FieldEngineersKitMechanical
Rotating equipment, torque, and mechanical clearance calculators.
Valve Cv Sizing Calculator
Free valve sizing calculator — ISA/IEC US Cv for liquid & gas, Q/P1/P2, catalog Cv,sel headroom. Default liquid Cv≈80.1; docs duty Cv≈87.7.
Bolt Torque & Tensioning
ASME PCC-1 flange bolt torque & tension calculation — B16.5 studs, moly T_table (K=0.13), K/grade scaling, Round 1–4. NPS 6 Cl 300 → 366 N·m.
Flange Bolt Tightening Sequence
Free flange bolt torque pattern & tightening sequence generator — 12- and 20-bolt star diagrams, PCC-1 passes, even counts 4–64.
Blind Flange Thickness
Calculate ASME B31.3 / VIII-1 UG-34 flat blind thickness t = d × √(0.3P / SE) + c from diameter, design pressure, and corrosion allowance.
Pump NPSH & Cavitation
Mechanical pump NPSHa / cavitation margin calculator. Screen available NPSH vs OEM NPSHr for water, seawater, condensate, and light hydrocarbons (HI 9.6.1 · ASME B73.1 · API 610).
Total Dynamic Head (TDH) & Pump Power
Pump TDH and brake horsepower calculator. Screen Hs + Hf + Hp, BHP = Q·TDH·SG/(3960·η), and IEC/NEMA motor rating recommendations (HI 14.3 screening).
Pump Affinity Laws & Impeller Trimming
Pump affinity laws and impeller trim calculator. Predict Q₂, H₂, P₂ from speed (VFD) or diameter cut with D₂/D₁ trimming limit warnings for TA / shutdown reviews.
Pump Minimum Continuous Stable Flow (MCSF) & Thermal Protection
API 610 / HI 9.6.1 pump MCSF calculator. Compare thermal and hydrodynamic minimum continuous flow, estimate shut-off power, ΔT, ARC valve Cv, and bypass NPS.
Multiple Pump Parallel & Series Operation
HI 14.3 parallel and series pump calculator. Intersect quadratic pump and system curves for Q_op, H_op, flow/head gain, and runout warnings.
Flange Bolt & Wrench Size Quick Lookup
ASME B16.5 / B18.2.2 heavy-hex wrench AF, stud diameter, bolt count, BCD pitch, and stud length quick lookup for field spanner / socket selection.
Tank & Pressure Vessel Volume Calculator
ASME VIII Div 1 head volumes and API 650 / ISO 7507 tank level–capacity screening for horizontal and vertical vessels — partial liquid volume, fill %, ullage, and dipstick calibration.
Heat Exchanger LMTD & Duty Calculator
TEMA LMTD, F-factor correction, heat duty, and required area with IAPWS-IF97 water/steam properties for shell-and-tube screening.
Compressor Gas Power & Polytropic Screening Calculator
GPSA polytropic head, gas power, and discharge temperature for centrifugal/axial compressor screening per API 617 and ASME PTC 10.
API 650 Tank Shell Thickness Calculator (1-Foot Method)
API 650 Section 5.6.3 1-foot method shell course thickness, Table 5.2a/5.2b minimums, commercial plate selection, and shell MTO screening.
Pressure Vessel Head Thickness (ASME VIII-1 UG-32)
ASME Section VIII Div.1 UG-32 formed head thickness — 2:1 ellipsoidal, torispherical, hemispherical, and conical t_req / t_nom with II-D allowable stress S(T).
Pressure Vessel Nozzle Reinforcement Pad (ASME VIII-1 UG-37)
ASME Section VIII Div.1 UG-37 / UG-40 nozzle opening area replacement — required A vs available A1–A42, repad thickness screen with II-D allowable stress S(T).
Rolling Element Bearing Life L10h Calculator (ISO 281 / ABMA 9)
ISO 281 / ABMA 9 & 11 bearing L10h rating life calculator — equivalent dynamic load P = X·Fr + Y·Fa, L10 = (C/P)^p, L10h hours at 90% reliability for ball and roller bearings.
Lifting Lug & Rigging Capacity Calculator (ASME BTH-1 / AISC)
ASME BTH-1 Category B / AISC lifting lug capacity screen — sling P_t and P_s, pin-hole bearing, tear-out shear, and base fillet weld unity for pad-eye design.
Steam Turbine Power Output & Specific Steam Consumption Calculator (ASME PTC 6 / IAPWS-IF97)
ASME PTC 6 / IAPWS-IF97 steam turbine power and SSC screen — isentropic enthalpy drop, shaft and electrical MW, specific steam consumption, and condensate heat-rate estimate.
Shaft Power, Torque & Parallel Key Sizing Calculator (DIN 6885 / ASME B17.1)
DIN 6885-1 / ASME B17.1 shaft torque and parallel-key shear/bearing screen — transmitted torque, key length L_min, and unity ratios for pure torsion duty.
Storage Tank Venting Rate Calculator (API 2000 7th Ed)
API Std 2000 7th Ed normal inbreathing/outbreathing and fire-exposure emergency vent capacity for atmospheric and low-pressure metal storage tanks — PVRV screening.