Detailed Overview

A specialized component of a heat treatment system used for capacitor discharge welding of thermocouple studs onto a component’s surface. It creates a temporary, secure attachment point without excessive heat or damage to affix thermocouples (T/Cs). The welder provides a quick and secure solution for accurate temperature monitoring during pre- and post-weld heat treatment.

A specialized system for quickly and securely attaching thermocouples to metal surfaces for heat treatment.

• This portable Capacitor Discharge (CD) welding unit is used to attach small metal studs or pins to a workpiece, which in turn are used to anchor thermocouples for temperature monitoring during Post-Weld Heat Treatment (PWHT).
• The CD method is chosen because it produces a very fast weld (milliseconds), resulting in a minimal heat-affected zone (HAZ), thus preventing damage to the surrounding material or its heat treatment state.
• It ensures reliable thermal contact and accurate temperature measurement, which is critical for compliance.
• The package includes the stud pin welding unit, a welding torch with cables, and a supply of weld pins and collets (chucks) for holding the studs.

Top Features & Benefits

• Specialized equipment for thermocouple attachment and insulation pin fixing.
• Uses the Capacitive Discharge (CD) or Drawn Arc (DA) welding method for speed and minimal heat input.
• Provides a secure, temporary attachment point for temperature sensors (T/Cs) and insulation.
• Essential for accurate PWHT monitoring and complying with heat treatment procedures.
• Portable and lightweight design for easy use in the field and on-site.

Primary Uses & Functions

A device used to weld studs or pins (often M3 or T/C specific sizes) onto workpieces, primarily for the purpose of attaching thermocouples for heat treatment control and monitoring of large fabricated structures.

Real-World Applications

• Attaching Thermocouples and Insulation Pins to metal surfaces (e.g., carbon steel, stainless steel).
• Preparation for Post-Weld Heat Treatment (PWHT) or pre-weld heating of pipes, pressure vessels, and tanks.
• Used in industrial heating and stress relieving applications that require certified and traceable temperature control.
• Welding of small studs for securing lining material or inspection gauges.

Industry Solutions

• Oil & Gas (Pipeline and vessel Heat Treatment)
• Petrochemical (Furnace and reactor Heat Treatment)
• Power Generation (Boiler and turbine component Heat Treatment)
• Manufacturing (Heavy fabrication and stress relieving)
• Construction (On-site welding and heat treatment)

Technical Specifications

Compatibility

• Used to weld thermocouples (Type K, J, etc.) to the surface of a component quickly and securely for accurate heat treatment temperature monitoring.
• Requires thermocouple wires and compatible welding studs/pins (e.g., ferrules, split pins) and collets/chucks specific to the stud diameter.

What’s In The Box?

• Stud Pin Welder power unit (CD or DA type).
• Welding gun/Handpiece (torch) with connecting lead.
• Earth clamp and cable.
• Set of collets (chucks) for various stud/pin sizes.
• Starter kit of studs/pins (consumables).
• User manual and carry case.

Also Known As

Thermocouple Attachment Welder, Weld Pin Bonder, CD Welder, PWHT Stud Welder