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2. HDPE pipe - Wikipedia

   en.wikipedia.org/wiki/HDPE_pipe

   HDPE pipe is a type of flexible plastic pipe used to transfer fluids and gases. It is often employed for replacing aging concrete or steel main pipelines . Constructed from the thermoplastic HDPE (high-density polyethylene ), it has low permeability and robust molecular bonding, making it suitable for high-pressure pipelines .

3. High-density polyethylene - Wikipedia

   en.wikipedia.org/wiki/High-density_polyethylene

   HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]

4. Electrofusion - Wikipedia

   en.wikipedia.org/wiki/Electrofusion

   Electrofusion welding is beneficial because it does not require the operator to use dangerous or sophisticated equipment. After some preparation, the electrofusion welder will guide the operator through the steps to take. Welding heat and time is dependent on the type and size of the fitting.

5. Electrofusion welding - Wikipedia

   en.wikipedia.org/wiki/Electrofusion_Welding

   Because of the consistency of the electrofusion welding process in creating strong joints, it is commonly employed for the construction and repair of gas-carrying pipelines. [2] The development of the joint strength is affected by several process parameters, and a consistent joining procedure is necessary for the creation of strong joints.

6. Heat fusion - Wikipedia

   en.wikipedia.org/wiki/Heat_fusion

   HDPE pipe fusion. Heat fusion (sometimes called heat welding, butt welding or simply fusion) is a welding process used to join two different pieces of a thermoplastic. This process involves heating both pieces simultaneously and pressing them together. The two pieces then cool together and form a permanent bond.

7. Hot plate welding - Wikipedia

   en.wikipedia.org/wiki/Hot_plate_welding

   With hot wedge welding, the speed of travel is an added parameter as the wedge unit is self-propelled by the rollers. The typical temperature range when welding high-density polyethylene (HDPE) is 220 to 400 °C (428 to 752 °F); the travel speed is typically 0.7 to 4 metres per second (2.3 to 13.1 ft/s). [5]

8. Implant induction welding of thermoplastics - Wikipedia

   en.wikipedia.org/wiki/Implant_Induction_Welding...

   Implant induction welding is a joining method used in plastic manufacturing. The welding process uses an induction coil to excite and heat electromagnetically susceptible material at the joint interface and melt the thermoplastic. The susceptible material can be contained in a gasket placed between the welding surface, or within the actual ...

9. Plastic weld non-destructive examination - Wikipedia

   en.wikipedia.org/wiki/Plastic_weld_non...

   Its use is mainly limited to joint fit-up and detecting surface breaking flaws. It can be done as an in-process inspection, while the welding is occurring, or on the completed weld. In-process inspections can show problems with the weld such as discoloration, indicating thermal degradation, bubbles, scratches, and weld bead problems.