Thursday, December 28, 2017

Hydraulic Hose Maintenance

It’s never a good idea to wait for something to fail before worrying about maintenance – and with hydraulic hoses – the financial, environmental and safety stakes are so high that neglecting maintenance is extremely irresponsible.


Dangers of Hydraulic Hose Failure Health and Safety

The primary concern of any workplace should be the safety of its workers. If you don’t take adequate care of your project’s hydraulic hoses and fittings, you are putting them at grave risk.

Environmental

Whether through sudden catastrophic failures or incremental leakage over time, hydraulic systems have the potential to cause great environmental damage. Hydraulic equipment leakage in the mining industry alone sees 370 million litres of hydraulic fluid deposited into topsoil, rivers, and forests annually.

Financial Loss

If a hose in your operation explodes or becomes uncoupled, you will also be facing huge financial loss as well as safety and environmental risks. Incremental fluid leakage is also a huge cost – the 370 million litres mentioned above represents an annual loss of around $1 billion worth of hydraulic oil!

Prevention Is Better Than Cure

Of course, even with the best maintenance in the world, leaks and failures will still sometimes occur in your industrial hoses and fittings. However, according to a 2015 study by the Australasian Mine Safety Journal (AMSJ), the majority of problems can be mitigated by regular, targeted maintenance and improved work protocols.

Scheduled Maintenance

The single most important factor is carrying out a regular, scheduled check and maintenance on all hydraulic equipment. The appropriate schedule for maintaining your equipment will be found in your user manual. Up to 50% of equipment failures in the AMSJ study were caused by hose or fitting failures that could be avoided through proper maintenance and inspection.

Maintenance Checklist

Exact maintenance procedures will vary slightly for specific hydraulic products; but as a general rule, the following checklist should be followed and safety guidelines must be rigorously adhered to:
1.Always turn off the equipment’s power and release pressure in hoses before carrying out any maintenance on hydraulic systems.
2.Place equipment and components in a safe or neutral position using a lock and tag procedure to ensure safety for the duration of the inspection.
3.Remove access panels and inspect hoses and fittings for the following signs of damage or leaks:
  • Abrasion, nicks, cuts, cracks, hardness, or colour changes in the hose cover.
  • Signs of leakage, such as puddles of fluid, low fluid levels in reservoir, leakage around the hydraulic fittings, or a greasy or dirty hose.
  • If you suspect pressurised leaks, check for them using a piece of cardboard or plexiglass, never your hand!
4. Repair or replace damaged hoses and other components as necessary.
5. Safely inspect other hydraulic components like valves, pumps, and cylinders for leaks and damage.
6.Once your maintenance check is complete and all faulty parts are repaired or replaced, reinstall the system’s access panels.
7. Now you can safely turn the power back on.
8. Don’t become complacent, pay attention to your hydraulics system in between scheduled checks. Look and listen for anything unusual, and familiarise yourself with the common signs of compromised industrial hoses and fittings.

Hose Replacements and 24/7 Service

If you need a hose replaced and lack the personnel for the job, get in touch with the experts at Hoseright about our replacement and repair services. We offer 24/7 mobile service in Perth and the surrounding areas.

Why Do Hydraulics Hoses Fail?

Even the best hydraulic hoses will fail eventually, but there are some common reasons they tend to perish before their time. At Hoseright we have seen it all when it comes to the best and worst of hydraulic hose maintenance. In this article, we’ll take you through some of the common reasons why hydraulic hoses fail as well as letting you in on simple ways to detect and avoid problems.


The nine most common reasons for prematurely failing hydraulics are:

Operating above Their Rated Pressure

Check that the rated maximum operating pressure of the hydraulic hose is greater than the system’s operating pressure. Hose lines are rated for continuous operation at their specified maximum operating pressure.

Intense or Frequent Pressure Surges

It is normal for hydraulic systems to sometimes develop surges above the relief valve settings. These surges are never good for the hose, but they aren’t a huge problem unless they are too severe or happen too frequently. If this is occurring in your hydraulic system you will save money in the long run by investing in a hose with a higher pressure rating.

High and Low Temperatures

Extremely hot or cold fluid temperatures can also damage your hydraulic hoses. Fluids that are at or above the maximum allowed temperature cause a deterioration of the physical properties of the inner tube and the outer cover of the hose. Fluids at very low temperatures can also become problematic, though this is less common

Ambient Temperatures

Many industrial and factory environments can create high or low ambient temperatures, and these can degrade the cover and reinforcement materials. These temperatures should be considered in conjunction with internal temperatures and adjusted if damage is likely to be done.

Using the Wrong Fittings

Improper fittings and other components can reduce the life of a hydraulic hose. When selecting fittings, a decision must be made between crimped and field attachable styles. A fitting’s configuration, as well as a strategic selection of elbows and jump-size components, should be considered for long-life use.

Improper Routing

Bad routeing of hydraulic hoses can abrade them, and this is responsible for almost 60% of premature hose failures. Make sure hoses don’t need to bend at severe angles and are clamped in place to avoid abrasion. You should also use protective sleeves.

Ill-Advised Vacuum Services

Vacuum servicing is not recommended for double-wire braid or spiral-wire reinforced hoses. If vacuum data is not given in a catalogue, then the hose is usually not recommended for this type of service.

Incorrect Bend Radius

Hydraulic hoses are flexible, but only within limits. The safe operating pressure of hoses is based on their operation when straight. As you bend the hose its ability to withstand pressure drops. Bends that are too tight can cause weakening and outright failure of the hose.

For further information and for all your hydraulic hose needs, contact Hoseright today.