A testing device for fixing-load verification is configured such that a coupler (2) having, formed so as to protrude therefrom, a contact part (251/252) that comes into contact with a fixing surface is fixed at a rod-like torque detection unit of a rod-like torque wrench main body (1) and a means (3) for engaging with a fixing bolt (B) is fixed to a side part of the coupler. A side tip part of the engagement means (3) has an open and recessed part (30) for accommodating the fixing bolt (B) from the side, and a protruding part of the fixing bolt (B) is accommodated inside this open and recessed part (30) and the fixing bolt is locked by the deepest part of the open and recessed part (30) or the vicinity thereof. Thus, the testing device for fixing-load verification can be attached to a fixing bolt under test using a simple procedure even when work is being carried out with limited work space. As a result, inspection efficiency is enhanced through simple measurement and a certain degree of measurement accuracy can be ensured.

Method of testing a gas shut-down valve for a combustion engine, by which method the valve is placed in a chamber of a holder 1 and the valve in closed condition is influenced by a non-burnable test gas under pressure to check whether the valve seat and the sealing ring 6 of the valve are close. Further the opening and closing functions of the valve are to be checked.

A pressure lock for a gas system with a regulator, the pressure lock comprises a pressure lock body to be fluidically connected in said gas system, whereby gas can pass from a chamber in the body via lock connection means to the gas system and activation means for delivering gas from said pressure lock body and into the gas system thereby providing a lock-up pressure, whereby the gas from said pressure lock body provides an increased pressure in the gas system, whereby the regulator is blocked for a short period of time thus allowing the detection of leaks in the gas system downstream of the regulator.

A pressure lock for a gas system with a regulator, the pressure lock comprises a pressure lock body to be fluidically connected in said gas system, whereby gas can pass from a chamber in the body via lock connection means to the gas system and activation means for delivering gas from said pressure lock body and into the gas system thereby providing a lock-up pressure, whereby the gas from said pressure lock body provides an increased pressure in the gas system, whereby the regulator is blocked for a short period of time thus allowing the detection of leaks in the gas system downstream of the regulator.

A coupling is disclosed for making subsea connections that mates with an interlocking coupling. The surface of the end of the coupling that mates with the interlocking coupling includes a recess and a groove. A primary seal is provided for fitting into the recess and a metal seal is provided for fitting into the groove. The coupling body includes a primary test port passage between the space external to the coupling and a location along the surface adjacent the recess, and a secondary test port passage between the space external to the coupling and a location along the surface radially between the recess and the groove. A method for installing a subsea pipeline or riser system is disclosed that utilizes the coupling and the interlocking coupling. The method allows for the elimination of the conventional practice of flooding, hydrotesting and dewatering.