​Some tips on PPR water pipes

How to express the specifications of PPR water pipe fittings

The nominal outer diameter dn of PPR water pipe fittings refers to the nominal outer diameter of the PPR water pipe connected to the water pipe. There is a requirement for the key wall thickness of PPR water pipes, which requires that it should not be less than the wall thickness of the same PPR water pipe series S pipe. In other words, the wall thickness of the pipe fitting must be greater than or equal to the wall thickness of the pipe.

A standard for pressure bearing of PPR water pipes

PPR water pipe specifications S5 series, the pressure it can withstand is 1.25M Pa; the pressure value of the S4 series is 1.6M Pa; the maximum pressure that the S3.2 series can withstand is 2.0M Pa; the S2 series pipes can withstand The maximum pressure is 2.5Mpa.

From the pressure value of the pipe, you can also see that the S2 series has the largest pressure value; the S5 series is the smallest, so the S2 PPR water pipe is the best.

A standard corresponding value for the connection between PPR water pipes and steel pipes

There are two main ways to connect PPR water pipes to steel pipes, one is threaded connection, and the other is flange connection. Threaded connections are commonly used in households, and flange connections are not used.

When connecting dn20 PPR water pipes to steel pipes, use four-point threads or flanges; when connecting dn25 PPR water pipes to steel pipes, use six-point threads or flanges; when connecting dn32 PPR water pipes to steel pipes, use Use one-inch threads or flanges; use 1 1/2-inch threads or flanges when connecting dn40 PPR water pipes to steel pipes; use 1 3/4-inch threads when connecting dn50 PPR water pipes to steel pipes. Or a flange; when connecting the dn63 PPR water pipe to the steel pipe, use a 2-inch thread or flange.