Capacitor Discharge (CD) Weld Pins, also known as insulation weld studs or insulation weld pins, are precision fasteners designed for capacitor-discharge stud-welding systems. They are used to securely fix thermal insulation materials onto metal surfaces with fast, clean, and permanent attachment—without drilling, screws, or adhesives.

Installed using a CD stud welding machine, these CD pins create a strong and consistent metallurgical bond in milliseconds, ensuring high welding reliability and installation efficiency. After welding, insulation materials such as mineral wool, rock wool, or fiberglass can be placed over the pins and fixed using self-locking washers or retaining caps.

CD weld pins are widely used in HVAC duct insulation, industrial thermal insulation systems, shipbuilding, boilers, and building envelope insulation projects. As a key type of stud welding pin, they provide significantly faster installation speed and more stable performance compared with traditional fastening methods.

Manufactured from low-carbon steel, stainless steel, or aluminum, insulation weld pins offer excellent weldability and are compatible with most capacitor discharge stud welding equipment. They are a reliable and cost-effective fastening solution for global insulation installation projects.