在济南这座四季分明、湿度与温差齐飞的城市，通风管道的耐久性直接关系到空调系统的“寿命”与“健康”。从工厂车间到写字楼，从地下车库到医院手术室，不同场景对管道材料的考验堪称“地狱级”。究竟哪种材料能扛住潮湿、腐蚀、高温的“三重暴击”，成为通风管道界的“常青树”？

　　In Jinan, a city with distinct four seasons and fluctuating humidity and temperature, the durability of ventilation ducts directly affects the "lifespan" and "health" of air conditioning systems. From factory workshops to office buildings, from underground garages to hospital operating rooms, the testing of pipeline materials in different scenarios can be described as' hellish '. Which material can withstand the "triple blow" of moisture, corrosion, and high temperature, and become the "evergreen tree" in the field of ventilation ducts?

　　一、镀锌铁皮管道：传统霸主的“锈蚀困局”

　　1、 Galvanized Iron Pipe: The "Corrosion Dilemma" of Traditional Overlord

　　镀锌铁皮曾是通风管道的“绝对主力”，但如今正面临耐久性挑战。

　　Galvanized iron sheet used to be the "absolute mainstay" of ventilation ducts, but now it is facing durability challenges.

　　优势：

　　Advantages:

　　成本低廉：每平方米价格仅为不锈钢的1/3，初期投入友好；

　　Low cost: The price per square meter is only one-third of stainless steel, and the initial investment is friendly;

　　加工灵活：可现场制作异形件，适合复杂风管布局。

　　Flexible processing: can produce irregular parts on site, suitable for complex duct layouts.

　　短板：

　　Shortcomings:

　　锈蚀风险：济南夏季湿度常超70%，镀锌层在潮湿环境中2-3年即开始锈蚀，穿孔后漏风率飙升；

　　Corrosion risk: The humidity in Jinan often exceeds 70% in summer, and the galvanized layer begins to rust in a humid environment after 2-3 years, with a surge in air leakage rate after perforation;

　　冷凝水困扰：空调管道内外温差大时，铁皮表面易结露，滋生霉菌；

　　Condensing water problem: When there is a large temperature difference between the inside and outside of the air conditioning duct, the surface of the iron sheet is prone to condensation, which can breed mold;

　　噪音问题：铁皮共振明显，需额外包裹隔音棉，增加维护成本。

　　Noise issue: The iron sheet resonates significantly, requiring additional wrapping of soundproof cotton to increase maintenance costs.

　　二、PVC/PP塑料管道：防腐新贵的“温度瓶颈”

　　2、 PVC/PP plastic pipes: the "temperature bottleneck" for anti-corrosion newcomers

　　塑料管道以“耐腐蚀”著称，但在济南却面临“冰火两重天”。

　　Plastic pipes are known for their "corrosion resistance", but in Jinan, they face a "double heaven of ice and fire".

　　优势：

　　Advantages:

　　化学稳定性强：酸碱盐雾环境“面不改色”，适合化工厂、实验室；

　　Strong chemical stability: The surface remains unchanged in acidic, alkaline, and salt spray environments, making it suitable for chemical plants and laboratories;

　　内壁光滑：风阻仅为铁皮的1/3，节能效果显著；

　　Smooth inner wall: The wind resistance is only one-third of that of iron sheet, and the energy-saving effect is significant;

　　安装便捷：承插式连接，工期比铁皮管道缩短40%。

　　Easy installation: Plug and socket connection, with a construction period 40% shorter than iron pipes.

　　短板：

　　Shortcomings:

　　高温变形：连续排烟管道温度超60℃时，PVC管道可能软化变形；

　　High temperature deformation: When the temperature of the continuous exhaust pipe exceeds 60 ℃, the PVC pipe may soften and deform;

　　老化脆化：紫外线照射下，室外管道5年即出现裂纹；

　　Aging and brittleness: Cracks appear in outdoor pipelines after 5 years of exposure to ultraviolet radiation;

　　防火局限：PP材料燃烧时滴落熔融物，需加装阻燃层。

　　Fireproof limitation: When PP material burns, it drips molten material and requires the installation of a flame retardant layer.

　　三、复合材料管道：全能选手的“成本难题”

　　3、 Composite material pipeline: the "cost challenge" for all-around players

　　玻璃钢、酚醛铝箔复合板等材料试图兼顾耐久与性能，但价格成“拦路虎”。

　　Materials such as fiberglass and phenolic aluminum foil composite panels attempt to balance durability and performance, but their prices have become a "roadblock".

　　优势：

　　Advantages:

　　防腐防锈：玻璃钢管道耐酸碱等级达ISO 12944-C5，适合沿海高盐雾环境；

　　Corrosion and rust prevention: The fiberglass pipeline has an acid and alkali resistance rating of ISO 12944-C5, suitable for high salt spray environments along the coast;

　　保温一体：酚醛复合板自带保温层，无需二次包裹，减少冷凝水；

　　Integrated insulation: Phenolic composite board comes with an insulation layer, eliminating the need for secondary wrapping and reducing condensation;

　　A级防火：玻璃钢燃烧性能达GB 8624-2012 B1级，烟毒指数低于铁皮。

　　A-level fire protection: The combustion performance of fiberglass reaches GB 8624-2012 B1 level, and the smoke and toxicity index is lower than that of iron sheet.

　　短板：

　　Shortcomings:

　　价格高昂：每平方米价格是镀锌铁皮的2-3倍，初期投入让中小项目望而却步；

　　High price: The price per square meter is 2-3 times that of galvanized iron sheet, and the initial investment makes small and medium-sized projects hesitant;

　　修复困难：玻璃钢破损需专业设备修补，维护成本高于金属管道；

　　Difficulty in repair: The damaged fiberglass requires professional equipment for repair, and the maintenance cost is higher than that of metal pipelines;

　　尺寸局限：大口径复合管道需定制，运输安装易损坏。

　　Size limitation: Large diameter composite pipelines require customization and are prone to damage during transportation and installation.

　　本文由济南通风管道友情奉献.更多有关的知识请点击:http://www.jntfgd.com真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from Shandong Ventilation Duct For more information, please click: http://www.jntfgd.com Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.