Tank Products Archive - Mesa ETP

Floating Roof Seals

Bryan Koshover — Mon, 10 Jul 2017 13:25:04 +0000

Home / Tank Products / FLOATING ROOF SEALS

FLOATING ROOF SEALS

Mesa ETP is the exclusive carrier of WG Seals, an industry leader of primary and secondary floating roof seals for aboveground storage tanks. Mesa ETP engineers each product to meet unique circumstances, including floating roof and rim characteristics, tank profile, product stored, schedule and economic situation. WG Seals primary and secondary floating roof seals and foam dams have a proven record of success and are used by most major oil companies.

Compression plate secondary seals, "in service" installation, multiple contact point secondary seals, double wiper tip seals, anti hang-up devices and rim mounted foam dams - now accepted standards in the industry - were all pioneered by Mesa ETP engineers and represent the Best Available Control Technology (BACT). WG Seals has over 4000 primary and secondary floating roof seals installed worldwide.

Download more information on WG Seals from Mesa ETP.

SEAL SELECTION

Primary Seal for Floating Roof Tank
A primary seal should be considered for all floating roof tanks, and listed below are a variety of choices. Mechanical shoe seals and resilient filled seals (i.e. liquid-filled tube seals and foam log seals) are the two main primary seal types. Tube and foam log seals risk "puncture", which would render them useless and represent environmental waste in disposal. They do, however, provide a "soft" connection against the tank which may be beneficial if the inside surface of the tank shell has a finished paint system. A mechanical shoe seal, which generally has a longer life span than either the tube seal or the foam log seal, represents the Best Available Control Technology available today.

Two optional mechanical shoe seals are available; both offering "in-service" installation. The Channel Hanger seal is the more economic system, and is generally utilized in new tank construction and for retrofits where the annulus is in the "normal" range. Where significant out-of-roundness or unusual rim space measurements are found, a Compression Shoe seal is available. The Compression Shoe seal, which can provide a significant force along 90% of the circumference of the tank shell, helps minimize the potential for gaps between the shoe and the tank shell.

Secondary Seal for Floating Roof Tank
Secondary Seals are normally required for external floating roof tanks, and may or may not be required when an external roof covers the floating roof. However, some localities require a secondary seal on a covered floating roof if the primary seal is a vapor mounted seal. Mechanical shoe seals, by their nature, are liquid mounted, and both tube and foam log seals can be liquid mounted. A compression plate secondary seal has a longer life than a "flapper". While the "flapper" offers a lower profile, it may not stand up against the environment of the stored product vapors, and therefore not be an appropriate choice. The Duo-Tip offers a lower profile than the 5" flat wiper when compression plate secondary seals are chosen.

Double Seal Combinations
A variety of double seal combinations exist as a mix-n-match of all available primary and secondary seals shown, as well as Double Wiper Tip seals, which offer a unique selection.

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Considerations for API

The American Petroleum Institute (API) does not define which floating roof seals should be utilized on any particular set of circumstances, but allows the end user to utilize the most appropriate set of floating roof seals. Refer to Standard API 650.

The API has, however, done generic testing for emissions based on the following combinations of seals: Mechanical Shoe Seal, Resilient Filled Seal (both vapor mounted and liquid mounted), along with combinations of these seals with rim mounted secondary seals. The testing concluded that utilization of a liquid mounted primary seal (e.g. metallic shoe seal, or liquid mounted resilient filled seal) in combination with a rim mounted secondary seal provided a significant reduction in emissions when compared to primary seals alone. Refer to API Manual of Petroleum Measurement Standards Chapter 19.1 and 19.2 (formerly API standard API 2517 and API 2519).

Significant Features

• WG Seals is a leading brand of Mesa ETP with over 4000 installations worldwide
• Meets all local and federal codes, including the EPA new source requirements
• Materials available in stainless steel and galvanized, and hardware in corrosion resistant stainless steel or zinc plated materials
• Adaptable to any existing or new floating roof tank rim arrangement
• Compatible with stored product, including 100% aromatics and MTBE
• In-service installation
• No welding or flame cutting
• Ground shunts, as per API 2003
• 35 years of proven comprehensive custom designs
• Simple installation and ease of future maintenance
• Achieves and maintains satisfactory emission controls
• Tight fitting minimum gap seals
• Allows for common mounting hardware for all seals and rim mounted foam dams
• Failure-free durable designs
• On-time delivery

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Floating Roof Pontoon Repair Liners

usdp — Mon, 10 Oct 2016 14:53:36 +0000

Home / Tank Products / Floating Roof Pontoon Repair Liners

Floating Roof Pontoon Repair Liners

Mesa ETP custom designs floating roof pontoon repair liners pontoon liners for floating roof storage tanks. Mesa ETP floating roof pontoon repair liners are inserted into floating roof pontoons that have taken on liquid from the storage tank. The pontoon liner is installed inside the pontoon and inflated to displace product and keep the roof afloat. Mesa ETP’s floating roof pontoon repair liners are most commonly used in pontoons that have begun to leak. Leaking pontoons can fill with product from the tank causing the floating roof to sink. Sunken roofs can cause a range of undesirable situations in the tank. The floating roof can be severely damaged if it sinks into the product. A sinking roof can damage the shell and floor of the tank. Floating roof pontoon repair liners provide additional buoyancy to pontoons, allow for stabilization of the floating roof, help prevent sunken roof, avoid tank and roof damage, avoid environmental hazards or violations, and avoid costly cleanup and decontamination procedures.

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Vapor Bladders

usdp — Mon, 10 Oct 2016 14:53:28 +0000

Home / Tank Products / Vapor Bladder Gas Holder Diaphragm

Vapor Bladder Gas Holder Diaphragm

The Mesa ETP Vapor Bladder is designed for collecting and storing vapor emissions as part of a complete vapor recovery system located in a storage tank terminal or refinery. The system is used to capture emissions during tank truck loading. Emissions are stored in a vapor bladder tank until they can be used or delivered to a burner unit for processing. The vapor bladder serves as an accumulator/surge suppressor/storage unit. The Mesa ETP vapor bladders is installed as either a truncated cone or hemispherical configuration in a steel holding tank. A stabilizing weight is included to ensure the vapor bladder remains in a predictable position. Vapor bladders are constructed of proprietary MesaThane material containing a closely woven nylon fabric for high tensile strength. The material is maximized for chemical resistance, vapor transmission and extreme temperature applications.

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Features

MesaThane

The Mesa ETP vapor bladder is constructed using proprietary MesaThane material offering high tensile strength and chemical resistance.

Long Service Life

Proven service life (under normal operating procedures) of over 10 years in applications including gasoline, MTBE, pure Benzene, Toluene and other products.

Installation

Mesa ETP Vapor Bladders are engineered for a precise fit in the holding tank using information from the customer data sheet.

Vapor Recovery

Designed for collecting and storing vapor emissions as part of a complete vapor recovery system. Emissions are stored until they can be used or delivered to a burner unit for processing.

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Truncated Cone Vapor Bladder

The truncated cone vapor bladder is secured to an attachment bar around the tank shell and to a floating ring, including a stabilizing weight to ensure position.
MesaThane material ensures vapor compatibility and hydrolytic stability on both sides of the bladder. (Other materials available for custom applications).
Effectively operates as a “piston” within the tank eliminating the formation of a vapor and air ignition atmosphere.
Allows continuous measurement of vapor holder gas levels using retractable tape gauges.
Provides the highest percentage of tank volume for vapor capacity in the steel holding tank.

Hemispherical Vapor Bladder

The simple and efficient hemispherical vapor bladder is secured to an attachment bar around the tank wall. Bladder contains a “dollar plate” to maintain position.
MesaThane material ensures vapor compatibility and hydrolytic stability on both sides of the vapor bladder (Other materials available for custom applications).
Easily installed using a minimum of operational components and installation labor.

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Vapor Barrier Fabric

usdp — Mon, 10 Oct 2016 14:53:20 +0000

Home / Tank Products / VAPOR BARRIER FABRIC

VAPOR BARRIER FABRIC

Mesa ETP manufactures multiple variations of two proprietary vapor barrier fabric materials, MesaThane 6036 and Mesalon 7010. Mesa ETP vapor barrier fabric are key components in primary and secondary rim seal systems. Because of their chemical resistance, flexibility and tensile strength Mesa ETP vapor barrier fabric is also used in other emission reduction products including gauge pole covers and leg boots. For more information about the best fabric for your solution, contact us to have a tank expert consult on your project.

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MesaThane 6036

MesaThane 6036FCA is a reinforced premium-grade urethane laminate featuring superior chemical, abrasion, puncture, ozone and U/V resistance. 6036FCA is compatible with 100% aromatic hydrocarbon vapors, gasoline, crude oil and many other chemical solvents. 6036FCA offers excellent tensile strength and flexibility. Applications include floating roof seals, gauge pole covers, leg boots, collapsible storage tanks, vapor bladders, pontoon liners and other custom applications.

Mesalon 7010

Mesalon 7010 is a reinforced polymer laminate designed to provide superior chemical resistance, tensile strength and flexibility. 7010 is well suited for 100% aromatic and chlorinated hydrocarbons, alcohols, ETBE, MTBE, Ethanol, Methanol and other chemicals. Mesalon 7010 is designed to provide maximum performance and service life in applications including floating roof curtain seals, gauge pole covers, roof leg boots (socks) and other seal and emission controls.

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Internal Floating Roof Wiper Seal Systems

usdp — Mon, 10 Oct 2016 14:53:10 +0000

Home / Tank Products / Internal Floating Roof Wiper Seal Systems

Internal Floating Roof Wiper Seal Systems

MesaWedge primary and secondary wiper seal systems are designed to prevent product loss and atmospheric contamination from internal floating roof tanks (IFRT). MesaWedge wiper seal systems meet or exceed environmental regulations and are designed to ensure effective operation in specific tank conditions. Mesa ETP manufactures multiple options of IFRT wiper seals, talk to one of our tank experts to learn more about MesaWedge and which option would be the best fit for your tank.

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MesaWedge SC-1000

MesaWedge SC-1000 is a 65A Duro urethane featuring exceptional abrasion resistance that is unmatched in the industry. It also offers flexibility and chemical resistance to meet the needs of storage applications. SC-1000 may be used as a primary seal system (Single MesaWedge) or combination primary and secondary seal system (Double MesaWedge). SC-1000 is available in a range of widths to accommodate the rim seal space of the tank’s internal floating roof. Factory splicing or field splicing kits are available as well as instructions. Pre-radiused sections are available for tanks under 40 ft in diameter.

MesaWedge SC-1200

MesaWedge SC-1200 is a closed cell foam nitrile/vinyl copolymer designed for an Internal Floating Roof Tank (IFRT) seal. SC-1200 is especially suited for lightweight internal floating roofs of varying sizes. SC-1200 is compatible with 100% pure alcohols, M.T.B.E. and 70% aromatics; excellent hydrolytic stability ensures minimal chemical decomposition (hydrolysis) in water. SC-1200 offers high tensile strength and abrasion resistance while maintaining a lightweight and flexible design. SC-1200 may be used as a primary seal system (Single MesaWedge) or combination primary and secondary seal system (Double MesaWedge). MesaWedge SC-1200 offers vapor tight splicing options that maintain the integrity of the seal around the tank diameter

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Leg Boots

usdp — Mon, 10 Oct 2016 14:52:48 +0000

Home / Tank Products / Floating Roof Support Leg Boots

Floating Roof Support Leg Boots

Mesa ETP floating roof support leg boots (floating roof support leg socks) are designed to reduce emissions and product loss caused by vapors escaping from floating roof support legs. Mesa ETP floating roof support leg boots are made with innovative MesaThane 6036 urethane seal material to form a covering for the support legs. (Mesalon 7010 is available for ethanol applications). The floating roof support leg boot provides excellent chemical resistance against products in the tank while resisting the harshest environmental conditions outside the tank. The floating roof support leg sock ID is determined by the roof support leg handle type, pin length and leg sleeve OD. Mesa ETP designs floating roof support leg boots according to specifications stated on the data sheet, which is completed by the customer. In addition to emission reduction, Mesa ETP floating roof support leg boots helps prevent corrosion by preventing rainwater from entering and collecting in the floating roof support leg. This is an additional benefit to the tank owner, and an exclusive feature of Mesa ETP floating roof support leg boots.

Here is a video of our Stand-Up Leg Boots.

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FEATURES

Reduce emissions from floating roof support legs
Meet or exceeds environmental regulations
Compatible with crude, gas online diesel, jet fuel, aromatics, neat M.T.B.E. and gasohol
Resist U/V, water and ozone effects from outside tank
Can be installed while tank is in-service
Very easy to install and remove
May be used with either “U-type” or “T-bar” leg handles
Standard sizes, configurations and custom designs are available
Seams are R/F factory welded

VAPOR REDUCTION

The interior and exterior of the floating roof support leg boot work together to provide resistance against product loss as well as environmental effects from outside the tank. Mesa ETP floating roof support leg boots are made of MesaThane 6036 laminated thermoplastic urethane (TPU) material. MesaThane features the highest abrasion resistance available in the industry to ensure maximum service life.

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Vapor Guard Gauge Pole Cover

usdp — Mon, 10 Oct 2016 14:52:41 +0000

Home / Tank Products / Vapor Guard® Gauge Pole Cover

Vapor Guard® Gauge Pole Cover

The VAPOR-GUARD® VT Gauge Pole Cover is designed to reduce emissions from aboveground storage tank slotted gauge poles / guide poles. Tank owners benefit by reducing product loss while meeting environmental regulations. Mesa ETP engineers and fabricates each gauge pole cover according to specific installation conditions within tank parameters. VAPOR-GUARD® VT gauge pole cover is field-tested and approved, featuring over 10 years of proven performance. All covers are manufactured in the USA within a Quality Management System (QMS) that is ISO 9001:2008 certified. The VAPOR-GUARD® VT gauge pole cover “flexible enclosure system” is approved by the US Environmental Protection Agency (EPA) as stated in the Storage Tank Emission Reduction Partnership Program (STERPP). This program allows a “flexible enclosure device that completely encloses the slotted guide pole and a cover on top of the guide pole.”

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Features

REDUCES EMISSIONS

Significantly reduces product emissions meeting or exceeding environmental regulations.

CHEMICAL & UV RESISTANT

Made with MesaThane 6036 urethane seal material.

RADAR GAUGE APPROVED

Allows for the unobstructed use of the interior diameter of the guidepole.

EASY INSTALLATION

Designed to be easily installed, even while tank remains in service.

CUSTOM ENGINEERED

Manufactured per order to ensure effective operation and proper match to size of guidepole and product contents of tank.

SERVICE LIFE

Field tested, featuring over 10 years of proven performance. All covers are manufactured under ISO 9001:2008 certification.

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REDUCE EMISSIONS

VAPOR-GUARD® VT is the original Gauge Pole Cover design, developed by Mesa ETP for aboveground storage tank emissions reduction. It features an exclusive collapsible design to ensure the cover expands and collapses causing no interference with the floating roof. The “VT” proprietary closure provides means of installation while tank is in service and provides a superior vapor reduction design. MesaThane laminated urethane material is a standard component in the design of VAPOR-GUARD® VT Gauge Pole Covers. MesaThane offers superior abrasion resistance, flexibility, chemical and U/V resistance. Other materials are available to meet specific tank conditions.

RADAR GAUGING

Tank owners and engineers utilizing radar gauging systems on new tank construction or as part of a retrofit to their gauging operations can benefit by using Mesa ETP VAPOR-GUARD® VT Gauge Pole Covers. Mesa ETP VAPOR-GUARD® VT allows for the unobstructed use of the interior diameter of the guide pole.

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Gauge Pole Ladder Cover

usdp — Wed, 05 Oct 2016 15:55:20 +0000

Home / Tank Products / Vapor Guard® Gauge Pole Ladder Cover

Vapor Guard® Gauge Pole Ladder Cover

Mesa ETP Vapor Guard® gauge pole ladder cover is an innovative solution to emission reductions in internal floating roof tanks (IFRT). Gauge pole ladder covers greatly reduce hydrocarbons from escaping through slots in slotted gauge poles. Tank owners benefit by reducing product emissions while meeting environmental regulations. The Mesa ETP gauge pole ladder cover is manufactured using MesaThane© 6036 urethane seal material to form a casing around the slotted gauge pole ladder. (Mesalon© 7010 is available for specialty applications). The optional transition box provides a seal at the ladder negotiator area on top of the floating roof.

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Features

REDUCES EMISSIONS

Significantly reduces product emissions meeting or exceeding environmental regulations.

CHEMICAL & UV RESISTANT

Made with MesaThane 6036 urethane seal material.

RADAR GAUGE APPROVED

Allows for the unobstructed use of the interior diameter of the guidepole.

EASY INSTALLATION

Designed to be easily installed, even while tank remains in service.

CUSTOM ENGINEERED

Manufactured per order to ensure effective operation and proper match to size of guidepole and product contents of tank.

SERVICE LIFE

Field tested, featuring over 10 years of proven performance. All covers are manufactured under ISO 9001:2008 certification.

Talk to a Tank Expert

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BACKGROUND

Federal Register (65 FR 19891) specifies the “flexible enclosure system” as a pre-approved technology for the control of emissions from Slotted Gauge Poles. Regulations also state “no readily observable emission pathway” allowed for slotted guidepole. (65 FR 2336). Mesa ETP Gauge Pole Ladder Covers are at the forefront of this technology.

BENEFITS

• Significantly reduces product emissions
• Meets or exceeds environmental regulations
• Installs while tank remains in-service
• Allows gauging and sampling equipment to operate
• Excellent chemical resistance
• Collapsible design provides flexibility
• Includes zipper for easy installation
• Easily lowers for use of the ladder
• Custom engineered to ensure effective operation
• Provides efficient and economical solution

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Foam Delivery System

usdp — Fri, 30 Sep 2016 16:52:23 +0000

Home / Tank Products / Foam Delivery Fire Suppression System

Foam Delivery Fire Suppression System

The Mesa ETP foam delivery fire suppression system is an efficient method to extinguish rim fires on floating roof storage tanks located in refineries, pipelines and tank terminals. Mesa ETP’s foam delivery fire suppression system is designed to provide fast delivery of fire extinguishing foam through pipelines in the center of the tank and directly out to the tank rim areas. The standard Mesa ETP foam delivery fire suppression system is designed using RESIST-ALL-CLAD® Flexible Pipe. RESIST-ALL-CLAD® is designed for continuous service in a wide range of pH solutions and chemicals. It is completely compatible with pure M.T.B.E., 100% aromatic hydrocarbons, pure alcohol, gasoline and jet fuels. RESIST-ALL-CLAD® features a fully controlled, repetitive lay pattern (multiple coil). RESIST-ALL-CLAD® assemblies offer a service life expectancy of up to 20 years provided the system is sized, installed and operated in the designed service. RESIST-ALL-CLAD® features a tether system that keeps the drain in position as installed. Tethers are attached to the underside of the floating roof and between ballasts on the flexible pipe for a precise lay pattern.

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Foam Delivery System Design

A.

From the proportioning and pumping equipment positioned outside the dike wall, a high back pressure foam generator is used to direct fire extinguishing foam through rigid pipe to the base of the tank shell. The pipe passes through the tank shell and extends to a point near the center of the tank.

B.

Mesa ETP's RESIST-ALL-CLAD® smooth bore flexible foam line is attached to the rigid pipe within the tank and is connected to a double flanged spool piece mounted to the roof.

C.

On top of the roof, a multiple port foam distribution manifold is mounted to the spool piece. This manifold is sized according to NFPA guidelines, which determine the required G.P.M. and number of discharge outlets for the tank’s diameter and seal rim space area.

D.

From the distribution manifold outlets, flex-connectors and radial piping are used to transport the foam across the floating roof directly to the rim seal area regardless of the position of the roof.

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Roof Seal Area Guidelines

Consult NFPA 11 Standard for Low-, Medium-, and High-Expansion Foam, which covers the design, installation, operation, testing, and maintenance of low-, medium-, and high-expansion and compressed air foam systems. The primary and secondary roof seal area is a critical point in the system design. Above seal applications require a foam dam and normally a longer discharge time. If the tank is equipped with a secondary seal made from a non-combustible material, the foam can be discharged below the secondary seal and will not require a foam dam. This enables the system to discharge 100% of the foam over the rim seal area in the shortest time.

Benefits to Mesa ETP Foam Delivery Fire Suppression System

• Ensures rapid response
• Directly delivers foam to rim area
• EFRT and IFRT compatible
• Operates with minimal maintenance
• Reduces risk of serious property damage or injury
• Provides economical solution
• Engineered to NFPA guidelines
• Integrates with tank design

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Pontoon Skimmer System

usdp — Fri, 30 Sep 2016 16:51:31 +0000

Home / Tank Products / Pontoon Oil Skimmer System

Pontoon Oil Skimmer System

Mesa ETP oil skimmer systems are a proven solution for draining a light liquid product off the top of a heavier product in a cone or dome roof storage tank. The skimmer floats on the top product (ex. oil over water) to collect the lighter of two non-mixable liquids. The liquid is then drained through Mesa ETP’s RESIST-ALL-CLAD® flexible pipe and out of the tank through the shell nozzle. RESIST-ALL-CLAD® features high aromatic resistance and a smooth internal fluidway for maximum liquid flow. Skimmer components are made of stainless steel to perform in the most corrosive product environments. The vortex breaker at the intake fitting ensures optimal flow as the fluid starts into the skimmer conduit. The intake is adjustable during installation. Oil skimmer systems are engineered using information from the customer supplied data sheet. For more information on flow rates, chemical resistance and production application of the pontoon skimmer systems contact us to talk to a tank expert.

Mesa ETP skimmer systems can also be adapted for use in internal floating roof tanks as well as external floating roof tanks. Instead of using pontoons to float on the liquid, Mesa ETP floating roof skimmers are attached to the roof to keep the intake-to-roof distance constant.

For more information about Mesa ETP floating roof skimmer systems, talk to a tank expert.

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Features

Stainless pontoons

Stainless steel pontoons ensure proper flotation of entire assembly. All oil skimmer components are designed to pass through a 20” or 24” manway

Vortex Breaker

Intake fitting is equipped with a stainless steel vortex breaker to induce optimum flow

ANSI raised face flanges

Floating 150 lb. ANSI raised face flanges and nylon coated steel fittings

Flexible pipe

Flexible pipe has a negative buoyancy in all storage products, including light chemicals and heavy crude oil

Shell nozzle

Shell nozzle and/or sump nozzle spool piece can be straight sections of piping for roof drain service temperatures below 32°F (0°C)

Tether System

Mesa ETP Pontoon Skimmers with RESIST-ALL-CLAD® utilize a multiple-coil design to provide a fully preformed, controlled and repetitive lay pattern that does not slide on the tank floor. The tether system ensures that the coils will not stray from designed installation pattern.

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SMOOTH INTERNAL FLUIDWAY

RESIST-ALL-CLAD® features a smooth internal fluidway offering fast flow rates and efficient drainage. It does not include internal corrugation, which could trap sediment or cause flow restricting turbulence.

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