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HomeMy WebLinkAboutLog110 Your CORnection to the Future™ Flexible Expansion Joint . For use on water or wastewater pipelines subject to hydrostatic EeE IVEDpressure and tested in accordance with either AWWA C6QO.9(G ASTM D2774. LV OCT 2 5 2005 #__--1\..SL- ,f-'-."" f,:)~;oe .~L (1,10.... JEffERSON COUNl'i DeD ' vot1 ,-' ' " Copyright 2005 @ EBAA IRON, INC. FLEX-TEND, 12" Double Ball with Flanged Ends FLEX- TEND used as protection on Bridge Crossings, U.S. Patent No. 0305-5-K 4,776,617 A. AWWA MEMBER ~ APPROVED Features and Application: · Sizes 3 inch through 48 inch. · For Ductile Iron, steel, or PVC pipelines. . Constructed of ASTM 65-45-12 Ductile Iron. · Up to 200 Deflection per ball. · Additional Expansion Sleeves can be added for increased expansion capacity. · Each unit tested to rated working pressure prior to shipment. . Due to the design of the seals, no periodic maintenance is required. · Flanged, Mechanical Joint, or combination connections. . Mechanical joint end connections conform to the dimensional requirements of eitherANSIjAWWA C111jA21.11 or ANSIjAWWA C153jA21.53 depending on size. . Flange outlets conform to the dimensional requirements of ANSIjAWWA C110jA21.10 (class 150) with addition of an O-ring which is provided to ensure a watertight seal. · FLEX-TEND assemblies are suitable for direct burial. Poly- ethylene wrap is provided with each unit. If installed in .a vault, the design must be such that movement is not impeded. FLEX-TEND Sample Specification (The text of the specifications below can be copied and pasted from \vww.ebaa.com/downloadIFLEX-TEND.doc) 1. Flexible expansion joints shall be installed in the locations indicated on the drawings and shall be manufactured of 65- 45-12 ductile iron conforming to the material requirements of ASTM A536 and ANSIj AWWA C153j A21.53. Foundry certification of material shall be readily available upon request. 2. Each flexible expansion joint shall be pressure tested prior to shipment against its own restraint to a minimum of 350 psi (250 psi for flexible expansion joints 30 inches diameter and larger.) A minimum 2:1 safety factor, determined from the published pressure rating, shall apply. Factory Mutual Approval for the 12 inch and smaller sizes is required. 3. Each flexible expansion joint shall consist of an expansion joint designed and cast as an integral part of a ball and socket type flexible joint, having a minimum per ball deflection of: 200, 3" - 12"; 150, 14" - 36"; 120, 48" and 4-inches minimum expansion. Additional expansion sleeves shall be available and easily added or removed at the factory or in the field. Both standardized mechanical joint and flange end connections shall be available. 4. All internal surfaces (wetted parts) shall be lined with a minimum of 15 mils of fusion bonded epoxy conforming to the applicable requirements of ANSIj AWWA C213 and shall be holiday tested with a 1500 volt spark test conforming to said specification. Sealing gaskets shall be constructed of EPDM. The coating and gaskets shall meet ANSIjNSF-61. 5. All external surfaces shall be coated with a catalyzed coal tar epoxy conforming to the material requirements of AWWA C210. Appropriately sized polyethylene sleeves, meeting ANSIjAWWA C105jA21.5, shall be included for direct buried applications. 6. Manufacturer's certification of compliance to the above standards and requirements shall be readily available upon request. The purchaser (or owner) shall reserve the right to inspect the manufacturer's facility for compliance. All flexible expansion joints shall be FLEX-TEND as manufactured by EBAA Iron, INC. Eastland, TX., U.S.A. * Deflection in degrees per Ball Joint. ** The expansion values listed in both tables represent the total available movement for the particular size and configuraJio~srf~fl>e, Flex-Tend assemblies are preset at factory to reserve 75% of the total movement for expansion and 25% for contractio~\.)'-? ... - v, "Laying, Total, and CL" lengths listed in both tables, reflect the standard 75% / 25% preset condition, Modifying thitreset @ti.Q,~CQ> corresponding modification of these lengths. Pag~a.._,_2._~_ot".._--_.. EBAA Iron INC, reserves the right to revise and improve its products as necessary. This brochure describes the status of these products at time of publication and may not reflect their status in the future, Pipelines crossing unstable terrain such as faults, swamps or landfills all suffer some degree of vulnerability to damage from ground motion. This motion can be either gradual or sudden, and places damaging shear and bending forces on pipelines. In areas close to, or within structures where differential movement can occur, pipelines should be restrained and supported to isolate and accommodate movement in a controllable manner at a designated location. FLEX-TEND flexible expansion joints provide pipeline protection from the stresses produced by these forces with their ability to deflect up to 20 degrees per ball, in any direction, while simultaneously expanding or contracting. They are available in sizes from 3 inches to 48 inches and can be used on ductile iron, steel, or PVC pipelines for: Connection to buildings, tanks, and other structures Underground to aerial transitions such as bridges Areas of anticipated ground movement and unstable soils Areas near roadways and dams Active faults crossings and liquefaction zones The FLEX-TENDS are available with both flange and mechanical joint end connections for adaptable protection for pipelines, pumps, bridge crossings, tank connections and many other critical installations, either above or below ground. Sizes of 3-inches through 24- inches are rated for 350 psi working water pressure. Sizes of 30 inches and larger are rated for 250 psi working water pressure. Standard Unit Expansian ~ Plus One Add/tonal Expansion Sleeve ~. ,,- ,,----,-,-, ,- h t -- I I I I Each assembly is hydrostatically tested to its rated pressure, prior to shipment Fusion Bonded Epoxy On All Wetted Parts And Sealing Surfaces Gaskets: No Maintenance Required LO # -----\,.lJ~or~... Plus Two Add/tonal Expansion Sleeves FLEX-TENDS are manufactured entirely of ductile iron, conforming to all applicable requirements of ANSI/ AWWA C153/ A21.53 and FLEX- TENDS are totally protected from internal corrosion with a lining of fusion-bonded epoxy. FLEX-TEND flexible expansion joints are available in double ball or single ball configurations. Double- ball units offer the unique ability to accommodate a considerable degree of close-coupled vertical subsidence and will deflect up to 20 degrees per ball in any direction. Single-ball configurations are ideally suited for the protection of pumps and valve installations inside buildings, and in line pipeline protection, by deflecting up to 20 degrees in any direction. Expansion/contraction capability is cast as an integral part of the ball and socket, and can be adjusted with additional sleeves installed at the factory prior to shipping or in the field at a later date. The use of additional sleeves increases both the axial movement and the available offset. Notes on Thrust Forces and Restraints 1. Because the FLEX-TEND flexible expansion joint incorporates an expansion joint with the ball and socket flexible ends, it behaves similary to other expansion joint products under pressure. Due to their design, expansion joints generate end thrust when subject to internal pressure, as seen in Figure 1.1.This end thrust must be accounted for in pipeline design. The end thrust generated by the FLEX-TEND flexible expansion joint is calculated by multiplying the internal pressure (psi) by the area listed in Table 1.1 2, When used in a long and relatively straight pipeline, the pipe-to-soil friction is generally sufficient to balance the force. The use of thrust blocks or other means of anchoring may be required when fittings are placed in close proximity to the expansion joint underground. This protects the pipeline from the tendency of the unit to expand when pressurized. In an above ground installation such as a bridge application, some means must be provided to prevent the expansion of the joint due to internal pressure. This can be accomblished by anchoring the piping to the structure while allowing room for movement when motion occurs. 3. In order for the FLEX-TEND expansion joint to protect pipline connections, any load must be transferred to the unit by the restrained joints. Depending on the piping arrangement and the anticipated movement of the pipelines, adjacent piping must be restrained to adequately transfer the loads to the unit. Joint restraint is provided with each mechanical joint end connection. The Table 1.2 lists some of the restraint products offered by EBAA as well as the pipe material on which each is used. 12.3 1,845 3 inch. 48 inch 3 inch. 24 inch 37.4 10 14,520 96.8 14 35,670 237,8 18 54,960 366.4 24 78,420 522.8 36 172,815 1,152,1 Thrust Force ..(= p.A) Thrust Force (= P'A)~ Restrained Joints Figure 1.1 4. Weld-on flanges are generally used for applications on steel piping. For other piping materials please contact EBAA. For technical information call EBAA Engineering, 800.633.9190.