BE USED WITH PORTABLE GAS DETECTOR TO AVOID INERT GAS LEAKAGE DURING GAS DETECTION, TO SATISFY THE REQUIREMNT ABOVE (SOLOAS REGULATION 62-17) "SUITABLE ARRANGEMENT FOR MEASURING THE ATMOSPHERE INSIDE THE TANK USING PORTABLE INSTRUMENTS."
SPECIFICATION FOR THE DESIGN, OPERATION, AND CONTROL OF C.O.W. SYSTEM [RESOLUTION A.446(XI), 6.6(b)], STATES "THE PRESSURE OF THE ATMOSPHERE AT THE TANKS IS NO LONGER POSITIVE; THEN THE WASHING MUST BE STOPPED UNTIL SATISFACTORY CONDITIONS ARE RESTORED."
OPERATION FOR C.O.W. SYSTEM CAN BE JUDGED TO WATCH INERT GAS PRESSURE ON EACH TANK BY FITTING OF THE PORTABLE PRESSURE METER ON MMC TANK GAUGING STATION (VAPOR LOCKS).
PURPOSE OF TANK GAUGING STATION (VAPOR LOCKS):
PREVENTION OF DANGEROUS GAS LEAKAGE DURING GAUGING
* MINIMIZATION OF ERROR AND DIFFICULTY IN GAUGING JOB DUE TO DANGEROUS GAS PRESSURE.
* PROTECTION OF HEALTH FOR GAUGER FROM DANGEROUS GAS.
DETERMINATION OF HEIGHT FOR ULLAGE READ-OUT POINT
* ULLAGE GAUGING RESULT CAN BE INSURED BY INSTALLING TANK GAUGING STATION (VAPOR CONTROL VALVE) ON TANK TOP TO THE HEIGHT WHERE ULLAGE READ-OUT POINT OF PORTABLE GAUGING DEVICE COINCIDES WITH ULLAGE ZERO LEVEL ON CARGO TABLE.
GROUNDING (EARTHING) OF THE GAUGING DEVICE
* PORTABLE GAUGING DEVICE IS GROUNDED (EARTHED) BY FITTING ON THE TANK GAUGING STATION SO STATIC ELECTRICITY IS DRAINED.
EASINESS OF GAUGING JOB ON TANK TOP
* BY FITTING THE PORTABLE GAUGING DEVICE ON THE TANK GAUGING STATION, GAUGING OPERATION CAN BE DONE EASILY BY ONE HAND ONLY. ALSO DROPPING/DAMAGE OF DEVICE CAN BE PREVENTED.
RELATIVE RULES FOR TANK GAUGING STATION (VAPOR LOCKS):
IMO MARPOL 1973/78 ANNEX I, REGULATION 13B(3) AND SOLAS REGULATION 60, PARAGRAPH 7
[REQUIREMENT OF CLOSED ULLAGE SYSTEM]
IMO MARPOL 1973/78 ANNEX I, REGULATION 13B(3) AND SOLAS REGULATION 62, PARAGRAPH 17
[REQUIREMENT OF SUITABLE ARRANGEMENT ON EACH CARGO TANK FOR THE USE OF PORTABLE INSTRUMENT]
CLASS NK RULES FOR THE SURVEY AND CONSTRUCTION OF STEEL VESSEL, PART D14.2.8 (GAUGING DEVICE FOR CARGO TANKS) AND PART S13.1.1 (TYPE OF GAUGING DEVICE)
[REQUIREMENT OF SELF-CLOSING VALVE ON TOP OF TANK GAUGING HOLE]
ISGOTT 7.2, MEASURING AND SAMPLING
[7.2.1 GENERAL, CLOSED GAUGING AND SAMPLING BY USING PORTABLE EQUIPMENT]
THE ABOVE EXPLANATION IS MADE BRIEFLY IN ACCORDANCE WITH OUR OWN RESEARCH. SO IT IS ESSENTIAL FOR USER TO INVESTIGATE THE INTERNATIONAL RULES AND REGULATIONS INVOLVED, IT MAY BE CHANGED OCCASIONALLY.
