The names PE80 and PE100 are based on the long-term strength of the corresponding material and are referred to as the minimum required strength (MRS). The minimum required strength (MRS) of the PE80 pipe is 8 MPa, while the MRS of the PE100 pipe is 10 MPa. PE100 raw material is an improved raw material than PE80, and its performance is higher than that of PE80.
Puhui only uses high quality PE80 or PE100 raw materials from world-renowned suppliers. The raw material suppliers we usually use are: Sinopec, Borealis and so on.
Due to the use of 100% original raw materials, we guarantee that all pipes and fittings delivered to our customers comply with the ISO4427 standard or other relevant international standards. For all HDPE pipes, HDPE pipe fittings, we can provide 20 years of warranty for normal use.
In addition to HDPE pipe, Puhui also supply complete fittings, including: dn20-110mm socket welding fittings, dn63-800mm butt welding fittings, dn20-630mm fused fittings, dn20-110mm PP compression fittings.
Electric fusion welding is the process of joining two plastic pipes together using a single-use coupler with integrated wire heating coils. The fused control unit supplies power to the coil, heats and melts the plastic. When cooled, a gas tight joint is formed.
When the electric heating coil is energized, the plastic material in contact therewith melts and forms an expanded pool of molten plastic that is in contact with the surface of the pipe. Continued heating causes the pipe surface to melt and then mix with the molten plastic of the fitting. This mixing is critical to producing good welds. Also, proper delivery of energy to the heating coil is critical to producing molten plastic and making the process happen.
At the end of the heating cycle, the fittings and pipes are cooled and the molten material is cured to form a strong and strong joint. During this cooling phase, the joint must remain completely stationary as movement can break the interface and cause a leak path.
In order to ensure a high quality joint, the following conditions must be met:
The heating coil needs to be as close as possible to the pipe/fitting interface.
The heat distribution is uniform over the length of the "hot zone".
Precise control of melt pressure and temperature.
Protect the heating coil from damage before soldering and during soldering.
The main difference between conventional hot melt and electrical fusion is the method of applying heat. In traditional hot melt (butt, saddle and socket) connections, heating tools are used to heat the pipe and fitting surfaces. The fused joint is heated internally or by a conductor at the joint interface or by a conductive polymer. Heat is generated when current is applied to the conductive material in the fitting. Electro-fusion joints are required for PE pipe-to-tube connections made using the electrofusion process.
SDR stands for the size ratio, which is the average outer diameter of the PE pipe divided by its minimum wall thickness. The use of SDR enables manufacturers to produce a standard set of DR pipes. SDR includes 11,13.6, 17, 21, 26 and 33.
A fused connecting pipe can be considered as a continuous pipe without a joint. On the other hand, gasket joints are a source of leakage and water loss in many water systems. If the gasket is not properly installed, if the gasket does not properly lubricate the gasket, if the gasket is not properly lubricated, if a negative pressure (vacuum) occurs in the pipe, if ground movement or bottom groove consolidation occurs, if a significant thermal change occurs, or if the gasket burns out due to surge pressure, a leak may occur. So weld joints are generally considered to be superior to gasket joints to prevent leakage.
