Calculators for piping, welding, sheet metal and machining
The 54 calculation tools of Metalary, grouped by trade. Each page shows a worked example with the tool’s default values and cites its sources; results are indicative.
Piping
18 tools
Isometric planLine entered item by item: dimensioned isometric, 3D, spool cut list, bill of materials, welds, PDF.Pipe offsetOffset a line with two elbows: cut length, angle from the spool or the run, elbow cut layout.Rolling offsetOffset both up and sideways with two elbows: true offset, cut length, elbow roll.Parallel pipe offsetSeveral parallel lines through the same offset: start shift of each line, cut length.Branch on pipeSaddle cut for a square, angled or offset branch: generator lengths and full-size wrap-around template.Branch on elbowSaddle cut for a branch at the middle of an elbow (outer side or flank): generators and full-size template.Mitre bendSegmented elbow: cut angle, outside / centreline / inside length of each piece, cutting template.Cut-down elbowCut a 90° or 45° elbow down to any angle: lengths at the back, side and belly, marks and cutting template.Tee + elbowTake-out of an elbow fitted on an equal tee, direct or with a spool; spool to cut for a given dimension.Swept teeBranch made from an elbow laid on the header: elbow cut, height-gauge marks, full-size header hole.ReducerConcentric or eccentric reducer: angle, taper and flat pattern to mark out on plate.Pipe bendingCut length, bend marks from the end, gain and approximate wall thinning.Standard fittingsTake-out of buttweld elbows, tees, reducers and caps (ASME B16.9, EN 10253-2).Flanges and boltingDrilling, bolts, studs and wrench size of an EN 1092-1 (PN) or ASME B16.5 (class) flange.Flange gasketDimensions of EN 1514-1 and ASME B16.21 flat gaskets and ASME B16.20 spiral wound gaskets (rings included).Jacketed pipePipe in a pipe: gap, spacers (height, count, positions), volumes, weight and gap in the elbows.Line weightWeight of a pipe run per metre and in total: pipe, water, insulation.Hydrostatic testIndicative test pressure (PED / EN 13480-5 or ASME B31.3) and gauge range.
Welding
11 tools
Heat inputHeat input in kJ/mm (EN 1011-1) from current, voltage and travel speed.Carbon equivalent and preheatCE (IIW), CET and indicative preheat temperature (EN 1011-2, method B) with validity range check.Shielding gasRecommended gas (ISO 14175 class) and flow in L/min by process, material and wire diameter.Back purgeVolume to purge between dams, pre-purge time and gas use to shield the root side.Welding settingsCurrent, voltage, wire or electrode, gas and polarity by process, material, thickness and position; dimensioned joint preparation and passes.Weld shrinkageIndicative transverse and longitudinal shrinkage of a butt joint, with pre-setting advice.Filler metal weightJoint section (V, X, fillet), deposited weight and filler weight to order by process.Weld defect diagnosisTick what you see at the arc, in the pool and on the bead: ranked likely causes and remedies (TWI).ISO 5817 criteriaPermitted limit of an imperfection by quality level B, C or D, and verdict on the measurement (ISO 5817:2023).Weld pass layoutGroove area, number of layers and passes, numbered welding sequence sketch.Dissimilar metal weldingFiller metal to join two different metals (steel, stainless, duplex, nickel, aluminium) and precautions.
Sheet metal
11 tools
Cone and frustumPattern of a right cone or frustum: radii, sector angle, chord, sagitta, full-size template.Shell courseBlank length of a rolled cylinder on the neutral fibre, mass and pre-bend guide.Bend developmentFlat length of a bent plate (up to 4 bends) using a K-factor, bend deduction and bend-line positions.Plate and section weightMass of plate, flat bar, round bar, tube, angle or IPE / HEA / HEB / UPN: kg/m and total.Drilling and tappingISO tap drill for a thread, starting spindle speed and feed for the drill and the tap.Right triangleTwo known values (sides or angle): all sides, angles, slope and area.Mitre cutCut angle of two sections (equal or different widths) joining at a given angle.Square-to-round transitionRectangle to round, centred or offset: triangulated pattern (true lengths of the element lines) and a full-size template.Hopper (pyramid frustum)Rectangle to rectangle: pattern of the four faces (trapezoids), true edge lengths, bend angles, area and mass.Plate end pre-bendingFlat left by the plate roll, seam peaking, length to pre-bend, press hits, radius under load and checking template.Frame planCut lengths of a rectangular frame (mitred or butt), squareness diagonal and cut list.
Workshop
4 tools
Unit converterLength, pressure, gas flow, temperature, mass and torque: one value, every unit.Bar cutting planHow many bars for a list of parts: cutting plan per bar, saw kerf, offcuts and waste rate.Level and slopePhone angle on the part → slope in %, mm/m, 1:N and rise; or a wanted slope → angle to set.Material designationDecodes S355J2+N, P265GH, 1.4404, A312 TP316L, EN AW-6060 T6…: meaning of each part, family, standard, equivalents.
Machining
10 tools
Cutting speed and feedN, Vf, power and removal rate for turning, milling and drilling, with catalogue starting values.ISO 286 fitsHole and shaft limits, clearance or interference, any class a to zc up to 500 mm.Threads and tap drillsTap drill for cutting or forming taps, pitch and minor Ø, depth: M, UNC/UNF, G, Rp, Rc, NPT.Tightening torquesTorque and preload of a metric bolt by class and friction (VDI 2230), minimum preload by method.Bolt circleX/Y coordinates of n holes on a circle or arc, hole spacing, full-size marking template and DXF.TapersTaper ratio, angle, compound setting and tailstock offset; Morse, metric and chuck tapers.Measuring over pinsThree-wire measurement and best wire; over-pin measurement of a male or female dovetail.Hardness conversionHRC, HB, HV, HRB and tensile strength of steels, from ISO 18265.Turning surface finishTheoretical Ra and Rz from feed and nose radius, max feed for a target Ra, N classes.Machining timeCutting time for turning, facing at constant Vc, drilling and milling, per part and per batch.