Establishing the need for repair
There are a number of reasons to consider repair, but initially, one question that must be answered is, do any factors deem it essential?
This will relate to the risks and consequences of not conducting a repair, for which the following must be considered:
- What is the function of the part, component or structure in question?
- What are its operating conditions: static/cyclic load and environment?
- Are there safety implications related to its failure?
- Are there codes, standards or customers’ expectations that clearly identify that a repair is necessary?
- How will a given defect impact the performance and lifetime of the product?
Repair-related factors to consider
If a repair is necessary, a number of factors should be considered to enable the correct and best repair methodology to be adopted. These include:
- Establishing the nature (size, shape and position) of the defect(s) – which non-destructive test methods are necessary?
- What processes can or should be considered to conduct a weld repair?
- What external factors or constraints may limit the choice of repair method (process and procedure)? For example, is it practical to perform heat treatment that is normally necessary for the material in question?
- Does the part or structure deem repair trials necessary to develop and qualify a weld repair procedure and personnel?
- Is third party inspection necessary?
Addressing these and other questions requires knowledge and expertise related to welding and joining processes, welding engineering, non-destructive testing, materials, corrosion, structural integrity, quality and safety and training. TWI has a team of recognised experts in all of these areas.
Welding and fabrication expertise
TWI is an industry leader in joining technology and is recognised globally as a centre of excellence. Our qualified engineers have many years of experience across all aspects of fabrication ranging across many industry sectors, including construction and engineering, aerospace, automotive, energy and environment, oil and gas, electronics, photonics, medical, chemical, equipment, consumables and materials. Remedial techniques are applied by skilled technologists and can often lead to innovative solutions.