Piping Supervisor

Job Purpose

Piping Inspection Execution

• Inspect process piping systems for:
• **Wall loss**
• – internal corrosion, erosion, flow-accelerated corrosion (FAC), and galvanic corrosion
• **Corrosion Under Insulation (CUI)**
• – particularly on carbon steel, low alloy, and austenitic stainless steel lines operating between -4°C to 175°C (25°F to 350°F)
• **Mechanical damage**
• – dents, gouges, cuts, arc strikes, and deformation
• **Cracking**
• – fatigue, stress corrosion cracking (SCC), chloride SCC (stainless steel), and hydrogen-induced cracking (HIC)
• Perform external visual inspection of:
• Piping circuits and components (flanges, fittings, valves, expansion joints)
• Pipe supports, hangers, guides, and restraints
• Dead legs, stagnant zones, and low-flow areas (high corrosion risk)

Documentation & Record Review

• Review:
• **Piping isometrics**
• – verify line numbers, dimensions, materials, and weld locations
• **P&IDs (Piping & Instrumentation Diagrams)**
• – confirm line designation, fluid service, design conditions, and class rating
• **Inspection history records**
• – previous thickness data, repair history, corrosion rates, and RBI assessment
• Ensure documentation matches field conditions before inspection commencement

NDT Witnessing & Acceptance

• Witness and accept Non-Destructive Testing inspections:
• **UT Thickness**
• – spot readings, grid scanning, profile (B-scan / C-scan mapping)
• **Radiography (RT)**
• – film interpretation for corrosion mapping and weld integrity (including digital radiography)
• **Visual (VT)**
• – surface defects, coating condition, support contact, leaks, and vibration damage
• Ensure NDT techniques, equipment calibration, and personnel certifications meet:
• API 570 requirements

• ASME Section V

• Client specific procedures
• Review NDT reports and accept with sign-off authority

Repair & Alteration Oversight

• Review and approve
• piping repair/alteration procedures
• :
• Weld repair procedures (WPS / PQR / WPQ)
• Installation of repair sleeves (full encirclement, partial wrap)
• Pipe replacement scopes (cut-outs, respools)
• Grinding and blending of defects
• Verify post-repair activities:
• NDT of repaired area (MT / PT / UT / RT as applicable)
• Pressure testing (hydrotest or pneumatic) when required per code
• PWHT (Post Weld Heat Treatment) for thickness/weld requirements

Non-Conformance & Quality Control

• Issue

Non-Conformance Reports (NCRs)

• for:
• Non-compliant inspection findings (wall thickness below minimum, severe CUI)
• Substandard repairs or welding
• Missing or incorrect documentation (material certs, WPS, NDT reports)
• Unauthorized alterations or unapproved repairs
• Assign NCR priority (Critical / Major / Minor)
• Follow up on NCR close-out:
• Review corrective action plans
• Verify implementation through re-inspection
• Sign-off on NCR closure

Material Verification (PMI)

• Review and verify

Positive Material Identification (PMI)

• per API 578
• Ensure:
• All alloy materials (chrome, stainless, high-temp alloys) are verified
• PMI results match material specifications on isometrics and MTCs
• Replacement materials meet original design requirements

Coordination & Reporting

• Liaise with:
• **Client**
• – Qatar Energy / operator inspection and engineering teams
• **Contractor teams**
• – piping maintenance, NDT, and repair crews
• Attend:
• Daily pre-shift meetings and safety briefings (TBT)
• Shutdown progress and inspection review meetings
• Submit:
• Daily inspection reports (summary of findings, NDT accepted, repairs signed off)
• Final integrity summary and turnover package at completion

Mandatory Certification

• **Valid API 570**
• (Piping Inspector) certification – mandatory and active

Experience

• Minimum
• 5 years
• of piping inspection experience in
• oil & gas / petrochemical
• industry
• At least
• 2 years
• of dedicated
• in-service piping inspection
• (corrosion monitoring, CUI, damage mechanism identification)
• Experience with
• new construction piping inspection
• (witnessing hydrotest, NDT, and final sign-off) is an advantage
• At least
• 1 shutdown / turnaround campaign
• as a piping inspector

Technical Knowledge

• **ASME B31.3**
• – Process Piping (design, fabrication, inspection, testing, and acceptance criteria)
• **API 571**
• – Damage mechanisms affecting piping systems:

• CUI (Corrosion Under Insulation)

• CO2 corrosion, H2S corrosion (sour service)
• Chloride SCC (stainless steels)
• HIC / SOHIC (wet H2S service)
• Graphitization, creep, thermal fatigue
• **API 574**
• – Inspection practices for piping systems (carcinization, thickness monitoring locations, inspection intervals)
• **API 578**

requirements

Regional Experience

• Previous experience in

(Qatar, Saudi Arabia, UAE, Kuwait, Oman, Bahrain)

• **LNG plant experience**
• – Ras Laffan, Ruwais, Jubail, or equivalent
• Familiarity with

QatarEnergy

• (formerly QP / RasGas) procedures and specifications
• Experience processing

NCRs