Cable Transits

A60 H120 Pipework Fire Protection For Offshore Bulkheads & Decks

A60 Sealing

• uploaded by - Chris Dodds Thorne & Derrick Sales & Marketing Manager

NOFIRNO

Sealing Cables & Pipes Offshore

A flexible pipe penetration sealing system, using NOFIRNO, for single or multiple metallic and GRP pipe applications, providing fire protection in A60 to H120 and uninsulated A0 and H0 bulkheads and decks. The NOFIRNO sealing system will reduce vibration, stress and cathodic corrosion and is age tested to prove 50 years of cable and pipe sealing protection.

NOFIRNO is also proven to provide a blast rating and fire protection during a 2 hour jet fire test and will ensure watertight integrity even after exposure to a 1 hour (A60) fire.

NOFIRNO Flexible Pipe Sealing System is one of the most adaptive systems for sealing straight and angled pipe penetrations and can even accommodate multiple pipe runs. The system is designed to maintain the safety of vessels providing fire protection and ensuring bulkheads and decks remain gas and watertight when pipes need to pass through them. It consists of only two components: NOFIRNO sealant; a silicone based fire resistant, water repellent sealant and NOFIRNO multi-filler sleeves, supplied in bonded strips to make the system easy to install.

NOFIRNO – A Brand of CSD Sealing Systems | Distributed by Thorne & Derrick

A60 H120 Fire Resistance

Some Technical Guidance

The NOFIRNO system from CSD Sealing Systems is tested against fire resistance to both A (A60) and H (H120) Classification – the temperature regime in the furnace during an A-Class fire is similar to that of a cellulose fire and during an H-Class fire similar to that of an oil fire. In a H-Class fire the increase in temperature is much faster than that of an A-Class fire. The cable penetration must be tested both Vertically and Horizontally in order to be approved for general usage by the leading certifying authorities.

Fire Protection Integrity

The integrity of the cable penetration must be maintained throughout the test period (A60 A-Class 60 Minutes, H120 H-Class 120 Minutes) – the occurrence of flaming on the unexposed face or ignition of a cotton wool pad applied to any gap or fissure that appears in the test specimen constitutes a loss of integrity.

Insulation

The limit of temperature increase on the non fire side of the penetration is stipulated in EN 1366-3 or IMO A754(18). The maximum acceptable temperature increase at any point on the penetration during the test is 180 °C. An approved fire test gives the penetration a classification where the fire is specified (A-H-Class Fire) and the time for which the penetration was able to resist the fire in respect of the maximum allowed temperature increase on the non fire side of the penetration (180°C).

For example, a penetration that withstands an H-Class fire for 120 minutes is classed as H120 and a penetration that withstands an A-Class fire for 60 minutes is classed A60.

Fire Classes

If the 180 °C temperature increase is not exceeded during the stipulated time the penetration is approved and can be classified.

* A0 and H0 relates to no temperature restriction on the non-fire side. H0-400 °C relates to a restriction of 400°C maximum temperature increase on the non-fire side. A0-H0 and H0-400 °C must also meet the division integrity requirements, not allowing cracks or opening to develop through which flames or hot gasses can pass.

A60 & H120 Fire Rating

NOFIRNO is for A0 – A60, H0 – H120, Jet Fire, Blast, Watertight & Gastight ratings:

• Simplified design through standardisation of all bulkhead penetrations and a significant reduction in components
• Allows design changes without the need for additional hotwork
• Space reduction
• Faster installation
• Allows for misalignment of pipe work due to build tolerances
• Significant reduction in number of pipe spools
• Vibration stress and cathodic corrosion reduced increasing the life of pipe systems and reducing the failure rate
• Easy replacement of pipe systems
• Vibration & noise reduction – reducing noise signature
• Significant weight saving over bulkhead fittings making more energy efficient

Jet Fire Testing

➡ NOFIRNO – Jet Fire Testing For Cable Duct & Pipe Penetration Sealing Systems

Fire Performance A60

• Certified for use in A60 boundaries (A60 – min length 180mm), tested & approved without any insulation for A0 applications, (A0 – min length 250mm)
• Proven watertight even after A60 fire test
• 2 hour hydrocarbon fire test – both with and without insulation, rated H0 and H120
• 2 hour Jet Fire test – with no additional insulation
• Shock tested to 850g to DEF STAN 08-120 including post test pressure test to 6.9 bar
• Blast rated sealing system
• Low Smoke and Toxicity – DEF STAN 02-711 and DEF STAN 02-713

NOFIRNO is for A0 – A60, H0 – H120, Jet Fire, Blast, Watertight & Gastight Ratings. INSTALLATION GUIDE.

NOFIRNO

Some further benefits of the sealing system include:

• Ensuring ATEX, DSEAR & WIMES compliance
• Age tested to prove 50 years of sealing protection
• Quick and easy to install in both horizontal and vertical cable ducts
• Easy re-entry for adding, removing or replacing cables LV MV HV
• Installed in any sized or shaped opening, penetration or duct
• Resistant to submersion in petrol and diesel
• Resistant to methane, hydrogen sulphide and chlorine
• Suitable for trefoil and large diameter 11kV/33kV power cables
• Prevents rat and rodent ingress into low, medium and high voltage substations

➡ Read More: NOFIRNO – Sealing Systems Explosive Environment Sealing Systems For Hazardous Areas (ATEX Directive) Sealing Systems

➡ Contact Thorne & Derrick to discuss the NOFIRNO Duct Seal System – 0191 4104292.

Sealing Pipes, Cables & Ducts Using NORFIRNO

Watertight & Gastight Sealing For Building Entries & Cable Duct Terminations

A simple and long term solution designed for sealing cable ducts and building entries against ingress of water, gas or flooding – the NOFIRNO system is used extensively across the utilities and construction sectors to protect LV MV HV electrical substations, equipment rooms and cabinets, wind turbines and critical infrastructure.

Some site installation photographs of NOFIRNO  ➡ 

Marine & Offshore Power

Cable Accessories

THORNE & DERRICK are international distributors of LV, MV & HV Offshore & Marine Cable Installation, Jointing, Substation, Earthing & Electrical Equipment – we supply Joints, Glands, Cleats & Cable Accessories specified for use in harsh and hazardous areas to support the installation of marine and offshore power cables.

Since 1985, T&D have established an international reputation based on SERVICE | INTEGRITY | TRUST.

CMP Cable Glands | 3M Scotchcast Joints | Ellis Patents Cable Cleats

DNV

DNV is a rigorous approval system for cable accessories including joints, glands and cleats – the DNV approval process assesses all of the evidence offered by the manufacturer and compares it to the requirements of the international standard, IEC61914. Once full compliance is proven DNV Type Approval is offered.

Cable Joints

DNV Approved

Hydrocarbon Resistant | Zero Halogen & Fire Resistant

Cable Glands

Hazardous Area Explosion Proof | Zero Halogen

Cable Cleats

Zero Halogen | Fire Resistant | Stainless Steel

Also ➡ Cable Labels, Cable Ties, Cable Transits and Cold Shrink

Contact Thorne & Derrick for further information and customer service – extensive range of DNV Approved Marine & Offshore Cables & Cable Accessories available for delivery to UK and international projects.

LV MV HV – 3.3kV 6.6kV 11kV 33kV

More IEC Offshore & Marine Cables

1. 1. Instrumentation Cables
   2. EMC & VFD Cables
   3. Heat Resistant Cables
   4. Fire Resistant Cables
   5. Fire & Water Resistant Cables
   6. Lightweight Cables 

T&D ⇒ CABLE ♦ JOINT ♦ TERMINATE ♦ CONNECT ♦ GLAND ♦ CLEAT ♦ CRIMP ♦ DUCT ♦ SEAL ♦ REPAIR 

Invitation

Thorne & Derrick invite you to join LinkedIn’s largest LV-HV Electrical Discussion Group : Low & High Voltage Power, Cabling, Jointing & Electricals. Discussion subjects include cable installations, cable jointing, substation, overhead line and electrical construction at MV, HV, 11kV, 33kV and EHV. Network, engage and promote your profile, company or products with over 10,000 influencers.

Roxtec Cable Seals – Sealing Cable Ducts In Substations Under Running Water Conditions (VIDEO)

Sealing Cables

• uploaded by Chris Dodds | Thorne & Derrick Sales Marketing Manager
  Author | Gavin Cornall from Roxtec 

Gavin Cornall (Roxtec)

Roxtec are the world leading manufacturer of cable and pipe sealing transits to protect against water ingress, gas migration and fire spread.

The following article by Gavin Cornall (Global Sub-Segment Manager T&D at Roxtec UK & Ireland) discusses cable sealing applications during running water or “flood” conditions.

Firstly, running water presents a major sealing issue for the installation of mastic type seals, curing and drying is almost impossible. This can place “stress and strain” on work programme completion times, especially approaching handover phase.

Secondly, this applies to any solution used to seal large power cables whether in a one cable, one duct format or passing in a trefoil formation through a larger duct. Such as 11kV and 33kV power power cables feeding MV substations.

The ability of the cable seal to provide reliable operation under high water pressure is essential – the flexibility of the cable seal to be installed during running water conditions is equally crucial.

Roxtec have inspected many seals where over time the cable has caused the sealant to rip or pull out of the substation wall.

Roxtec have also seen due to the weight and orientation of the cables, its almost impossible for the installer to space the cables to get sufficient coverage of compound around the cables to maintain a seal.

Roxtec Cable Transits provide effective protection to LV HV substation cables against flood damage and water penetration be it in dry or wet conditions.

In the Whitepaper we commissioned from EA Technology on Humidity Effects In Substations, I was pleased to see the emphasis on cable retention, both in normal and fault conditions.

It highlighted what I already thought, which is that without the ability to retain, the cable seal will fail over time.

The cable seal may fail on day 1 or year 1 but ultimately it will fail over time.

Cable Sealing – Key Considerations

I would ask the following questions when evaluating cable sealing technology options from either a design, specification or installation perspective.

1) Can it be installed in “running water conditions” – if yes, look a little deeper into what that actually means.

• Do you have to buy additional cable seals so you can install on both sides of the wall?
• Do you have to follow a special methodology which is more onerous than the normal installation?
• Is the installation sealed instantly or is there a drying or curing time? Is this still dependant on staying dry for an extended period?

2) Can the cable sealing solution cope with the weight and flex in operation?

• I would always ask what is the pull out force needed to pull out the cable from the cable seal or sealant?
• If that retention is based on unistrut or clamps on racking it won’t work as the cable will still move in operation at its point of seal.

Roxtec UG Cable Seal

Advanced Specification Sealing For MV Substation Cable Ducts

When Roxtec developed the UG range, we had a very specific set of tests in mind given our understanding of these 2 issues. We developed a cable seal that was even better than our blue rubber on constant pressure. We quickly realised it could be installed on running water just like its blue cousin, the Roxtec Multidiameter cable seal module.

But most importantly, Roxtec developed specific testing for cable retention and flex.

Roxtec UG Substation Cable Seals

We wanted to show Roxtec cable sealing solutions could maintain their seal, whilst the cables were pulled, bent and twisted, beyond the maximum bend radius of the cable.

All this whilst we cycled the temperature between +4ºC to +40ºC.

Needless to say it not only worked but it went beyond our expectations.

Our Roxtec H3 200 seal in fact had in excess of 3300nm put on it without failure, that’s over 336 kgs of pull out force!

So in conclusion, I would say if you only take one thing away from reading this article it is always consider: 1) Running Water Installation 2) Cable Retention Performance

Tweets by RoxtecLtd

THORNE & DERRICK SPECIALIST ELECTRICAL DISTRIBUTOR

LV ♦ MV ♦ HV

T&D distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Pulling & Installation Equipment – we service UK and international clients working on underground cables, overhead lines, substations and electrical construction at LV, 11kV, 33kV and EHV transmission and distribution voltages.

• Key Products: MV-HV Cable Joints & Terminations, Cable Cleats, Duct Seals, Cable Transits, Underground Cable Protection, Cable Jointing Tools, Feeder Pillars, Cable Ducting, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Protection & Fusegear.

• Distributors for: 3M, ABB, Alroc, Band-It, Catu, Cembre, Centriforce, CMP, Elastimold, Ellis Patents, Emtelle, Furse, Lucy Zodion, Nexans Euromold, Pfisterer, Polypipe, Prysmian, Roxtec.

LV – Low Voltage Cable Joints, Glands, Cleats, Lugs & Accessories (1000 Volts)

MV HV – Medium & High Voltage Cable Joints, Terminations & Connectors (11kV 33kV EHV)

Cable Laying – Underground Cable Covers, Ducting, Seals & Cable Pulling Equipment

T&D, CATU Electrical Safety & Arc Flash Protection Specialists for SAP’s, Linesmen, Jointers & Electrical Engineers – Largest UK Stockist

INVITATION

Thorne & Derrick invite you to join LinkedIn’s largest LV-HV Electrical Discussion Group : Low & High Voltage Power, Cabling, Jointing & Electricals. Discussion subjects include cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV. Network, engage and promote your profile, company or products with over 10,000 influencers.