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General-purpose tools are free and run locally in your browser. Pro calculation tools include a demo preset; unlock full features per product in Digital assets.
Pro demo: alumina digestion casing U/HTC; phase-change/no-phase modes, scaling fouling, UTC split-flow; browser-local.
Pro demo: eight-section U/HTC for falling-film evaporators; IAPWS-IF97 shell steam, film hf, alumina preset; browser-local.
Free online IAPWS-IF97: saturation, superheat, subcooled water; thermodynamic and transport properties.
Free online: high-precision engineering unit conversion with legacy heat-transfer and SI categories.
Free online: multi-fluid thermodynamic & transport properties via CoolProp (HEOS + incompressible); single-point free, batch Excel uses platform credits.
Free online: GB 50316 §6.6.1, GB/T 150.3 Table 7-9 items 1–8 plus custom K, ASME UG-34 flat cover thickness—not blind plates between flanges (§6.7.2).
Free online: GB/T 12459 & ASME B16.9 butt-weld fitting mass; wide DN/NPS; carbon/stainless schedules or custom OD/wall.
Free online: GB 50316-2000 (2008) §6.7.2 blind plate between flanges or ASME VIII UG-34. Not flat covers (§6.6.1).
Free online: Obana (1982) Ch.9 fouling extrapolation and flow/diameter correction; exponential model.
Free online: Crane TP-410 style K factors for valves and fittings; L/D tables scaled to pipe ID.
Free online: mass from OD, wall thickness, length and density; browser-local spot checks.
Free online: GB/T 17395 OD, GB/T 20801.1 appendix B allowable stress; metal/non-metal straight-pipe wall thickness & Sch screening (GB/ASME).
Free online: volumetric flow, target velocity, pipe inner diameter and wall thickness; design/test modes.
Free online: barometric pressure and air density from elevation, ASHRAE moist-air psychrometrics, and CIPM-2007 standard dry-air composition; browser-local.
Free online: CN · DTII(A)/GB/T 10595, ISO 5048 and CEMA 5th ed. — cross-section geometry (α, λ), preliminary belt width, power, tension and standard parts; browser-local.
Free online: pump head, NPSHa, max installation height and cavitation margin; Bernoulli screening.
Free online: handbook-style volume and surface area for cylinders, cones, spheres, caps, and ellipsoids.
Free online: GB/T 9125, EN, or ASME axial stack for bolt/stud nominal length; flange, gasket, nut and washer inputs.
Free online: valve Kv from flow rate, pressure drop and specific gravity; turbulent screening.
Free online ASME B31.3 area reinforcement for set-on branches; design pressure, OD and wall thickness; oblique angle and multi-opening screening.
Free online: solid/liquid/gas combustion, flue gas and temperature; Mei Chi 1979 handbook or general balance; browser-local.
Free online: Darcy–Weisbach straight-pipe loss, Churchill f, Reynolds, ΣK minor losses and elevation term.
Free online: bank volume and loose placement with user bulking factor k; L×W×H prism screening.
Free online: material mass from volume and homogeneous density; browser-local.
