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Polyethylene screw fittings

Published by pahk on

لیست قیمت اتصالات پیچی پلی اتیلن پلی رود - مرجع خرید و فروش انواع تجهیزات  آبیاری ایرانی | تجهیزات آبیاری ایران

Polyethylene screws or polyethylene screws or mechanical polyethylene threads for polyethylene pipes are usually made up of the following five parts: body, screw, splice, bushing, and o-ring.

Considering that the outer diameter of polyethylene pipes with a certain tolerance should be suitable for the diameter of internal threads, and since in hard polyethylene pipes, the wall thickness of pipes made by different factories is not necessarily the same, so if it is intended for connection Pipes use screw connection. This type of connection must be made by the pipe manufacturer to make the connection possible.

Polyethylene screw fittings are used in piping systems to connect pipes or sections of pipe directly to adapt to different sizes (conversions), elbows, tees, etc., or for other purposes such as adjusting or measuring fluid flow. To take.

Produced in different forms and in male and female. These screw connections are made of hard polyethylene and can work at high pressures up to 10 atmospheres. Depending on the type of connection, they are sometimes produced as flanges

Application of screw fittings (mechanical)

Screw fittings are used for all soft polyethylene pipes with an outer diameter of 20 to 125 mm.

This type of connection is widely used in water distribution and agriculture.

Features of polyethylene fittings

  • Resistance to chemicals and rust, fractures and cracks due to pressure or impact, corrosion and abrasion, vibrations caused by earthquakes
  • Polishing and smoothness of external and internal walls (low pressure drop due to internal surface friction)
  • No sedimentation
  • High flexibility
  • Low cost and high speed installation and execution
  • No need for heavy machinery at run time


Specifications of raw materials for polyethylene screw fittings

  • Body: Polypropylene copolymer (grade)
  • Cap: Polypropylene copolymer (grade)
  • Split: polystyrene
  • Bushing: Polyethylene
  • O-ring: Rubber Nitrite (Available on request NBR, EPDM, FPM)
  • Reinforcement rim: Galvanized from size 1 to 4 inches
  • Screws: Galvanized (can be delivered on request stainless steel)
  • Beads: Galvanized (can be delivered on request stainless steel)

Working temperature of polyethylene screw connections

Not all screw fittings and valves are designed to use hot water, so normal temperature should be used in the piping route that uses polyethylene pipes. Can be used in sub-zero temperatures}

Working pressure and quality approvals

Screw joints are produced under the following international standards and the quality of the product is tested in the factory laboratory and under the supervision of the company’s quality control department, which in the first part is part of the approvals of various legal organizations.

Gears

All gears of screw products are designed and manufactured according to the following standards:

ISO-7/1, BS 21 – 1973, DIN 2999, NEN 3258, AS 1722 Part 1 – 1975.

Resistance to chemicals and corrosion

Screw joints are resistant to all chemicals due to the use of standard raw materials and their strength can be increased by using the recommended rubber parts.

Important points of installing parts

Before installing, clean the end of the desired pipes in every way, then install the connection parts on the pipe in order.
Before tightening the nut, make sure that all the parts fit and use a wrench whose handle length is not more than 46 cm. To ensure the sealing of the connection, you can use standard Teflon tape.