装修中，常听工人说4分管、6分管，自己却不知道是什么意思？其实这指的是管子的外径，4分管外径20mm，6分管外径25mm。选择哪种管，pvc管业生产，要看水管的外径来决定。管4分管，只能使用4分管。管是6分管，使用6分管、4分管都可以。另外，水管上也会标注20*2.8、25*4.2，pvc管业品牌，前面的20、25就是指管子外径，而后面的2.8、4.2则指水管的壁厚。一般管壁越厚，水管就越---。 parameters of ppr tube decoration，潼南pvc管业， often listen to workers say 4 in charge， 6 in charge， but do not know what it means? in fact， this refers to the outer diameter of the pipe. the outer diameter of 4 branch pipes is 20 mm，&that of 6 branch pipes is 25 mm. which kind of pipe to choose depends on the outer diameter of the pipe. only four branches can be used. the management is divided into 6 branches. it is ok to use 6 branches/4 branches. in addition， 20 * 2.8&25 * 4.2 will also be marked on the water pipe. the front 20&25 refer to the outer diameter of the pipe， while the back 2.8&4.2 refer to the wall thickness of the water pipe. generally， the thicker the pipe wall is， the more durable the water pipe is.
ppr管施工后须经试压验收后方能封管和使用。ppr管安装主要采用热熔管件，熔接时间和压力不好掌握，工艺随机性较大，在热熔推接过程中易产生堆料从而减小通径，并使熔接处成为不规则的缺陷区，产生应力集中，影响ppr管价格的长期性能；对于ppr管的电熔连接，由于电熔丝主要采用促进ppr降解的铜，会加速ppr管的老化。
ppr pipe can be sealed&used only after pressure test&acceptance.the ppr pipe is mainly installed with hot-melt pipe fittings. the welding time&pressure are not well mastered，pvc管业咨询，&the process is random. in the process of hot melt push welding， it is easy to generate stacking materials to reduce the diameter，&make the fusion joint become an irregular defect area， which produces stress concentration， which affects the long-term energy of price of ppr pipe; for the electric melting connection of ppr pipe， the aging of ppr pipe will be accelerated because copper is mainly used to promote the degradation of ppr.
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