SA93140430A - Reinforcement system for mastic intumescent fire protection coatings - Google Patents

Abstract

The invention relates to a system of reinforcement of inflatable rubber coating for firefighting. A loose carbon mesh is grown in the coating to support it. Optionally, the carbon network may be used in conjunction with automatically linked reinforcements. Figure 1.

Description

. A, J, Reinforcement System for Anti-Swelling Mastic Coatings (G5 ad) Full Description Background: | The invention relates in general to fire-resistant mastic coatings, and more specifically, the invention relates to reinforcement systems for such coatings. : ° Fire-retardant mastic coatings are used to protect structures from fire. One of the wide uses, spread of it, we find it in hydrocarbon manufacturing plants such as chemical production plants, offshore oil and gas production platforms, and oil refineries. These coatings are also used around storage facilities i 0 hydrocarbons Jo tanks SLE liquefied oil. And often: The paint is placed on the Lad steel structure and performs the function of an insulating layer. deg fire occurs); Coating slows the rise in temperature in steel to allow more time to extinguish fires or evacuate structures. Otherwise, the steel may grind quickly and collapse. Vo mastic coatings are made with a binder such as epoxy or vinyl and various additives are incorporated into the binder to give the coating the desired fire protection properties. The adhesive or binder sticks to the steel.

i and Mastic is a particularly useful type of fire-retardant mastic coating called “swellable” mastic coating. Inflatable coatings swell when foam-like. Charcoal pad, when exposed to the heat of the flame, turns into foam. It has a low heat conduction coefficient and insulates the bottom layer. “Inflatable coatings are sometimes called “rising” or “sublimated” coatings, although the mastic coatings are sticky. ,' Well with most of the lower layers it is known to lay a mesh in the coatings. The network is automatically linked to the bottom layer. US Patent No. 0 and Patent 9,417,791 (granted to) Castell and Co. £,+78, V0 describe the use of a net. In these two patents, the net is described as a | A reinforcement for the coal that forms when a fire breaks out, specifically the grid reduces the possibility of cracking or “cracking” the paint, and if yo: cracks occur in the material, these cracks are not deep when using to apply mastic with dala thickness The net. Therefore, there is no big. A cloth of glass fibers was also used to reinforce the fire-protective mastic coatings. The patent describes a system like this. However, the glass may be ¥,390,YYY US No. ©0 It melts at the temperatures it is exposed to.When glass melts, it does not provide any benefits.

'

The network also provides an additional benefit before there is

a fire. Mastic coatings are mostly applied to steel infrastructure and are often applied when the coating is exposed to harsh environmental conditions, including violent fluctuations in temperature, which may reach Tee degrees Fahrenheit (TAA degrees Celsius). These fluctuations in temperature may lead to Jad Si from the underlying layer, but the network will reduce this separation. The separation occurs as a result of fluctuations in temperature due to the difference in the thermal conductivity coefficients of the coating and the substrate.

When the temperature changes, both the coating and the 000 layer expand or contract to varying degrees. These differences in the tensile and contraction efforts lead to the separation of the loops between the coating and the substrate. Although the mastic paint is flexible to some extent, stress may break the bonding bonds between the paint and the substrate.

Vo, however, the network implanted in the coating makes the thermal expansion coefficient, A, of the coating close to the thermal expansion coefficient, E, of the underlying layer. So stress occurs to a lesser degree and the possibility of separation decreases. a

The use of mesh together with mastic coatings:

It became vulnerable to criticism due to its high costs. It may be from

Automatically, it is desirable to obtain the benefits of connecting a network from Te: without incurring the additional cost.

0 General description of the invention: Considering the above, the aim of this invention is to provide a fire-resistant coating system that is installed at a low cost and provides good protection from fire and has good resistance against temperature fluctuations. o The aforementioned goals and others are achieved with a network made of flexible spun yarns that do not melt or inflame. In one embodiment the coating is an elastomeric coating. In the AT embodiment, the coating thickness is less than 10 mm. An AT embodiment is in which the spun-filament coating is applied to sections of 0 structure smaller than VO meters square and a mesh-reinforced coating of which LT is applied to an underlayment of greater than Hel Vo square meters. The invention will now be understood more fully by referring to the following detailed description and the attached drawings, which contain: 0 A brief explanation of the drawings: 0 Figure (1): shows a coating in which a network of spun yarns has been planted. - Figure (V): shows a facility It was provided with a fire-resistant mastic coating. Figure (V): A cross-section showing a mastic coating that was placed on a surface: bottom. It was coated with ol ud resistant mastic paint, in which a flexible net was planted.

i 1 For a roll of cables that has been provided with a Lew mastic coating, Figure (975): shows a fire-resistant fabric with a flexible mesh embedded in it. Dimension (M0) Figure (*b): shows a cross-section of a roll of cables in the figure Exposed to fire. Figure (+): shows in a cross-section an edge equipped with an expandable mesh. The figure is of structural steel in a hydrocarbon manufacturing facility.However, the invention is also applicable to beams, joists, tubes or other types of structural elements or other surfaces to be protected from: On exposed surfaces of the joist (017) The paint applied is a well-known refractory mastic. (117) Paint: (1001) (trademark) from Textron CHARTEK Corporation. (United States 0) and it is an example of a suitable coating among several coatings that have a carbon network (?10) implanted in it; (017) other suitable coatings. And the coating: of a flexible, non-flammable material (V0 ) and make a network of carbon Tee maintains its structural strength At temperatures above the carbon yarn and predecessor (Busia) degrees Fahrenheit (87.9; Ve) carbon yarn is suitable for this purpose. And as a “carbon” to the AS network? The following expression is used to indicate

Made either from carbon yarn or from bod's precursor carbon yarn. This yarn has the benefit of being light in weight and flexible compared to welded wire mesh. However, it does not burn, melt, or corrode, and Bass withstands weathering.

° The carbon yarns are made of poly-acrylic nitride or bitumen fibers. Then the acrylic polynitride or bitumen is slowly heated in the presence of oxygen to a relatively low temperature (777.7 °C). This slow heating process produces what are called "oxidized fibres". While the multi

0 Acrylic nitride and tar fibers are relatively flammable and lose their toughness to some extent at elevated temperatures; The oxidized fibers are relatively non-flammable and inert until Jad to Veo degrees Fahrenheit (19 degrees Celsius). At higher temperatures, the oxidized fibers may lose their weight, but they remain suitable for use in coatings.

| Because it does not lose its carbon content. of ddl protective Yo carbon at least.* “0” and oxidizing fibers contain

Carbon fibers are made from oxidized fibers by heating 5.05 seconds according to known manufacturing techniques. This second heat treatment step will not be necessary in some cases, including:

+ Heat treatment may take place during a fire. After heat treatment) the fibers contain preferably more than XA carbon and most preferably more than NAA carbon. And the fibers

A

Carbon is lighter, stronger and more resistant to heat or flame than the previous materials. However, carbon is more expensive due to the additional processing than the weight per hour (NV) needed. Carbon fibers lose about 1 percent of their shelter in air. And by planting it in a protective coating of Tee at the degree of fire it will also decompose to a lesser extent. It is preferable that the network of 1 and the less preferable (pw V.00) carbon (?00) have an opening below the inch.

LY and VY at all between Jad gp (aw 1.7 a/) of half an inch to provide sufficient strength (pw +.75 cm to +.1 +) of an inch and allow With good swelling of it (017) and allowing correct incorporation into the paint at (017) in a fire. This spacing also reduces cracking of the paint 0. Swelling and the carbon yarn used should provide texture

CoV) per square yard Mb spots his weight between ?+, (Yel kg +, TY) kg/m") and **, + lbs per sq yd lbs on IY and 0.17 and the most preferred is that its weight falls between Ve (kg / m). And if oxidized fibers are used, the weights will be higher and it is preferable to be 1 pound over 1 pound on the square cold and 0 tA between 5 50 and more Preference (Va/pa—S +, 08 yd) to +08 y|se WV between ?1,+ and 7#, + lbs. (751*,+ to Ve 1 kg / m. It is permissible to use various types of yarn. It is preferable to use a multi-layered yarn. It is desirable to use yarn with # to * layers. The yarn is flexible and can be turned into a net: with techniques It is possible to use a plain weave or an atlantic weave of these pte (regular repetitive morphologies) or a stretchy plain weave. It may be large with commercial textile equipment. Plasty fabrics can be made oe well-known axes. AWS networks The most specialized in weaving techniques, and while the resulting net is more expensive, its resistance is equal in all directions. Ale may have a larger explosion and it has the ability to produce the net as well by weaving with narrow widths or by sewing it in a pattern of knitting stitching. painted according to the following procedure. A layer of inflatable mastic paint may be applied to the truss, and a layer of inflatable mastic paint may be applied by spraying or rolling the carbon mesh Glia by brushing it with salt (trowels). And before the roof Gab (101) is above the roof. It is desirable to wrap the grid (Ve) 10 around as many of the joist edges as possible as a single panel and press the canvas (108) into the paint with a trowel (two trowels) or a roller (00) dipped in a solvent or By other appropriate means, and after that) more mastic is applied as a traditional coating. Therefore, (017) the coating is pao for mitosis. Hence, the ve carbon network is “loose” because it is not directly mechanically bonded to the substrate.

A 0 1 and reinforcement with a carbon mesh (?10) is desirable at the edges as cracking is highly likely. It is also desirable to use it on medium sized surfaces using coatings with a thickness of up to VE mm. Medium-sized surfaces are non-discrete surfaces having at least one dimension between + inches and VV feet (Ve, ¥E cm to AY, cm). It is permissible to use carbon cloth for larger surfaces. Other than LI, we found that when coating surfaces with inflatable mastic paint and then subjecting it to temperature variations or exposing it to fire, the stress within the coating increased proportionally with the size of the painted area. These stresses cause cracks and cause the paint to fall off the bottom layer. As a result, it may be desirable to mechanically bond the reinforcement to the substrate when painting large surfaces. For example) nails can be welded to the bottom layer before coating: Ve with a refractory mastic paint. After placing the carbon grid 0 may then bend the pins over the carbon grid to hold it in place Yaa from that) Metal tweezers can be placed on the edges of the substrate in order to attach the carbon grid to the substrate at the edges. : It is possible to use a wire mesh as it was used traditionally 0 for these wide surfaces. We also found similar increases in internal stress for coatings thicker than 1 mm. For these thicker coatings;

11 The stresses arising from slow thermal expansion and contraction in a fire. And SLI mesh] creates greater hardships than carbon stresses as described in this statement. Elastic epoxy bandages to avoid separation that results from heat cycles. For example. The two US Patents No. 111,+7+,5 and No. 77 describe such types of coatings and the use of flexible mastic coatings with epoxy bonding 10 to reduce the effect of temperature cycles. As a result your name paints can be used lightly with elastomeric mastic 10? inflatables with epoxy bonding up to approx. Therefore, it may be desirable to use a set of LS ew mm | Means of reinforcement from different points in the facility. For example, 1 small surfaces with sdb capable mastic coatings, ideally, can be: to be exposed without reinforcement. Surfaces and edges of medium size should be coated with inflatable mastic, supported by loose carbon cloth. Wider surfaces are fixed with a grid. The areas covered by Senha sea ug mm may be supported by a welded metal mesh VE with a thickness of more than Sled Ye in a schematic manner a manufacturing facility (FV) and the figure shows

9" hydrocarbons in the open sea (Vor) and contain structures supported by tributaries and columns such as columns (VoV) and (Vel). These tributaries and columns are of different sizes referred to here as small and medium. The facility contains (Veo ) as well as surfaces described as Les: 0, with a wide lattice; for example), the outer surface of the tank (711), the platform (YoA) and the underside of the building (Ye) contain several wide surfaces. The most appropriate technique can be used for each of these types of surfaces.Fig. (V) shows in more detail the underside of the floor or (Vol) dated! supported by columns:

Lawl g decks JS 03 (Veo) and distance (3) between joists (Foo) 0 (Ve) of the platform Lot can be usefully supported by a grid attached to the small or medium decks (Feo) on The joists (Vet) and the zones can be reinforced with a carbon net. AUD and instead of (Fe) dated !10 touches to the grab off the top of the joists (717) coating gis (Ye) and on surfaces AY where the dimension Job! is vertical the cemented mastic coating With a loose carbon lattice, Ye may also be dispersed to move away from the surface.In these cases, bides, nails, or other bonding devices may optionally be used on these surfaces.Returning now to Figure (VF) illustrates another benefit.

For flexible support use. Figure (8) shows a cross-section of a beam in the form of the letter (tee) (I) coated with fire-retardant mastic. In this case, the carbon grid (£08) is woven when used. The fire-retardant coating expands when a fire occurs The carbon net © (£08) also expands at the folds. In this way the carbon net (Tet) will support the outer parts of the charcoal. Therefore, the outer parts of the charcoal will not be inclined to crack or peel off in the event of a fire. Longer protection can be obtained by using a net Loose expanded carbon in the outer half of the z0 fire protection coating at the edges. Preferably the expanded mesh in the outer third of the material. : The use of an expanded mesh with the other surfaces having a half bd of small convexity is also useful. The use of a mesh Stretched on tubes and other surfaces having a diameter of convexity less than about Vo tA cm desired. On a rounded structure such as a coil of cable (00d), the bse of the stretched coating is larger than the circumference of the unstretched coating. No flexion (00) allows the mesh to be expanded with the coating as shown (Ve) in figure (*b) and thus provides support for the outer parts of the charcoal (*7'). One of the disadvantages of using solid Sb in the outer part of the FLAS SWI coating is that the solid network blocks the opening (in

In the event of a fire, the coating is less effective as an insulating material, and $352 is used as an expandable net, which blocks swelling to a much lower degree, which leads to better protection from fires. Figures () and (19) show an expanded carbon net made by bending the net The bend may be made by folding the carbon net when oe is sewn and put on. It will stretch. And sewing from the demand. Figure (+) shows an alternative method for making a mesh that can be z be has a less convex radius (Tee) for stretching. The edge of a substrate layer and implants inside the coating + (TeV) of 00 cm are coated with refractory paint F (1 * 1b). Two sheets of carbon (TNT) lattice (FeV) are inserted into (NE) at the edge. The coating (SNe) swells the plates (408) and , allowing them to swell. (S708) and (Ee) the plates will be 0 apart and the use of stretchable mesh as described is useful up to s| And if a material with lower temperatures is used to form the network, for example, the glass fibers traditionally used das for reinforcement can be made expandable, but by using a net by carbon, the benefits of using a non-flammable net are obtained. Fusible and flexible. It will be seen that other embodiments can be built.

Vo (eg) using the carbon grid. Similar results can be obtained by using a metal wire mesh that has been sewn or blotted. Stainless steel, carbon steel, copper or similar wire may be used to make the flexible wire mesh. Small diameter wire should be used to provide flexibility. It is preferable to have wire gauge 0 and the seamless structure Ve and most preferably smaller than Ve smaller than Van mesh (Jad! is also preferred because it provides flexibility). This is convenient to use.However, ElslaChe mesh is heavier than carbon mesh and is not recommended for weight sensitive applications.Also, mesh 0 made of ceramic yarn instead of carbon should be used more costly than AST mesh to provide a flexible mesh. Although it is (brand REFRASIL carbon, the net made of Refrasil is commercial) manufactured by Carbonundum Company as a builder of silica fibers, it can be used in the same manner.

Claims (1)

Gel 0 Protection Elements: 1 1 - Underlayment covered with inflatable mastic paint protective against '" fire with a carbon mesh implanted in it and the mentioned mesh has a weight of less than ' 1 pound per square yard (+ 51 kg per square meter). 1 9 - The bottom layer according to the protection requirement (1), where the carbon net is made of bod carbon yarn, and the distance between the yarn threads is less than das 1,772 inches (cm). 1 © - the lower layer according to the protection requirement (7) where the carbon net A 'is made from a group of yarns where the percentage of carbon increases NE ' 1 4 - the lower layer according to the protection requirement (VF) where the net A * Carbon A proportion of carbon greater than NA and a weight of less than #, + lbs' per square yard (FY) 6 kg per square metre) dpi dl - # 1 according to protection requirement (1) where the carbon net is made ¥ by weaving b gd { for carbon in the form of a plain weave. Weave yarns I of lacquerbon in the form of a triaxial weave: 1 " - the structure according to the protection requirement (1) where the carbon network is made Weaving carbon threads in the form of a string (with narrow widths). | Where the carbon network is made (1) the structure according to the requirement of protection - A) by sewing carbon yarn. | SL for the manufacture of hydrocarbons, including a wide surface FAS - 1 100 (pe AV) cm) and a medium-sized surface with a dimension of less than (AY) and no heavier than | And for the aforementioned facility: £) 2 4 inflatable mastic paint 9 | 3 oad Io to be placed on a surface: ° wide with a grid planted in it) e) the mentioned wire mesh 4 is automatically attached to the wide surface and Y (b) a fire-retardant, inflatable mastic coating is placed on a medial mesh A | pad with loose elastic mesh implanted into the coating. (2) Synthesis of hydrocarbons according to the protection requirement Flo Sn - 0 1 wherein the flexible net is a carbon net weighing less than 1 pound per + square yard (+ 51 kg per square metre). J|3: Where (V0) the bottom layer shall be made in accordance with Claim No. 11-1 1 i VA ; Carbon network of carbon yarns and the distance between them ». (7 k a cm sh) The yarn is less than half an inch 7, where the (VY) Ap net is made of the bottom layer according to the demand of the protection - VY 3255 carbon from a group of yarns, the percentage of carbon in it : . 0 on |g, where (VV) the substrate according to Protection Claim No. 19 0 1 and having a weight of less than half of 06 percent of the carbon in the carbon network exceeds “: kg per metre.” square). +, TV) lbs per square yard in which the AA network (V0) fabricates the structure according to Claim No. = 1? 1: carbon yarn in the form of a plain weave. carbon peda Y where the net (Ve) of the structure is made in accordance with Claim No. 101-1: carbon yarn in a triaxial weave. carbon peda where the net (yo) is made in accordance with Claim No. ap JI - 47 1 Carbon fiber with a yarn weave ! + Carbon fiber in the form of a distance fabric | Y The interval between its threads is narrow 0 where the 4 Ye network is made (the structure according to Protection Claim No. - 7) Y carbon stitching with carbon yarn. 18# 1 - Structure comprising: (GD) ¥ a roof supported by joists 0: '(b) a bulging mastic sdb, a fire shield to be placed on ?; surface and on the joists. z) 4 ° metal grid mechanically attached to the surface and implanted in the coating + fire protection placed on the surface and extending the metal grid: 7< mentioned in the removable mastic coating z + protective from ! on the transom. + (d) a loose elastic web in the coating applied to the joist. 11 1 - The structure according to the protection claim (JA) where the elastic net is a carbon net made of carbon yarns with the ddelidl distance between the yarns being between 1/16 of an inch and a half?; inch (eV cm to 1.77 cm). Fe - the structure according to the protection requirement (1) where the flexible net is a carbon net with a weight of less than half a pound per square yard (YY) Vv kilograms per square meter). (FY) - a base layer coated with mastic shay that can swell and for the layer: Ye 011 ) bo is the lower portion of a curve with a radius of concavity | Less than 1? PU Y 4 cm and including an implantable mesh that can be stretched in the mastic coating 7 covering the curved part. Expandable net on a woven net. ¥ Where (VY) the underlayment pursuant to Requisition No. 1-0 the stretch net includes a flexable net. 0 Where V| includes (YY) The bottom layer according to Claim No. - TO) the stretchable net on a first piece of flexible net and ¥: a second piece of flexible net crossed with the first piece. Protection No. - Yo 1 The expandable net is made of carbon yarn. (VV) The bottom layer according to Protection Claim No. 37-1 The expandable network of ceramic fibers.