Fluid tube for sealing test in the BOP chamber. The test tube (1) used in the BOP chamber (C) resistance test step has its hollow structure filled internally and totally through a fluid (F) input (4). Thereby, wrapped by closing the drawers (G), after injection in the test fluid chamber (C), due to the filling fluid volume (F) internally and resulting air exhaustion into the hollow structure, the zest tube obtains a supplementary structure resistance against the pressure applied within the chamber (C), preventing unwanted distortions. The tube obtains an effective sealing due to the filling fluid volume (F) that exhausts the air within it, stopped internally with the couplings of the screwed pin (3) threads and the female thread (R) of the plug (TA) or test plug, preventing the test fluid into the chamber (C) to leak and enter its hollow structure. Therefore, the supplementary structure anti-distortion system, air absence inside the tube and test tube stoppage system avoid false pressure relieve into the chamber (C) to the sensors distributed therein, not detecting false leakages, making the BOP resistance analysis against potential oil/gas leakages precise during the probing procedure.

A tool is provided for closing and sealing the open end of a pipe in connection with hydraulic pressure testing. The tool is inserted into the pipe lumen and can be operated from outside. It comprises inner and outer, opposed circumferential clamps; a front plate braced against the pipe end face; a movable back plate internal of the pipe lumen; and an O-ring, carried by the back plate, which can be squeezed by pressing the back plate against the inner clamp. Ports extend through the back plate to the upper and lower ends of its peripheral surface, for bottom filling and top venting of the pipe lumen.

A gripper for a test or isolation plug is provided. The gripper includes at least one gripper segment having a pipe or tube confronting surface with a plurality of separate rows of gripper teeth longitudinally-spaced apart on the surface. Each of the separate rows of gripper teeth comprising an alternating array of individual tips and gaps such that each row is serrated along its length.

A pneumatic test plug for clean-out tees and a method of testing a pipeline are disclosed. The pneumatic test plug includes a cap and a bladder. The cap has an inflation inlet and a testing fluid inlet. The testing fluid inlet provides a conduit for a testing fluid. The testing fluid may be a liquid or a gas. The bladder is in fluid connection with the inflation inlet. The bladder has an open end and a closed end. The open end receives air from the inflation inlet. The closed end is opposite the open end. The testing fluid inlet provides testing fluid through the cap and outside of the bladder. The inflation inlet provides a passageway to the bladder.

A test plug for insertion into and plugging of an open end of an elbow pipe is provided. The test plug includes a resilient sealing element and set of gripper segments carried on a shaft. The set of gripper segments are movable relative to the shaft between pipe-gripping and pipe-non-gripping positions such that, when the test plug is placed in sealing and gripping engagement relative to an inner diameter wall of an elbow pipe, the set of gripper segments are positioned in eccentric relation to at least one of the sealing element and the shaft

A leak test apparatus that tests for a leak in a workpiece includes a plate; a seal that is able to move relative to the plate and is supported by the plate; a driving portion that supports the plate and moves the plate; and a pressure chamber that is surrounded by the plate and the seal. The seal is formed in a shape that enables the pressure chamber to be communicated with an outside.

A clamp assembly for selectively blocking flow while clearing and leak testing a fuel line of a gas turbine fuel supply system is provided. The clamp assembly includes a clamp body configured to surround a flanged joint of the fuel line. A seal is rotatably held between the clamp body portions and includes a hollow ear in fluid communication with a center hole of the seal. The seal includes a tab or pin with which the seal can be rotated between a sealed position and an unsealed position. In the unsealed position, the hollow ear is aligned with the vent, and in the sealed position, the hollow ear is blocked by internal surfaces of the clamp body. Embodiments include a locking assembly allowing the seal to be locked in one and/or both of the open and closed positions.

A fitting assembly includes a fitting comprising a housing and a connector assembly arranged within the housing. The connector assembly comprising a hollow interior and configured to be movable between an unactuated position and an actuated position. In the actuated position, the connector assembly is connectable to a pipe receivable within the hollow interior. An adapter coupled to the fitting includes a biasing mechanism configured to bias the connector assembly from the actuated position to the unactuated position.

A low-marking gripper for a hydrostatic test or isolation plug is provided. The gripper includes at least one gripper segment having a pipe or tube confronting surface with a plurality of separate rows of gripper teeth longitudinally-spaced apart on the surface. Each of the separate rows of gripper teeth comprising an alternating array of individual tips and gaps such that each row is serrated along its length. Each of the teeth has a height of 0.005 inch or less and a tip having an upper surface with an area of less than 0.0002 inch.sup.2. The gripper segment includes at least one longitudinal-extending slot extending therethrough to provide flexibility.

A plug for isolating and pressure testing a hollow piece of equipment (e.g., a container or tubular) comprises a compression nut, a semi-conical mandrel shaft (which may be one or two pieces), and a compression member. The compression nut and the semi-conical mandrel shaft are threaded together, directly or indirectly via a spacer and plug body, such that the rotation of the compression nut forces the mandrel shaft through the compression member, and the semi-conical surface expands the compression member against an interior surface of the hollow piece of equipment to anchor in place and seal off a testing space. Internal channels running through the compression nut (and if present, the plug body) permit externally pressurized fluid and sensors to communicate with the testing space. The compression member can be configured to test either one end of the piece of hollow equipment or a particular region between the two seals.