Case Studies/Oil & Gas
Case 03 — Oil & Gas

Burner Shell
& Pressure
Components.

Automated robotic welding for burner shell fabrication and pressure component production. Full-process automation from loading to weld completion with UT-grade quality and multi-size compatibility.

Discuss This Application ← All Cases
Oil and gas equipment robotic welding Oil and gas — burner shell, pressure component fabrication, inspection-grade environment
Production Context

The Constraint: Inspection-Ready
Output Across Multiple Sizes.

The client required automated welding for burner shell fabrication — cylindrical pressure components in multiple diameter sizes — with output meeting inspection acceptance criteria without post-weld rework. The previous semi-manual process produced variable quality that required frequent rework and delayed delivery cycles.

The system had to accommodate multiple shell diameters with rapid program switching — no fixture changeover time was available within the production cycle. Arc stability across varying shell geometry required careful welding source selection and parameter management.

Safety automation was a non-negotiable requirement: the system needed integrated light curtain protection, a safe loading zone, and continuous operation capability — welding the current part while the operator loads the next, without production pauses.

>90%First-pass yield
1 operatorFull line operation
Multi-sizeShell compatibility
ZeroRework on qualified output
Engineering Evidence

Failure Risk &
Engineering Logic.

Where it could have failed
  • Arc instability on varying shell diameter — different curvatures requiring different torch angles and stand-off distances, producing spatter and inconsistent bead geometry
  • Rotary positioner speed inconsistency across shell diameters — constant robot speed with variable circumference producing non-uniform bead overlap
  • Inspection failure from inconsistent root pass — pressure components require full root fusion across the full circumference, not just at qualification sample positions
  • Safety system creating production pauses — light curtain interruptions during loading stopping the rotary positioner and disrupting the weld sequence
  • Size changeover requiring parameter adjustment time — no provision for rapid program switching within the production cycle
AGR engineering logic
  • OTC pulse-controlled welding source selected for low spatter and stable arc across varying shell geometry. Pulse parameters tuned per shell diameter — not a single parameter set for all sizes. Arc length control active throughout the circumferential weld
  • Rotary positioner with servo-controlled surface speed — speed adjusted automatically per shell diameter to maintain consistent weld travel speed regardless of circumference. Coordinated motion with robot controller — not independent rotation
  • Root pass engineering: weld sequence designed to ensure full fusion at root across the complete circumference. Inter-pass inspection protocol included in the process specification — not a final inspection activity
  • Safe loading zone defined by physical separation — operator loads on one side while robot welds on the other. Light curtain protection on the loading zone only. No weld interruption from normal loading activity
  • Rapid program switching via HMI selection — size change in under 30 seconds. All parameters, robot path modifications, and positioner speed adjustments loaded automatically from the selected program. No manual parameter entry
Production Result

What the Evidence
Proves.

Result 01 — Quality
>90% First-Pass Yield
Across all shell sizes in production operation. Zero rework on output meeting the inspection specification — consistently achieved, not occasionally achieved.
Result 02 — Efficiency
One Operator, Full Line
Single operator manages loading, size selection, and output inspection. No welding expertise required at the operating level — the process engineering handles quality, not the operator.
Result 03 — Flexibility
Multi-Size, No Delay
Size changeover under 30 seconds. Continuous production across the full shell diameter range without production pauses, fixture changes, or manual parameter adjustment.
← Previous
Construction Machinery
←
Next →
Others
→
Start With Your Constraint

Inspection-Sensitive Applications
Start From the Criteria.

If your application has UT, RT, or pressure testing acceptance requirements, the assessment begins from those criteria — and works back to the process engineering required to meet them consistently in production.

Discuss Your Project
Oil & gas industry page →
  • Burner shell and pressure component welding
  • Structural frame fabrication with inspection requirement
  • Multi-size production without fixture changeover
  • Safety-compliant automated operation