Page 8 - Pipeline Rules of Thumb Handbook

Identify the schedule number of pipe by direct 5: Hydrostatic Testing, 133
measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Determine buoyancy of bare steel pipe . . . . . . . . . . . 104 Hydrostatic testing for pipelines . . . . . . . . . . . . . . . . . 134
Determine buoyancy of bare and concrete coated Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . 140
steel pipe in water and mud . . . . . . . . . . . . . . . . . 104
Weights of piping materials . . . . . . . . . . . . . . . . . . . . 105 Volume of water required to fill test section . . . . . . . . 140
Allowable working pressure for carbon steel pipe . . . . 105 Volume required at test pressure . . . . . . . . . . . . . . . . 141
Find the stress in pipe wall due to internal
pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Appendix B . . . . . . . . . . . . . . . . . . . . . . . . . . 142
How to calculate stress in above/below ground
How to use charts for estimating the amount of
transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
pressure change for a change in test water
How to identify the series number of flanged
temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Compressibility factor for water . . . . . . . . . . . . . . . . . 145
Dimensions of three-diameter ells with tangents . . . . 110
Polypipe design data . . . . . . . . . . . . . . . . . . . . . . . . . 111
6: Pipeline Drying, 146
4: Electrical Design, 114 Pipeline Dewatering, Cleaning, and
Drying . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Electrical design . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Hazardous locations . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Dewatering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
NEMA Enclosure Types . . . . . . . . . . . . . . . . . . . . . . 117 Cleaning pipelines . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Size portable electric generators . . . . . . . . . . . . . . . . . 118 Brush pig run with gas . . . . . . . . . . . . . . . . . . . . . . . . 148
Typical wattages for tools and applicances . . . . . . . . . 119 Brush pig run with liquid . . . . . . . . . . . . . . . . . . . . . . 148
Knockout dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 119 Internal sand blasting . . . . . . . . . . . . . . . . . . . . . . . . . 148
National Electrical Code Tables . . . . . . . . . . . . . . . . . 120 Chemical cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Electrical formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Pipeline drying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Full load currents—single phase transformers . . . . . . 124 Moisture content of air . . . . . . . . . . . . . . . . . . . . . . . 151
Full load currents—three phase transformers . . . . . . . 125 Commissioning petrochemical pipelines . . . . . . . . . . . 153
Motor controller sizes . . . . . . . . . . . . . . . . . . . . . . . . 125 Vacuum drying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Voltage drop on circuits using 600V. copper
conductors in steel conduit . . . . . . . . . . . . . . . . . . 126
Determine the most economical size for electric 7: Control Valves, 159
power conductors . . . . . . . . . . . . . . . . . . . . . . . . . 126
How to find the resistance and weight of copper Control valve sizing formulas . . . . . . . . . . . . . . . . . . . 160
wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Sizing control valves for thruput . . . . . . . . . . . . . . . . . 164
What you should remember about electrical Control valve selection . . . . . . . . . . . . . . . . . . . . . . . . 169
formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Relief Valve Sizing, Selection,
How to calculate microwave hops on level ground . . . 127
For quick determination of the horsepower per Installation and Testing . . . . . . . . . . . . . 171
ampere for induction motors (3 phase) at different Rupture disc sizing . . . . . . . . . . . . . . . . . . . . . . . . . . 175
voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 Rupture disc sizing using the resistance to flow
Chart gives electric motor horsepower for pumping method (K R ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 Variable orifice rotary control valves . . . . . . . . . . . . . . 178
Pumping stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Sizing Valves for Gas and Vapor . . . . . . . . 180
Floodlighting Concepts . . . . . . . . . . . . . . . . 130
Basic valve flow-capacity coefficient (C v ) . . . . . . . . . . 180
Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Floodlighting calculations . . . . . . . . . . . . . . . . . . . . . . 130
Point-by-point method . . . . . . . . . . . . . . . . . . . . . . . . 130 8: Corrosion/Coatings, 185
Beam-lumen method . . . . . . . . . . . . . . . . . . . . . . . . . 131
Design procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Hand-held computer determines concrete coating
Conductor size coversion chart—Metric to AWG . . . . 132 thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

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