Expander Operator

Core Responsibilities

Mechanical Expansion: Operate the high-pressure hydraulic mechanical expander to ensure the pipe meets final Outside Diameter (OD), Ovality,and Straightness specifications.

Expansion Ratio Control: Calculate and apply the correct expansion percentage (typically 0.8% to 1.5%) to ensure the yield strength of high-grade steel (X65, X70, X80) remains within standardise limits.

Tooling Setup: Select and install the correct expansion segments (Tools) and segment holders based on the pipe's internal diameter and wall thickness.

Step-by-Step Monitoring: Manage the Step Length and Overlap during the expansion cycle to avoid visible ridges or uneven diameter across the pipe length.

Pressure Management: Monitor hydraulic pressures via HMI to ensure consistency and to detect potential machine failures or pipe bursts early.

Quality Inspection: Verify the final dimensions using Pi-tapes and templates immediately after the expansion process.

Technical Skill Set

Machine Operation: Proficiency in operating HMI/PLC systems from manufacturers like Haeunsler, SMS Group, or Fontijne Grotnes.

Hydraulics Expertise: Understanding of high-pressure hydraulic cylinders, proportional valves, and lubrication systems.

Measurement Tools: Expert use of Pi-tapes, internal micrometres, and Go/No-Go gauges.

Metallurgy Awareness: Basic understanding of Work Hardening and how cold expansion affects the steel's toughness and yield-to-tensile ratio.

Key Qualifications

Education: ITI (Fitter/Machinist) or a Diploma in Mechanical Engineering.

Experience: 3–10 years of hands-on experience as a Pipe Expander Operator in an LSAW or UOE mill.

Preferred Attributes (Aramco & Global Standards)

Safety Excellence: Mastery of Lock-Out Tag-Out (LOTO) procedures

Zero-Defect Mindset: Ability to identify Expander Marks or surface scuffing that could lead to rejection

Employer Specific Expectations

·                 Strict adherence to standards regarding maximum allowed expansion ratios.

·                 Focus on minimizing Cycle Time per pipe while maintaining 100% compliance with international export standards.