HOPE S90 Electrofusion Coupling Fitting

A: The qualification can be intuitively judged through two steps: In terms of appearance inspection, the welded part should be smooth and flat, without defects such as air holes, cracks, or deformation, and the color should be consistent with the fitting body-this is particularly important for conduits & fittings used in unistrut channel systems, as uneven joints may affect subsequent installation. If there are bulges or charred marks, it is unqualified; In terms of tightness inspection, a water pressure or air pressure test can be carried out. After filling with the medium, gradually increase the pressure to the design pressure, maintain it for more than 30 minutes without leakage, and the pressure drop is within the allowable range, which indicates that the connection quality is up to standard. For products matched with unistrut channel, it is also necessary to check whether the welded joint can be smoothly fixed with the channel components without stress concentration. In addition, high-quality products (including their supporting plastic cap and installation accessories) are equipped with a unique identification code, which can trace welding parameters, further ensuring the reliability of the entire conduits & fittings system.

A: The core installation steps need to grasp three points: First, pre-treatment: cut the pipe with special tools to ensure the end face is vertical, thoroughly remove the oxide layer, dust, and oil stains on the connection part-before operation, confirm that the plastic cap of the fitting is intact to avoid contamination-and avoid affecting the welding effect; Second, insertion and positioning: insert the pipe into the fitting to the limit scale to ensure stress-free fitting. For conduits & fittings installed on unistrut channel, use special fixtures to fix both the fitting and the channel to prevent misalignment during welding; Third, parameter matching: use a standard-compliant electrofusion welding machine, set the welding time and voltage according to the parameters marked on the fitting. After welding, it is necessary to stand and cool for more than 30 seconds, and it is forbidden to touch or apply pressure immediately. After cooling, the assembled conduits & fittings can be formally fixed to the unistrut channel to complete the overall installation.

A: If the first welding does not meet the qualified standard, qualified electrofusion fittings can be welded again once-this applies to most common conduits & fittings, including those used with unistrut channel. It is necessary to thoroughly clean the residual molten material at the welding part, check that the inner wall of the fitting (and the plastic cap if it is not discarded) is free of damage, and re-operate in accordance with standard procedures to avoid resource waste. However, it should be noted that if the electric heating wire inside the fitting is damaged, cracked, or deformed, it cannot be reused, and a new fitting must be replaced. When dealing with failed welding joints in unistrut channel-mounted pipeline systems, the unqualified part should be completely cut off, and a new section of pipe and corresponding conduits & fittings should be cut for connection. Secondary repair on the original joint is prohibited to ensure the overall safety of the pipeline system, especially for scenarios with high stability requirements.