Van đo danh giới dầu nước kín khí
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Van đo danh giới dầu nước kín khí

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GENERAL

The gauging job on deck of tank ship for "ULLAGE", "TEMPERATURE", "OIL-WATER INTERFACE", "TANK BOTTOM DRYNESS CHECKING", "OXYGEN CONTENTS" and” CARGO LIQUID SAMPLING" by Portable Device satisfies the following requirement and purpose by installing the MMC Vapor Locks [Tank Gauging Station] on tank top in order to prevent leakage of dangerous vapor from tank.

 

Concerned Rule/Regulation

  • 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]

Purpose of VAPOR LOCKS [ Tank Gauging Station ]

MMC Vapor Locks [ Tank Gauging Station ] has been developed by MMC to achieve the following 4 - purposes.

  • PREVENTION OF DANGEROUS GAS LEAKAGE DURING GAUGING - Protection of health for gauger from dangerous vapor, and to avoid difficulty in gauging works due to pressure of dangerous vapor.
  • DETERMINATION IN HEIGHT OF ULLAGE READ-OUT POINT - Volume of Cargo Liquid in tank can easily be known accurately with the Ullage Table that the read-out point of the Portable Gauging Device coincides with the Ullage Zero Height on tank top by installing MMC Vapor Locks.
  • GROUNDING (EARTHING) FOR THE GAUGING DEVICE - By fitting the Portable Gauging Device on the Vapor Locks, Static Electricity can be drained.
  • EASINESS OF GAUGING JOBON TANK TOP - By fitting the Portable Gauging Device on the Vapor Locks, gauging operation can be done easily.
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