WO2013006356A2 - Gaine de protection pour éléments structurels - Google Patents

Gaine de protection pour éléments structurels Download PDF

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Publication number
WO2013006356A2
WO2013006356A2 PCT/US2012/044524 US2012044524W WO2013006356A2 WO 2013006356 A2 WO2013006356 A2 WO 2013006356A2 US 2012044524 W US2012044524 W US 2012044524W WO 2013006356 A2 WO2013006356 A2 WO 2013006356A2
Authority
WO
WIPO (PCT)
Prior art keywords
protective sheath
gap
structural component
composite pipe
pipe
Prior art date
Application number
PCT/US2012/044524
Other languages
English (en)
Other versions
WO2013006356A3 (fr
Inventor
Jaan Taagepera
Edwin Hall NICCOLLS
Original Assignee
Chevron U.S.A. Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chevron U.S.A. Inc. filed Critical Chevron U.S.A. Inc.
Publication of WO2013006356A2 publication Critical patent/WO2013006356A2/fr
Publication of WO2013006356A3 publication Critical patent/WO2013006356A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/001—Cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/08—Fastening; Joining by clamping or clipping

Definitions

  • the invention relates to a protective sheath for structural components such as vessels, equipment, piping systems, etc., and methods for providing protection for and / or heat dissipation in a structural component.
  • Structural components such as vessels, piping or tubing for carrying fluids such as petroleum products may require protection from fire damage depending on the fluid contained, the material of construction, and the location of the equipment. Conduit for use in containing instrumentation and electrical wirings may also need similar fire protection.
  • the usual approach for fire protection is to install insulation materials, e.g., polyurethane foam, intumescent coatings, fiberglass, calcium silicate insulation, etc., around the pipe or equipment.
  • insulation materials e.g., polyurethane foam, intumescent coatings, fiberglass, calcium silicate insulation, etc.
  • Application of an insulative fire-protection layer would help in the event of a fire with the side effect of heat retention within the equipment or piping, which can be beneficial if the intent is to keep the process fluid hot.
  • Composite wrappings e.g., non-yellowing fiberglass tapes pre-impregnated with a resin, have been used to provide UV protection for equipment and pipes.
  • heat retention can be undesirable with the prior art approach, particularly for certain process equipment and under certain operating conditions, e.g., the use of composite materials for carrying process fluids such as petroleum products at high temperatures.
  • the invention relates to a method to dissipate heat build-up in a structural component carrying a hot fluid.
  • the method comprises: providing at least a structural component for containing the hot fluid, the structural component having an outer surface area; providing a protective sheath disposed around the structural component, creating an air space between the outer surface area of the structural component and the protective sheath, the non-insulating protective sheath having at least two openings, a first opening near or at a bottom side of the sheath and a second opening near or at a top side of the sheath; and dissipating heat build-up by creating a chimney effect from air drawn in through the first opening, passing through the air space over the structural component and exiting out the second opening
  • the invention in another aspect, relates to a system for carrying a hot fluid, the system comprising: at least a structural component for containing the hot fluid; a protective sheath disposed around the structural component, forming an air space between the structural component and the protective sheath, the protective sheath having at least two gaps including a first gap and a second gap; wherein the gaps are sufficiently spaced apart to allow air flowing into the first gap through the air space and out of the second gap to dissipate heat from the hot fluid contained within the structural component.
  • the invention in another aspect, relates to a composite pipe system for carrying petroleum products, the pipe system comprising: at least a composite pipe for carrying the petroleum products; a protective sheath disposed around the composite pipe, forming an air space between the composite pipe and the protective sheath, the protective sheath comprising at least two half-pipe sections, and wherein each half-pipe section has two opposite seams each shaped at an angle such that the shaped seams from the two half-pipe sections in abutting position define a first gap and a second gap running longitudinally along full length of the protective sheath; intumescent adhesive material applied onto opposing sides of the shaped seams.
  • Figure 1 is a perspective view of a pipe section including an embodiment of the protective sheath.
  • Figure 2 is a cross-section view of the pipe section of Figure 1.
  • Figure 3 is a perspective view of a pipe section in a second embodiment of a protective sheath.
  • Figure 4 is a cross-section view of the pipe section of Figure 3.
  • Figure 5 is a perspective view of a third embodiment of a protective sheath prior to assembly.
  • Figure 6 is another perspective view of the protective sheath of Figure 5 after it is assembled to be used on a pipe section.
  • Petroleum products refer to natural gas; natural and synthetic liquid hydrocarbon products including but not limited to biodegraded oils, crude oils, refined products including gasoline, other fuels, and solvents; and semi-solid / solid hydrocarbon products including but not limited to tar sand, bitumen, etc.
  • Structural components refer to containers, supporting members, structural supports, tubings, pipelines, pipe systems, vessels, reactors, transfer lines, process piping, processing equipment including but not limited to distillation columns, and the like for commerce including but not limited to chemical, petrochemical, and oil & gas industries.
  • the structural component is a section of pipe for transporting petroleum products.
  • process fluids such as petroleum products
  • process fluids such as petroleum products
  • process fluids such as petroleum products
  • Thickness refers to the average thickness of a layer.
  • Composite material refers to an engineered material made from two or more constituent materials with different physical or chemical properties and which remain separate and distinct on a macroscopic level within the finished structure.
  • the composite layer comprises a fiber material in a matrix, e.g., a fiber- reinforced plastic composite material, a fiber reinforced resin, glass-reinforced plastic or GRP, a fiber-reinforced ceramic matrix composite material, a metal matrix composite with a reinforcing fiber in a metal matrix, a glass fiber material in a glass ceramic composite, etc.
  • Composite material comprising glass fiber in a plastic or ceramic matrix typically has a very low thermal conductivity compared to that of metals, e.g., fiberglass has a thermal conductivity of 2 BTU//ft 2 -hr-°F-in vs. a value of 320 BTU//ft 2 -hr-°F-in for steel.
  • a reference to "intumescent” or “intumescent material” is by want of exemplification of a material which upon heating to a temperature ranging from about 300 to 1200°F, expands to a dimension (e.g., thickness) that is at least 3 times the original dimension, which can be applied as a coating, a pad, an adhesive, a layer, or a sealant. In one embodiment, the material expands to 5-15 times its original volume.
  • the intumescent material may comprise compositions with intumescent characteristics, e.g., graphite, sodium silicate, vermiculite, or blends thereof, or a blend of intumescent composition in other materials such as non-combustible fibrous materials or elastomeric materials.
  • a reference to "pipe,” “pipe system,” or “piping system” is by way of exemplification of a structural component, and not intended to exclude other equipment, equipment sections, in other forms or shapes such as vessels, or piping components and fittings such as elbows, tees, reducers, etc.
  • a reference to "hot" as in a hot process fluid means the fluid is at a temperature greater than ambient.
  • Air space refers to the space opening between the protective sheath and the equipment protected by the sheath.
  • Gap refers to an opening formed on the surface of the protective sheath, or an opening on the surface of the protective sheath ("side opening” or “side hole”).
  • the invention relates to a protective sheath that provides fire protection for the underlying equipment, while allowing heat dissipation or ventilation from the outer surface of the equipment under normal operating conditions.
  • the invention relates to a protective sheath that provides heat dissipation or ventilation from a chimney effect.
  • the underlying equipment can be constructed from composite or metallic materials, and the protective sheath can be constructed from metallic or non-metallic materials.
  • the protective sheath is installed for the protection of the equipment prior to a fire event. It can be installed on the equipment after the system is in place, i.e., after all the equipment pieces are installed and connected together, or it can be installed as a component of the equipment to be installed.
  • the protective sheath can be of any shape or form, preferably in a shape conforming to the equipment being protected, e.g., a curved sheath for the protection of pipelines, as long as an air space or spacing is provided between the outer surface of the equipment and the protective sheath.
  • the air space in-between the protective sheath and the equipment has an average thickness of at least 1/8" in one embodiment, at least 1/4" in a second embodiment, and at least 2" in a third embodiment.
  • the dimension of the air space depends on a number of factors, including but not limited to the dimensions of the equipment being protected, the properties of the fluid being contained, the process conditions, e.g., amount of heat expected to be generated by the process fluid, environment factors such as climate condition, sun exposure and direction.
  • the protective sheath in one embodiment comprises a plurality of pieces when put together, slightly larger than the equipment to provide an air space (gap) and conforming to the shape of the equipment, e.g., two half pipe shaped sheath sections for protecting a pipe section with each sheath section having an inside diameter sufficient larger than the outside diameter of the pipe to create an air gap of at least 1/8" between the sheath and the pipe.
  • the number of pieces / sections forming the protective sheath depends on the size of the equipment to be covered, the material of construction for the sheath, the location of the equipment, whether the sheath is for an existing installation, among other factors.
  • the sheath can be a single piece. An installer can pull or spread the opposite seams of the sheath apart, allowing the sheath to be slipped over the equipment piece to be protected.
  • the sheath sections are structured such that after installation, a gap of at least 1/8" is formed along a length of the sheath (and the equipment such as a pipe), allowing for the free flow of air around the protected equipment.
  • the gap is at least 1 ⁇ 4".
  • the sheath has two gaps positioned on opposite sides and running longitudinally along the length of the sheaths.
  • the gap is formed by positioning two seams (edges) of two sheath sections (or opposite seams of an open-pipe shaped section) in an overlapping relationship and leaving a space between the two overlapped seams to form the gap.
  • the gap is formed by bending or shaping the seam at an angle to the contour or the body of the sheath, e.g., 90°, such that two seams in adjacent (e.g., abutting) define an opening in-between the adjacent seams forming the gap.
  • the gap in-between the seams can be kept open with the use of appropriate spacers, retaining clips, bolts, etc., holding the seams together to retain the sheath in place while still leaving a gap for heat dissipation / air ventilation.
  • opposing seams of the sheath are fastened together with the use of bolts / nuts, with spacers being used for keeping the gap open.
  • the sheath is provided with a plurality of spaced-apart fingers (e.g., projections or tabs) on one seam, with the seam on the opposite side being provided with a plurality of corresponding spaced openings. Once the fingers pass through the openings, the fingers are bent back forming interlocks that secure the sheath around the equipment.
  • a plurality of spaced-apart fingers e.g., projections or tabs
  • the gap runs at least a portion of the length of the protective sheath. In another embodiment, the gap at least one half the length of the protective sheath. In yet another embodiment, the gap is between 1/8" to 1" in width and runs the entire length of the protective sheath. In one embodiment, instead of or in addition to gap(s) formed in between the seams of the sheath section(s), the sheath is provided with a plurality of side openings for air flow around the protected equipment. In one embodiment, the side openings are in the form of slits positioned along the length of the protective sheath.
  • the area adjacent to the gap e.g., the seam areas defining the gaps or the side openings
  • an intumescent material expands to its effective thermal dimension (e.g., thickness) when exposed to high temperatures, effectively closing the gap or the side openings and block radiant heat.
  • An "effective" thermal dimension is a dimension which the intumescent material fully expands when heated, e.g., from 300°F to 1200°F. The effective dimension ranges at least 3 to 15 of the initial dimension of the intumescent material prior to heat exposure.
  • an intumescent adhesive pad is applied onto the seam areas defining the gaps or the side openings.
  • moldable intumescent sealant (or putty) is applied onto the seam areas of the gaps or the side openings.
  • intumescent pads for fire protection, the gap remains open during normal operating conditions and closed in a fire due to the expansion of the intumescent coating (or pad). If there is a fire from the equipment containing process fluids, surrounding structure may catch on fire if an intense heat were to spread from equipment without a protective sheath that would close up in a fire. Conversely, in the event of a fire from the outside of the equipment, it may be desirable to fire protect the equipment with the sheath to help prevent fire from reaching inside. In such a fire event, the system temperature increases as the result, but the protective sheath is expected to provide the equipment and the fluid contained within protection from both radiation and convective heat transfer.
  • the intumescent material can be pre- applied prior to installation of the sheath on the equipment, or applied after installation after the sheath on the equipment.
  • the intumescent material is applied such that the gap substantially closes or filled with the expanded intumescent material.
  • a checkerboard application may be used so that in a fire, the intumescent material expands in all dimensions closing the gaps between pieces of intumescent pads as well as the gaps between the overlapping seams of adjacent sheaths, or adjacent sheath sections.
  • intumescent coatings are applied onto all seam areas to ensure that all gaps are closed in the event of a fire.
  • intumescent materials are selectively applied to some gaps only, e.g., the gap at the bottom (base) and not the gap at the top of the protective sheath for an overhead pipe system. The closure of the bottom gap protects the equipment from fire encroachment that may be spread from equipment and surround areas underneath the pipe system.
  • UV protection / heat dissipation is a priority instead of fire protection, the gaps are left open without any intumescent application.
  • a plurality of spacers are positioned in-between the sheath and the outer surface of the pipe to be protected.
  • the spacers can be constructed out of wood, plastic, metal, adhesive material, intumescent material, etc.
  • the spacers can be constructed as an integral part of the sheath or as extra pieces to be applied between the sheath and the equipment.
  • the spacers can be randomly spaced, or they can be positioned in locations that would provide rigidity to the sheath, means to attach the sheath to the equipment being protected within and / or the most structural support for the sheath, defining the amount of desired air space in between the sheath and the equipment being protected.
  • the gaps are positioned half-way on the curvature of the sheath cover of the pipe to allow air circulation without fluid leakage to the thoroughfare below.
  • a drainage pipe is optionally provided for connection to the sheath, allowing the draining of any rainwater or process fluid to the ground.
  • At least one of the gaps is positioned at the bottom of the sheath curvature to allow for the free draining of rainwater or process fluid should the pipe leak.
  • air flow inlets are formed via the gaps (and / or side holes) in bottom area of the protective sheath. Heat is dissipated from (or prevented from being entrapped in) the equipment via a chimney effect.
  • the protective sheath draws air in through the air flow inlets, e.g., gaps located at the base or bottom of the sheath. The air flow is passed over the protected equipment heated by convection.
  • the air is heated such that it rises and exits out through the outlet(s) formed in the gaps (and / or side holes) near or at the top of the sheath / equipment being protected.
  • heat is effectively dissipated with the chimney effect created in the protective sheath, i.e., the pulling-in and directing of air flow through the gaps or side holes in the sheath. Therefore with the protective sheath, the temperature on the skin (outer surface) of the equipment carrying a hot process fluid remains considerably lower than that of the process fluid.
  • the temperature on the outer surface of the equipment is between 5 to 30°C above the prevailing ambient temperature.
  • the protective sheath also provides UV / rigidity protection for equipment, prolonging the life of the equipment.
  • the protective sheath in one embodiment is made out of metallic sheet material such as stainless steel or carbon steel for fire protection.
  • the protective sheath can be constructed out of non-metallic materials such as plastics and the like.
  • the protective sheath may be formed of many pieces attached together in a longitudinal direction (for a pipe system) or in other manners such that there are extending or overlapping seams between each piece, providing a protective sheath for the entire system.
  • the different sheath sections can be constructed out of the same or different materials, depending on the particular piece of equipment in system to be protected, e.g., its location, the process fluid being contained or transported in the particular piece of equipment in the system, its location, etc.
  • the sheath sections can be attached to one another or secured to the underlying equipment and / or supporting structure using straps, pins, etc. or other securing mechanisms known in the art.
  • the sheath can be replaced and / or recoated with new intumescent coating or pads at the gap area.
  • the sheath can also be removed from one piece of equipment and retrofit for installation on another piece of equipment.
  • a protective sheet made out of stainless steel is employed to provide fire protection for a composite pipe system, particular a pipe system for containing flammable fluids such as petroleum products.
  • a loss of containment in any portion of the piping system may result in a high temperature, high heat flux, high velocity flame, or a jet fire.
  • the temperature of the fire increases continuously and can be at 900°C after 60 minutes, about 1050°C after 120 minutes, and up to 1150°C after 240 minutes.
  • the composite pipe system is characterized as meeting level II fire endurance standard according to the test method specified in the International Maritime Association (IMO A753, adopted November 4, 1993), i.e., the pipe can endure a fully developed a hydrocarbon fire for a long duration without loss of integrity under dry conditions. In one embodiment, it takes at least 45 minutes before the inside diameter of the composite pipe in a system with the fire protective stainless sheath to reach 190°C under the conditions of the IMO A753 test.
  • FIG. 1 is a perspective view of a pipe section 30 including an embodiment of a protective sheath.
  • the protective sheath comprises two separate sections 10 and 20 each with seams 11 and 21 respectively, overlapping forming the air space 15. Facing surfaces of the seams are lined with intumescent pads 11 and 22, which under heated conditions will expand to completely close the air space 15.
  • the sheath includes retaining clips to secure and / or maintain the seams in position, keeping the air space 15 open for air ventilation.
  • the protective sheath is provided with one strip of intumescent pad for lining one seam only.
  • the strip is lined on a seam on an intermittent and not continuous basis.
  • Figure 2 is a cross-section view of the pipe section of Figure 1, further showing spacers 14 and 24 which provides structural support for the protective sheath as it is installed over the pipe section 30.
  • the spacers can be employed to prop the seams separate keeping the air space 15 open for ventilation.
  • Figure 3 is a perspective view of a pipe section in a second embodiment of a fire-protective sheath.
  • the seams 11 and 21 are bent at a 90° angle with respect to the curvature of the sheath sections 10 and 20, leaving an open gap 15 for air ventilation.
  • the facing surfaces of bent sections 11 and 12 are lined with intumescent pads 11 and 12.
  • the sheath includes threaded bolts 23 (or retaining clips not shown) to maintain an open air space 15.
  • only one seam is lined with an intumescent pad on a continuous or intermittent basis.
  • Figure 4 is a cross-section view of the pipe section of Figure 3, further showing spacers 14 and 24 which provides structural support for the protective sheath.
  • Figure 5 is a perspective view of another embodiment of a protective sheath
  • intumescent pads 12 are provided on some of the projection tabs.
  • the sheath is provided with an air space or slit 15, which is provided with a plurality of spaced apart intumescent adhesive pads 16. In the event of a fire, the intumescent pads expand to cover the holes 21 as well as the slit 15.
  • Figure 6 is a perspective view of the protective sheath in Figure 5 after assembly. As shown, after the tabs pass through the spaced apart holes 21, the fingers 11 are bent back forming interlocks that secure the sheath around the equipment.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Insulation (AREA)

Abstract

La présente invention concerne un procédé de dissipation de l'accumulation de chaleur dans un élément structurel. Dans un mode de réalisation, l'élément structurel est un tuyau composite destiné à transporter un fluide chaud, par exemple, des produits pétroliers. Le procédé consiste à fournir une gaine de protection disposée autour de l'élément structurel et à former un espace d'air entre l'élément structurel et la gaine. La gaine présente au moins deux espaces sur sa surface, les espaces étant suffisamment espacés les uns des autres pour permettre à l'air de circuler à travers l'espace d'air d'un espace à un autre pour dissiper l'accumulation de chaleur du fluide chaud contenu dans l'élément structurel. Dans un mode de réalisation, un matériau intumescent est appliqué à proximité des espaces, ledit matériau se dilatant lorsqu'il est chauffé à une température dans un feu pour fermer efficacement les espaces et protéger l'élément structurel du feu.
PCT/US2012/044524 2011-07-01 2012-06-28 Gaine de protection pour éléments structurels WO2013006356A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161503623P 2011-07-01 2011-07-01
US61/503,623 2011-07-01

Publications (2)

Publication Number Publication Date
WO2013006356A2 true WO2013006356A2 (fr) 2013-01-10
WO2013006356A3 WO2013006356A3 (fr) 2013-02-21

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Application Number Title Priority Date Filing Date
PCT/US2012/044524 WO2013006356A2 (fr) 2011-07-01 2012-06-28 Gaine de protection pour éléments structurels

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US (1) US20130000868A1 (fr)
WO (1) WO2013006356A2 (fr)

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
US10573860B2 (en) * 2013-11-19 2020-02-25 Ingersoll-Rand Company Cordless power tool batteries
WO2017201412A1 (fr) * 2016-05-20 2017-11-23 Specified Technologies Inc. Système coupe-feu pour conduite omnibus
US20210196001A1 (en) * 2018-05-31 2021-07-01 Edward O'Malley Cycling shoe closure mechanism
US11739880B2 (en) * 2021-05-19 2023-08-29 Samuel Gottfried High temperature protection wrap for plastic pipes and pipe appliances

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US4619292A (en) * 1983-10-14 1986-10-28 Apx Group, Inc. Air gap pipe
US5103609A (en) * 1990-11-15 1992-04-14 Minnesota Mining & Manufacturing Company Intumescable fire stop device
WO2004013528A1 (fr) * 2002-08-02 2004-02-12 Environmental Seals Ltd Revetements ignifuges pour raccords de conduits
KR20040080425A (ko) * 2004-08-31 2004-09-18 황길연 배관재의 현장 접합을 위한 연결 외관, 이를 이용한 배관재의 접합 방법 및 접합 시스템
US20100094392A1 (en) * 2008-10-10 2010-04-15 Edwards Lifesciences Corporation Expandable Sheath for Introducing an Endovascular Delivery Device into a Body

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US5781411A (en) * 1996-09-19 1998-07-14 Gateway 2000, Inc. Heat sink utilizing the chimney effect
US8267166B2 (en) * 2005-04-05 2012-09-18 Vetco Gray Scandinavia As Arrangement and method for heat transport
FR2936856A1 (fr) * 2008-10-07 2010-04-09 Aerazur Tuyau composite adapte pour transporter indistinctement un combustible hydrocarbure ou un fluide hydraulique
US8875744B2 (en) * 2011-07-01 2014-11-04 Chevron U.S.A. Inc. Protective sheath for structural components

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619292A (en) * 1983-10-14 1986-10-28 Apx Group, Inc. Air gap pipe
US5103609A (en) * 1990-11-15 1992-04-14 Minnesota Mining & Manufacturing Company Intumescable fire stop device
WO2004013528A1 (fr) * 2002-08-02 2004-02-12 Environmental Seals Ltd Revetements ignifuges pour raccords de conduits
KR20040080425A (ko) * 2004-08-31 2004-09-18 황길연 배관재의 현장 접합을 위한 연결 외관, 이를 이용한 배관재의 접합 방법 및 접합 시스템
US20100094392A1 (en) * 2008-10-10 2010-04-15 Edwards Lifesciences Corporation Expandable Sheath for Introducing an Endovascular Delivery Device into a Body

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Publication number Publication date
US20130000868A1 (en) 2013-01-03
WO2013006356A3 (fr) 2013-02-21

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