Get the pipe right the first time.

31 Pipe Hydraulics calculators

Every calculator in this category, by its reference code. Running them needs a Tenselo subscription — subscriptions open soon.

• HYD-001 Pipe Insulation Heat Loss

  Heat loss & surface temperature of an insulated (and bare) horizontal pipe

• HYD-002 Siphon Priming / Break-Vacuum

  Crown vacuum, cavitation/air-break check and priming volume for a siphon pipeline

• HYD-003 Flange Finder

  AS 4087 / AS 2129 / ANSI / ISO drilling: OD, PCD, bolts, holes

• HYD-004 HDPE Butt Weld Fusion (Tender)

  Fusion pressures + times and a joint-count / crew / days estimate

• HYD-005 Pipe DN from Friction

  Smallest DN whose total HW loss <= your budget

• HYD-006 Pipe PN Selector

  Smallest pressure class covering operating + surge

• HYD-007 Pipe Selector (AU)

  Fluid + flow + velocity -> recommended pipe (viscosity-aware Darcy-Weisbach)

• HYD-008 Pipe Size Recommendation

  Smallest standard DN that meets your target velocity

• HYD-009 Pipe Volume & Fill Time

  Water held in a pipe run and the time to fill or drain it at a flow

• HYD-011 Trench Excavation Volume

  Dig, bedding and spoil volumes for a pipe trench (with batter)

• HYD-012 Flow & Velocity

  Pipe area, velocity, flow conversions

• HYD-013 Friction (Darcy-Weisbach)

  Alternative to Hazen-Williams for non-water or high-precision

• HYD-014 Friction Loss

  Pipe head loss + fittings allowance

• HYD-015 Gravity Flow

  Gravity flow for an AU pipe (check OR size for a flow) + vacuum-collapse + air valves

• HYD-016 Manifold Head Loss

  Even-spaced outlets along a header

• HYD-017 Minor Losses (K factors)

  Fitting head loss h_L = K * v^2 / 2g

• HYD-018 Reynolds Number

  Laminar vs turbulent

• HYD-019 Velocity Head

  H_v = v^2 / 2g

• HYD-020 Manning Open Channel

  Flow in an open channel

• HYD-021 Orifice Discharge

  Flow through a sharp-edged orifice from its diameter + head

• HYD-022 Slide Gate Flow Estimator

  Flow under a sluice / slide gate lifted off the bottom (L/s + ML/day)

• HYD-023 Tank Drain Time (Orifice)

  Time to gravity-drain a tank through an outlet orifice

• HYD-024 Weir Flow Estimator

  Channel / spillway flow over a rectangular weir (L/s + ML/day)

• HYD-025 Bracket / Support Spacing

  Max support spacing AND the load each support carries, for an above-ground pipe full of water

• HYD-026 Thermal Expansion

  Pipe growth/shrink, expansion-loop leg and anchor force vs temperature

• HYD-027 Thrust Block Size Calculator

  Bend/tee/cap thrust -> bearing area, block size & concrete volume

• HYD-028 Water Hammer / Surge Anticipation

  Surge on valve closure + static head -> total at the valve

• HYD-029 Water Meter Sizing

  Size the meter + straight pipe lengths by flow & pipe size; pick a brand/output

• HYD-030 Water Supply & Fire-Flow Demand

  Peak day/hour demand + fire flow & storage, governing main size (WSA 03 / AS 2419.1)

• HYD-031 Screen Flow Selector

  Flow through intake & process screens: open area, screen area, velocity checks and head loss for wedge-wire, sidehill, suction, drum and well screens

• HYD-032 Anti-Vortex Plate Design

  Size an anti-vortex plate for a foot valve / pump in shallow water, or a tank outlet to recover dead storage