Services

Bespoke Fabrication

With a floor space of 80,000 sq feet Oldham Engineering is suited as a fabrication partner for all your requirements.  We can handle fabrications up to 30 tonnes on a single lift, and 45 tonnes on a dual lift.

We specialise in complex and high integrity fabrications for the Nuclear / Defence & Sub Sea sectors amongst others, which demand a high level of welder qualification and quality control.

Materials and Qualifications

• Carbon Steel – BSEN15614 & ASMEIX
• Carbon Steel LT50 – ASMEIX
• High Strength Steel S690 QL – BSEN15614 & ASMEIX
• Stainless Steel – BSEN15614 & ASMEIX
• Duplex 2205 - ASMEIX

Welding Processes

• Flux Cored Arc Welding
• MIG Welding
• MMA Welding
• Shielded Metal Arc Welding
• Submerged Arc Welding
• TIG Welding

Welding Positions Qualified

• All positions

The 5 P’s
After the quality standard has been established, the most important step toward its achievement is the selection of the best process and procedures. By giving attention to the five Ps, weld quality will come about almost automatically, reducing subsequent inspection to a routine checking and policing activity. The five Ps are:

• Process Selection--The process must be right for the job.
• Preparation--The joint configuration must be right and compatible with the welding process.
• Procedures--To assure uniform results the procedures must be spelled out in detail and followed carefully during welding.
• Pretesting--By full-scale mockups or simulated specimens the process and procedures are proved to give the desired standard of quality
• Personnel--Qualified people must be assigned to the job.

NDT

Visual inspection while work is in progress

Visual inspection will begin before the first  arc is struck. The materials will be examined to see if they meet specifications for quality, type, size, cleanliness, and freedom from defects. Foreign matter--grease, paint, oil, oxide film, heavy scale that could be detrimental to the weld should be removed.   Alignment and fit of parts and the fixtures will be inspected,  Joint preparation will be checked.
This early inspection will be a significant factor in weld quality.

Visual inspection after welding

The objective of visual inspection here is not only to seek defects not permissible under the quality standard, but also to check for distortion in the fabrication.

MPI (Magnetic Particle Inspection)

Will used for the detection of surface and sub-surface defects in ferrous materials.  They make use of an externally applied magnetic field or electric current through the material, and the principle that the magnetic flux will leave the part at the area of the flaw.

DPI (Dye Penetrant Inspection)

Also called liquid penetrant inspection (LPI), will be used to locate surface-breaking defects.  DPI may be applied to all non-ferrous materials, but for inspection of ferrous components MPI is preferred for its subsurface detection capability. LPI is used to detect casting and forging defects, cracks, and leaks in new products, and fatigue cracks on in-service components.

Radiography

Is used to detect internal flaws in welds, the radiographic film gives a permanent record of the results.

Ultrasonics

Generally used for detecting defects in plate 10mm and above and the preferred method for detecting planar defects.

Calibration

All welding sets are calibrated to BS7570 the Code of Practice for Validation of Welding Sets.

For more detailed information on how Oldham Engineering can help in your fabrication requirement, please contact our sales team on the number above.