PPR Pipe Fittings For Water

Introduction

PPR pipe fittings are a type of plumbing component made from polypropylene random copolymer (PPR) material. They are widely used in water supply and drainage systems due to their durability, corrosion resistance, and ease of installation.

Common quality problems of PPR pipe fittings include the following aspects:

Inner wall problem

The inner wall of the PPR pipe may be uneven, which may be caused by too high screw temperature or too fast speed during the production of the pipe. In addition, bubbles may also appear on the inner wall, which is usually due to moisture in the raw material.

Appearance problem

Black streaks may appear on the surface of the tube, which may be due to excessive head temperature or the filter is not cleaned. In addition, the surface of the tube may also be dull, possibly because the die temperature is not set properly. The pipe surface wrinkles may be because the temperature around the die is not uniform, the cooling water is too hot or the traction speed is too slow.

Size problem

PPR pipe fittings may have uneven wall thickness problems, which may be due to the mouth die and core die are not aligned, the head temperature is not uniform, the traction is unstable or the compressed air is unstable. In addition, the large longitudinal or transverse shrinkage of the pipe may be due to the large radial difference between the caliper sleeve and the inner diameter of the die (transverse) or the high traction speed (longitudinal).

Mechanical property problem

PPR pipe fittings may be bent, which may be due to uneven pipe wall thickness, uneven temperature around the head, the head cooling tank and the traction cutting center are not aligned, or the holes at both ends of the cooling tank are different centers. In addition, the product may be brittle, which may be due to the body plasticization degree is not enough, the screw speed is too fast, the head temperature is too low or the resin viscosity is too high.

The above are common quality problems of PPR pipe fittings, in order to avoid these problems, it is necessary to strictly control the process parameters during the production process, ensure equipment maintenance and cleaning, and use high-quality raw materials. At the same time, in the installation and use process, it is also necessary to follow the correct installation and use methods to ensure the performance and life of PPR pipe fittings.

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