Pipeline Services
for the Commercial Sector

Specialised, non-intrusive solutions for uninterrupted commercial operations

In commercial construction and fit-out projects, system downtime can compromise more than just project timelines; it can impact tenant satisfaction, building operations, and handover schedules. From high-rise office buildings and prestigious financial institutions to media studios and national headquarters, uninterrupted building services are essential for maintaining occupancy and meeting project deadlines. That’s where Allied Pipefreezing Services (APS) comes in.

Our proven pipeline services methodology allow you to isolate and service pressurised systems without the need to drain or shut down entire networks, keeping your commercial building or project facility fully operational, compliant, and productive.

Common Challenges
in Commercial Facilities

Even routine maintenance becomes high risk in occupied commercial environments. Key challenges include:

No-Room-for-Error Downtime:

Shutting down systems can disrupt tenant operations, compromise building services, and delay critical project milestones for construction teams.

Occupied Building Requirements:

Working around live commercial spaces demands non-intrusive, quiet methods that protect business continuity and tenant comfort.

Project Timeline Pressure:

Every intervention must meet strict construction schedules whilst maintaining building services for existing occupants and new fit-out requirements.

Multi-System Complexity:

HVAC, domestic water, fire suppression, and chilled water systems are interlinked. One interruption can affect entire floors and compromise building operations.

Tenant Service Standards:

Maintenance work must not compromise the building’s ability to provide uninterrupted services to commercial tenants and visitors.

Our Solutions

Pipe Freezing

Create temporary, controlled ice plugs to isolate sections of pipeline – ideal for targeted repairs without full-system shutdowns.

No need to drain systems
Prevents service interruption
Suitable for occupied commercial environments

Hot Tapping

Add connections or valves to live systems without interrupting building services or tenant operations.

No shutdown required
Pressure-rated solutions
Minimal disruption to commercial activities

Line Stopping

Safely stop the flow in pressurised systems to allow repairs or modifications.

Enables sectioned-off work
Avoids full-facility impact
Works across multiple system types

Shrink Fitting

Use thermal contraction for precision pipe fitting, especially useful in high-spec installations like executive suites or media facilities.

Tight, leak-free seals
No adhesives or welding
Ideal for premium commercial spaces and sensitive areas

Where We Help

HVAC and Climate Control Systems

Maintain stable temperatures in office spaces, reception areas, and commercial zones while servicing heating and cooling lines, ensuring no disruption to tenant comfort or building operations.

Domestic Water Systems

Support uninterrupted access to water supplies for washrooms, kitchens, and commercial facilities. Our pipefreezing process protects essential building services during construction and maintenance.

Fire Suppression Systems

Carry out work on sprinkler mains and fire protection systems without affecting building safety or insurance compliance across the facility.

Chilled Water and Cooling Systems

Maintain cooling supply for IT systems, server rooms, and climate-controlled areas while staying fully compliant with building regulations.

Testimonials

Here are some of the nice things our clients say about our services.

We found the service to be invaluable. The time it took to complete the works was substantially less had a traditional shutdown be carried out. The need to continue supply to the critical wards was crucial. Other more traditional methods would not have been able to offer this benefit.

Why Commercial Clients Trust Allied Pipefreezing

We understand the critical nature of commercial building infrastructure. That’s why APS offers:

Our Solutions

AO Arena, Manchester

Durham University Hospital

Prestigious Serviced Offices, London

Certified to Work
in Commercial Environments

Our team brings extensive experience working with construction firms, mechanical contractors, and building managers. You can expect:

Full compliance with health and safety protocols and building regulations

24/7 emergency response options

Careful planning to avoid disruption to tenant operations and project schedules

Transparent communication with site teams and building management

Detailed documentation for handovers, compliance, and project records

Contact Allied Pipefreezing Today

Discuss how our specialised services can support your commercial facility, safely and efficiently.

0845 658 0425

info@alliedpipefreezing.co.uk

Frequently Asked Questions

Can pipe freezing be carried out in an occupied office building?

Yes. Pipe freezing is ideally suited to occupied commercial buildings because it is quiet, non-intrusive, and creates no disruption to building services beyond the targeted section of pipework. The process uses liquid nitrogen applied externally to the pipe to create a temporary ice plug, isolating a specific section while the rest of the system continues to operate. This means tenants can continue working, HVAC systems remain active in unaffected zones, and water services are maintained throughout the building. APS regularly carries out pipe freezing in occupied office buildings, financial institutions, media studios, and mixed-use developments across the UK and Europe.

Can you carry out pipe freezing during a live construction fit-out?

Yes. APS frequently works alongside main contractors, mechanical engineering firms, and fit-out companies on live construction projects. Pipe freezing allows existing building services to be modified, extended, or connected to new installations without requiring a full system drain-down or shutdown. This is particularly valuable during phased refurbishments, floor-by-floor fit-outs, and projects where the building must remain partially occupied during construction. Our team integrates into the project programme, schedules work around other trades, and provides all necessary documentation for project compliance, health and safety files, and building handover records.

Can pipe freezing be used on fire suppression and sprinkler systems?

Yes. Pipe freezing is a proven method for isolating sections of fire suppression and sprinkler systems — including wet risers, dry risers, and sprinkler mains — without draining the entire system. This is critical in commercial buildings where fire protection must remain operational across the majority of the building while localised modifications or repairs are carried out. The ice plug provides a reliable temporary isolation that holds under system pressure, allowing valve replacements, section repairs, or new sprinkler zone connections to be completed. APS has extensive experience working on fire protection systems in commercial buildings, ensuring that building insurance requirements and fire safety regulations are maintained throughout the work.

Do you offer pipe freezing services for high-rise commercial buildings?

Yes. APS provides pipe freezing, hot tapping, and line stopping services for high-rise commercial buildings of all sizes. High-rise buildings present specific challenges including: vertical pipe runs with significant head pressure, limited access in risers and plant rooms, multiple tenants affected by a single service run, and the need to maintain fire, water, and HVAC services across many floors simultaneously. APS engineers have experience working in high-rise environments and carry specialist equipment suited to confined and vertical access situations. We have completed projects in major commercial buildings across London, Manchester, Birmingham, and other UK cities, including the AO Arena in Manchester — a £50 million refurbishment where we carried out extensive line stopping and hot tapping while the venue remained operational.

How does hot tapping work on HVAC systems in commercial buildings?

Hot tapping (also known as under pressure drilling) allows new branch connections, valves, or instrumentation points to be added to live HVAC pipework, including heating, chilled water, and condenser water systems, without shutting down the system. The process involves attaching a new fitting and valve to the existing pipe, pressure testing the connection, and then drilling through the pipe wall under controlled conditions while the system remains pressurised and operational. This is particularly valuable during commercial fit-out and refurbishment projects where HVAC services must remain live for existing tenants while new zones or floors are being connected. APS has carried out hot tapping on HVAC systems in high-rise offices, shopping centres, data centres, and major commercial developments.

What is the noise and disruption level during pipe freezing in a commercial building?

Pipe freezing is one of the quietest pipeline isolation methods available. The process involves applying liquid nitrogen to the outside of the pipe — there is no drilling, hammering, welding, or heavy machinery involved during the freeze itself. The main sound is a gentle hissing as the liquid nitrogen is applied, which is comparable to background office noise. There is no vibration, no sparks, no open flames, and no dust or debris. This makes pipe freezing suitable for use in occupied offices, reception areas, retail environments, and other noise-sensitive commercial spaces. Where hot tapping or line stopping is also required as part of the project, these processes involve some drilling — but APS schedules this work to minimise disruption, including out-of-hours operations when needed.

How do you minimise disruption to tenants during pipeline maintenance?

APS takes a proactive approach to minimising tenant disruption on every commercial project. This starts with a thorough site survey and consultation with the building management team to understand tenant schedules, sensitive areas, and access restrictions. We then develop a detailed method statement that includes: planned work schedule (often outside core business hours), clear communication protocol for building managers and tenants, isolation strategy designed to affect the smallest possible area, and contingency planning for any unexpected issues. Our engineers are accustomed to working in occupied, high-profile commercial environments and maintain professional standards of conduct, cleanliness, and communication throughout. All work is completed with minimal footprint and full reinstatement of any affected areas.

What documentation do you provide for building compliance and project handover?

APS provides comprehensive project documentation for every commercial project, suitable for building compliance, CDM (Construction Design and Management) files, O&M (Operation and Maintenance) manuals, and project handover packs. This typically includes: pre-work site survey and risk assessment, detailed method statement, RAMS (Risk Assessment and Method Statement), gas safe purge certificates (where applicable), pressure test certificates, photographic records of the work, completion reports, and any relevant third-party test results such as ultrasonic thickness tests. All documentation is provided in both digital and hard copy format as required. This ensures building managers, main contractors, and compliance teams have a complete audit trail for every piece of work carried out.

Pipeline Services
for the Commercial Sector

Specialised, non-intrusive solutions for uninterrupted commercial operations

Common Challenges
in Commercial Facilities

Our Solutions

Pipe Freezing

Hot Tapping

Line Stopping

Shrink Fitting

Where We Help

Testimonials

Why Commercial Clients Trust Allied Pipefreezing

Continuous Operations

Tenant-Focused, Non-Intrusive Workflows

Nationwide Coverage

Schedule and Budget Conscious Methods

Comprehensive Documentation

Comprehensive Documentation