推荐回答（1个）
ppr水管热熔首先要注意熔接部位的清洁，不可以有杂物或水迹；另外，插入方向要正，并且是慢慢插入。
熔接时间的长短一般是安装工根据经验控制，跟两个因素有关：
1、管材及配件的规格，规格越大，熔接时间越长；
2、环境温度，冬季时间长，夏季时间短。
以环境温度20度为例（熔接器温度260度）
大概时间是如下：分别是
规格 加热时间 插入时间 冷却时间
20 5s 4s 2s
25 7s 4s 2s
32 8s 6s 4s
40 12s 6s 4s
50 18s 6s 4s
63 24s 8s 6s
75 30s 8s 6s
90 40s 8s 6s
110 50s 10s 8s
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