Rail Welding

Expert Rail Welding for Long-Lasting Results

Speak to our experts about your next project

“We have both the capability and capacity to cater for large scale projects and have formed a reputation for delivering advanced-welding solutions at a highly competitive rates without compromising on quality.”

Karl Dean, Head of Welding

RSSI Welding has been providing a specialised and professional service to construction and rail/light rail industries for many years prior to Carillion Welding’s acquisition by RSS Infrastructure in 2019. Our division is based in Doncaster, with regional offices in Alnwick, Cwmbran, Romford, and Stoke-on-Trent.

Highly Skilled and Experienced Welders

We are committed to providing training and development opportunities for our employees, with Level 1-3 Stressing Officer competency training available. Our investment in staff training and development means that we can handle large-scale projects with fully qualified teams.

Delivering Welding Services Across the UK

RSSI Welding has a reputation for delivering advanced welding solutions competitively without compromising on quality, productivity or performance. We are already working with NWR depots across the UK, NWR works delivery West Midlands, Wales & West, Anglia & LNE North & South, Balfour Beaty, Colas Rail, Babcock Rail, Trackwork Ltd., Pod-Trak Volker Rail, Midland Metro and Story Rail.

Reputation For Excellence

The Welding division is proud of its record of high-performance rates, with 99% of all welds being approved the first time. Our senior management team has extensive experience, having been involved in delivering major UK projects. We are also corporate members of IORW, with long-standing relationships built on trust and honesty ensuring we are Network Rail’s longest serving welding sub-contractor.

Setting the Standards

RSSI’s Welding division holds ISO 9001, 14001, 45001, and Achilles certifications. Our welding processes & systems are TWI ISO 38:34 accredited. We offer comprehensive welding services from planning and scoping to project management, delivery, inspection & handback.

Investing In People & Equipment

Our welding teams are highly qualified with access to the latest equipment; we recently rolled out ROBEL 13:49 grinding machines in anticipation of new standards. This enables us to deliver a top-level service to all our clients, particularly Network Rail.

Contact Welding Division

For reliable project delivery, contact us today at 0330 113 0004. Led by Karl Dean, our experienced team of Welding experts are ready to assist.


Karl Dean

Head of Welding


Welding Services

  • All aspects of Aluminothermic Welding: RT 1-4
  • All aspects of TW 1-5A including extensive experience welding inner-city tram systems and crane rail
  • Aluminothermic weld inspection
  • Manual Metal Arc [MMA]: MMA 1-5
    Oxy/Acetylene and Oxy/Propane burning of rails and structures
  • RCF TR80 grinding teams with GSM’s
  • SO53/54 Switch & Crossing grinding and Inspection
  • VERSE Testing – a non-destructive system to measure the Stress-Free Temperature (SFT) of Continuously Welded Rail (CWR)

Frequently Asked Questions

RSSI Welding offers a range of welding services, including Aluminothermic Welding, Manual Metal Arc (MMA) welding, oxy/acetylene and oxy/propane burning of rails and structures, RCF TR80 grinding teams with GSMs, SO53/54 switch & crossing grinding and inspection, and VERSE testing.

Yes, RSSI Welding has both the capability and capacity to cater to large-scale projects and has a reputation for delivering advanced welding solutions at a highly competitive rate without compromising on quality. Their investment in staff training and development means they can handle large-scale projects with fully qualified teams.

RSSI’s Welding division holds ISO 9001, 14001, and 45001 certifications, as well as Achilles certifications. Their welding processes and systems are TWI ISO 38:34 accredited, demonstrating their commitment to delivering a high-quality service.


RSSI at CRSA Verse Testing

CRSA Verse Testing

“I highly recommend RSS Infrastructure (RSSI) for their exceptional work and professionalism during the renewals work on the HBS route.” Project Manager, CRSA Services Delivered

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RSSI Welding on MMA Westside Extension

MMA Westside Extension

“I highly recommend the team at RSS Infrastructure. They always deliver on time and to the required standard, and their site operatives are always professional

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L2C & K2C Renewal Works

L2C & K2C Renewal Works

“The collaboration between RSSI and Amey Rail Projects was aimed at ensuring the hand back package was fully compliant with Network Rail standards by completing

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