Coded Welding

At MMG welding we have a team of highly skilled and experienced coded welders. All of our welding engineers have complete welding certification to EN / ASME Standards. We also have in-house training and testing facility on request.

On a daily basis, our coded welders provide a welding service to the fishing industry and have vast experience welding on fishing vessels from refrigerant gas pipes, fuel lines, RSW tanks, and structural steel hull plating.

Our coded welders have welded pig launchers on the Corrib gas line for hydro and pig testing as well as sea-fastening, hazardous methadone tanks onto the back deck of the Normand Reach.

All welding is carried out to EN A.S.M.E. IX specifications.

 PQRs Weld positions

Carbon pipe / Stainless Steel (pipe 6G).

Vertical Tee fillet (plate)

Horizontal Tee fillet (plate)

Vertical butt joint (plate)

Horizontal but joint (plate)

Welding Process

Arc process 111: Carbon Pipe, Steel Plate.

Tig process 114: Carbon tube Stainless steel tube, Aluminum plate.

Mig process135: Carbon tube and plate, steel plate, Aluminum plate, (136) Flux core.

Material Grades:

316L Stainless steel
Carbon seamless tubePlate S275, S355, S460
Lloyd marine grade plate

We provide in-house certification and testing on clients’ requests.

Weld Testing

Visual Inspection (VT)

Radiographic Inspection

Magnetic Particle Inspection (MPI)

Liquid Penetrate Inspection (PTI)

Ultrasonic Inspection (UT)

Pressure Vessel


At MMG Welding we strive to adhere to all health and safety procedures and we constantly monitor and update our working systems to ensure best practices for both staff and clients.

Welding Standards·

ASME 1X:2010, BS EN 9606-1/2, WPQR, EN ISO 15614 standard.

  • Codes/ Procedures – Lloyds BV, DNV, TUV, MSO.
  • Examined by TUV Rheinland
  • PED approved