Abstract: A break-away coupling for incorporation in a hoseline or pipeline, comprises a pair of tubular coupling members each being arranged at its one end for connection to a length of hoseline and provided at its other end with a face to be held in sealing engagement with a complementary face of the other member by frangible connectors. Each connector has one end length of spatulate shape and formed with a through opening to receive a shear pin, a screwed length at the other end to receive a nut, and an intermediate length of reduced section. Valve members in the coupling members are held in open positions against the action of springs until the coupling members are separated on breaking of the connectors; thereupon, the valve members close under spring action. A bleed passageway may be provided to prevent build-up of pressure between the complementary faces, and provide a seal testing facility.

Abstract: A method and system for tank overfill prevention comprising the steps of supplying fluid to the interior of the tank by means of a dispenser, measuring the dispenser pressure P.sub.d and flow rate Q, determining at equal time increments .delta.t a number of quantities representing tank pressures, another quantity representing the rate of increase of tank pressure with respect to time, comparing the quantity thus obtained with a present critical value, and shutting off the fluid supply, if this said quantity exceeds the said preset critical value and if the said flow rate Q is less than a preset critical value.

Abstract: Apparatus for treating a surface comprising a first frame adapted to be moved across the surface to be treated, a sliding frame mounted on and adapted to slide relatively to the first frame in a direction perpendicular to the surface to be treated, an adjustable frame mounted on and adapted to be adjusted relatively to the sliding frame in a direction perpendicular to the surface to be treated, a tool carrier mounted on the adjustable frame and means for maintaining the sliding frame at substantially a predetermined distance from the surface to be treated.

Abstract: Apparatus for spraying plastic insulating material on the inner surfaces of the inner hull of a tanker for transporting liquefied gas, e.g. LNG, LPG, etc. The apparatus comprises a vertical column adapted to be mounted in a tank, hinged extendible arm rotatable around and up and down on the column, a carriage carried on the free end of the arm, and spraying apparatus on the carriage.