Offline Pipe Trades Reference and Calculator

Schedule 40 defines a wall thickness for each nominal size — for example, 2-inch nominal Sch 40 carbon steel has a 2.375 in outside diameter, 0.154 in wall, and roughly 2.067 in inside diameter at about 3.65 lb/ft. PipeDeck's reference deck lists OD, wall, ID and weight for the common schedules and sizes, searchable offline.

Both share the same outside diameter for a given nominal size, but Schedule 80 has a thicker wall, so its inside diameter is smaller and it handles higher pressure. That also changes weight per foot and flow capacity. PipeDeck shows both schedules side by side so the trade-off is visible at a glance.

They are wall-thickness grades of copper tube: Type K is the thickest, L is medium, and M is the thinnest, with usage conventions varying by application and local code. All three share outside diameters for a given size. PipeDeck's copper tables list the dimensions for each type so you can look up the exact wall and ID.

A rolling offset combines a horizontal and a vertical offset into one diagonal run; you square both offsets, add them, and take the square root to get the true offset, then apply the fitting angle's constant to find the travel. PipeDeck computes travel, run and set for rolling offsets at standard fitting angles from the numbers you enter.

The common approach is the longest-length method: size every section for the total developed length to the farthest appliance, using capacity tables for the fuel, pressure and pressure drop. PipeDeck runs longest-length and branch-method sizing on device. Results are a reference aid — always verify against the governing code, such as NFPA 54 or IFGC, and your local authority before installation.

PipeDeck is fully offline by design. The reference dataset ships inside the app and the calculators run locally, so nothing needs a connection or a login — it keeps working in a no-signal mechanical room or a remote site.

The pitfall is rounding to a decimal inch and then to the nearest fraction, which compounds error. PipeDeck's unit engine converts feet-inch-fraction and metric through one exact representation, so a value round-trips without drift — and the engine is covered by unit tests.

Takeoff (or fitting allowance) is the length a fitting adds to a run — the distance from the fitting's center to the end of the pipe thread or weld point — which you subtract when cutting pipe to make the assembly come out to the right length. PipeDeck includes thread and fitting takeoff dimensions in the reference deck.

Support spacing depends on the pipe material and size — heavier or more rigid pipe can span farther between hangers than flexible tubing. PipeDeck's reference tables list common hanger and support spacing by material and size, to be confirmed against the code that governs your job.

Not for smaller steel pipe — a 2-inch nominal pipe actually measures 2.375 in OD; nominal size is a naming convention, and the true OD comes from the standard. Copper tube uses a different convention again. PipeDeck's tables give the real OD and ID for each nominal size so there is no guessing.

Yes — for a 45 degree offset the travel equals the offset multiplied by 1.414, and PipeDeck does this and the less memorable angles like 22.5 degrees for you. Enter the offset and it returns travel and run, in feet-inch-fraction or metric.

Yes. Recent lookups and calculations are saved locally on your iPhone as jobs, so you can reopen the numbers from a previous visit. There is no account and no cloud — the data stays on the device.