Quality Assurance
Every heater is checked at seven stages — from incoming raw material to outbound packing — before it leaves our facility.
Our Process
Quality Control Checkpoints
Every heater moves through these seven gates in order — raw material in, tested and packed product out.
1
Incoming Material Inspection
- Verify Material Test Certificates (MTC)
- Check heater sheath material grade (SS304, SS316, Incoloy, etc.)
- Confirm tube OD, wall thickness, and length
- Check terminal pins, ceramic beads, insulation, and cables
- Visual inspection for dents, rust, or damage
2
In-Process Inspection
- Check heating element resistance value
- Verify coil winding pitch and uniformity
- Inspect MgO powder filling density (if applicable)
- Check swaging/reduction dimensions
- Verify straightness of the heater
- Check brazing/welding quality
- Ensure proper terminal assembly
- Verify dimensions against the drawing
3
Welding Inspection
- Visual inspection (no cracks, porosity, undercut, or incomplete fusion)
- Weld size and profile as per drawing
- Dye Penetrant Test (DPT), if specified
- Leak test for welded joints
4
Electrical Testing
- Resistance test
- Insulation Resistance (IR) test (typically ≥100 MΩ at 500 V DC)
- High Voltage (Hipot) test
- Earth continuity test
- Power consumption verification
- Current measurement
5
Performance Test
- Voltage and current check
- Wattage output within tolerance (typically ±5% or customer specification)
- Surface temperature measurement
- Heating time verification
6
Final Inspection
- Overall dimensions
- Thread/flange size
- Identification marking
- Cable length and termination
- Visual finish and cleanliness
7
Packing Inspection
- Product cleaned and protected
- Test certificate included
- Correct labeling
- Safe packing to prevent transit damage
Paper Trail
Quality Documents
Every dispatch is backed by a documented, traceable inspection record.
How We Build
Manufacturing Capabilities
- Custom heater design as per customer drawings and specifications
- Stainless steel and Incoloy sheath heater manufacturing
- Precision tube bending and forming
- TIG, MIG, and spot welding
- High-quality brazing and termination assembly
- Moisture removal and baking process using industrial ovens
- Lead wire, terminal, and insulation assembly
- Prototype and batch production
Get In Touch
Questions About Our Quality Process?
Ask for inspection reports, test certificates, or calibration records for your order.