Precautions for cold bending of Laoshan brand PVC electrical casing

The core of winter construction for JRPP (reinforced polypropylene) pipes lies in avoiding low-temperature brittleness, ensuring fusion quality, and implementing effective anti-freezing and protective measures. Below are the key considerations by phase, balancing material properties and construction standards. 1. Pre-construction Preparation Material Storage and Preprocessing Pipes and fittings should be stored in warehouses or simple sheds, avoiding exposure to freezing temperatures and direct sunlight outdoors. The stacking height should be ≤1.5m to prevent deformation from heavy pressure. Do not throw, drop, roll, or drag during handling to avoid hidden damage. If there is a significant temperature difference between the site and the storage location, place the pipes and fittings at the site for more than 24 hours before installation to allow their temperature to approach the construction environment, thereby reducing potential connection hazards caused by thermal expansion and contraction. Before construction, inspect each pipe individually and remove those with stress-induced whitening, scratches, or internal wall damage to eliminate hidden defects. Environmental and Personnel Control When the ambient temperature falls below 5°C, warming and insulation measures (such as building insulated sheds or using air heaters) must be taken. Below 0°C, outdoor construction should be minimized, and operations must be suspended during rainy, snowy, or windy weather to prevent joint moisture or brittle cracking of pipes. Construction personnel must undergo specialized training to become familiar with the adjustment of hot-melt/electric-melt parameters and emergency handling procedures at low temperatures. Preparation of Tools and Auxiliary Materials Inspect specialized tools such as hot melt/electric melt welders and cutting machines to ensure they are functioning properly. Prepare auxiliary materials including anhydrous ethanol, fine sandpaper, insulation materials, and sand. Prepare windproof, rainproof, and thermal insulation facilities, such as thermal blankets and tarps, to avoid interference from environmental factors during the welding process. II. Construction Process Control

In various fields such as building plumbing, municipal construction, and agricultural drainage, the quality of pipelines directly impacts usage safety and long-term benefits. Qingdao Laoshan Pipe Industry, as a leading enterprise specializing in plastic pipelines, upholds the core promise of "Laoshan Pipes for Peace of Mind." Through technological innovation, stringent quality control, and comprehensive services, it has become a trusted choice for countless users.A diversified product matrix, catering to all scenariosQingdao Laoshan Pipe Industry has established a comprehensive product system covering five major categories, including PVC, PP-R, PE, HDPE, and PE-RT, with over ten series. Whether for cold and hot water supply in construction projects, sewage treatment in municipal projects, or applications in communication power transmission, gas delivery, and agricultural drainage, suitable high-quality pipeline solutions are available. The PP-R pipes are co-extruded with high-tech nano-antibacterial materials, achieving an antibacterial rate of over 99%, with hygiene standards fully compliant with national regulations, making them directly suitable for purified water delivery systems. PVC pipes, leveraging advantages such as lightweight, corrosion resistance, and low flow resistance, have become the preferred material for municipal and construction projects, with all product types capable of meeting long-term usage requirements across various scenarios.

The 2025 Fourth Quarter "Pioneer Housing Construction · Party Branch Roundtable" meeting of the Building Materials Department Party Branch was successfully held in the second-floor conference room of Qingdao Laoshan Pipeline Technology Co., Ltd. This meeting was organized by the Party Branch of the Building Materials Department at the Qingdao Construction Engineering Management Service Center. Relevant leaders and staff from the Municipal Construction Management Center, representatives from local communities, and the head of Qingdao Laoshan Pipe Industry Technology Co., Ltd. gathered together. Guided by Party building, they engaged in in-depth discussions and exchanges on key topics such as the supervision of the building materials industry, the optimization of the business environment, and the application of high-quality building materials, aiming to foster consensus for development.