Untitled - Future Pipe Industries

More documents

Recommendations

Info

5.0: Joints 5.1: Joint deflection FPI’s Reka Double bell coupling joints, used to join pipes, allows for a certain angular deflection. The maximum allowed angular deflection á, distributed equally on both sides of the joint, and the resulting Offset and the radius of curvature (R) are given with respect to the pipe nominal diameter and section length, in table 9. Nominal Angular deflection at joint Nominal <strong>Pipe</strong> Diameter inch Table 9: Allowable joint deflection Nominal Angular Deflection & (Degree) Nom. Offset (in) Section Lengths Figure 7: Joint deflections, offset and radius of curvature Nominal Radius of Curvature (ft) Section Lengths 10 ft 20ft 40ft 10ft 20ft 40ft 3 to 6 4.0 8.3 16.5 143 286 8 to 12 3.5 7.2 14.4 28.9 162 326 653 14 to 20 3.0 6.2 12.4 24.7 190 383 763 24 to 36 2.0 4.1 8.3 16.5 286 573 1163 40 to 48 1.5 3.1 6.2 12.4 383 763 1526 52 to 72 1.0 2.0 4.1 8.3 573 1146 2289 78 & larger 0.5 1.0 2.0 4.1 1146 2289 4584 19
5.1.1: Joint lubricant For lubricant, use only a vegetable based soft soap, available for purchase from FPI. In dusty conditions lubricate generously the coupling only. The recommended amount of joint lubricant required is shown below. DN (inch) Table 10 Amount of lubricant required per joint (lb) 3 – 12” 0.1 14 – 20” 0.2 24 – 28” 0.25 36 – 40” 0.4 44 – 48” 0.5 52 – 56” 0.6 60 – 64” 0.8 68” – 76” 1.0 80 – 88” 1.2 96” 1.6 104” 2.2 Larger than Consult FPI Caution: Never use petroleum grease, or automotive oils to lubricate the joint, as they may damage the rubber rings. 5.2: Reka Double Bell Coupling assembly Before assembly, inspect each pipe and each coupling carefully and put aside any damaged items. Make sure that all required accessories (timber blocks, rubber rings, lubricant, come-along jacks, collar straps, etc.) are available and that the installation team (jointer) is well instructed about their job. 5.2.1: Preparation of the Reka Double Bell Coupling In order to avoid its damage, the sealing rubber ring must be fitted into the Reka coupling just before the laying starts. Ensure that the grooves of the rubber ring are carefully cleaned with a wire brush and all sand particles are removed. The ring is then fitted according to the procedures, which are shown in figure 8. • For large sizes lay the coupling horizontally for better control and safety. • Fit one end of the ring into the groove. Go on until about three-quarters of the ring is in the groove. Put the other end of the ring towards the starting point. • The formed loop must then be forced into the groove. For large couplings, several loops are necessary to insert the rubber gasket. (The larger the diameter, the more loops are required) • Check that the ring is uniformly and regularly seated into the groove, all the way round. • For large diameter joints, two to five men are necessary to insert the ring depending on the diameter. Figure 8 20
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 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 and 52: APPENDIX III AIR IN PIPELINES, AIR-
Page 53 and 54: APPENDIX IV FLANGE INSTALLATION INS
Page 55 and 56: Table 1a If connected to raised fac
Page 57 and 58: APPENDIX V: LIST OF REFERENCES The

Untitled - Future Pipe Industries

Create successful ePaper yourself

Delete template?

Save as template?