HDPE pipe butt fusion welding machine.
It is used for joining thermoplastic pipes and fittings made of materials like PE, PP, PB, and PVDF.
The machine uses heat and pressure to fuse the ends of two pipes together to create a durable, leak-proof joint.
This specific model appears to be a manual or semi-manual machine with four clamps for securing the pipes during the welding process.
It is a common tool in plumbing and industrial applications for pipeline installation.