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Passive fireproofing – The safest option for any topside constructions

To maximize passive fireproofing approaches, we need to design a system for inside and outside structures. Not only should in-house forms be secured from fire hazards, but so should offshore areas.


There are active and passive techniques in the fireproofing protection system with unique characteristics and applications applied to various projects. Passive fireproofing protection, in particular, is regarded as a critical feature that all structures should include.


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Passive Fire Protection, also known as PFP, is an essential component for all fire prevention systems. This approach aims to minimize harmful impact not only on people’s safety but also on the quality of construction. 

PFP protects humans’ lives by restricting fire’s spread and giving enough time when any accidental fire occurs to handle situations and rescue people. Nowadays, PFP has become available for use in all structure types, including steel, concrete, and topside areas. Steel is one of the most used materials for construction at all levels, from hospitals and schools to modern malls where people are always crowded. , so fireproofing systems should play an important role in design and installation.

The offshore structure is a tightly populated structure that must execute its functions in small spaces. The topside structure, in particular, is made up of complex facilities and equipment for offshore processing that handle a considerable amount of explosive mixture. As a result, oil and gas leakage is a common occurrence that can swiftly escalate into a fire accident if a suitable mitigation technique is not implemented.


Topside offshore construction is a massive structure with well-drilling facilities for exploring, extracting, storing, and processing petroleum and natural gas found in rock formations beneath the seabed. These types of projects are sensitive to oxidation due to the various factors exposed to the structure.

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fireproofing - vivablast

Due to numerous constraints such as weight, height, topside structures cannot maintain sufficient margins. As a result, failure of the weakest member is easily possible when a fire event occurs, and the load initially carried by the fractured element should be transferred to the adjoining member. It is the continuous collapse caused by fire, which eventually leads to the ultimate defeat of the structure. Consequently, we all need to set up a fire protection system to maintain structural integrity against fire load.

Passive fireproofing protection is one of the most practical techniques to improve a structure’s fire resistance. PFP is generally thought to be more reliable than active systems, but it has significant limits. Because of its excellent efficiency and longevity, the epoxy-based intumescent coating is commonly employed for most offshore units.

In general, the process to apply PFP for both steel and offshore structures has a total of 4 following essential steps.

  • Step 1: Surface preparation
  • Step 2: Quality control for each item
  • Step 3: Process of spraying fireproofing paint
  • Step 4: Final check to ensure getting the best outcomes 

The standard for topside structure fireproofing procedures, and specific notes

When using PFP (son chong chay) for offshore constructions, we need to know that this approach is often applied on three sides of each member, excluding the top surface of the upper flange. However, the installation of a 3-sided PFP should be carefully considered in light of fire situations and structural member arrangements. 

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Therefore, in the case of fire above the deck, the structural part receives 4-sided heat input through direct or indirect exposure, and nothing can assure the applicability of 3-sided PFP. As a result, when the fully enveloping fire scenario is produced, the performance of 3-sides PFP for primary deck members is examined in this work.

Moreover, in the first step in the verification process, fire redundancy assessments with 4-sided PFP are performed to optimize the PFP arrangements on the deck structure. When the PFP application area is determined, all 4-sided PFP is replaced with 3-sided PFP, and the entire fire redundancy analysis process is restarted. The structural margin of the deck construction is also lowered as the strength of the top flange is dramatically reduced.

Passive fire protection is definitely the most effective method for saving and constructing a safe, efficient, and problem-solving system for not only the topside but also any form of structure. Thus, working with the more experienced the team is, the higher quality of fireproofing systems is. VIVABLAST is now one of the leading service providers in terms of establishing standard fire resistance for all structures. Moreover, VIVABLAST will support every step to bring the best protection for buildings at all levels with specialised technicians.

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