Flexible Expansion Joint - PDF document

Notes on ThrustForces and RestraintsBecause the FLEX-TEND and EX-TEND both incorporate an expansion joint, it behaves similar to other expansion joint 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 either the FLEX-TEND or EX-TEND is calculated by multiplying the internal pressure (PSI) by the area listed in Table 1.1.When used in a long and relatively straight pipeline, the pipe-to-soil friction is generally suf�cient to balance the force. The use of thrust blocks or other means of anchoring is required when �ttings 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 accomplished by anchoring the piping to the structure while allowing room for movement when motion occurs. EBAA’s thrust or Force Balanced FLEX-TEND models that do not generate axial thrust under water pressure.In order for the FLEX-TEND and EX-TEND to protect pipeline connections, any load must be transferred to the unit by the 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 Iron, Inc. as well as the pipe material on which each is used.Weld-on �anges are generally used for applications on steel piping. For other piping materials please contact EBAA. For technical information call EBAA Engineering at 800.633.9190. Table 1.1Thrust @ 150 664.51,84518.12,71537.45,61064.39,64514,520136.9237.8237.818120,6451,152.1172,8151,555.32,027.0 Table 1.2Mechanical Joint RestraintsMaterialRestraintProductDuctile IronSeries 11003 inch - 24 inchPVC Figure 1.1Thrust Equation: T = PAT = Thrust Force, lbs.P = Hydrostatic Test Pressure (PSI), in FLEX-TEND Single Ball Submittal Reference Drawing - M.J. by M.J.NOTE: All dimensions listed in brochure are in inches and subject to change without notice.The expansion values listed represent the total movement for the particular size and con�guration. Unless otherwise speci�ed, FLEX-TEND assemblies are preset at factory to reserve 50% of total movement for expansion and 50% for contraction.“Laying, Total, and CL” lengths re�ects the standard 50% / 50% preset condition. Modifying the preset ratio requires a corresponding modi�cation of these lengths. Nominal Pipe Total LengthLaying LengthWeight (lbs.)Number115403M10160403M1128.15 (±2.0)23.15 (±2.0)115404M1010.85159404M1129.21 (±2.0)24.46 (±2.0)150406M1038.74 (±4.0)211406M1157.77 (±6.0)27231.98 (±2.0)408M1014.824.9144.08 (±4.0)319408M1166.18 (±6.0)61.18 (±6.0)412410M1018.036.18410M1161.20 (±6.0)607410M1231.21 (±2.0)416412M106.8447.16 (±4.0)564412M1167.98 (±6.0)63.11 (±6.0)711412M1250.10 (±4.0)43.10 (±4.0)414M107.0076.60 (±8.0)1,110414M11103.00 (±12.0)1,398414M12840416M1010.3084.00 (±8.0)77.00 (±8.0)1,172416M11112.00 (±12.0)105.00 (±12.0)1,504416M1247.30 (±4.0)1,154418M101881.50 (±8.0)74.50 (±8.0)1,547418M11108.60 (±12.0)101.60 (±12.0)1,939418M1247.50 (±4.0)1,226420M1010.4081.50 (±8.0)74.50 (±8.0)1,650420M11109.00 (±12.0)102.00 (±12.0)2,0742,321424M1037.3013.803,018424M11115.00 (±12.0)108.00 (±12.0)3,737424M12 FLEX-TEND Double Ball Submittal Reference Drawing - M.J. by M.J.NOTE: All dimensions listed in brochure are in inches and subject to change without notice.The expansion values listed represent the total movement for the particular size and con�guration. Unless otherwise speci�ed, FLEX-TEND assemblies are preset at factory to reserve 50% of total movement for expansion and 50% for contraction.“Laying, Total, and CL” lengths re�ects the standard 50% / 50% preset condition. Modifying the preset ratio requires a corresponding modi�cation of these lengths. Nominal TotalLaying (Offset)Weight Number21.30 (±2.0)7.7517651.00 (±4.0)13.28221403M2161.30 (±6.0)51.75 (±6.0)18.8422.81 (±2.0)15210.8550.24 (±4.0)45.24 (±4.0)14.39404M2153.31 (±6.0)24837.11 (±2.0)32.11 (±2.0)21351.39 (±4.0)37.98 (±4.0)14.36274406M2119.9341.41 (±2.0)36.41 (±2.0)31114.824.9158.51 (±4.0)53.51 (±4.0)16.31408M2175.61 (±6.0)70.61 (±6.0)22.8449745.74 (±2.0)40.74 (±2.0)10.39475410M2018.036.1861.54 (±4.0)44.18 (±4.0)16.48612410M2177.34 (±6.0)22.57410M2248.91 (±2.0)43.91 (±2.0)30.24 (±2.0)11.03587412M206.8464.86 (±4.0)46.19 (±4.0)17.17412M2180.81 (±6.0)75.81 (±6.0)62.14 (±6.0)23.31412M2265.10 (±4.0)58.10 (±4.0)44.00 (±4.0)11.791,222414M207.0091.50 (±8.0)84.50 (±8.0)18.891,510414M21117.90 (±12)110.90 (±12)1,798414M2274.00 (±4.0)67.00 (±4.0)12.411,133416M2010.30101.50 (±8.0)94.50 (±8.0)74.20 (±8.0)19.881,465416M21102.10 (±12)27.361,797416M2271.90 (±4.0)47.10 (±4.0)1,760418M201892.10 (±8.0)74.10 (±8.0)19.862,153418M21119.20 (±12)101.10 (±12)27.09418M221,87410.40101.00 (±8.0)94.00 (±8.0)19.61420M21121.00 (±12)100.40 (±12)2,72187.00 (±4.0)13.993,183424M2037.3013.80114.00 (±8.0)107.00 (±8.0)21.30424M21141.50 (±12)134.00 (±12)106.80 (±12)424M22 FLEX-TEND Single Ball Submittal Reference Drawing - Flange by FlangeNOTE: All dimensions listed in brochure are in inches and subject to change without notice.The expansion values listed represent the total movement for the particular size and con�guration. Unless otherwise speci�ed, FLEX-TEND assemblies are preset at factory to reserve 50% of total movement for expansion and 50% for contraction.“Laying, Total, and CL” lengths re�ects the standard 50% / 50% preset condition. Modifying the preset ratio requires a corresponding modi�cation of these lengths. Nominal Pipe Laying LengthWeight (lbs.)Number118403F1041.80 (±4.0)163403F11112404F1010.85157404F1127.39 (±2.0)152406F106.1741.67 (±4.0)213406F11274243408F1014.826.9147.08 (±4.0)408F1164.18 (±6.0)410F1018.038.21410F1164.39 (±6.0)410F12412F109.31616412F11763412F12414F1013.674.40 (±8.0)1,168414F11101.00 (±12.0)1,454414F12911416F1013.681.50 (±8.0)1,243416F11109.50 (±12.0)1,575416F121,231418F101813.91,624418F11107.40 (±12.0)2,016418F121,277420F1011.477.00 (±8.0)1,700420F11104.50 (±12.0)2,11157.00 (±4.0)424F1037.315.584.50 (±8.0)424F11112.00 (±12.0)424F1267.10 (±5.0)430F1044.116.7101.50 (±10.0)430F11135.80 (±15.0)71.90 (±5.0)4,718436F1017106.50 (±10.0)6,136436F11141.00 (±15.0)Call for Availability67.112,016448F10 FLEX-TEND Double Ball Submittal Reference Drawing - Flange by Flange*Two inch unit can be ordered with additional sleeves to increase expansion/contraction capacity.The expansion values listed represent the total movement for the particular size and con�guration. Unless otherwise speci�ed, FLEX-TEND assemblies are preset at factory to reserve 50% of total movement for expansion and 50% for contraction.“Laying, Total, and CL” lengths re�ects the standard 50% / 50% preset condition. Modifying the preset ratio requires a corresponding modi�cation of these lengths. NominalLaying Length(Offset)WeightNumber6.14 (+2.75, -1.25)21.50 (±2.0)7.5191403F2117.922.81 (±2.0)16110.8514.39210404F2164.54 (±6.0)55.31 (±6.0)6.1737.98 (±4.0)14.36406F2164.61 (±6.0)19.9340.41 (±2.0)14.826.9157.51 (±4.0)16.31408F2174.61 (±6.0)22.8444.80 (±2.0)10.39510410F2018.038.2144.18 (±4.0)16.48648410F2176.40 (±6.0)22.57410F2230.24 (±2.0)11.03694412F209.3164.81 (±4.0)46.19 (±4.0)17.17841412F2180.76 (±6.0)62.14 (±6.0)23.31412F2264.50 (±4.0)44.00 (±4.0)11.791,329414F2013.618.891,616414F21117.40 (±12.0)1,904414F2212.411,205416F2013.6101.50 (±8.0)74.20 (±8.0)19.881,537416F21102.10 (±12.0)27.361,869416F2247.00 (±4.0)1,905418F201813.974.10 (±8.0)19.86418F21127.00 (±12.0)101.10 (±12.0)27.09418F221,93411.419.61420F21100.40 (±12.0)13.99424F2037.315.5110.5 (±8.0)21.3424F21137.5 (±12.0)106.8 (±12.0)424F2217.55,04744.116.7133.0 (±10.0)99.0 (±10.0)6,047430F21167.0 (±15.0)132.0 (±15.0)35.3797.0 (±5.0)16.887,11817131.00(±10.0)97.0 (±10.0)8,537436F21165.0 (±15.0)131.0 (±15.0)35.121.56158.8 (±12.0)113.8 (±12.0)23.0114,172442F2067.1158.8 (±12.0)113.8 (±12.0)29.1317,148448F20 DETAIL BSCALE 1.25 : 1 D5 GROOVE RADIUS D1 D2 ID D3 D4 B FLEX-TEND, EX-TEND, AND FLEX-900 O-ring Groove Sample Speci�cation – FLEX-TEND®1.Flexible expansion joints shall be installed in the locations indicated on the drawings and shall be manufactured of ductile iron conforming to the material requirements of ASTM A536 and ANSI/AWWA C153/A21.53. Foundry certi�cation of material shall be readily available upon request.Each �exible expansion joint shall be pressure tested prior to shipment against its own restraint to a minimum of 350 psi (250 psi for �exible expansion joints 2 inch and 30 inch diameter and larger.) A minimum 2:1 safety factor, determined from the published pressure rating, shall apply. Factory Mutual Approval for the 3 inch through 12 inch sizes is required.Each �exible expansion joint shall consist of an expansion joint designed and cast as an integral part of a ball and socket type �exible joint, having a minimum per ball de�ection of: 20º, 2” - 12”; 15º, 14” - 36”; 12º, 42”-48” and 4-inches minimum expansion. Additional expansion sleeves shall be available and easily added or removed at the factory or in the �eld. Both standardized mechanical joint and �ange end connections shall be available.All internal surfaces (wetted parts) shall be lined with a minimum of 15 mils of fusion bonded epoxy conforming to the applicable requirements of ANSI/AWWA C213. Sealing gaskets shall be constructed of EPDM. The coating shall meet ANSI/NSF-61.Exterior surfaces shall be coated with a minimum of 6 mils of fusion bonded epoxy conforming to the applicable requirements of ANSI/AWWA C116/A21.16.Appropriately sized polyethylene sleeves, meeting ANSI/AWWA C105/A21.5, shall be included for direct buried applications.7.Manufacturer’s certi�cation 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 �exible expansion joints shall be FLEX-TEND as manufactured by EBAA Iron, INC. Eastland, TX., U.S.A.A Microsoft Word Doc Version of this speci�cation is available at www.ebaa.com O-ring Part Number4.1850.1756.1608.27010.10010.16011.00098301014.30013.10098301214.26016.20015.00098301416.48018.50016.9000.1259830161818.56019.1000.12598301821.4000.12524.68027.2000.12598302431.7000.12537.0400.12544.0801.2500.1251.2500.1251.000Note: Dimensions are in inches (± 1%) and are subject to change without notice. Pipeline Protection from ground Motion and ShearPipelines crossing unstable terrain such as faults, swamps or land�lls 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 FLEX-TEND �exible expansion joints provide pipeline protection from the stresses produced by these forces with their ability to de�ect up to 20 degrees per ball, in any direction, while simultaneously expanding or contracting. They are available in sizes from 2 inches to 48 inches and can be used on ductile iron, steel, or PVC pipelines for:Connection to buildings, tanks, and other structuresUnderground to aerial transitions such as bridgesAreas of anticipated ground movement and unstable Areas near roadways and damsActive faults crossings and liquefaction zonesThe FLEX-TENDS are available with both �ange 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 rated for 250 psi working water pressure.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 �exible expansion joints are available ball units offer the unique ability to accommodate a considerable degree of close-coupled vertical subsidence and will de�ect up to 20 degrees per ball in any direction. Single-ball con�guations can be used in pairs with a spool piece between them to increase the offset between the two ball ends.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 �eld at a later date. The use of additional sleeves increases both the axial movement and the available offset. The expansion pre-sets shown in the following tables can easily be changed by the purchaser during his purchase order or later in Important Notes The �anged outlets have dimensions according to ANSI/AWWA C110/A21.10 with each �ange to ensure a proven watertight seal to the rated pressures listed in this brochure. For a reliable seal it is important that the O-ring fully bear against a uniform, �at surface. Therefore, the mating �ange should, at a minimum, be �at between the D1 and D2 dimensions listed in the following table. If an alternate gasket is required, it is possible to special order the unit with a �at face in lieu of the O-ring groove and seal.When connecting a FLEX-TEND to HDPE pipe, a �anged end connection is required. This is to be joined to a fused �ange adapter on the HDPE pipe. A �ller �ange between the two gaskets is necessary to assure proper seal contact.The installation of a d Flex-Tend requires the restraint of all adjacent pipe joints to transfer expansion/contraction forces to the unit and prevent separation of the adjacent joints. Lock-ring type pipe and �tting joints are required to have the assembly clearance removed by extending the joint prior to the installation of the Flex-Tend and pressurization of the system.Additional Technical Documentation regarding FLEX-TEND and other EBAA Iron products can be found at www.ebaa.com. Refer to the Tech Support page and look under Connection Bulletins FLEX-TEND Flexible Expansion JointFeatures and Applications:Sizes 2 inch through 48 inchRated 350 PSI working water pressure(Sizes 2 inch and 30 inch and above rated at 250 For Ductile Iron, Steel, PVC or HDPE pipeSizes 4 inch through 12 inch have had a con�guration update.Expansion/Contraction travel preset at 50/50 setting. 50% percent reserved for expansion and the remaining 50% reserved for contraction. Designed to give De�ection and or Expansion/Contraction needs to protect pipeline systems from shear. Refer to submittal drawings for “offset” Constructed of ASTM A536 Ductile IronUp to 20° De�ection per ballAdditional Expansion Sleeves can be added for increased expansion capacityEach unit tested to rated working pressure prior to Due to the design of the seals, no periodic maintenance is requiredEnd connections can be Flanged, Mechanical Joint or a combination of the two.Flange outlets conform to the dimensional requirements of ANSI/AWWA C110/A21.10 (class 150) with the addition of an O-ring gasket (except for 2 inch unit) which is provided to ensure a watertight seal. Mechanical Joint end connections conform to the dimensional requirements of either ANSI/AWWA C111/A21.11 or ANSI/AWWA C153/A21.53 FLEX-TEND assemblies are suitable for direct burial. Polyethylene wrap is provided with each unit. If installed in a vault, the design must be such that movement is not impeded. Refer to FT-2 found at www.ebaa.com.All “wetted” parts are coated with a fusion bonded epoxy which is NSF61 Approved.For use on water or wastewater pipelines subject to hydrostatic pressure and tested in accordance with either AWWA C600 or ASTM D2774U.S. Patent No. 4,776,617Image depicts direct burial application (Polyethylene wrap not depicted). Refer to “Connections” FT-2 for more details.Copyright 2017 © EBAA Iron, Inc. All Rights Reserverd.FLEX-TEND, 18 inch Double Ball with Flanged Ends.