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.
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 JOB ON TANK TOP
By fitting the Portable Gauging Device on the Vapor Locks, gauging operation can be done easily.
View of assembling with Sonic Tape and fitting on Tank Gauging Station (Vapor Locks) Model. C-50