PPH Pipes: Outstanding Features and Precise Installation Methods

In the field of fluid transport in modern industrial and civil engineering, polypropylene pipelines are highly valued for their excellent performance. Among them, PPH pipes  play an indispensable role in specific applications such as corrosive media transport and chemical wastewater drainage, thanks to their unique advantages.

I. Notable Features of PPH Pipes

PPH pipes are not ordinary polypropylene pipes; they are extruded from homopolymer polypropylene resin, and their core features are prominent:

1. Excellent Corrosion Resistance: This is the most notable characteristic of PPH pipes. They can withstand the erosion of most chemical substances, whether acids, alkalis, or salt solutions, maintaining stable chemical properties. They are particularly suitable for conveying corrosive media in sectors like chemical industry, electroplating, and wastewater treatment.

2. Outstanding High-Temperature Resistance: Compared to ordinary PP pipes, PPH pipes can withstand higher operating temperatures. The long-term use temperature can reach over 90°C, with even higher short-term peak temperatures, making them perform excellently in high-temperature fluid transport.

3. High Rigidity and Impact Resistance: The pipe material is hard, with high mechanical strength, able to withstand certain internal and external pressures. It also has good impact resistance, is not easily brittle, and has a long service life.

4. Clean, Non-Toxic, and Environmentally Friendly: The raw materials comply with food hygiene standards. The pipes do not scale or breed bacteria, making them safe and reliable for use in pure water and drinking water systems.

5. Easy Installation and Cost-Effectiveness: PPH pipes are lightweight, making transportation and installation convenient. They primarily use heat fusion welding for connections, resulting in high joint strength and excellent sealing, achieving an integrated pipeline system with no risk of leakage.

II. Scientific Installation Methods for PPH Pipes

To fully leverage the excellent characteristics of PPH pipes, standardized installation and construction are crucial. The installation process is meticulous and involves key steps as follows:

1. Pre-Installation Preparation:

• Drawing Review: Familiarize yourself with the design drawings to clarify the pipeline route, slope, support/hanger locations, and connections to equipment interfaces.

• Material Inspection: Check the appearance of pipes and fittings for damage or deformation, and verify specifications and models.

• Tool Preparation: Prepare specialized PPH heat fusion welding machines (such as butt fusion welders, socket fusion welders), cutters, cleaning tools, etc.

2. Pipeline Installation and Connection:

• Measurement and Cutting: Measure and use a dedicated cutter to cut the pipe squarely based on onsite measurements, ensuring a clean, burr-free cut.

• Cleaning and Marking: Thoroughly clean the welding zones of the pipes and fittings and the welding tool heads using alcohol or lint-free wipes. Mark the heat fusion depth on the pipe end.

• Heat Fusion Connection: This is the core step. Simultaneously place the pipe and fitting into the welder's heating tool. Once the material reaches a molten state, quickly and without rotation, remove and align them, pushing them together. Ensure even alignment pressure and accurate heating/cooling times to form a perfect, uniform bead. The process must be continuous and swift, avoiding reheating.

• Cooling and Setting: After connection, allow the joint to cool naturally. Do not move or stress it during this period to ensure complete solidification and maximum joint strength.

3. Pipeline Securing and Testing:

• Support Installation: Install pipe supports, hangers, or clamps according to the design specifications. PPH pipes have a relatively high thermal expansion coefficient, so it's essential to properly set fixed and sliding supports to allow for thermal expansion and contraction.

• System Pressure Testing: After installation is complete, a pressure test is mandatory. Slowly fill the system with water to purge air, then gradually increase the pressure to the required test pressure. Maintain this pressure for the specified duration and check all joints for leaks. The system should only be concealed or backfilled after passing the pressure test.