Category Archives: GORE

Contain Aggressive Media, Protect Glass-Lined-Steel Equipment, Reduce Emissions

Gasket Tape Series 1000

Sealing Challenges

Glass-lined steel equipment is used by chemical processers to deal with aggressive media under demanding conditions. Yet the inherent demands of such systems – high temperatures, alternating system pressures, limited gasket loads and deviation of sealing surfaces – can make it challenging to maintain a tight, lasting seal.

While the Polytetrafluoroethylene (PTFE) material itself offers good chemical resistance, it does not readily conform to flange surface deviations, nor does it resist creep particularly well under low gasket loads. Incorporating compressible materials or fillers into common envelope gaskets or filled PTFE gaskets, offers only a partial solution.

Sealing challenges are even greater when gaskets for large flanges (≥DN 600/ASME 24″) are fabricated offsite. This often results in long lead times, as well as shipping, handling and inventory challenges. These, along with time-consuming and complex installation procedures, can complicate turnarounds or delay start-ups.

The Consequences Of Failure

Any of the mentioned approaches, especially if they involve
inconsistent quality across different gasket brands or product
lines, may lead to premature gasket failure, with consequences
that range from problematic to catastrophic, including:

  • Leakage/emissions
  • Equipment corrosion/damage
  • Production downtime
  • Cost increase
  • Risks to personnel safety

Gore Gasket Tape Series 1000 Addresses All the Challenges of Reliably Sealing Large Glass-Lined-Steel Flanges.

cross section of gore gasket tape 1000Made of 100 % expanded PTFE (ePTFE), this highly conformable gasket tape is chemically inert, and highly resistant to creep, cold flow and clamp-force loss. Its proprietary barrier core maintains an extra tight seal even at low loads.

Endorsed by De Dietrich, a leading manufacturer of glass-lined steel equipment, Series 1000 is optimized for processes utilizing highly aggressive media, as in chemical processing (e.g. specialty chemicals, agricultural products, polymers), mining and minerals. Series 1000 is designed for use in large (≥DN 600/ASME 24″) or non-standard flanges typical of columns, mixer vessels, reactors, storage and receiver tanks.

A Higher-Performance Sealing Solution

leakage rate on a 0.5mm deviationUnique barrier core technology

  • Barrier core engineered to amplify the available load.
  • Seals more than 10 times tighter than other types of ePTFE gasket tape.

Outstanding conformability to deviations

  •  Seals deviations even at low gasket stress.
  • Easily passes the bubble test, for trouble-free mechanical completion (MC) or start-up.

Optimal form for easy handling

  • Gasket can be customized on-site.
  • No fabrication lead-time required.
  • Convenient spool format simplifies and speeds handling & transport.
  • Adhesive backing enables easy installation.
  • Faster, less complicated shimming tape technique for larger deviations.
  • Reduces inventory costs.

Reliable and long-term seal

  • Barrier core creates a tight seal that impedes even highlypermeating media.
  • Provides chemical protection across the full flange width (100% ePTFE).
  • Gasket tape is engineered to resist creep and clamp force loss.
  • Allows full use of specification range of the glass-lined steel equipment.
  • Enables longer maintenance cycles, as demanded by leading chemical producers.

The Gore Sealant Technologies Quality Management System is certified in accordance with ISO 9001.


Original content can be found on Gore’s website.

Gallagher Fluid Seals is an authorized distributor of Gore Tape. For more information about how this solution can help you, contact our engineering department at 1-800-822-4063.

Creating Durable Seals in Glass-Lined Steel Equipment with Gore

A newly developed gasket tape made by Gore – of expanded polytetrafluorethylene (ePTFE) is specifically designed to address the challenges of creating reliable seals in large glass-lined steel equipment.

Equipment made of glass-lined steel is used picture of lining glasswhen manufacturing  or processing aggressive chemicals such as aniline derivatives and sulphuric or hydrochloric acid. The Achilles heel of such systems is the gaskets needed to seal the joints between components. Exposure to aggressive media causes the seals to degrade overtime, resulting in damage to equipment and posing a health risk to operators. Replacing the seals costs a great deal of time and effort, with a corresponding drop in production output.

A newly developed gasket tape made of ePTFE (expanded polytetrafluorethylene) is specifically designed to address the challenges of creating reliable seals in large glass-lined steel equipment.

Operators of chemical plants choose sealing materials according to a wide range of criteria such as process medium, flange type, sealing performance, pressure and heat resistance, cost and longevity. Other important selection criteria include time required for installation and inventory management. And, of course, a plant operations prior gasket experience weighs in as well. Gaskets for glass-lined-steel equipment are safety-relevant parts because their failure can endanger human lives and/or harm the environment, but they are often treated for administrative purposes as C-class items, that is, parts of minor significance.

This classification doesn’t reflect the true importance of these sealants. There is a need for more explicit regulations to supplement the general legislation pertaining to occupational health and safety and the handling of hazardous substances. The introduction of a European-wide regulatory basis for establishing detailed, standard processes would be welcome, for instance with respect to approval procedures and safety. As things stand today, companies are obliged to find their own compromise between varying sets of requirements. These include compliance with EU-wide and national directives concerning environmental protection and occupational health and safety. At the same time, companies are making efforts to augment the reliability of their products, simplify inventory management and installation processes, and reduce downtime and overall costs. An added factor in both cases is specific process requirements with respect to temperature, pressure and media.

SEALING CHALLENGES

One particular challenge is that of choosing the right sealant for glass-lined steel systems, because these involve the use of aggressive media such as aniline derivatives and sulphuric or hydrochloric acid under demanding conditions. Glass-lined steel presents the advantage of being highly resistant to corrosive and/or abrasive media. Other characteristic features of this material are its smooth surface, which is easy to clean due to its low adhesion properties, and its biologic and catalytic inert behaviour. Nonetheless, it can be difficult to achieve reliable seals in glass-lined steel equipment. This is because the glass lining is more brittle than the metal, and can therefore split or splinter if handled incorrectly. As a result, the gasket load that can be applied to the seal is lower than that for an all-steel flange. Consequently, care must be taken to limit the pressure applied when installing gaskets between interconnecting parts of the system.

Another problem is that of achieving a reliable seal if the flange surface is uneven or has surface deviations. Once the glass lining has fused, its surface cannot be reworked. The challenges posed by these characteristics of glass-lined steel, combined with the exposure to aggressive chemicals and high temperatures, must be met by the chosen sealant. In practice, these difficult conditions often lead to premature sealing failure and a greater risk of corrosion. The further consequences of sealing failure include leaks and uncontrolled emissions, damage to equipment, high replacement and repair costs, production losses, unplanned maintenance and downtime, and potential risks to employees’ health and safety.

Continue reading Creating Durable Seals in Glass-Lined Steel Equipment with Gore

What is ePTFE?

ePTFE - Bill Gore & his wife, VieveSince 1958, Gore has developed products that improve lives. At the center of these solutions is polytetrafluoroethylene (PTFE), a polymer with exceptional properties like high tensile strength, a low dielectric constant, UV resistance and many more. In 1969, the possibilities for PTFE expanded with Bob Gore’s discovery of expanded PTFE, or ePTFE.

In the years since, Gore has developed unparalleled expertise in manipulating ePTFE and other fluoropolymers. Gore’s engineers can change a material’s structure, shape, thickness and surface geometry, then pair it with complementary materials to provide the performance qualities required by the application and the customer. The resulting product can be strong or permeable, rigid or flexible, thin or thick — with many additional combinations of properties that can be applied to meet the end use requirements.

Since its very founding, Gore has been passionate about solving the complex challenges of their global customers. From the first suggestion of a product need, to its delivery to market, this passion is apparent in everything Gore does.

  • Curiosity: From keeping water off a person’s skin to preventing leaks from happening in chemical containers, Gore listens to their customers and analyze the challenges to determine the underlying problem.
  • Competency: Gore determines how they can apply their expertise in fluoropolymer science to deliver solutions that are valued and differentiated from the competition.
  • Commitment: Gore rigorously tests their products to ensure they deliver failure-free performance and suit their customers’ needs and applications, the first time and every time.

Continue reading What is ePTFE?

Pipe Gaskets for Diverse Flange Materials

Looking to consolidate your inventory into as few materials or parts as possible?  Would eliminating the installation of incorrect gasketing material interest you?  GORE® Universal Pipe Gaskets may be the answer.

GORE Universal Pipe Gaskets (UPG)GORE® Universal Pipe Gaskets (Style 800) provide a reliable seal for steel, glass-lined steel and fiber reinforced plastic (FRP) flanges, in the full spectrum of strong acid, alkali, and solvent process media, including the most challenging thermal cycling and elevated temperature applications. This single gasket solution can reduce the process safety and production downtime risks caused by the use of an incorrect gasket material. The highly conformable 100% ePTFE also reliably seals irregular surfaces.

Continue reading Pipe Gaskets for Diverse Flange Materials

VIDEO: Sealing Flanges with Surface Deviations

Surface Deviations - Pitted FlangeOver time, and for any number of reasons, flanges are prone to surface deviations.  Damaged areas will tend to create a leak path that the gasket must try to seal.

Flange damage most commonly occurs when removing previously used gasket material from the sealing surface – tools such as chisels, or screw drivers, should be avoided. A brass wire brush is suggested.

The video below proves how well GORE® Gasket Tape Series 500 works on flanges with surface deviations versus a standard filled PTFE gasket.

Continue reading VIDEO: Sealing Flanges with Surface Deviations

VIDEO: Installing GORE® Gasket Tape Series 500

A spool of GORE® Gasket Tape Series 500 provides an immediate, cost-effective solution to sealing challenges that demand reliable performance and extended durability. This advanced product, with Gasket Tape Series 500its industry-leading creep resistance, is designed to maximize the operational reliability of large steel-flanged applications, especially those with thermal cycling.

It eliminates the lag time, costs and complexities associated with engineering, specifying, procuring, shipping, storing and installing traditional one-piece prefabricated gaskets.  It also delivers exceptionally reliable sealing performance, while making multiple gasketing installations faster, more cost-effective and simpler.

Continue reading VIDEO: Installing GORE® Gasket Tape Series 500

GORE® Gasket Tape Gets an Upgrade

GORE® Gasket Tape is a 100% ePTFE form-in-place gasket that delivers worry-free sealing performance for large steel flanges (Series 500) and large glass-lined steel equipment (Series 1000). While this product has a number of advantages, GORE® has now made their gasket tape line even easier to use.


Improved installation-aid adhesive.

GORE® Gasket Tape - New Backer vs. Old BackerGORE® has upgraded the removable adhesive backer on GORE® Gasket Tape Series 500 and Series 1000 to a new higher strength material. This ensures that when the backer is removed at installation, it peels away in one easy-to-remove piece.

Continue reading GORE® Gasket Tape Gets an Upgrade

VIDEO: Gore GFO Fiber vs Graphite/PTFE Packing

When tested alongside generic graphite/PTFE packing, packing made of 100% Gore® GFO® Fiber achieves better results for all key attributes: creep resistance, retention of lubricant, sealability, and stability (shrinkage).

The differences in performances for each generic packings will have an impact on the operational costs.

GORE GFO
Based on calculations for a 100 psi (6.9 bar) pump, 2 inch saft (50 mm); Drip rate 25,000 gallons (94.6 m3)/ year; Packing = $40; Replacement of packing = 3 times per year; kWh = $0.12

 

 

 

 

 

 

Continue reading VIDEO: Gore GFO Fiber vs Graphite/PTFE Packing