Installation specification requirements and installation spacing of natural gas pipeline brackets
After the construction of the engineering structure is completed, the first step in the installation of the system pipeline is the installation of the pipeline support. The installation of the pipeline support has strict specifications.
The construction of the pipeline support must be implemented in strict accordance with the specifications. Pipe support is also called pipe support, pipe part, etc. It is the structure of the pipeline. The following editor will introduce the installation specifications and installation spacing of the pipe support.
Introduction to Pipe Support
Pipe support is a kind of structure used to support pipeline laying on the ground. It is divided into fixed support, sliding support, guide support, rolling support and so on.
Pipe supports are used wherever pipes are laid, and are also called pipe supports, pipe parts, etc. As the supporting structure of the pipeline, the pipe frame is divided into fixed and movable according to the operation performance and layout requirements of the pipeline. The place where the fixed point is set becomes the fixed bracket. This kind of pipe bracket and the pipe bracket cannot have relative displacement. Moreover, the deformation of the fixed pipe bracket after being stressed should be small compared with the deformation value of the pipeline compensator, because the pipe bracket must have Sufficient stiffness. The place where the intermediate support is set adopts the movable pipe rack, and the relative displacement between the pipe and the pipe rack is allowed, and the thermal deformation of the pipe is not restricted.
Installation Specification for Natural Gas Pipeline Bracket
- 1. The location is correct, and the buried should be level and firm.
- 2. The fixed bracket should be in close contact with the pipeline, and the fixed shadow should be firm.
- 3. The sliding support should be flexible, there should be a gap of 3 to 5 mm between the sliding support and the sliding groove, and the longitudinal movement should meet the design requirements.
- 4. The hanger and boom of the non-heat-stretching pipeline should be installed vertically.
- 5. Hangers and booms with thermally elongated pipes should be offset in the opposite direction of thermal expansion.
- 6. The supports and hangers fixed on the building structure shall not affect the safety of the structure.
Installation Specification for Natural Gas Pipeline Bracket: Essentials for Installation of Pipeline Bracket
In addition to buried pipelines, the production and installation of pipeline supports are the first process in pipeline installation. The fixed bracket must be installed strictly in the designated position of the design and firmly combined with the civil structure. When the concrete strength of the fixed bracket does not meet the design requirements, the fixed bracket shall not be fixed with the pipeline, and the well shall be prevented from being damaged by external forces.
When the bracket is installed on the prefabricated concrete pier, the compressive strength of the concrete must meet the design requirements; the allowable deviation of the slide surface of the sliding bracket exposed to the concrete surface is -2mm, the position of the bracket should be correct, the embedment is flat and firm, and the slope meets the design requirements , There shall be no girth welds at the bracket. The allowable deviation of the elevation of the top surface of the support is -5～0mm, and the allowable deviation of the elevation of the steel plate surface of the sliding support of the movable support is -10-0mm. The elevation of the supporting surface of the pipe support can be adjusted by adding metal backing plates on it, but the metal backing plates must not exceed two layers, and the backing plates should be welded to the embedded iron or steel structure.
Pipes with different displacements or different displacement directions shall not share the same boom or slip support when there are no special requirements in the design.
The sliding support plate of the sliding support, the sliding plane of the sliding support and the sliding plane of the guide plate of the guide bracket on the bracket should be flat, smooth, and in good contact, and there should be no skewing and jamming.
The fixed angle plate at the fixed bracket is only allowed to be welded to the pipe, and must not be welded to the fixed bracket structure to prevent the formation of a “dead point”, which limits the expansion and contraction of the pipe and is extremely prone to accidents.
When laying the pipe trench, a support (hanging) frame should be installed 0.5m away from the mouth of the trench. The suspender of the slip and hanger of the pipeline without thermal displacement should be installed perpendicular to the axis of the pipeline; the center of the suspender of the slip and hanger of the pipeline with thermal displacement should be on the opposite side of the pipeline displacement direction, and the displacement should be in accordance with the design requirements For installation, if the design is not required, it should be 1/2 of the calculated displacement. The installation height of the spring support and hanger should be adjusted according to the design requirements. The temporary fixing parts of the spring shall be removed after the pipeline installation, pressure test and heat preservation are completed.
Fixed piers should be set at the breakpoints of directly buried heating pipelines and pipelines that are not allowed to be deformed under the action of external forces according to the designed position and requirements to ensure the stability of the pipeline system. When not required by the design, the quality of the fixed piers should meet the following requirements: the strength grade of the concrete fixed piers should not be lower than C20; the diameter of the steel bars should not be less than 8mm, and the spacing should not be greater than 250mm; the steel bars should be arranged in two layers, and the protective layer should not Less than 30mm; when the pipe passes through the fixed pier, the edge of the hole should be provided with reinforcing ribs.
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