Work At Height Survey

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Work at Height Survey (WAH) The following WAH survey results could be used for critical high areas which might require special procedures / PPEs. Please note that the recommendations provided may not exactly suit your WAH problem but can provide some valuable thinking triggers. Serial Number 1.

Area Flare Stack A (40 m) Lattice Steel Structure type

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Height Job/s description

Recommended safe WAH procedures / PPE Structure painting / Maintenance of -FBH, Safety Goggles, Hard Hat/, Safety flare stack / Cable laying in the Shoes vertical cable tray - Vertical life line with retractable cable fall arrest device, anchored to the flare stack top & at various levels, FBH attached to life line, work to be carried out using working saddle, descending device

Control Room

Cable installation / structure painting -FBH with 2m long lanyard, Safety Goggles, / structure maintenance Hard Hat/, Safety Shoes 60 m horizontal cable tray -Horizontal steel life line attached (detachable section behind control room type) with fixed anchor rings along the cable tray section anchored at both ends and in between to permanent structures, with FBH connected to the life line Chimney & Storage Tank Outside Painting / maintenance -FBH with 2m long lanyard, Safety Goggles, Hard Hat/, Safety Shoes -Working Aluminum saddle attached to vertical steel life line, descending device , manual operation Urea Plant B Electrical lamp replacement -FBH with 2m long lanyard, Safety Goggles, Hard Hat/, Safety Shoes Pipe Rack -Use ‘A’ type retractable ladder, FBH lanyard attached to the top section of pipe rack through a fall arrest device

Work At height Survey

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Compressor Train B

Painting work

43.1 m elevation

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Compressor Trains (A & Maintenance / repair / painting work B) 83 m elevation

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-FBH with 2m long lanyard, Safety Goggles, Hard Hat/, Safety Shoes, safety net (install from 7 ‘ from the permanent structure) with more tie-points, without joints in nets - Use of rescue & descent device using vertical steel / polyamide lifeline with FBH attached with fall arrest device (OPTIONAL) -FBH with 2m long lanyard, Safety Goggles, Hard Hat/, Safety Shoes, safety net (install from 7 ‘ from the permanent structure) with more tie-points - Us of Tripod & retractable cable fall arrest device, to be positioned atop the 83 m elevation and lowered. Optionally, Aluminum working saddle also can be used

Ammonia Storage Tank A

Maintenance / repair / painting work -FBH with 2m long lanyard, Safety Goggles, at the tank dome area Hard Hat/, Safety Shoes, safety net (install Refrigerated, dome shaped from 7 ‘ from the permanent structure) with tank more tie-points - Install a ladder to the dome centre from the nearest working platform, install a permanent anchor point at the dome centre, -Install a lifeline anchored to the dome anchor point to work around the dome, with FBH lanyard attached to this lifeline with a fall arrest device Ammonia Storage Tank B Maintenance / repair / painting work - -FBH with 2m long lanyard, Safety at the tank sides Goggles, Hard Hat/, Safety Shoes, safety Refrigerated, dome shaped net (install from 7 ‘ from the permanent tank structure) with more tie-points

Work At height Survey

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- A vertical steel lifeline anchored to the top permanent platform of tank, with Aluminum working saddle (or sky chair) with cable decent control, cable fall arrest mechanism

pipe- Maintenance / repair / painting work Plant of pipeline sections -

All required PPE Man basket lift using crane, FBH lanyard anchored to crane hook (& if possible attached to the near by permanent structure), with an optional retractable cable fall arrestor & vertical life line kept in the man basket, use of qualified rigger, crane operator, tag lines

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Inaccessible sections / other Areas

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Communication Tower

Painting / Repair Work / Cable replacement -

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Urea Conveyor

Maintenance of AC sheet work (replacement of broken sheet, etc.)

Covered with AC sheet roof & sides

Work At height Survey

All required PPE including FBH, etc. Retractable cable fall arrest device attached to vertical lifeline, fixed to the tower top section

-FBH, safety shoes, goggles, Hard Hat, - - Man basket lift using crane, FBH lanyard anchored to crane hook (& if possible attached to the near by permanent structure), with an optional retractable cable fall arrestor & vertical life line kept in the man basket, use of qualified rigger, crane operator, tag lines - As an option, ABCD can consider installing a horizontal life line along the conveyor housing with various anchor points (similar to the recommendation provided for the

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horizontal cable tray section) 12.

Prill Tower C

Painting

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Prill Tower C

Replacement of Aviation Warning Lights -

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Lamp replacements in Repair / Maintenance lights atop towers, other inaccessible plant equipment/ areas, etc.

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Bagging Area / Ware Light fixture House / Other replacements inaccessible locations where lights are installed

repairs

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Naphtha unloading Area

Work At height Survey

All required PPE Fall arrestor device, with a vertical life line, with FBH positioning system

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All required PPE Extend the ladders with caging permanently to facilitate easy reach of lamp fixture, FBH lifeline hooked on to the ladders while lamp replacement / light fixture removal, etc.

lamp -

All required PPE Use ‘U’ end ladders (for better grip) positioned in between belt conveyor streams ABCD may consider re-locating lights to the wall sides for ease of maintenance All required PPE FBH attached to horizontal life line anchored at 5 m interval,

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All required PPE Sky chair with vertical lifeline and retractable cable with fall protector ABCD can also consider use of the hydraulically operated working platform also for this WAH job

Wagon Work atop rail wagon top side for opening of manholes, etc.

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Abbreviations: BIS: Bureau of Indian Standards HSE: Health & Safety executive, UK PPE: Personnel Protective Equipment FBH: Full Body Harness Notes: 1. FBH with double lanyards are supposed to provide the ultimate in WAH protection to workers so long as you

ensure that: o The worker does not remove both lanyard anchor points when he is shifting locations. As an auditor, I have witnessed this unsafe practice being followed by some scaffolders when they have to climb up / down tall scaffold structures; and o Beware of ‘Pendulum effect’ (swinging and hitting nearby structure) and ‘Bottoming Out’ effect (hitting the ground when the FBH is anchored at a short distance from ground).

Work At height Survey

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