1. What welding machine do I actually need for the job?
This is the most important question — and the one most suppliers answer too quickly.
The right machine depends on five factors: the materials you are welding (mild steel, stainless, aluminium, or dissimilar metals), the material thickness, the welding position (flat, vertical, overhead), the duty cycle required (how long the machine runs per hour under load), and whether you need a portable unit for site work or a fixed unit for workshop use.
For example, a mechanical contractor welding stainless steel pipework to ISO 3834 needs a pulse TIG welder with documented arc parameters — a standard MIG welder will not pass inspection on that job. An agricultural contractor maintaining a fleet of mild steel machinery needs a robust MIG welder with a high duty cycle and reliable wire feed — not a light-duty inverter built for occasional use.
Getting this wrong is expensive. A machine that cannot handle the duty cycle will fail under load. A machine without the right process capability will produce welds that fail inspection or, worse, fail in service.
KWS will ask you the right questions before recommending anything. If you can describe the job — the material, the thickness, and the volume of welding — we will specify the correct machine.
Call us on 056 772 9949 or email info@kws.ie before you buy.
2.What is the real difference between a budget welder and a professional machine — and is it worth paying more?
The honest answer: for occasional hobby use, a budget machine may be adequate. For professional or commercial use, it is almost always a false economy.
The differences that matter in a professional context are: duty cycle rating (a machine rated at 60% duty cycle at 200A will sustain production welding; a budget machine rated at 20% will overheat and cut out), arc stability (professional inverter machines like Fronius and Telwin maintain a stable arc across varying material conditions — budget machines do not), wire feed consistency (inconsistent wire feed causes porosity and weld defects), and after-sales support (if a professional machine goes down, KWS can diagnose, repair, and calibrate it; budget machines are often unserviceable).
There is also a compliance dimension. On regulated sites and in quality-managed environments, only supplies from recognised manufacturers with calibration certificates will be accepted. Fronius, Telwin, and Hypertherm meet this standard. Unknown brands may not.
The total cost calculation: a professional machine at €2,500 that lasts 10 years, with a service and calibration programme, costs less over its lifetime than three budget replacements at €800 each — with the added cost of downtime and failed welds factored in.
3. Do you provide calibration certificates, and what do I need them for?
Yes. KWS provides calibration services and issues calibration certificates for welding machines.
Calibration certificates are required in the following situations: working to ISO 3834 (fusion welding quality requirements), working on public sector or EU-funded construction projects, working in pharmaceutical, food, or medical manufacturing environments, and passing third-party quality audits.
A calibration certificate documents that your welding machine is producing the voltage, current, and wire feed speed it claims to produce — within a defined tolerance. Without this documentation, your weld quality cannot be independently verified, and your supplies may be rejected on site.
We also issue the associated documentation in a format accepted by ISO auditors and site quality managers.
If you are tendering for work that requires weld procedure qualification records (WPQRs) or welder qualification records (WQRs), calibrated supplies is a prerequisite. Talk to us before you tender — not after you have won the tender.
View Calibration Services →
4. Can you supply the documentation I need to pass a site inspection or win a tender?
Yes — this is a core part of what KWS provides, not an afterthought.
KWS maintains test certificates and technical data sheets for the products we supply. These cover material certifications, supplies performance specifications, and manufacturer compliance documentation. For calibration, we issue formal calibration certificates in the format required by ISO and site quality managers.
For contractors building tender submissions, KWS can provide: product data sheets confirming technical specifications, material test certificates for welding consumables, calibration certificates for welding equipment, and brand authorisation documentation confirming KWS as an authorised Irish distributor.
If you are working on a project with specific documentation requirements — SEAI grant compliance, public works contracts, ISO-regulated manufacturing — tell us at the outset. We will ensure the paperwork is in order before the supplies arrives on site.
Access Test Certs and Data Sheets →
5.How quickly can you get me parts or supplies in an emergency?
For stocked items — which covers the majority of our consumables, wire, electrodes, PPE, and spare parts for the brands we carry — same-day collection is available from our Kilkenny and Portlaoise trade counters.
If you need something urgently that is not in stock, we will tell you immediately — not after 24 hours — and give you a realistic lead time. We do not take orders we cannot fulfil.
For agricultural contractors during silage or harvest season, and for construction firms mid-project, we understand that a one-day delay is not a minor inconvenience — it is a direct financial loss. Our stock policy is built around that reality. We hold deep stock on the consumables and spare parts that Irish industry actually uses at volume.
Click and Collect is free from both locations. Free delivery applies to orders over €75 ex VAT.
If you are a regular KWS customer with a business account, call us directly — we prioritise account holders on emergency requirements.
View Delivery and Collection →
Have a question not covered here? Call us on 056 772 9949 or email info@kws.iee →
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