3.1.1 bblh_galh -
to 
3.1.2 galh_bblh -
to 
3.1.3 bblh_m3h -
to 
3.1.4 m3h_bblh -
to 
3.1.5 galh_m3h -
to 
3.1.6 m3h_galh -
to 
3.1.7 psi_kpa -
to 
3.1.8 kpa_psi -
to 
3.1.9 psimi_kpakm -
to 
3.1.10 kpakm_psimi -
to 
3.1.11 lbh_kgh -
to 
3.1.12 kgh_lbh -
to 
3.1.13 ft3lb_m3kg -
to 
3.1.14 m3kg_ft3lb -
to 
3.2 Darcy friction factor calculation
3.2.1 colebrook_white - Colebrook-White equation
3.2.2 haaland - Haaland friction factor
3.2.3 swamee_jain - Swamee-Jain friction factor
3.2.4 serghides - Serghides friction factor
3.2.5 goudar_sonnad1 - Goudar-Sonnad (2006) friction factor
3.2.6 goudar_sonnad2 - Goudar-Sonnad (2011) friction factor
3.2.7 brkic - Brkic friction factor
3.2.8 brkic_praks - Brkic-Praks friction factor
3.2.9 praks_brkic - Praks-Brkic friction factor
3.2.10 niazkar - Niazkar friction factor
3.2.11 moody - Moody friction factor
3.2.12 wood - Wood friction factor
3.2.13 eck - Eck friction factor
3.2.14 churchill1 - Churchill (1973) friction factor
3.2.15 churchill2 - Churchill (1977) friction factor
3.2.16 jain - Jain friction factor
3.2.17 chen - Chen friction factor
3.2.18 round_friction - Round friction factor
3.2.19 barr - Barr friction factor
3.2.20 zigrang_sylvester1 - Zigrang-Sylvester friction factor
3.2.21 zigrang_sylvester2 - Zigrang-Sylvester friction factor
3.2.22 tsal - Tsal friction factor
3.2.23 manadilli - Manadilli friction factor
3.2.24 romeo_royo_monzon - Romeo-Royo-Monzon friction factor
3.2.25 vatankhah_kouchakzadeh - Vatankhah-Kouchakzadeh friction factor
3.2.26 buzzelli - Buzzelli friction factor
3.2.27 cheng - Cheng friction factor
3.2.28 avci_kargoz - Avci-Kargoz friction factor
3.2.29 evangelides - Evangelides-Papaevangelou-Tzimopoulos friction factor
3.2.30 fang - Fang friction factor
3.2.31 alashkar - Alashkar friction factor
3.2.32 bellos - Bellos-Nalbantis-Tsakiris friction factor
3.2.33 tkachenko1 - Tkachenko-Mileikovskyi friction factor
3.2.34 tkachenko2 - Tkachenko-Mileikovskyi friction factor
3.2.35 blasius - Blasius friction factor
3.2.36 koo - Koo friction factor
3.2.37 nikuradse_reichert - Nikuradse-Reichert friction factor
3.3 Helical Pipes
3.3.1 dean_number - Dean number
3.3.2 germano_number - Germano number
3.3.3 helical_white - White helical friction factor
3.3.4 helical_hart - Hart helical friction factor
3.3.5 helical_gnielinski - Gnielinski helical friction factor
3.3.6 helical_mishra_gupta - Mishra-Gupta friction factor
3.3.7 helical_mori_nakayama - Mori-Nakayama friction factor
3.3.8 helical_srinivasan - Srinivasan friction factor
3.4 Compressebility
3.4.1 hall_yarborough - Hall-Yarborough equation of state
3.4.2 dranchuck_purvis_robinson - Dranchuk-Purvis-Robinson equation of state
3.4.3 dranchuck_abou_kassem - Dranchuk & Abou-Kassem equation of state
3.4.4 beggs_brill - Beggs-Brill equation of state
3.4.5 papay - Papay correlation
3.4.6 cnga - United States Natural Gas Association of California (CNGA) formula
3.5 Pressure Drop
3.5.1 hazen_williams_p - Hazen-Williams pressure drop
3.5.2 hazen_williams_q - Hazen-Williams flow rate
3.5.3 hazen_williams_c - Hazen-Williams roughness factor
3.5.4 darcy_weisbach_p - Darcy-Weisbach pressure drop for
3.5.5 darcy_weisbach_q - Darcy-Weisbach volume flow
3.6 Oil Pipe Pressure Drop
3.6.1 aude_p - Aude pressure drop for
3.6.2 aude_q - Aude volume flow
3.6.3 shellmit_p - Shell-MIT pressure drop for
3.6.4 shellmit_q - Shell-MIT volume flow
3.6.5 miller_p - Miller pressure drop for
3.6.6 miller_q - Miller volume flow
3.7 Steam Pipe Pressure Drop
3.7.1 unwin_p - Unwin Formula
3.7.2 unwin_w - Unwin Formula
3.7.3 babcock_p - Babcock Formula
3.7.4 babcock_w - Babcock Formula
3.7.5 fritzche_p - Fritzche Formula
3.7.6 fritzche_w - Fritzche Formula
3.8 Compressible Flow
3.8.1 panhandle_a_q - Panhandle A for flow
3.8.2 panhandle_b_q - Panhandle B for flow
3.8.3 weymouth_q - Weymouth for flow
3.8.4 spitzglass_q - Spitzglass for flow
3.8.5 oliphant_q - Oliphant for flow
3.8.6 igt_q - IGT for flow
3.8.7 muller_q - Muller for flow
3.8.8 fritzsche_q - Fritzsche for flow
3.9 Miscellaneous
3.9.1 average_pressure - Average pressure
3.9.2 reynolds_number - Reynolds Number
