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    Expansion Joints: (Plastic) PTFE Teflon-Lined, Rubber, Metal from Ethylene & More- Flexijoint, FlexArmor, Rubber Expansion Joints, Flexible Metal Connectors Back to: All Products > Piping
     
    Expansion Joints / Expansion Bellows & Flexible Connectors
    (PTFE Plastic) Teflon, Teflon-Lined, Flexible Metal, Rubber & More



     
     
     

    Flexijoint®
    Cross-Section

    Ethylene Flexijoint® Teflon-Lined Expansion Joints, Misalignments
    Common
    Misalignments

    Ethylene Flexijoint® Teflon Expansion Joints / Expansion Bellows
    (PTFE Plastic)

    Ethylene's Flexijoint Teflon Expansion Joints are flexible connectors and tremor barriers designed to compensate for misalignments (see graphic on left), absorb expansion and contraction, and isolate vibration and shock in process piping, tanks and pumps. Ethylene expansion joints have a proven record worldwide handling the chemical process industry's most corrosive pipe stress problems. They are formed from isostatically molded, FDA approved, virgin PTFE resin to guarantee product purity and uniform thickness. They also offer a low spring rate to protect stress sensitive FRP, glass or graphite equipment.


    Flexijoint Teflon Expansion Joints have almost universal chemical inertness, high and low temperature resistance, invulnerability to ozone and sunlight, outstanding flex life, and low acoustical impedance (sound dampening properties).
      Click Here to Request a Quote or More Information
      Flexijoint Features:
    • Diameters from 1/2" through 42"
    • 2 through 12 convolutions
    • 150, 300 Class ANSI, J-bolt and other flanging available
    • Full vacuum with Vacuband support rings


    PDF Brochures:
    Ethylene Flexijoint® Teflon Expansion Joints Brochure (PDF)

    Ethylene Flexijoint® Teflon Expansion Joints Engineering Guide (PDF)

    Quick Selection Guides:
    Lengths
    Misalignments

    Vacuum Ratings
    Weight Data
     
    Ethylene Expansion Joint Distinctive Features


    Pure 100% Virgin PTFE Resin
    The unmatched performance of Flexijoint is due to its exclusive Fluoroforming™ process, a development of Ethylene. The Fluoroforming process employs only high molecular weight resin to utilize pure PTFE with no pigments or additives which might contaminate contacting fluids by leaching out, or to be vulnerable to blistering. In addition, high molecular weight with tightly controlled crystallinity, inherent in the Ethylene Fluoroform process, results in lower permeation rates, outstanding flex-life and maximum tensile strength. Competitors which use paste extruded resin are NOT using Pure PTFE. They must mix a hydrocarbon such as Isopar to facilitate PTFE paste extruding.

    T-Band™ Root & Sidewall Support
    Flexijoint T-Band reinforcement on the outside of the convolutions supports the convolution root and sidewall for improved service life and increased safety in high pressure applications. As pressure and temperature increase, the sidewall of the PTFE convolutions conform to the contour of the T-Band, improving stability under pressure.

    LimitLinks™ Protection From Over-Expansion
    LimitLinks consist of stainless steel cables conforming to MIL-C5424, Government specification for Aircraft Cable, at the ends of which are stainless steel ball-shaped terminals are swaged. The opposite ends of the each LimitLink are firmly anchored in the Flexijoint flanges in a manner which limits over expansion of the Flexijoint but also leaves the terminals free to swivel as the flanges change position relative to each other during their adjustment to angular misalignment, parallel misalignment, purely axial motion or a combination of all three.

    Uniform Wall Thickness
    Ethylene’s exclusive Fluorforming™ process guarantees multiple convolution walls of constant uniform thickness for any size. This relationship of heavy wall and geometry is one of the basic reasons for the outstanding performance of Flexijoints. Deep convolutions allow increased axial travel and also reduce the force necessary to produce movement or lateral misalignment. As a result, Flexijoints have a longer service life when compared to conventional blow molded or stretch molded expansion joints which introduce stress points and exhibit alarming thinning of the convolution wall and root. Note: Blow-molding is sometimes referred to as "contour" molding by some manufacturers.

    T-Band™ Protection From Over Compression
    Flexijoint T-Band metal reinforcement on the outside of the convolutions not only contributes to the pressure rating of the Flexijoint but also limits the total axial movement in compression. The shoulders of the T-Band are designed to butt when maximum compression limit has been reached to provide protection from excessive compression for improved safety and increased service life.

    LimitLinks™ & T-Band™ Additional Benefits
    LimitLinks provide easy installation even when the mating flange bolts don’t align. They also won’t get in the way and they never need to be removed for installation unlike competitors LimitBolt designed expansion joints which may void warranties.

    T-Bands cover approximately 75% of the outside of the convolution when not compressed to provide protection from external damage such as falling tools or weld splatter.

     
    Full Face Expansion Joints Broaden Your Connection Options

    Full face flanged expansion joints are available as a special option (pictured at left). The use of the full face connection can be effective in many area, especially when connecting to non-metal piping.



     
    Click Here to Request a Quote or More Information Download Ethylene Flexijoint® Teflon-Lined Expansion Joints (PTFE Plastic) Technical Data/Brochure

    Download Ethylene Flexijoint® Teflon-Lined Expansion Joints (PTFE Plastic) Engineering Guide

    Availability: MI, IA, IL, IN, OH, PA, WI


     
     
     
    Flexijoint® with
    Durcor-62™ Flanges

    Click Here to Request a Quote or More Information
    Ethylene Flexijoint® Teflon Expansion Joints with Durcor-62™ Advanced Composite Flanges

      Features:
    • Flanges are Strong as Steel
    • 1/2 The Weight of Steel
    • Class 150 Rated / ANSI B16.5
    • Lower cost vs. S.S Flg PTFE Bellows
    • Lower Installed Cost
    • Maximum Travel - 2 to 12 Convolutions
    • Size Range 1" - 12"
    • (-)60F to +300F
    • Zero Corrosion Rate Inside & Out
    • 10 Year Flange Warranty
    • Lower Life Cycle Cost - Guaranteed!!!

    • Tensile strength of 50,000psi per ASTM D-638 or 358 Mpa
    • Notched Izod impact strength of 30 ft. lb/inch per ASTM D-256 or 1760 J/M are achieved

    • Thread Strength: Durcor-62™ provides greater than 210 Ft-lbs of thread strength. No need for Alloy Thread Inserts.
    Ethylene Flexijoint® Teflon-Lined Expansion Joints with Durcor-62™ Advanced Composite Flanges - Tensile Strength Comparison

    Advanced Composite Technology
    Durcor-62™ Flanges are manufactured by PureFlex,Inc™ from a proprietary advanced fiber reinforced composite. Durcor-62™ has tensile and compressive strengths that rival steel along with outstanding impact resistance that is unmatched in the industry. Its reinforcing fibers are long and interlocked, this interlocked reinforcement system transfers loads throughout the fiber matrix, making Durcor-62™ Flanges virtually indestructible. The strength of Durcor-62™ enables the Flange to maintain CLASS 150 rating and ANSI B16.5 dimensions. And allows it to be installed in any type of piping system without the need for special considerations. Durcor-62™ Flanges excel in temperatures from (-)60°F to 300°F and has only .001" of thermal expansion across its full temperature range.

    Superior Performance
    Durcor-62™ vinyl ester resin backbone provides excellent protection when exposed to aggressive chemicals and hostile atmospheres such as acid sprays, bleach, salt water and high chlorides. Durcor-62™ Flanges outperform stainless and ductile iron flanges not only in corrosive environments but non-corrosive as well. Its lightweight advantage reduces the need for heavier support structures for hanging, eliminates the need for extra equipment and personnel for pipe and fitting installation and reduces pipe strain once installed. Durcor 62™ Flanges are so dependable and maintenance free that we offer the industry's first "no questions asked" 10 year limited warranty.

    Click Here to Request a Quote or More Information Materials
    • Bellows: Virgin PTFE
    • Flanges: Durcor-62™
    • Advanced Composite T-Bands™: Powder Coated Epoxy DI
    • Option: Composite
    • LimitLinks™: 303 Stainless Conforming to MIL-C5424
    • Option: Monel



    Ethylene Flexijoint® Teflon-Lined Expansion Joints with Durcor-62™ Advanced Composite Flanges Brochure

    Download Ethylene Flexijoint® Teflon Expansion Joints (PTFE Plastic) Engineering Guide
     
     


    Ethylene Flexarmor® (Teflon) PTFE-Lined Metal Bellows Expansion Joints
    Ethylene Flexarmor® Teflon-Lined Metal Bellows Expansion Joints

    Metallic bellows fabricated from stainless steel, Hastelloy, Monel, and Titanium. Lined with high quality isostatically molded PTFE (Teflon) to provide high pressure ratings and superior corrosion resistance.
    • Diameters from 1-1/2" through 42"
    • 150 & 300 Class ANSI flanges
    • Special flanging and geometry also available

    Click Here to Request a Quote or More Information Download Ethylene Flexarmor® PTFE-Lined Metal Bellows Expansion Joints Brochure

    Availability: MI, IA, IL, IN, OH, PA, WI


     
     
    Ethylene Special Flexijoint and Flexarmor Configurations

    Ethylene offers several special Flexijoint and Flexarmor expansion joint configurations including:

    Universal Expansion Joints
    These units combine two Flexijoints with an intermediate PTFE lined spool piece: lateral movements are maximized to provide low spring rates; critical when mating to stress-sensitive graphite, FRP, glass, etc. process equipment.

    Click Here to Request a Quote or More Information Hinged or Pinned & Slotted Joints
    The hinged connection between the flanges provide lateral support while allowing only angular movement of the bellows. Pinned and slotted units provide angular and axial movements with lateral support.

    Gimbal Joints
    Allows full angular freedom while limiting axial and lateral displacements.

    Download Ethylene Flexijoint® Teflon-Lined (PTFE Plastic) Expansion Joints Technical Data/Brochure

    Availability: MI, IA, IL, IN, OH, PA, WI


     
    Rubber Expansion Joints

    Used in piping and ducting systems for motion compensation, stress relief, as well as noise and vibration control.

    Features and Benefits
    • Absorbs all directional movement • Relieves pipe and anchor stress
    • Reduces noise and vibration • Compensates for misalignment
    • High resistance to shock • Cost-effective solution


    Click Here to Request a Quote or More Information Materials of Construction Include:
    EPDM, Neoprene, Chlorobutyl, Hypalon®, Buna-N (Nitrile), Pure Gum Rubber, PTFE (Teflon) Fluoroplastic & Viton®.

    Reinforcements Include:
    Polyester, Nylon, Kevlar®, fiberglass, and steel. *Temperature rating is dependent on both elastomer and reinforcements.
     


    Senior Flexonics Flexible Metal Connectors

    The basic function of flexible connectors is to provide piping systems with the flexibility needed to absorb noise and vibration, compensate for thermal growth, or permit motion of other piping elements.

    Senior Flexonics flexible connectors are a perfect match of style, wall thickness and design to minimize the forces and stress within piping systems. These connectors are factory engineered, manufactured and tested to effectively isolate vibrations transmitted by mechanical equipment. Senior Flexonics can help you comply with noise level requirements by reducing pipe vibration throughout a structure.

    Why Use Senior Flexonics Flexible Connectors?

    Click Here to Request a Quote or More Information
    • Compensates for misalignment - Reduces stresses.
    • Controls vibration - Normal mechanical equipment vibrations are reduced at the connector.
    • Reduces noise - High pipe vibration noise is greatly reduced - often eliminated.
    • All metal construction - Eliminates shelf life problems and allows operation at elevated temperatures.
    • Absorbs thermal growth motion - Excellent protection for adjacent piping and equipment.
    More Info on Senior Flexonics Flexible Metal Connectors

     
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    Lined equipment liner materials include: Plastic, PTFE, TFE, PFA, Teflon®-Lined, Polypropylene, Polypro, EPDM, Rubber Neoprene, Chlorobutyl, Hypalon®, Buna-N (Nitrile), Pure Gum Rubber, Fluoroplastic, Viton®, fiberglass (FRP, GRP, GRE), Polytetrafluoroethylene (PTFE), Perfluoroalkoxy (PFA), Polyvinylidene Fluoride (PVDF), Kynar, Polypropylene (PP), Polyester, epoxy, vinyl ester & More.

    Pumps, Valves, Fiberglass Pipe (FRP), Teflon-Lined Pipe, Hoses, and other Equipment Sizes Include:
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