IMO Resolution A.754(18) Fire Resistance Tests Fire Safety ...

Transcription

1 IMO Resolution A.754(18) Fire Resistance Tests Fire Safety Onboard Ships BY Hans van de Weijgert MSc MIFireE MBEng Senior Consultant INTERNATIONAL FIRE CONSULTANTS LTD 20 Park Street Princes Risborough Buckinghamshire HP27 9AH - UK Tel: + 44 (0) Fax: + 44(0)

2 Fire is all around Düsseldorf Airport (Germany) King s Cross Underground (UK) Tunnel Fires Gotthard Alpine Tunnel Mont Blanc Tunnel Channel Tunnel Piper Alpha Campos Basin Shipping Fires Limburg Scandinavian Star Diamond Princess

3 Objective of IMO Resolution A.754(18) Test method for the determination of the fire resistance of separating constructions Steel Bulkheads Steel Decks Separating constructions Steel Divisions, special functions Water tight Flame integrity

4 Design Criteria Classification A Class B Class C Class Allowable Temperature Rise (unexposed side) Average, T av = 140 C Maximum, T max = 180 C Insulation Classification A-60, A-30, A-15, A-0 (Steel) B-30, B-15, B-0 F-30, F-15, F-0

5 Test Specimen Size Minimum Dimensions are: (length Width) Steel Decks (Height Width) Steel Bulkheads

6 The Test Specimen Before Heating

7 Design Consideration Steel Deck or Bulkhead (Orientation of the division) Fire resistance requirement, A0 A60 Dimensions of the conduit sleeve Material Diameter Wall Thickness of pipe Insulation: type, thickness, length Division Pipe Conduit Sleeve

8 Tricks to Enhance Fire Performance A barrier/plug inside of pipe

9 LEGEND LOCATION OF THERMOCOUPLES 1(5) 25 EXPOSED 25 1(5) 3(7) Open Blanked Off 4(8) 2(6) EXPOSED Position of the plug in the pipe

10 Tricks to Enhance Fire Performance Thicker Insulation on the division Fully insulated exposed pipe ends

11 LEGEND LOCATION OF THERMOCOUPLES 1(5) 25 EXPOSED 25 1(5) 3(7) Open Blanked Off 4(8) 500 2(6) EXPOSED Pipe penetration in accordance with IMO resolution A 754 (18)

12 Tricks to Enhance Fire Performance Non-rigid steel support construction for pipes

13 The Test Specimen During Heating Without rigid pipe supports. (pipe supports not strong enough)

14 The Test Specimen During Heating With fixings in accordance with IMO A 754 (18) for pipe support.

15 Tricks to Enhance Fire Performance Increasing the length of conduit sleeve (coaming)

16 Steel Deck Rise Seal Exposed Side Exposed Side a = a. Insulation for H120

17 Exposed Side Seal a. a. Steel Bulkhead Exposed Side a. Insulation for H120

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21 Furnace 1150 C T h o o r 1 r 2 T h i i Air r 3 Insulation Ri R1 R2 R0 Ti T1 T2 T3 T0

22 Certificates Generalised Weaknesses Density of pipes Insulation Length Thicknesses Position of transit Example A-60

23 Product Selection Maximum aperture size of penetration Maximum combination of transits Maximum cable/pipe size Density of fill Spacing between cables/pipes Position of transit in deck/bulkhead Use of insulation Test Evidence Deck and/or Bulkhead Classification, ie A-60, A-0 Pipe Construction Material ie Steel, Aluminium, Plastic Wall thickness

24 Safety Lifetime of Vessel Maintenance Extra cables Removal of cables Cable coating Drilling The Solution Product Development Modification of IMO Resolution Precise and Uniform Approval Certificates

25 Product Development ACTIFIRE technology Impact on steel construction Deformation Displacement Safety First ORMoney First

26 Recommendations to IMO Resolution A.754(18) Specify minimum cable configuration Specify the cables to be tested Specify minimum cable fill (Density) Specify insulation, Divisions, Pipes, Length, Thickness Specify Pipe Construction Material limitations, melting points Wall thickness limitation, max?

27 Reccommendations to the Classification Societies Specify maximum size cable/pipe penetrations Specify spacing between transits Specify position of non-symmetrical transits Level of insulation Specify cable/pipe specifications (limitations) Installation details i.e Instructions, drawings