When flames rise and smoke fills the air, the holes and gaps inside buildings and facilities often become life-threatening passages. How to effectively seal penetrations and prevent the spread of fire and toxic smoke is the core challenge of fire safety. TST seal cable and pipe penetration sealing system, with its excellent performance that meets a series of global top fire protection standards such as A-0, A-60, GB23864-3h, EN45545-2-HL3, E60-E150, has given a resounding answer. This is not just a string of professional codes, but also a solemn commitment to the “highest level of safety”. Today, let us deeply interpret the meaning behind these certifications and explore how fire blocking systems can build an indestructible life defense line.

Fireproof certification

The “Grand Slam” of the world’s top standards, strength builds trust

The certifications won by the TST seal modular sealing system can be called the “crown jewel” in the field of fireproof sealing, covering the most stringent requirements in core areas such as ships, buildings, rail transit, power communications, etc.:

The “safety golden bell” in the field of marine engineering

A-0, A-60

Class A standard (SOLAS Convention): This is a mandatory requirement of the International Maritime Organization (IMO) for ship fire separation. A-0 is the basic threshold, ensuring the basic fire integrity of the bulkhead/deck penetration. And A-60 is one of the highest levels, which means that the system can:

Prevent flames and smoke from penetrating for at least 60 minutes in the standard fire resistance test!

The average temperature rise of the back-fire surface of the system does not exceed 140°C, and the maximum temperature rise of a single point does not exceed 180°C (effectively protecting personnel and equipment in adjacent cabins).

The “3-hour fortress” of fire protection in Chinese buildings

GB23864-3h

The Chinese national standard “Fireproof Sealing Materials” (GB 23864) is the core basis for fire protection throughout the construction field. 3h is one of the highest fire resistance levels under this standard. It requires the system to:

In a standard test furnace simulating a real fire, it can maintain fire resistance integrity (no flame penetration) and fire insulation (back-fire surface temperature control meets the standard) for 3 hours (180 minutes).

This indicates that the TST seal fire penetration device fully meets China’s highest fire blocking requirements for lifeline projects and crowded places such as super-high-rise buildings, large transportation hubs (airports, high-speed railway stations), nuclear power plants, data centers, hospitals, urban pipe corridors, subway tunnels, etc., and wins precious rescue and evacuation time for building structures in fires.

European rail safety “highest risk pass”

EN 45545-2-HL3

EN 45545 is the EU’s unified standard for rail vehicle fire safety, and its stringency is world-renowned. HL3 stands for the highest hazard level (Hazard Level 3), which is suitable for the most severe operating environment and the most difficult evacuation scenarios, such as long-distance underground tunnel subways, high-speed trains, etc.

This standard not only tests fire resistance (R), but also extremely strictly limits the material in a fire:

Smoke toxicity (S): minimize the release of toxic gases to protect escapees.

Smoke density (SR): ensure that escape is still possible in low visibility.

Burning dripping (D): prevent molten materials from igniting other objects or burning people.

Meeting EN 45545-2-HL3 proves that the penetration seal module provides high-strength fire protection while its material behavior in fire has reached the safest and most environmentally friendly level. It is a necessary qualification for entering the European and global high-end rail transit market.

“Lifeline Guardian” of Critical Power Communications

E60, E120, E150

These certifications are usually based on the International Electrotechnical Commission IEC standards (such as IEC 60331-23, etc.), and are specifically tested for the fire resistance of cable penetrations.

E60/E120/E150 respectively represent that the system can ensure the penetration of cables in a fire:

Maintain circuit integrity for 60/120/150 minutes! (That is, the cable can still remain energized in the flames, providing continuous power for emergency lighting, fire pumps, alarm systems, and communication equipment).

Maintain fire resistance integrity for 60/120/150 minutes! (Prevent the spread of flames along the cable bundle).

Reaching the E150 level means that the MCT system can provide a “golden rescue power supply window” of up to two and a half hours for key cable lines in power plants, chemical plants, data centers, communication core rooms, traffic control centers and other places, ensuring the continuous operation of core facilities in disasters. Its significance is self-evident.

The scarcity of “full slam” of top certifications in four major fields

Through cross-comparison [China Fire Products Information Network], [CCS (China Classification Society) Certification Database], [EN45545 EU Notified Body List] and third-party testing agencies (such as Changzhou Fireproof Materials Testing Center) public data:

The only domestic company that holds the following certifications at the same time is TST seal:

GB23864-3h (highest in the construction field)

A-60 (top in the ship field)

EN45545-2-HL3 (highest risk level in rail transit in the EU)

E150 (IEC 60331) (top international level in the power field)

Authoritative data support

National Fireproof Building Materials Quality Inspection Center:

“Currently, there are 8 modular sealing system manufacturers with GB23864-3h certification, of which only 1 holds EN45545-HL3 certification at the same time.” (Source: 2024 “China Fire Sealing Technology White Paper”)

EU Railway agency (ERA) database:

Query EN45545-2-HL3 certified companies:

There are only 3 Chinese local companies (including TST seal), and the other two focus on rail transit vehicle interior parts, without high-level certification for ships/construction.

According to the existing public certification information and industry database comparison, TST seal is currently the only MCT sealing system supplier in China that has obtained the current highest level of certification in the four high-threshold fields of ships (A-60), buildings (GB23864-3h), rail transit (EN45545-2-HL3), and electricity (E150). Although international brands have the same certification, their products have not been localized; domestic competitors have not yet broken through the technical barriers in all fields.

Excellent performance

The “all-round guard” crossing the line of fire

It is no coincidence that it can conquer so many and top fire protection standards at the same time. TST seal cable and pipe penetration sealing system must have the following extraordinary performance:

1 Indestructible fire barrier

Under extreme high temperature (up to 1000°C or more) and direct impact of flames, the system can maintain structural stability for a long time, effectively block holes, prevent the penetration and spread of flames and high-temperature smoke, and control the fire in local areas.

2 Excellent thermal insulation protection

Significantly reduce the temperature of the back-fire surface (meet the temperature rise requirements of A-60, GB23864, etc.), protect the structural integrity of the area not directly affected by the fire, equipment safety and most importantly – the escape route for personnel.

3 Extraordinary sealing and adaptability

It can tightly fill penetration holes of various shapes and sizes (pipes, cable bundles, air ducts, etc.), adapt to substrates of different materials (concrete, steel plates, etc.), and have excellent seismic, pressure and weather resistance to ensure long-term effectiveness.

4 Intelligent protection of lifeline

Provide special optimization for cable penetration, maintain the functions of key power and signal lines to the greatest extent in the fire (Class E standard), and provide vital support for emergency response and personnel evacuation.

5 Environmental protection and low hazard

Especially in rail transit applications (EN45545 HL3), the smoke generated by the system materials in a fire is extremely low in toxicity, with little smoke and no dangerous drops, which greatly increases the chances of survival of trapped people.

Application scenarios

Guarding the “safety lifeline” of core areas

With such a top-level certified TST seal fire penetration device, its application value covers many fields with extreme requirements for fire safety:

High-end ships and marine engineering

Engine walls, fireproof bulkheads, deck penetrations, and pipeline seals for passenger ships, cruise ships, liquefied gas ships, tankers, drilling platforms, etc.

Major national infrastructure

Nuclear power plant conventional island and nuclear island, large hydropower station, ultra-high voltage substation, national/regional data center, communication core hub.

Lifeline transportation engineering

Metro/light rail tunnels (especially long tunnels), high-speed rail stations/airport terminals, urban underground integrated pipeline corridors, and cross-sea bridges.

Super high and special buildings

Super high-rise office buildings/hotels, large hospitals (operating rooms, ICU), museums, archives, large commercial complexes.

High-risk industrial facilities

Petrochemical bases, pharmaceutical plants, large warehouses (especially high-value or dangerous goods storage).

Why choose TST seal

The value behind the top certification

Absolute safety guarantee

Multiple global highest standard certifications are the hard power that has been rigorously tested and verified by international authoritative laboratories (such as DNV GL, UL, LPCB, China National Fireproof Building Materials Inspection Center, etc.), providing the highest level of life and property protection.

Global access

Covering SOLAS, Chinese national standards, European standards, and IEC standards, meeting the access requirements of major global markets, providing solid guarantees for project compliance, especially suitable for participating in international projects.

One-stop solution

A set of sealing module systems can meet the top fire protection needs in multiple fields such as ships, buildings, and rail transit, simplify design selection, and reduce the complexity of supply chain management.

Reliability and durability

The top certification requires the system to withstand multiple tests such as high temperature, mechanical impact, and water spray in fire simulation, which means that it has extremely high reliability and long-term stability in actual use.

Brand strength and reputation

The ability to obtain such a wide range of high-level certifications is a strong proof that TST seal has reached international leading levels in R&D investment, material science, production technology and quality management system.