Welder Repairs Service

Lenoch Engineering offers coded welding for the swift repair of damaged and worn critical components, ensuring your machinery downtime is reduced with a reliable and cost-effective fix.

Our experienced, accredited, and knowledgeable team can advise on the best course of action for damaged parts, ensuring our comprehensive service has a solution for all types of challenges. Weld repairs restore components to their original dimensions, without the need for replacement - providing a cost-effective and time-efficient operation.

24/7 - Call us on +44 (0) 1788 576434

24/7 Breakdown Welder Repairs

Our complete customer transparency and customer support throughout this process ensures Lenoch Engineering are trusted by clients across the globe for the provision of optimised parts and componentry.

Weld repairs can be undertaken on-site with the help of our mobile unit, allowing us to minister to in-situ repairs and time-sensitive cases.

Lenoch Engineering provides a 24/7 response for emergency breakdown services, including weld repairs, making certain we can support clients during unexpected and scheduled downtime.

Our inspection and testing facilities ensure weld repairs are performed to the highest standard, rebuilding and repairing parts for top performance within their application. Inspections are carried out on a Faro Arm, for parts up to 3m in diameter.

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    Our weld repair operations are available for many types of metals, including dissimilar metals. We offer coded TIG, MIG, stick, and oxy for a reliable and durable repair.

    Lenoch Engineering works with various industries, including commercial and industrial sectors, for the repair of large and small worn and damaged parts.

    FAQs

    What are the major types of weld repair?

    We specialise in various types of weld repair, including:

    • MIG welding (Metal Inert Gas): MIG welding is a commonly used process that utilises a continuous wire electrode to join metals. It is known for its speed and versatility, making it suitable for various applications, including automotive repairs, fabrication, and general welding.
    • TIG welding (Tungsten Inert Gas): TIG welding is a precise and intricate process that uses a non-consumable tungsten electrode to create the weld. It offers excellent control over the heat input and produces high-quality welds. TIG welding is often chosen for critical applications such as aerospace, medical equipment, and artistic metalwork.
    • Stick welding (Shielded Metal Arc Welding - SMAW): Stick welding is a robust and versatile method that uses a consumable electrode coated in flux. It is commonly used for welding thick sections of steel and is suitable for outdoor and challenging environments.
    • Flux-cored arc welding (FCAW): FCAW is a variation of MIG welding that uses a tubular wire filled with flux. This method allows for welding in various positions and performs well on thick materials, making it ideal for heavy-duty repairs, construction, and shipbuilding.

    What are the steps in weld repair?

    Weld repair is a process used to fix or strengthen a weld that has defects or damage. The steps in weld repair generally include the following:

    1. Inspection: First, we identify any defects or damage on the object through visual inspection and non-destructive testing. This helps us to identify or understand the root cause of the current failure. As part of this, we assess the object or materials' suitability for welding.
    2. Preparation: We then clean and remove any damaged material. This typically involves cleaning the surface to remove any contaminants or oxidation. It may also require grinding or machining to remove any damaged or weakened material.
    3. Preheating: This is often needed to prevent cracking or distortion during the welding process.
    4. Welding: The repair weld then takes place, performed using the appropriate welding techniques, equipment and materials that we identified during our preparation. In doing so, we closely follow UK welding and joining standards and regulations.
    5. Post-weld treatment: Afterward the repair, we apply stress relieving or heat treatment to ensure the weld’s integrity and minimise the risk of future defects.
    6. Inspection and testing: We do this to verify the quality of our repair.
    7. Documentation: Finally, we record the procedure and materials you used, along with the results. This is crucial for quality control, traceability, and future reference.

    Is it ok to weld over a weld?

    Yes, generally welding over a previous weld is acceptable and can even be beneficial in specific situations. For instance, adding additional welds can reinforce a joint and increase its strength, which is crucial when the original weld has failed or is insufficient for the intended load. It is also necessary when making modifications to existing structures. However, caution should be exercised when the original weld has defects or is incompatible with the new weld. In such cases, it's better to remove the faulty weld and perform a fresh weld for optimal results and joint integrity.

    Can welds weaken over time?

    Yes, welds can weaken over time due to various factors:

    • The natural ageing process of materials can lead to fatigue and microstructural changes, reducing strength. 
    • Exposure to corrosive substances, extreme temperatures, or moisture can also deteriorate welds, especially in industries like oil and gas.

    Poor welding techniques and inadequate quality control can contribute to weld weakening. Regular inspections and maintenance are crucial to identify potential weaknesses. Our weld repair services address these concerns, conducting inspections, performing repairs, and ensuring welds meet industry standards and safety requirements. Regular maintenance and timely repairs ensure the longevity and safety of welds in various industrial applications.

    How many times can a weld be repaired?

    The number of times a weld can be repaired depends on the material, welding technique, and damage severity. In general, most welds can be repaired multiple times if certain conditions are met. 

    • The base material: Different materials like carbon steel, stainless steel, or aluminium may require specific repair approaches due to their unique properties.
    • Welding technique: Methods like TIG, MIG, or stick welding impact repairability differently. Some techniques may introduce excessive heat, limiting the number of viable repairs.
    • The severity of the damage: Minor defects can often be repaired without compromising integrity. Extensive damage may reduce the number of viable repairs.

    If you’re unsure whether your material can be rewelded, we recommended consulting with one of our experienced welding professionals to assess the weld accurately and determine the feasibility of a repair.

    What are the most common weld defects?

    Common weld defects can vary based on the welding process, materials, and conditions. Some frequently encountered defects include:

    • Porosity: Gas pockets trapped in the weld lead to weak and porous areas. Caused by inadequate shielding gas coverage or improper cleaning.
    • Lack of fusion: Insufficient bonding between weld metal and base metal due to low heat input or the use of incorrect welding techniques.
    • Incomplete penetration: Weak bond when the weld doesn't reach the joint's full thickness. Caused by insufficient welding current or improper preparation.
    • Cracks: Result from stress, improper cooling, or hydrogen embrittlement, compromising weld integrity.
    • Undercut: This defect appears as a groove or indentation along the edges of the weld. It can be caused by excessive welding current or improper manipulation of the electrode.

    To minimise defects, we follow proper procedures, use appropriate techniques, and ensure we are using skilled welders. Regular inspections and quality control are vital to maintaining structural integrity.