MTE Fire & Blast Systems have been independently type approved by Lloyd’s Register and DNV GL following witnessed testing in 2014 and 2015 at Exova Warrington ﬁre testing facility, UK.
Fire testing was conducted against IMO Resolution MSC.307 (88), Annex 1: Part 3 and ﬁre ratings of A0, A60, H0, H60 & H120, speciﬁed by Safety of Life at Sea (SOLAS), have been achieved.
Fire ratings are split into two main requirements, integrity and insulation performance. For all A rated ﬁres, integrity must be maintained for a minimum of 60 minutes and for all H rated ﬁres, a minimum of 120 minutes is required.
Jet ﬁre testing was conducted at DNV GL Spadeadam against ISO 22899-1 and a 120 minute jet-ﬁre rating has been achieved. Jet ﬁre is tested on integrity only, with no thermal requirement.
MTE blast wall design is produced via MTE software which comprises a computerised non-linear elasto- plastic equivalent single degree of freedom analysis based on “Introduction to structural dynamics” by John M Biggs, and observing recommendations set out in the SCI-P-112 “Interim Guidance Notes
for the Design and Protection of Topside Structures Against Explosion and Fire”, with reference to FABIG technical notes, most particularly technical note 5.
MTE has also carried out over 100 hydrocarbon explosion tests on various products and where appropriate, the collated data has been incorporated into our proprietary design software, veriﬁed by Lloyds Register.
The highly comprehensive software can be used to design any form of overpressure, pulse or shock wave type loading. Analysis will determine both deﬂection and reﬂection limits, allowing for optimised design.
Fire and Blast walls can generalised into two main types of system, Non-load bearing and stressed Skin.
Non-load bearing walls are designed solely against operational loads such as ﬁre, blast and environmental conditions. The design is chosen to any structural loads that would be transferred into.
Stressed skin walls are designed to withstand operational loads whilst providing structural support. The design removes the need for additional bracing which can minimise the required wall zone of the product.
There are many diﬀerent iterations of ﬁre and blast wall solutions which can be categorised as:
Deck to Deck
The traditional deck to deck system can be used in most applications and reduces the transfer of moment and reaction into structural steel. Deck to deck systems can typically be used in traditional platforms.
Overclad systems provide suitable protection for structural steel, removing the need for the application of PFP, signiﬁcantly lowering the cost of ﬁre protection. Overclad systems are typically used in Living Quarters design.
Post & Panel
The post & panel application uses horizontally spanning walls, connected to vertical posts. This system is suited for blast instances where both a large span and large blast load are required typically in process areas.
Welded or bolted connections can be designed and provided for various ﬁre and blast conditions, dependant on the loads involved.
Weight Saving and Optimised Solutions
For many years MTE have highlighted the beneﬁts of their prefabricated ﬁre and blast wall system.
In addition to the support oﬀered via design, engineering and site installation, the MTE solution oﬀers:
- Industry-leading weight savings
- Integrated penetration frames, including doors and removable panels
- No need for PFP to wall areas
- Minimal OPEX costs
MTE have selected a range of worldwide projects in harsh environments to act as case studies. The table below clearly highlights the significant weight saving benefits oﬀered by the MTE prefabricated fire and blast wall system compared to the traditional ﬂat plate (FP) system.
The project examples highlighted have either been fully designed and installed. Prefabricated walls in stainless steel require little or no maintenance during the design life of the platform.