FireNut - Topside Protection - Topside - Trelleborg Offshore

FireNut™

In refineries, offshore oil installations or wherever hydrocarbons are transported, the pipes are flanged and held together with nuts and bolts. In case of fire, the flanges and pipes should maintain the same level of integrity to avoid escalation. Traditional protection is to capsule the whole valve and flanges in a fire-insulated metal box - a bulky, heavy and expensive solution. The box also creates challenges during inspection and maintenance. Trelleborg has developed a jet fire protection for bolted connections to extend service life in the event of a fire. The easy to install FireNut resists both jet fire and pool fire and is tailor made to accommodate almost any bolt size. The rigid and tough design means that FireNut has extremely good resistance to mechanical damage when installed.

Tailored specifications

FireNut™ can be made to fit any shape and size to suit individual requirements.

High resistance

High abrasion, blast, impact, jet fire, ozone, UV, most solvents  and seawater resistant

Protection

Excellent HISC, corrosion, fire mechanical and wear protection

Key Applications

New bolts

New nuts

Old bolts

Old nuts

Gallery

View FireNut™ 

Technical specifications

Below are examples of FireNut assortments

  D, FireNut™ width
H1, FireNut™ height 
H2, nut height (casted nut, exceeding bolt)
H3, socket height
D2, socket diameter
R,
FireNut™ wall thickness 
             
                 
  Size D3 [mm] D [mm] D2 [mm] H1 [mm] H2 [mm] H3 [mm]
R
 
  1/2 UNC - 13 13 40 26 41 20 14 10
  5/8 UNC - 11
16 45 31 48 23 17 11
  3/4 UNC - 10
19 51 37 54 25 20 12
  7/8 UNC - 9
22 56 42 60 28 23 13
  1 UNC - 8 25 62 48 83 48 28 14
  1 - 1/8 UN8 29 67 53 90 51 31 15
  1 - 1/4 UN8
32 73 59 96 54 34 16
  1 - 3/8 UN8
35 78 64 102 57 37 17
  1 - 1/2 UN8
38 84 70 109 60 40 18
  1 - 5/8 UN8
41 89 75 115 64 43 19
  1 - 3/4 UN8  44 95  81  121  67  47  20
  1 - 7/8 UN8
48 100 86 128 70 50
21
  2 UN8 51 106 92 134 73 53
22
  2 - 1/4 UN8
57 117 103 147 79 59
23
  2 - 1/2 UN8
64 128 114 159 86 66
24
  2 - 3/4 UN8
70 139 125 172 92 72
26
  3 UN8
76 150 136 185 98 79
28
  3 - 1/2 UN8
89 172 158 210 111 91
30


PRODUCT SHEET
Trelleborg Offshore Firenut

FireNut™

MMO
Elstopipe Installation

Maintenance, Modification and Operations

From passive fire protection solutions to its Elastopipe™ piping system, Trelleborg Offshore has developed a portfolio of solutions serving maintenance and modification across the oil and gas industry for green and brownfield projects.

Related Products

Other Trelleborg Offshore products in the Topside segment

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If you are interested in our current job vacancies please visit our careers website http://trelleborg.com/en/career

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