| FOM-10.8 |
Fleet Operations Manual FOM Gas Detection Instrument (Parcel Chem Tankers) |
Doc No.: FOM 10.8
Revision: 02 Date: 12 Feb 2026 Issued by: DPA Approved by: MD |
Portable Gas Detection System - For Parcel Tankers
| Quantity | Items |
|---|---|
| Standard Outfit | |
| 6 | Personal Multi Gas Detector (H2S, CO, O2,CO2, LEL) GX-2009A or equivalent |
| 2 | Portable Multi Gas Detector (%LEL, O2, H2S,CO2, CO) capable of measuring in inert atmosphere GX-8000A (Butane unit) or equivalent |
| 2 | Gas detector pump (manually operated bellows pump) that draws a sample through the short-term tubes. |
| 1 | Closed gastight -gas sampling device – Able to fit on MMC / UTI vapor lock port (not for Asphalt) |
| Gas Detector Tubes | |
| 3 Sets (10 tubes per set) |
Benzene (0.1 – 5 ppm) |
| 1 Set (10 tubes per set) |
Mercaptans (0.1 – 8 ppm), Xylene (2-200), Toluene (1-100 ppm) Gas detector tubes should be from same manufacturer as the gas detector pump. |
| 1 set | Styrene Monomer (2-100 ppm) |
-
*Ship can also provide units capable of measuring VOC (PID 0-2,000ppm) in addition to above e.g. Eagle 2 IR unit or GX-6000 IR unit. In case of less than 1 ppm TLV gases, Gastec tubes covering relevant range, should be purchased. These units should be provided only on non- EU registered ships. On EU ships, they should only be supplied in addition to mandatory required units.
- In case of measuring high range of HC Volume for long duration, suggest isolating the CO and VOC sensor. Dummy sensors/blanks can be purchased.
- On receipt of voyage orders, vessel to refer to the IBC code and / or SDS sheet of the cargo to confirm the toxicity nature of the cargo to be carried and appropriately, extra toxic gas detector tubes are to be requisitioned. Ship can order additional tubes if required due to special requirement of a cargo or charterer.
- In case any aromatic hydrocarbons or products containing them (in excess of 1% by volume) are carried, vapour detection tubes for such products should be on board.
- In case of toxic constituents of Inert Gas, ISGOTT 1.4.11.2 states that:
- The precautions to protect personnel against the toxic components of IG during tank entry are in section ISGOTT 11.1.6.12. However, they do not include requirements for directly measuring the concentration of the trace constituents of flue gas. This is because gas freeing the atmosphere of a cargo tank from a hydrocarbon gas concentration of about 2% by volume to 1% LFL, and until a steady 21% by volume oxygen reading is reached, is enough to dilute these toxic constituents to below their OEL-TWA.
- If the vessel is fitted with a BWTS, then suitable gas detection equipment (For Ozone, Chlorine, Hydrogen etc.) as applicable for the type of BWTS should be provided.
- All above equipment should be calibrated as per marker's instructions including compliance with required intervals.
- Units capable of measuring HC Volume % can be provided in case of operational requirement (eg: CPP trade)
Spares to be Carried
| Quantity | Items |
|---|---|
| 1 set | Long Neoprene Sample Hoses for each unit, (each set must be at least depth of tank + 10ft) – May be reduced if instruments have same connections |
| 2 Boxes | Spare Filters for each unit |
| 2 Sets | Calibration / Span Gases for each type of equipment (must include instructions, certificates and response curves) |
| 1 Sets | Complete 100% spare sensor for personal Multi gas Detector( H2S,CO,CO2,O2,LEL) |
| 1 Sets | Complete 100% spare sensor for Portable Multi gas Detector( H2S,CO,CO2,O2,LEL) |
| 2 Sets | Rechargeable batteries c/w multiple size charger unit (Alkaline batteries) |