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Installation Instructions for Convoluted Molded PTFE Bellows TORQUE TABLE LISTING OPTIONAL PRESSURE RATINGS SIZE TORQUE SIZE TORQUE SIZE TORQUE SIZE TORQUE LIGHT EXTRA LIGHT EXTRA I.D. (IN) (FT/LBS) I.D. (IN) (FT/LBS) I.D. (IN) (FT/LBS) I.D. (IN) (FT/LBS)DUTY HEAVY DUTY DUTY HEAVY DUTY Deg F Deg F 1 15 3 30 10 55 20 85 PRESSURE RATING (psig) PRESSURE RATING (psig) 1.25 15 4 35 12 60 22 90 70� 145 290 250� 62 107 1.5 15 5 40 14 70 24 90 100� 120 217 300� 48 85 2 20 6 44 16 75 -- -- 150� 72 175 350� 44 70 2.5 25 8 50 18 80 -- -- 200� 62 125 400� 38 65 1. Service Conditions: Make sure the expansion joint ratings for tempera-b. Check to make sure PTFE surfaces are clean and free of foreign sedi- ture, vacuum, spring rates and movements match the system requirements.ment. Remove nicks, burrs and deep scratches with a fine emery cloth. If Contact PROCO if the system requirements exceed those of the expansionsurface irregularities cannot be completely removed, install a PTFE enve- joint selected. lope-type gasket to obtain an adequate seal. 2. Alignment: Expansion joints are not designed to make up for pipingc. Install expansion joints to the prescribed neutral lengths. If expan- misalignment error. Pipe misalignment should be no more than 1/8" in anysion joints are used in high temperature processes, it is recommended direction. Misalignment of an expansion joint will reduce the rated move-that units be installed at near extended values. For cold process instal- ments and can cause stress of material properties, thus causing reducedlations, expansion joints should be installed in a nearly compressed service life. length. These settings will enable the expansion joint to realize full travel capabilities. 3. Limit Rod Bolting: Limit bolts are factory set at the maximum allowable d. Thread installation bolts from mating flange side to prevent possible travel position to prevent over extension. Do not remove or alter nuts at damage to PTFE elements. Extend bolts beyond the expansion joint flange any time. Damage or personal injury can result due to changes in limit rod by no more than 1-2 threads. Nuts are not necessary due to threaded nut settings. flange holes. 4. Anchoring: Solid anchoring is required whenever the pipeline changes e. Tighten flange bolts with a torque wrench. Tighten in an alternate direction. Expansion joints should be located as close as possible to these crossing pattern in 20% increments until 80% of final bolt torques have anchor points. If an anchoring system is not used, any associated pressure been achieved. Tighten to final torque values (listed in torque table list- thrust can cause excessive movement, ultimately damaging the expansion ing) in a clockwise fashion around the flange to ensure bolts carry equal joint. (It should be noted that the attached limit rods are designed to stress burdens. limit movement and are not designed to handle pressure thrust.) f. Re-tighten bolts after first cycle of operation. Re-tighten as necessary 5. Pipe Support: Piping must be supported by hangers or anchors so after every planned maintenance shutdown. All bolts should be re-torqued expansion joints do not carry any pipe weight. to the above listed values. 6. Personnel Protection: It is strongly recommended that safety shields 8. Operations: After expansion joints are installed, it may be necessary to be used for all hazardous service to protect against serious personal in- air blast the exterior to remove foreign debris, such as metal chips, from jury in the event of expansion joint failure. (See Back Cover.) between the convolutions. The expansion joint should then be covered 7. Installation: with a shield to protect from damage and foreign debris during operation. a. Store expansion joints withplastic covers in-place to protectPTFE flange(Note: Do not weld in immediate vicinity of expansion joint unless it is surfaces from damage until ready to install. properly protected.) TYPICAL PUMP AND PIPING LAYOUT USING EXPANSION JOINTS WHEN EQUIPMENT AND PIPING ARE PROPERLY ANCHORED. Anchor Expansion Joints Expansion Joint Pump Guide Foundation ENGINEERING DESIGN NOTES: Rx = Tp + (Fx � x) 1. It is essential that piping system thrusts be calculated to ensure cor- rect sizing of anchors and pipe supports, plus ensure that allowable thrust Rx is the pipe support reaction force (lb ), Tp is the pressure thrust (lb ), forces on adjacent mechanical and rotating equipment are not exceeded. f f Fx is the axial spring force of the unit and x is the expected or designed Please use the following formulas: axial movement of the unit (See Tables 1-9). Tp = P � Tf Tp is the pressure thrust (lbf), P is the system operating pressure (Psig)2. It should be noted that axial spring rate values found in Tables 1 and T1 is the thrust factor (or bellows effective area [in2]). The pressurethrough 9 are based on an ambient temperature (70�F) and will decrease thrust, Tp, will act in the axial direction and must be added to the axialas the system temperature rises. In addition, spring rates decrease over spring force (Fx�x) to give the total axial reaction force, Rx. time due to thermoplastic creep if units are operated under pressure.
Goodyear Rubber Products
