Requirements for external factors when operating steel mesh composite pipes

The connection of steel wire mesh composite pipes, whether welding or any other connection method, requires professionals to operate it, because we ordinary people do not have the ability to perform these tasks, so for construction workers, steel wire mesh composite pipes need to be operated by professionals. What are the general things we need to pay attention to when operating the tube?
At present, there is no specialized competent department to carry out the construction skills assessment and management of steel mesh composite pipes, and the regulations in various places are inconsistent. Pipeline manufacturers usually provide construction personnel training and assessment, and issue operation certificates to qualified personnel. When the competent authorities formulate requirements, they should be implemented in accordance with the corresponding regulations.
, Check material specifications, quantity and quality in advance to ensure project quality and progress.
Ensure the basic conditions for welding operations.
The welding quality will be seriously reduced due to welding surface contamination. Surface contamination includes any foreign matter such as dust, muddy water, oil, etc. At the same time, the oxide layer of the material itself is not conducive to the fusion of the welding surface, so it is required to remove the oxide layer before welding. If the pipeline is not welded for a long time after assembly, the treated surface will be oxidized again. Generally, when welding cannot be done in time, when the interval exceeds an hour or the melting zone is contaminated, the electrofusion should be withdrawn and processed again.
. The fitting sizes (fitting gaps) of pipes and fittings from different manufacturers are different, and the resistance value and welding area of the fusion sleeve are also different. Therefore, there is no universal welding process. Welding should be carried out according to the process document requirements provided by the manufacturer. .
When the ambient temperature is too low, the temperature of the material body will also be correspondingly low. If appropriate insulation or preheating measures are not taken, the welding quality may be affected. The surface temperature of black pipes can reach '. When the ambient temperature is too high, or when the solar radiation is strong, the basic temperature of the product is very high, and during the welding process, the electrofusion joint will cause obvious temperature unevenness on both sides due to exposure to the sun, resulting in over-welding or one-side flashing, so it should be Take measures such as shading or adjusting the welding process.
Strong winds can easily cause contamination of the welding area and cause air convection in the pipeline, causing the joints to cool too quickly. Contamination of the welding zone affects the welding quality. Cooling too fast may cause false welding or poor plasticity of the welded joint.
The fixed port refers to the situation where the pipeline is constructed from both ends to the middle, or when the end of the pipeline is connected to a fixed device, the length of the pipe section to be connected between the two pipelines is strictly limited. Choosing welding at a lower temperature can reduce the tensile stress caused by temperature rise.
Clean the pipes at any time to facilitate later cleaning or pressure testing.
The purpose of segmented backfilling before pressure testing of buried pipelines is to provide reliable fixation to ensure test safety, safe backfilling depth and inspection positions that should be reserved.
Therefore, not only do we need to pay attention to ourselves, but also the external environment has an impact on our work when operating steel mesh composite pipes. There are many places that require our attention during special construction, but this is also for Make sure we get the job done successfully.