目前，法蘭連接中大的問題主要是法蘭本身不合格和法蘭連接不合格。

現(xiàn)在市場(chǎng)上銷售的一些法蘭存在的質(zhì)量問題有：

①法蘭的鋼材不合格，PVC管業(yè)加盟，耐壓強(qiáng)度較低，PVC管業(yè)生產(chǎn)，在使用若干個(gè)月或若干個(gè)年后，出現(xiàn)滲水。

②法蘭的螺栓孔外緣距法蘭的邊緣太小，小于5mm，在螺栓緊固時(shí)，易使法蘭邊緣。

At present， the major problems in flange connection are the unqualified flange itself and the flange connection is unqualified.

Some of the quality problems of the flange sold in the market are as follows:

① The flange steel is unqualified and the pressure resistance is low. After several months or years of use， water seepage occurs.

② The outer edge of bolt hole of flange is too small from the flange edge， less than 5mm. When the bolts are tightened， it is easy to make the flange edge.

在熔管的時(shí)候，先用PPR管剪刀切好ppr管。切割時(shí)要把管子斷面盡量剪平，沒有毛邊和毛刺，管材和管件連接端面必須清潔，干燥、無(wú)污染，否則會(huì)影響熔接效果。并在管材熔接口標(biāo)上熔接深度線。

When melting the pipe，PVC管業(yè)加工， first cut the PPR pipe with PPR pipe scissors. When cutting， the cross-section of the pipe Try to cut it flat without burr and burr. The connecting end face of the pipe and fittings must be clean，麗水PVC管業(yè)， dry and pollution-free， otherwise the welding effect will be affected. And the welding depth line is marked on the pipe welding joint.

ppr管在電氣部分：

衛(wèi)生間的開關(guān)盡量放在室外，若放在室內(nèi)有淋浴的需加裝防濺盒，使用不方便還會(huì)增加成本。

衛(wèi)生間等電位聯(lián)結(jié)線好利用近的柱筋引入（若有均壓環(huán)更好）。

PPR tube in the electrical part:

The switch of toilet should be put outdoors to the full. If it is put indoors with shower， splash proof box should be added， which will increase the cost if it is inconvenient to use.

The equipotential bonding line in the toilet should be introduced by using the bar near the column (if there is a grading ring， it is better).

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