Pipeline Welding Backing Gas Protector (Inflatable Ring Type)
This protector is suitable for internal gas shielding of circumferential welds in corrosion-resistant alloy pipes such as nickel-based alloys, titanium alloys, stainless steel, and bimetal composite pipes.It keeps the weld and heat-affected zone (HAZ) within a shielding gas atmosphere during welding, preventing oxidation, discoloration, and alloy element burnout while maintaining arc stability.
Pipeline Welding Backing Gas Protector (Inflatable Ring Type)
This protector is suitable for internal gas shielding of circumferential welds in corrosion-resistant alloy pipes such as nickel-based alloys, titanium alloys, stainless steel, and bimetal composite pipes.It keeps the weld and heat-affected zone (HAZ) within a shielding gas atmosphere during welding, preventing oxidation, discoloration, and alloy element burnout while maintaining arc stability.
The structure features double-sided flexible inflatable ring seals with independent control for both sides. It includes shock-absorbing support rollers for smooth movement within the pipe without jamming.
This backing gas shielding device is designed for internal gas shielding of circumferential welds in corrosion-resistant alloy pipelines. During welding, it envelops the back-side weld zone in a protective gas atmosphere, thereby preventing the depletion of alloying elements and oxidation of the back-side metal.
Applicable Pipe Diameter: ≥DN100 Minimum Equipment Weight: 1.5 kg
Applicable Wall Thickness: > 3 mm Travel Mode: Manual (Electric crawler optional)
Inflatable Seal Pressure: 0.2–0.3 MPa Inflation Hose Length: 14 m
Widely used in petroleum, chemical, natural gas, boiler, nuclear power, plant line construction, and pipeline engineering, etc.
The products have been successfully applied in composite pipe projects constructed by Sichuan Oil Construction, China Petroleum First Construction, Daqing Oil Construction, and Dagang Oil Construction, etc. They feature excellent gas shielding performance and high construction efficiency, and have been highly recognized by all project units.
|
Model |
Bend Capability |
Sealing Method |
|
APNBS168 |
Yes |
Inflatable Ring Seal |
|
APNBS325 |
Yes |
Inflatable Ring Seal |
|
APNBS406 |
Yes |
Inflatable Ring Seal |
|
APNBS457 |
Yes |
Inflatable Ring Seal |
|
APNBS508 |
Yes |
Inflatable Ring Seal |
|
APNBS610 |
Yes |
Inflatable Ring Seal |
