Picking the wrong contractor for a live pipeline job can be costly. Hot tapping is specialist work that requires trained engineers, proper equipment, and a clear safety plan. This guide gives you a practical checklist to use when comparing hot tapping contractors before you commit to anyone.
1. Check Their Accreditations
Any contractor working on pressurised pipelines in the UK must meet strict health and safety standards. The Health and Safety Executive (HSE) sets out the legal framework for pipeline work in the UK, covering safe working practices and risk management.
Ask about:
- Industry accreditations such as SafeContractor, CHAS, or Constructionline
- Coded welder qualifications
- Public liability and professional indemnity insurance
A reputable contractor will share this information without hesitation. If they cannot, move on.
2. Look at Their Experience
Hot tapping is a niche skill. General pipework experience is not the same thing. Look for a contractor with at least 10 years of hot tapping work across different sectors, pipe materials, and pressure ratings.
RDS Pipeline has been delivering hot tapping services for over 20 years, working across Essex and throughout the UK. That kind of track record matters when a job is complex or time-sensitive.
3. Ask If They Subcontract
Some contractors use their own engineers for every job. Others bring in third parties for the specialist parts. This matters because subcontracting can introduce inconsistency and make accountability unclear if something goes wrong.
Ask directly: “Is all the work carried out by your own team?” A straight answer tells you a lot.
4. Check Their Equipment Range
A contractor with limited or outdated equipment may not be able to handle your job safely. Make sure they can work on your specific pipe material.
Pipe Material |
Commonly Found In |
|---|---|
Carbon steel |
Oil, gas, industrial |
Stainless steel |
Food processing, clean steam |
Cast iron / Ductile iron |
Water utilities |
MDPE / Plastic |
Gas distribution, domestic |
Copper |
Domestic, commercial heating |
A broad equipment range also means the team can handle surprises on site, which matters on emergency jobs.
5. Ask About Their Risk Assessment Process
Before any hot tapping job starts, a full risk assessment must be carried out. It is a legal requirement for pressurised pipeline work.
A good contractor should be able to explain:
- How they assess pipe material, pressure, and fluid type beforehand
- What method statements they produce and how you receive them
- How they manage site-specific hazards
If they cannot explain this process clearly, do not hire them.
6. Ask for References and Past Work
Any reliable contractor will have completed projects they can point to. Ask for references from clients with similar project types, or browse RDS Pipeline’s case studies to see what a specialist contractor’s work looks like in practice.
The Bottom Line
Price matters, but it should not be the only factor. A cheaper quote from an inexperienced contractor can quickly lead to delays, rework, or worse.
The right contractor will answer your questions clearly, provide documentation without being chased, and give you a straight picture of what will happen on site.
To discuss a project or get expert advice, get in touch with RDS Pipeline. With over 20 years of experience and a fully in-house team, we work on projects of all sizes across the UK.
