies incorporate universal end styles for quick connection/disconnection to the air supply, and rust resistant brass male NPT couplings for easy attachment to the water supply and spray nozzle.

 

For more details click here

Scroll Up