Getting equipped with the proper hose is really not too complicated, if you take the time to answer some simple questions about what you need and how you intend to use the hose you’re seeking.
Although the questions might be simple, as you will see, there may be some considerable amount of thought involved in developing the correct answers.
Although there aren’t any trick questions, the answers you give are important for several reasons. One wrong answer may result in a hose that is too short for the application, or not right for the temperature or environmental conditions.
In these cases, the buyer might be out a few dollars for ordering something that just flat won’t work.
In a more serious scenario, the wrong hose can deteriorate, burst, or fail prematurely. Possibly, the factory will lose important production, or worse – people might get seriously injured, the environment can be degraded, or the equipment in the plant may sustain costly damage.
So, think, be prudent, check and double-check. Like just about everything else in life, it is almost impossible to be too careful – but it is possible to make errors by being in too much of a rush, or by making assumptions that turn out to be incorrect.
The Key To Hose Specifications:
S. T. A. M. P. E. D.
S is for Size:
How long does the hose need to be? Carpenters learn early to measure twice and cut once. It never hurts to be sure that the length of hose you think you need is, in fact, the length of hose you truly need. Meaure carefully. Then, take a moment to think about whether there might be any changes at the site will require a longer hose in the future.
How big does the inside tube (I.D.) need to be? A considered estimate of the volume of material that must flow through the hose at peak times can help provide the answer.
What about the outside diameter (O.D.) There are times when O.D. can be an important consideration, especially if the clearances along the hose’s path are likely to be – or become – tight.
T is for Temperature:
The temperature of the material passing through the hose can be critical to the hose’s durability. Both maximum and minimum temperatures are important to consider. Some tube compounds have limited temperature ranges, but other characteristics or cost considerations that make them acceptable. (See page 7 for a discussion of materials). Environmental temperature can also be important. Just as temperature (or environmental conditions) can affect the tube, so can temperature be an important factor in choosing the proper covering material.
A is for Application:
How will the hose to be used? How will it be attached to current and future equipment? Will it be exposed to possible abrasion, gouging, cutting or crushing? Is the outer part of the hose likely to be exposed to heat, solvents, flames, acids, sun or ozone? Does the hose need to conform to standard specifications, such as FDA, USDA, PMA, SAE, etc.? Which ones? Will the hose face severe bending? What radius? Is static electricity a potential hazard? Is it necessary to provide for hangers to help support the hose?
M is for material:
What is going to be flowing through the tube? Is it gas, fluid, air, water, a chemical or compound? Is the material abrasive? Corrosive? Poisonous? Acidic? An oxidizing agent? Can the material change from a liquid to gaseous state if exposed to the air?
P is for Pressure:
What sort of pressure does the hose have to withstand? What is the working pressure? What is the maximum pressure? Are there going to be major changes in pressure?
E is for Ends:
What goes on the ends of the hose? Are they different? If the ends are going to be different, is there a logical choice to place one type of coupling on a specific end, for proper flow? Howwill the ends be installed? Are there gaskets or O-rings needed? What are their specifications? Are the fittings going to be “fail-safe,” in that they can only make the “right” connections? Is there a recommended fitting for the hose type or application? How easily can the ends be serviced or replaced in the field?
D is for delivery:
Where do you need it? When do you need it? Are there any special considerations about delivery (carrier, packaging, urgency)? Who will receive it? Does it need any form of special handling, expediting, or attention? If the basic type of recommended hose is not immediately available, is there an acceptable substitute that may come to you sooner? Is there a budgetary or price consideration?
The basic questions about hoses can lead to getting the right hose for your situation. As you can see, the questions are not complicated – there just are a lot of them. It is very important to get the right answers and the right hose, so of course, being extra careful is important.
There is one thing you should always remember when it comes to specifying hose: Ask your IBT representative for advice. The IBT people have lots of experience and are there to give you all the help you need. And, they also believe that the only dumb questions are the ones that the buyer doesn’t ask. So, look over the STAMPED list, get your information assembled and talk to IBT.