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Welding Nozzle ｜ Precise Flame Control for Consistent Weld Quality
Key Takeaways
• The Welding Nozzle is a core component that defines flame shape and temperature in gas welding operations
• Selecting the appropriate nozzle based on workpiece thickness, gas type, and welding torch directly affects weld quality
• Enables stable melting, reduces burn-through, and minimizes rework
• Available in models covering everything from precision welding to heavy industrial applications
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In gas welding, flame stability is a critical factor that determines weld quality. The Welding Nozzle controls gas flow rate and flame shape. If an unsuitable nozzle is selected, incomplete fusion, excessive combustion, or inconsistent weld beads can easily occur. Therefore, choosing the right Welding Nozzle for the application is a fundamental requirement for a reliable welding process.
In actual welding operations, issues such as burn-through on thin materials or insufficient melting on thick materials are often encountered even when using the same welding torch. The primary cause is typically an incorrect nozzle size. Selecting the correct Welding Nozzle helps achieve the “right flame for the job” and reduces the need for on-site adjustments.
The Welding Nozzle is designed to define flame size and shape, control temperature at the weld zone, and distribute heat appropriately according to material thickness. The result is a smooth, strong weld bead with consistent quality.
🔷 Welding Nozzle Model Details
• 6120M
Gas: Acetylene
Plate thickness: 0.1–2.5 mm
Sizes: No. 10 / 15 / 25 / 50 / 75 / 100 / 150
Compatible with: No.00 Welding Torch MS
• 6220
Gas: Acetylene
Plate thickness: 0.5–2.5 mm
Sizes: No. 25 / 50 / 75 / 100 / 150
Compatible with: Small Welding Torch
• 6320M
Gas: Acetylene
Plate thickness: 1–13 mm
Sizes: No. 50 / 75 / 100 / 150 / 225 / 350 / 500
Compatible with: Medium Welding Torch
• 6350M
Gas: LPG
Plate thickness: 1–12 mm
Sizes: No. 10 / 11 / 12 / 13 / 14 / 16 / 18 / 21
Compatible with: Medium Welding Torch
• 6520
Gas: Acetylene
Plate thickness: 5–25 mm
Sizes: No. 10 / 13 / 16 / 20 / 25
Compatible with: B Welding Torch
• 6550
Gas: LPG
Plate thickness: 5–25 mm
Sizes: No. 19 / 21 / 23 / 25 / 28
Compatible with: B Welding Torch
• 6620
Gas: Acetylene
Plate thickness: 20–50 mm
Sizes: No. 30 / 40 / 50
Compatible with: No.3 Welding Torch
• 6650
Gas: LPG
Plate thickness: 12–50 mm
Sizes: No. 0 / 1 / 2 / 3 / 4 / 5 / 6 / 7
Compatible with: No.3 Welding Torch
Welding Nozzles are widely used in thin plate welding, repair work, fabrication, steel structures, heavy industry, and on-site field welding applications.
Selecting a Welding Nozzle that matches material thickness, gas type, and welding torch makes process control easier, produces cleaner weld beads, reduces rework, and increases overall production reliability.
Summary
Although small in size, the Welding Nozzle has a significant impact on weld quality. Choosing the right model helps enhance weld integrity, safety, and long-term operational efficiency.
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❓ FAQ
Q: How should a Welding Nozzle be selected?
A: Select based on material thickness, gas type, and the welding torch used.
Q: What happens if an oversized nozzle is used?
A: Excessive heat is generated, increasing the risk of burn-through and making weld control more difficult.
📚 Glossary (Key Terms)
Welding Nozzle: A device used to control flame shape and gas flow rate in gas welding
Gas Welding: A metal welding process that uses flammable gas as a heat source
Welding Torch: A device used to mix gases and generate a flame for welding
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