Untitled - Future Pipe Industries

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6- Using motorized actuated valves is an effective means of limiting positive surges to an acceptable level by controlling the rate of opening and closing of the valves. 7- Flywheels on pump motors allow the pump to keep on running for a short period of time after any power shut down, before it gradually stops. Note: For water hammer calculations, a value of 17,500 MPa (2,538,000 psi) may be used for the pipe. Modulus of Elasticity E’ for continuous filament wound pipe. Surge Control Device 49
APPENDIX IV FLANGE INSTALLATION INSTRUCTIONS 1. Scope Installation instructions and use of fiberglass ( RTR ) flanges. Tools Tools necessary for assembly of Flanges are: • Ring spanner with required bolt-head size • Torque wrench with required socket size. Note: Fiberglass flanges are substantially thicker than steel flanges. The contractor should contact FPI for actual thickness of flanges supplied to order the correct flange bolt lengths. Bolts and Nuts Bolts should be wire brushed and lubricated before being used. Failure to clean the bolts will result in insufficient initial tension in the flange bolts which could result in movement of the flange during operation conditions. Washers and nuts should be clean and well lubricated before being used. It is important to use washers with all fiberglass flanges. ALWAYS USE A TORQUE WRENCH. CAUTION: Fiberglass flanges must always be installed tension free, therefore flanges must be accurately aligned. <strong>Pipe</strong>lines must never be pulled by means of the flange bolts. If a fiberglass pipeline is connected to a steel line, this steel line must be anchored at or near the interface point to prevent any movements or loads being transmitted to the fiberglass line. 2. Connection against raised Face Flange: Fiberglass flanges are flat faced and must be connected against flat faced flanges. If this is not possible, special precautions should be taken. • The gap between the raise face and the flat face must be filled with a stainless steel washer or a hard gasket (e.g. Asbestosfree CAF-equivalent type) of a thickness equal to: the raised face ‘t’ + gasket ‘t’ – ⁄”. • A second alternative is to fit a steel back up ring behind the fiberglass flanges. Through 12” diameter the connection of fiberglass flat faced flanges is possible provided that the torques is limited. On the fiberglass side of the flange joint the bolts and nuts must be provided with washers to avoid exceeding the allowable surface pressure. • When assembling a wafer-type butterfly valve, the bolts should be tightened first by hand. At pressure testing if leakage occurs, the bolts can be tightened up to the maximum valves. To avoid over stressing of the flanges, spacers can be placed between the GRP flanges. 3. Tightening sequence of fiberglass flanges • Tightening of the bolts of a flange connection must be done according to the diagonal sequence shown below. • Bolts in the flanges must be placed straddle to the centerline unless differently specified. • The flange must be connected perpendicular on the axis of the pipe. The maximum allowable deviation is as follows: For pipe diameter through 12” : 1 mm (0.04”) For pipe diameter 14” through 24” : 2 mm (0.08”) For pipe diameter 28” mm and larger : 3 mm ( 1/8”) 50
Page 2 and 3: All information was correct at the
Page 4 and 5: 1.0: Introduction This manual deals
Page 6 and 7: 2.5: Storing pipes on site 2.5.1 Di
Page 9 and 10: Figure 4: Pipes in the same trench
Page 11 and 12: 4.0: Backfilling and installation s
Page 13: 4.5: Classification of native soils
Page 16 and 17: Installation type I ASTM D1586 Blow
Page 18 and 19: Installation type I ASTM D1586 Blow
Page 20: Installation type I ASTM D1586 Blow
Page 23 and 24: 5.1.1: Joint lubricant For lubrican
Page 25: Mechanical lowering is used for lar
Page 28: 5.6: Pipes with locked joints For s
Page 31 and 32: Caution: Always provide a standard
Page 34 and 35: Figure 20 6.2: Pipe zone backfillin
Page 36 and 37: 6.3: Backfilling where temporary sh
Page 38 and 39: 7.0: Hydrostatic testing of pipelin
Page 40 and 41: 7.2: Bracing test-ends and set-up D
Page 42 and 43: 7.6: Final pressure test After all
Page 44 and 45: 7.9.2: Low head water test The Cont
Page 46 and 47: 9.0: Tapping water mains Pressure p
Page 48 and 49: APPENDIX II: Design considerations
Page 51: APPENDIX III AIR IN PIPELINES, AIR-
Page 55 and 56: Table 1a If connected to raised fac
Page 57 and 58: APPENDIX V: LIST OF REFERENCES The

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