An internal line-up clamp (20), for aligning two pipes to be welded together, includes a hi-lo measurement system, for example includes a laser source (24) and camera system (22), mounted on the internal line-up clamp (20) and arranged to make a hi-lo measurement (d), indicative of the degree of alignment of the pipes (10a, 10b). The measurement may be made when two pipes are clamped together by means the internal line-up clamp (20). The pipes may then be welded together, whilst the pipes remain clamped together in the same position, and whilst the hi-lo measurement system remains inside the pipes.

The present disclosure discloses a light-transmittance device and a use method, and belongs to the technical field of manufacturing of rotary equipment. The light-transmittance device includes cylinder sections, a two-column vertical lathe, and a vertical lathe platform; T-shaped supporting fixtures are arranged inside the cylinder sections; light-transmittance tools are arranged at center positions of the cylinder sections; two ends of the cylinder sections are provided with rolling ring base plates which are paired and mounted with the cylinder sections; a roller frame is arranged on a lower side of each group of cylinder section; furthermore, the rolling frames are slidably connected with a rigid rail; a theodolite is arranged on one side close to the cylinder sections; and a triangular bracket and a light-transmittance platform are arranged on a lower side of a shell of the theodolite.

A processing device is configured for use within a storage container with an interior surface. The processing device can include a chassis with one or more support assemblies. The chassis can support one or more motive assemblies, which can be configured to engage the interior surface for movement of the chassis relative to the interior surface. The one or more support assemblies can be configured to support one or more tools, with the one or more tools being configured to execute one or more processes on the interior surface when the processing device is within the storage container.

The invention relates to a pipeline internal centering device for centering a first pipe (28) relative to a second pipe (30), having a centering unit (12) for aligning the second pipe (30) relative to the first pipe (28), and having a transport device (14) for moving along a longitudinal axis (L) of the pipeline internal centering device (10). According to the invention, a rotary device (48) is provided by means of which the pipeline internal centering device (10) can be rotated about its longitudinal axis (L).

Present invention relates to a rotary positioner that allows a welding table's work surface to be set at an angle as desired by a user. Two vertical frames can move and slide along the length of a chassis-bar to adjust the distance between the two vertical frames. As long as the length of a welding table does not exceed the total greatest distance between the two vertical frames, the present invention can fit any work table or welding table. Caster wheels and height adjustment knobs allow for easy movement and balancing of the rotary positioner.

Internal clamping of a weld-neck fitting to a pipe in preparation for precision tack welding of the fitting to the pipe is established by a pair of alignment and clamping wedge members, each having alignment and gripping members and angulated reaction surfaces which are positioned within the pipe and weld-neck fitting with the angulated reaction surfaces in relatively moveable engagement. One of the alignment and clamping wedge members is moved linearly, causing the angulated reaction surfaces to translate the linear movement to lateral movement, forcing the alignment and gripping members laterally against the internal surfaces of the pipe and fitting and supporting the fitting in precision aligned relation with the pipe to facilitate tack welding. A gauge member confirms precision alignment of the fitting with the pipe before and after applying the tack welds, then the alignment and clamping apparatus is loosened by opposite linear movement of the wedge members which are removed to permit final weld connection of the fitting to the pipe.

A method and device for location of pipes is disclosed. The method can comprise mounting one or more centering tools, each having a reflector to a first pipe such that the reflectors are either aligned with, or can be used to determine the location of the center of the first pipe and mounting one or more centering tools, each having a reflector to a second pipe such that the reflectors are either aligned with, or can be used to determine the location of the center of the second pipe. The method can further comprise determining a first distance between the center of the first pipe and a light emitting source at an observation point disposed between the first pipe and the second pipe and determining a second distance between the center of the second pipe and the light emitting source at the observation point.

A pipe crawling welding device including a crawler module having a propulsion unit configured to controllably drive the device longitudinally through a pipe. The device may further include a welding module that is rotatably coupled to the crawler module and has a welding head mounted thereon, wherein the welding module automatically rotates in an opposite direction and at a same rotational speed relative to a direction and rotational speed of the crawler module to maintain an angular position of the welding head.

A pipe crawling welding device including a welding module having a welding head thereon, a mounting shaft, a crawler module and a boom is disclosed. The boom may be fixedly coupled to the mounting shaft. The crawler module may be rotationally coupled to the mounting shaft via, for example, first and second ring bearings so that the crawler module may rotate with respect to the mounting shaft. The welding module may be fixedly coupled to the mounting shaft so that in use, the welding module, boom and mounting shaft may rotate in an opposite direction and at a same rotational speed relative to a direction and rotational speed of the crawler module to maintain an angular position of the welding head.

An internal line-up clamp for welding pipe lengths end-to-end includes a clamp ring made up of a plurality of clamp ring elements that are angularly distributed around the circumference of the clamp ring. The clamp ring elements are divided into mutually opposed groups that are interdigitated such that the clamp ring elements alternate from one group to the other around the circumference of the clamp ring. A longitudinally-acting actuator system drives relative longitudinal movement of the groups to effect clamping expansion of the clamp ring by wedging interaction between the circumferentially-alternating clamp ring elements of the groups. By expanding the clamp ring in alignment with a weld plane between the abutting ends, the same clamp ring may be used to align the pipe lengths and to back a weld between them.