Main Feature
of a pipeline rehabilitation problem, but again either the product has not been well marketed or more often the knowledge that the product is available has yet to reach the designers and procurers within the client companies that should perhaps be considering their use. There is still also the potential that procurement teams are not being allowed to attend events, seminars, open days and conferences in the way that they used to just a decade or two ago and so are effectively not being allowed to keep up with the changing product and equipment world around them. This is often down to the client companies insisting that they do not have the resources to allow these teams the time for such events etc. as they are needed in the office. This could also mean that without knowing it the client companies are costing themselves significant amounts of hard earned cash that might be saved if the procurers knew more about what is currently available to them.
So, there are other options, some of which will not even have been mentioned in the foregoing examples. They cannot however be used if those that need to know them are unware of them, unfamiliar with the fact that they may have application in the circumstance that is being encountered or simply ignoring them because they are stuck in a mind-set that continues to say, even to this day, ‘this is how I have always done this and it has been successful so what need do I have of change?’.
GAS MONITORING
One important sector of the confined space working environment that cannot be overlooked or perhaps over stressed is that of Gas Monitoring.
Whilst those working in the drainage sector often understand the dangers of
potentially explosive Methane or corrosive Hydrogen Sulphide in the work place it all too often the case that they may overlook that simple potential that oxygen levels may fall to dangerously low levels if ventilation is insufficient or if gases leak into the work site from external sources thereby displacing and/or reducing oxygen content the working air space.
To counter this threat there are numerous providers of gas monitors (some of which will be highlighted in more detail later) which can be used prior to and during operations in confined space environments.
There are different types of monitor first there are those that monitor for either a single gas or have sensors that will monitor multiple gases. These can range across various gas types from the toxic/corrosive/explosive to the simple state of the oxygen level in the air, which if it falls too low can be a killer in its own right. The selection of which monitor to use comes down largely to where it is expected to be used. For example inside a water tank where there is not expected to be any presence of toxic, corrosive or explosive gas it may be that only oxygen content needs to be checked. Where however there is a likelihood of a mixture of potential gasses like in a sewer pipeline where circumstances might generate gases from Hydrogen Sulphide to methane and still create an atmosphere lacking in Oxygen then a multi-gas monitor is preferred. It may well be that for companies that work in a variety of situation the selection of a full spread multi-gas monitor is preferred simply because only one unit needs to be purchased to cover all eventualities.
Beyond the range of gases that can be monitored there is the type of unit that can be used. In locations where the works may be longer term or where the atmosphere flows are monitored on entering the works or similar circumstances it may be possible to utilise a static/stationary monitor which can be left in place whilst the work proceeds.
In other circumstances it may be preferred to have gas monitor with the work staff at all times. For this situation belt clip or manually operated gas monitors are available. These are place on the individual’s PPE and goes wherever the operative goes monitoring the gas in the immediate vicinity of the worker.
All monitors are fitted with alarm systems that can be heard (sound alarm), felt (vibrates – which may be good in high noise
6 drain TRADER | May 2018 |
www.draintraderltd.com
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