PE镀锌方管产品线扩展DN315至DN710规格拖拉管生产上线
PE管施工安装注意事项
一、管槽开挖
PE管的管槽宜直线开挖，沟底开挖宽度为DN0.30m。管道地下连接时，接口处的槽底宽度应适当增加，管道的槽底宽度不应小于DN0.50m，以便安装和对接。
管道顶部的覆盖深度应满足以下要求：
(1) 埋在巷道下，不应小于0.80米。
(2) 埋在人行道下，不应小于0.60米。
当穿越巷道达不到设计深度时，应铺设钢套管进行保护。
管道沟槽需要转弯时，转弯角度不宜过大，弯曲半径应符合以下要求：PE管路的允许弯曲半径为D503030D；50D16050D；160D25075D；250100D。
人工开挖管沟时，要求沟底光滑密实，无尖锐物。沟底可能有起伏，但需支撑平稳，如有凹陷需回填夯实。
二、 pipe connections
PE pipes employ heat fusion and electric fusion connections, with heat fusion including socket connections and butt-welded connections, and electric fusion including socket welds and lap-joint flanges; the company primarily adopts heat-fusion butt-welding for construction.
The main steps for this process are:
1., prepare materials: Place the pipes or fittings on a platform or against an adapter, leaving a 10-20mm allowance.
2., tighten: Select appropriate slide clamps to secure the pipes in preparation for cutting.
3., cut off any impurities or oxidation from the ends of the welded pipe segments and fittings.
4., align the two mating surfaces of adjacent pipe segments so that they meet at their centerlines with minimal offset (<10% of wall thickness), as excessive offsets can impair connection quality.
5., apply heat to achieve temperatures between 210-230°C; winter/summer add-on board heating times differ; ensure both ends melt about 1-2mm during assembly.
6., remove heating plates while keeping contact between melted surfaces under pressure until they cool down completely, ensuring high-quality joints by minimizing cooling periods.
7., complete welding after allowing joint edges to solidify without generating residual stress or distortion.
8., maintain steady pressure during cooling until it reaches room temperature.
三、Installation Construction
1.. Check if trenches comply with installation requirements before installing PE pipes, inspecting them for sagging, cracks, wear marks or scratches; replace defective ones promptly.
2.. Set concrete footings using C20 concrete at bends (elbows), tees (T-connectors), reducers (reducers), check valves (valves) & ball valves when necessary; use brick-laid footings for gate valves & globe valves instead of concrete bridges due to their smaller size compared to other types like butterfly valve etc..
3.. Use steel-plastic transition adapters when connecting metal tubes & devices such as actuators alongside PE piping systems because this will improve resistance against corrosion over time without compromising its flexibility within these complex networks while also reducing costs associated with maintenance work later down line where more frequent repairs may be required based upon expected lifespan calculations made earlier during initial planning stages prior starting up full scale operations fully operational once completed successfully following all safety guidelines strictly adhered too throughout entire duration project being carried out professionally done job well done!
