In this post we will look at some of the common hazards encountered when performing hot work, as well as some that you might not expect. Read below to see our 6 steps to improving safety when performing hot work.
What does the term 'Hot Work' cover?
Hot work is any work task that could produce heat, friction, sparks or flames. It includes welding, soldering, braising, cutting, grinding, sawing and the use of heat guns. Hot work accidents can result in injuries to individuals such as burns, as well as widespread fires causing major damage.
In the worst cases, badly managed hot work can result in explosions and fatalities. Some organizations include other work within their hot work permit system which, although not in itself a fire or explosion hazard, could undermine safety. It is important to keep clear and well-documented permit records, whether that be with safety permit software or a manual log.
Many hot work accidents have occurred when people have carried out hot work on old fuel cylinders or tanks, either as part of waste processing, or as refurbishment. These containers are rarely completely empty, and a small residue of fuel is enough to create a significant fire.
But not all hot work explosions are in industries with obviously flammable gases and liquids. The CSB in the USA identified hot work explosions resulting from flammable gases produced by mixes of cardboard waste, fish waste and even the waste from washing potatoes. In all cases organizations did not test for gas before hot work started because they assumed these slurries were harmless.
Key Combustion Hazards
Even otherwise low risk organizations need to consider how they manage hot work during refurbishments and building projects. Zurich Insurance describe three fires in schools, all started because of a failure to manage hot work properly.
In one fire, the key combustion hazards had not been identified, and therefore when the plastic tarpaulin caught fire, the flames spread quickly to the other combustible materials around the work area. There was no fire extinguisher nearby, which might have been effective if it had been used immediately on a small fire. In the second case the work appeared to have been successful, but no one was asked to check the site for the hour after the work finished. By the time the fire was discovered, it was too late.
In both these cases Zurich concluded that had an effective hot work permit system been in place, the fires could have been avoided, or the impact of them could have been reduced. In a third case there was a permit in place – but it was kept in the contractor’s cabin. The person who completed the permit as a “box-ticking exercise” was not the person doing or supervising the work, and the team doing the work knew nothing about the controls required.
These cases could have been avoided – or the impacts reduced – by applying these 6 steps:
Can the job be done without hot work? Can you buy in parts ready welded or ready cut? Can cold cutting techniques be used? Can smoke detectors be replaced with heat detectors which won’t need to be deactivated for work creating dust or fumes?
2. Identify & Manage hazards
Consider the work location. Can the work be done in an area set-up for hot work? What sources of combustion, ignition and oxygen are in the area? How can these be controlled? In the first school case, some old-fashioned tidying up before they started would have meant there was less fuel to stoke the fire. In more complex cases, systems need to be purged, or sources of ignition isolated.
3. Assign competent people
Many accident reports on hot work explosions mention the lack of adequate training given to the people doing the work. They need to have been trained to identify the hazards, as well as on how to do the work safely.
4. Permit Use
Because hot work can have several essential controls it is not enough to hope that people will remember what to do, based on training that could be several years old.
Permits to work play an important role in your organization safety culture, it reminds people what needs to be checked before, during and after the work. Often it requires people with competencies in different areas to sign off that specific checks have been made. Has the area been cleared of combustion hazards? Has the air been tested for flammable gases? Has the right fire extinguisher been provided?
5. Permit Authorization
Permits must be authorized by someone with the competence to check that the controls are in place. In most cases, it is not advisable for people to sign off their own permits on the work they are doing. Too often permits are signed off by someone sitting in an office without visiting the work area to confirm controls are in place. A Permit to Work software can help you to control permit issuance and acceptance and keep track of everyone involved in the project.
6. Permit Visibility
Permits must be visible and shared by everyone involved in the work. The person managing the work on behalf of the school in the Zurich cases might not have understood all the controls needed, but they could have challenged the contractors before they left the site if they had read the permit requirement for a fire watch. Its a good idea to use a software that stores all permit-related documentation in one place, so the appropriate people have access to all relevant information.
Lack of visibility of permits was one of the contributory factors to the explosion that caused the deaths of 167 people on Piper Alpha in 1988.
Hot Work can be dangerous to those performing it and can have disasterous consequences if the appropriate permit systems are not in place. The EcoOnline Permit to Work Module lets you create, issue and manage your permits with ease, for all manner of hazardous works.
Katika makala hii tutaangalia baadhi ya hatari za kawaida zinazopatikana wakati wa kufanya kazi moto, pamoja na baadhi ambayo huenda usitarajie. Soma hapa chini ili uone hatua zetu 6 za kuboresha usalama wakati wa kufanya kazi moto. Neno 'Kazi ya Moto' linatia ndani nini? Kazi ya joto ni kazi yoyote ambayo inaweza kuzalisha joto, msuguano, cheche au moto. Ni pamoja na kulehemu, soldering, braising, kukata, kusaga, sawing na matumizi ya bunduki joto. Ajali za kazi za joto zinaweza kusababisha majeraha kwa watu binafsi kama vile kuchomwa, na pia moto ulioenea unaosababisha uharibifu mkubwa. Katika hali mbaya zaidi, kazi ya moto isiyosimamiwa vizuri yaweza kusababisha milipuko na vifo. Baadhi ya mashirika ni pamoja na kazi nyingine ndani ya mfumo wao wa kibali cha kazi moto ambayo, ingawa si yenyewe moto au mlipuko hatari, inaweza kudhoofisha usalama. Ni muhimu kuweka rekodi za ruhusa zilizo wazi na zilizoandikwa vizuri, iwe ni kwa programu ya ruhusa ya usalama au kumbukumbu ya mwongozo. Aidha, ajali nyingi za kazi za moto zimetokea wakati watu walifanya kazi za moto kwenye silinda za mafuta za zamani au matangi, ama kama sehemu ya usindikaji wa taka, au kama ukarabati. Ni nadra sana vyombo hivyo kuwa tupu kabisa, na mabaki madogo ya mafuta yanatosha kuanzisha moto mkubwa. Lakini si milipuko yote ya kazi moto ni katika viwanda na gesi wazi flammable na kioevu. CSB nchini Marekani iligundua milipuko ya kazi moto inayotokana na gesi zinazoweza kuwaka zinazozalishwa na mchanganyiko wa taka za makaratasi, taka za samaki na hata taka za kuosha viazi. Katika visa vyote mashirika hayakujaribu gesi kabla ya kazi moto kuanza kwa sababu walidhani hizi slurries walikuwa harmless. Hatari kuu za Kuungua Hata mashirika ya hatari ya chini yanahitaji kuzingatia jinsi wanavyosimamia kazi moto wakati wa ukarabati na miradi ya ujenzi. Zurich Insurance inaelezea moto tatu katika shule, zote zilianza kwa sababu ya kushindwa kusimamia kazi moto vizuri. Katika moto mmoja, hatari kuu za mwako hazikuwa zimetambuliwa, na kwa hivyo wakati tarpaulin ya plastiki ilipowaka moto, moto ulipita haraka kwa vifaa vingine vinavyoweza kuwaka karibu na eneo la kazi. Hakukuwa na kifaa cha kuzima moto karibu, ambacho kingeweza kuwa chenye matokeo kama kingeweza kutumiwa mara moja kwenye moto mdogo. Katika kesi ya pili kazi ilionekana kuwa imefanikiwa, lakini hakuna mtu aliyeulizwa kuangalia tovuti kwa saa moja baada ya kazi kumalizika. Wakati moto ulipogunduliwa, ilikuwa kuchelewa mno. Katika kesi zote mbili, Zurich ilifikia mkataa kwamba ikiwa mfumo mzuri wa kibali cha kazi moto ungekuwa umewekwa, moto ungeweza kuepukwa, au athari zao zingeweza kupunguzwa. Katika kesi ya tatu kulikuwa na kibali mahali <unk> lakini ilihifadhiwa katika cabin ya mkandarasi. Mtu ambaye alimaliza kibali kama "mazoezi ya kuweka alama kwenye sanduku" hakuwa mtu anayefanya au kusimamia kazi hiyo, na timu inayofanya kazi hiyo haikujua chochote juu ya udhibiti unaohitajika. Matukio haya yangeweza kuepukwa au athari zingeweza kupunguzwa kwa kutumia hatua hizi sita: Je, kazi inaweza kufanywa bila kazi ya joto? Je, unaweza kununua katika sehemu tayari welded au tayari kukata? Je, mbinu za kukata baridi zinaweza kutumiwa? Je, detector moshi inaweza kubadilishwa na detector joto ambayo haitakuwa na haja ya kuwa deactivated kwa ajili ya kazi ya kuzalisha vumbi au moshi? 2. Uwezekano wa kupata Kutambua & Udhibiti hatari Fikiria eneo la kazi. Je, kazi inaweza kufanyika katika eneo kuanzisha kwa ajili ya kazi moto? Ni vyanzo gani vya mwako, mwako na oksijeni vilivyo katika eneo hilo? Hizi zaweza kudhibitiwaje? Katika kesi ya shule ya kwanza, baadhi ya utaratibu wa zamani kabla ya kuanza ingekuwa na maana kulikuwa na mafuta kidogo ya kuchoma moto. Katika visa tata zaidi, mifumo inahitaji kusafishwa, au vyanzo vya moto kutengwa. 3. Uwe na mtazamo wa kweli Ripoti nyingi za ajali za mlipuko wa kazi moto zinataja ukosefu wa mafunzo ya kutosha kwa watu wanaofanya kazi. Wanahitaji kuwa wamezoezwa kutambua hatari, na pia jinsi ya kufanya kazi kwa usalama. 4. Uwe na uhakika Kwa sababu kazi ya joto inaweza kuwa na udhibiti kadhaa muhimu, haitoshi kutumaini kwamba watu watakumbuka nini cha kufanya, kulingana na mafunzo ambayo yanaweza kuwa na umri wa miaka kadhaa. Vipimo vya kazi ni muhimu kwa utamaduni wa usalama wa shirika lako, kwa kuwa huwawakumbusha watu nini kinachohitaji kuchunguzwa kabla, wakati na baada ya kazi. Mara nyingi inahitaji watu wenye uwezo katika maeneo tofauti kusaini kwamba ukaguzi maalum umefanywa. Je, eneo hilo limeponywa hatari za kuchomwa? Je, hewa imepimwa ili kuona kama kuna gesi zinazoweza kuwaka moto? Je, kifaa cha kuzima moto kinafaa kimetolewa? 5. Uwe na mtazamo mzuri. Ruhusu idhini Ruhusu lazima kuidhinishwa na mtu na uwezo wa kuangalia kwamba udhibiti ni katika nafasi. Katika hali nyingi, haipendekezi kwa watu kusaini vibali vyao wenyewe juu ya kazi wanayofanya. Mara nyingi vibali hutiwa sahihi na mtu anayeketi ofisini bila kutembelea eneo la kazi ili kuthibitisha udhibiti upo. Programu ya idhini ya kufanya kazi inaweza kukusaidia kudhibiti utoaji na kukubalika kwa idhini na kufuatilia kila mtu anayehusika katika mradi. 6. Uwe na uhakika Ruhusu Uwezo wa Kuonekana lazima uonekane na kushirikiwa na kila mtu anayehusika katika kazi. Msimamizi wa shule ya Zurich, ambaye alikuwa akisimamia kazi hiyo, alidai kwamba kazi hiyo haikuwa ya kawaida, lakini kwamba ilibidi afanye kazi hiyo kwa kupewa idhini ya kazi. Ni wazo nzuri kutumia programu ambayo huhifadhi nyaraka zote zinazohusiana na kibali mahali pamoja, hivyo watu husika wana upatikanaji wa habari zote muhimu. Uharibifu huo ulisababisha mauaji ya watu 167 kwenye meli ya Piper Alpha mwaka 1988. Kazi ya moto inaweza kuwa hatari kwa wale wanaofanya na inaweza kuwa na matokeo mabaya ikiwa mifumo sahihi ya kibali haipo. EcoOnline idhini ya kufanya kazi Moduli inaruhusu kujenga, kutoa na kusimamia idhini yako kwa urahisi, kwa ajili ya aina zote za kazi hatari.