Capital Goods Industry

Our know-how related with structural integrity and the improvement of mechanical properties of components and welded joints, in addition to the knowledge of the most innovative analysis techniques, help our customers to increment the quality, reliability and competitiveness of their capital goods.

We solve critical problems which can arise during either manufacturing or service, saving time and costs.

Services for capital goods industry

Failure analysis

Study of components and welded joints to determine the cause of their failure during manufacturing or in-service life.

We offer as well the rigorous analysis of redesigns or improvement treatments to maximize the quality, avoiding the failure to occur again.

Possibility of designing inspection plans to ensure the structural integrity of components similar to that presents the failure.


Metallurgical analysis

Preparation of samples on-site or in laboratory and subsequent analysis and interpretation of the microstructure. We are able to detect metallurgical risks (brittle phases, softening, cold cracking, etc.), stages of deterioration, etc.

If necessary, we offer studies of local or global treatments to modify the microstructure to obtain an optimal in-service response.

Possibility of performing metallurgical and mechanical reverse engineering studies to determine the WPS with which a component has been welded.

Prediction of metallurgical phases and mechanical properties by numerical simulation of the essential WPS variables.

Micrografía KHISGROUP

Improvement in the fatigue life of components and welds

We offer the increase of the service life of all type of equipment, multiplying the original life by factors of up to 2.25.

We have the latest techniques, knowledge and equipment to perform fatigue life improvement treatments that can be applied under different codes and recommendations, such as ASME Sec. VIII (pressure vessels) or DNVGL-RP-C203 (offshore structures).

We also offer improvement and optimization of detail categories, from the definition of the manufacturing process to the design and application of subsequent treatments.

Solutions for life extension are applicable to in-service equipment, but also to equipment in phase of design or manufacture.

Results guaranteed by experimental tests.


Defects containment

According to the quality requirements of the customer, we develop palliative methods, using techniques of containment of both lineal and non-lineal defects, which are usual detected by NDTs.

This way, non-quality costs can be reduced and reprocesses can be eliminated, guaranteeing at the same time the product quality.

NDT Ultrasonic

Advanced quality control

We offer advanced support for quality control, evaluation of degrees of deterioration and even the determination of mechanical properties of in-service components, which have already consumed part of their service life.

We have developed an exclusive technique that allows to map the mechanical properties of welded joints, even along all the sub-zones of the HAZ, ensuring the excellence of quality and providing qualitative evidence to the customer, even in hydrogen aggressive environments.

Our techniques also entails significant time and cost savings when quality between different materials or manufacturing processes have to be compared.

Implementation and evaluation of all types of NDTs, as well as advice to launch inspection campaigns.


Design of inspection plans

Design of inspection plans according to criteria of maximum exigency in the assurance of the structural integrity.

The plan is designed based on an advanced knowledge of the newer inspection and monitoring technologies available in the market, and it is carried out turnkey guaranteeing the quality of the samples obtained in the field and evaluating them by our highly experienced and qualified stuff.

We offer rigorous analysis of the results obtained through advanced fracture mechanics methods to design preventive or corrective actions.


Design of welding tools and provisional elements

Design of specific tools for welding in light precision, medium and heavy boiler maker.

We employed innovative tools, where the manufacturing process and the welded references are simulated, controlling and optimizing the stress and strain states of the welded components.

khisgroup welding-1280

Design and validation of welded joints by means of innovative techniques

By using a combination of advanced and exclusive techniques of numerical simulation of welding processes, we design the parameters and we create welding modes to maximize the welded joint quality.

We validate these designs by means of exclusive micro analysis techniques of the welded joint and every sub-region of the HAZ, giving to the customer evidences of the excellent quality of our designs.

Moreover, we design both mechanical and heat prewelding and postwelding treatments, which can maximize even more the quality of the weld. For example, we minimize the effect of unfavorable residual stresses, eliminate the delayed cold cracking due to the hydrogen diffusivity, avoid hot cracking, decarburization, pitting, corrosion…


Hydrogen embrittlement and cold cracking

We have innovative techniques to analyse the phenomenon of hydrogen embrittlement by using very small samples of material.

This way, we obtain quickly and economically the response of our customers’ products to this phenomenon, even being able to analyse at a microdetailed level the mechanical behaviour of the heat affected zones of welded joints.

Experience in all types of cold cracking tests, including the measurement of diffusible and residual hydrogen.

Hydrogen Induced Cracks

Development of R&D lines and projects

As a spin-off of the University of Oviedo, the R&D is in our DNA, and always with a strong industrial component for the improvement of materials and processes, quality and cost reduction.

Do not hesitate to contact us to ask about your idea. In addition to our own laboratories, we have the knowledge and the best collaborators to carry out the most ambitious lines of research.

We are an Innovative SME Technology Based, being able to apply for different regional, national and European funding sources.

Thickness optimization

We optimize the thicknesses to the maximum in the design phase, saving important manufacturing costs and reducing the weight of the equipment.

We rely on the latest technologies and our own developments and knowledge to offer solutions that guarantee safety.


Optimization of welding sequences

We optimize welding sequences using exclusive numerical techniques.

We correlate the simulation results with experimental data of laboratory-welded coupons.

This way, we obtain and validate the best welding sequences guaranteeing minimum cost, maximum quality and design requirements.

know-how innovative solutions - weld simulation

Numerical simulation (Finite Element Analysis)

Experience in the simulation of all types of industrial processes, including welding, heat treatments, forming and surface treatments.

Numerical models are validated by means of advanced experimental techniques, developed and tested in an industrial context, increasing the reliability of the simulations.

Our simulation services allow our customers to reduce both launching times and manufacturing costs and to eliminate unexpected non-quality costs.

All type of structural numerical simulation is also offered, including fatigue calculations, optimization of geometries, materials and thicknesses, etc.

We use high quality commercial simulation tools, but also subroutines and exclusive software developed by our spin-off.


Solution to problems during design, manufacturing or in-service life

We support Engineering (design/services), Manufacturers and End Users of capital goods to solve any kind of problem related to structural integrity.

We offer both preventive and palliative solutions (repairs) for any type of problem or defect, improving the quality and durability of the constructions.

Evaluation, control and reduction of residual stresses

We evaluate experimentally and simulate with high precision the residual stresses induced by the manufacturing process.

If necessary, we propose solutions for its relaxation and improve reliability (stress relief by vibrations, prewelding and postwelding heat treatments, soakings, etc.).

residual stress khisgroup

Improvement of welded joints and components

Our advanced industrial knowledge of welding and its processes, prewelding, postwelding, heat treatments, mechanical treatments and surface treatments allow us to help our clients for the most suitable setup of their variables, optimizing the quality and the mechanical behavior of components and welds.

We quantify our improvements by means of innovative experimental techniques, as well as numerical simulations, validated in the most recent industrial R&D projects.

We have the suitable partners for providing the treatments we design, offering a global solution to our customers.