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D/S S10000 Tubular Recertification Services

Multimarine Services Ltd successfully completes the tubular Inspection of over 900 Drill Pipes for D/S SAIPEM 10000



Project: HMF-H Marine Riser 10 Year Re-certification
Start Date: April 2015
Completion Date: Ongoing
Drilling Rig: SAIPEM 10000
OEM: GE Oil & Gas
Riser Type: HMF-H
Certifying Body: American Bureau of Shipping (ABS)
No. of Recertified Joints: 90ft Joints (52 pcs), 5ft Joints (2 pcs), 10ft Joints (2 pcs), 15ft Joints (2 pcs), 20ft (1 pc), 40ft (1 pc)


Multimarine Services Ltd is a GE Oil & Gas Approved Contractor for the Overhaul & Repairs (O&R) HMF-H Marine Risers.

In April 2015, Multimarine Services Ltd was appointed by GE Oil & Gas to complete the Full 10 Year Recertification of 52 x 90ft Riser Joints and 8 x Pup Joints of the D/S SAIPEM 10000. All works are being completed in Multimarine’s facilities in Limassol Port and include the following:

Handling, transportation and storage of the Riser Joints with an in-house fleet of Mobile Cranes; Joints

Provision of customized tools & complete disassembly of Riser Joints to component level

  • Buoyancy Modules
  • Hardware (thrust collars, threaded inserts, locking nuts, riser bolts, nose pins/seal subs)
  • Auxiliary Lines

Traceability & Document Control

Cleaning and preparation for Inspection

  • High Pressure Water Cleaning (HPWC) at 250 bar
  • High Pressure Water Jetting (HPWJ) at 1,500 bar
  • Abrasive Blasting (angular, sharp shaped grit)
  • Vacuum Abrasive Blasting (angular, sharp shaped grit)
  • Soda Blasting

Full Non-Destructive Testing (as per SNT-TC-1A) & other methods of inspection

  • Visual Testing (VT)
  • Magnetic Particle Testing (MT) – colour contrast and fluorescent
  • Liquid Penetrant Testing (PT) – colour contrast and fluorescent
  • Ultrasonic Testing (UT) including wall thickness
  • Phased Array Testing (PA) - Optional
  • Eddy Current Testing (ET) – Optional
  • Brinell Hardness Testing
  • Positive Material Identification (PMI)
  • Dimensional Testing

Repair and/or re-manufacture as required to restore compliance of failed components

  • Auxiliary Lines – repairs and/or complete re-fabrication from new parts and pipe
  • Main Tubes – cutting and welding of new pipe
  • Buoyancy Modules – repairs

Methods of welding using approved Welding Process Specifications include:

  • GTAW – manual
  • GMAW – semi automatic
  • SMAW – manual
  • FCAW – semi automatic
  • SAW – automatic

Hydrostatic Pressure Testing

Coating of Marine Riser, Buoyancy Modules & Hardware

  • Surface dust assessment, surface profiling and dry film thickness measurements
  • Application of approved Protective Coating Systems
  • Galvanizing of hardware
  • Phosphate Coating of hardware

Complete assembly of Riser Joints, maintenance and storage

Issue of CoC

Issue of Data Book for each Marine Riser Joint