A comprehensive guide to PE pipes: history, marking, standards, advantages
Polyethylene pipes are used worldwide today — from private water supply pipelines in summer cottages to main gas pipelines. But what kind of pipe is this — PE? What makes it special? And how can you avoid confusing a drinking water pipe with a technical one?
In this article, we will explain simply and clearly:
✦ what a PE pipe is;
✦ where and why it is used;
✦ what types exist;
✦ what the markings mean;
✦ and how to identify a genuine certified product.
A Brief History of the PE Pipe
Polyethylene as a material was first synthesized in 1933 in Great Britain. The first industrial pipes made of polyethylene began to be used in Germany in the late 1950s. They rapidly gained popularity in water supply and sewerage systems due to their resistance to corrosion. In the 1970s, high-density polyethylene (HDPE) replaced earlier grades — and became the foundation for the new generation of pipes we know today: durable, flexible, and long-lasting.
What is a PE Pipe?
A PE pipe is a pipe made of high-density polyethylene (HDPE). It is this form of polyethylene that features a dense molecular structure, which allows the pipe to:
• withstand high pressure (up to 16 atmospheres),
• resist cracking when bent,
• remain stable under freezing temperatures and direct sunlight,
• offer an operational lifespan of over 50 years.
High-density polyethylene, or HDPE, is used precisely because it combines:
• high tensile and puncture strength,
• flexibility,
• chemical inertness (it does not react with water, fertilizers, or gas).
Where are PE Pipes Applied?
Polyethylene pipes are universal. They are used in:
➣ Water supply systems (both potable and technical).
➣ Gas supply networks (according to separate specialized standards).
➣ Irrigation and drainage.
➣ Construction (cable protection ducting).
➣ Technical and temporary systems (on farms, in industrial plants, etc.).
For convenience and safety, the pipes are marked with color stripes.
- ◎ Drinking water (blue stripe) — PE pipes with a light blue or dark blue stripe are used in water supply systems. They are manufactured from safe, certified material suitable for transporting drinking water.
- ◎ Gas (yellow or orange stripe) — pipes with a bright yellow stripe are designed for low- and medium-pressure gas pipelines. They meet strict safety requirements and international standards.
- ◎ Technical pipes (gray or plain black) — used for irrigation, drainage, and cable protection. This is the most versatile option for general technical needs.
This is an international marking system, established in many national standards. It helps prevent mixing up pipes intended for different applications during installation.
Advantages of PE Pipes
Polyethylene pipes have become the standard in many industries for a reason:
• Corrosion resistance. Unlike metal, they do not rust or oxidize.
• Flexibility. They can be installed with a minimum number of joints — which is especially convenient in open fields or agricultural plots.
• Lightweight. Easier to transport and faster to install.
• Chemical inertness. Resistant to many mineral salts, fertilizers, and detergents — though not universal. Restrictions apply to concentrated acids and petroleum products.
• Durability. With proper installation, the operational service life is 50+ years.
• Installation variety. Jointing can be performed both via butt-fusion/electrofusion welding and using compression fittings.
Important: for drinking water, you must use a pipe that complies with established medical safety criteria, verified by the official state sanitary and epidemiological expertise report.
What Do the Markings Mean: PE80, PE100, SDR, PN?
PE80 / PE100
This indicates the grade of polyethylene material. PE100 has a denser molecular structure than PE80, which allows for manufacturing a pipe with the same strength but with a thinner wall — or a pipe with the same wall thickness but significantly higher strength. This translates to weight savings, smaller weld bead sizes, and higher pressure capacity — resulting in a more efficient engineering solution.
SDR (Standard Dimension Ratio)
The ratio of the pipe’s outer diameter to its wall thickness. The lower the SDR value, the thicker the pipe wall and the stronger the pipe.
For example:
SDR17 — standard for water supply distribution,
SDR11 — for high pressure (gas pipelines or heavy-duty technical systems).
PN (Nominal Pressure)
PN (Pressure Nominal) on a polyethylene pipe indicates its nominal pressure rating. This is the key performance metric indicating the maximum constant pressure in bars that the pipe can safely withstand throughout its long term of operation at a working medium temperature of +20°C.
Why is this indicator considered “nominal”? Because in real-world application, pressure limits are heavily influenced by:
• fluid/medium temperature,
• duration of operation,
• connection types used.
The PN value is strictly valid only at a temperature of +20°C. If the temperature of the working medium is higher, the allowable pressure for the pipe will decrease. For instance, a PN10 pipe operating at +40°C will withstand significantly less pressure. The number following the “PN” letters indicates the pressure value in bars.
For example:
▸ PN6 — the pipe is rated for pressure up to 6 bars. These are typically used for gravity-fed systems, irrigation, or non-pressure sewerage.
▸ PN10 — the pipe withstands pressure up to 10 bars.
▸ PN16 — the pipe can operate at pressures up to 16 bars. This is a common standard for water supply lines in residential plumbing or municipal networks.
The higher the PN value, the stronger the pipe and, accordingly, the thicker its wall for any given diameter.
How to Choose Correctly and Avoid Mistakes?
The market is vast, and it is not always easy to tell if you are looking at a quality product. Here is what to pay attention to when buying a PE pipe:
✦ Presence of complete markings: polymer type, SDR, PN, production date, manufacturer name, and standard number.
✦ Certificates: for drinking water pipelines, conformity and sanitary certificates are absolutely mandatory.
✦ Uniformity of color and consistent wall thickness along the entire length.
✦ Technical passport or minimal product documentation provided by the manufacturer.
The question “is this pipe certified?” is never a mere formality. It determines not only reliability but basic safety. This is especially vital when dealing with drinking water, gas distribution, or responsible technical pipelines.
What About Codes and Standards?
Polyethylene pipes are manufactured in strict accordance with:
✧ DSTU EN 12201 (for water supply),
✧ DSTU EN 1555 (for gas supply).
These regulatory documents strictly govern:
• dimensions and geometric tolerances,
• mechanical properties,
• conditions for transportation and storage.
If a manufacturer claims compliance with standards — you have the legal right to view the technical documents or certificates upon request.
Why Choose “Planet Plastic” Polyethylene Pipes?
The “Planet Plastic” plant is a Ukrainian manufacturer with over 20 years of expertise in polyethylene processing. We produce pipes exclusively from premium virgin HDPE, adhering to all strict quality standards.
Our product lineup includes:
✦ pipes for drinking water supply (PE100, SDR9–33),
✦ pipes for gas supply (certified under DSTU),
✦ technical pipes for irrigation, drainage, and cable conduits.
We offer various diameters, custom packaging options (coils/coils in bays or cut lengths), and delivery solutions. Specialist consultation? Absolutely!
A polyethylene pipe is not just “another type of pipe.” It is a modern engineering solution suitable for dozens of tasks — from a basic backyard garden irrigation network to a high-responsibility municipal gas main.
But it is important to remember:
• pipes differ fundamentally by design,
• proper markings matter,
• a verified manufacturer is your ultimate guarantee of quality.
In our next material, we will cover: “How to correctly select a PE pipe for your specific requirements.”
If you need expert advice right now — our technical specialists are ready to help.