BlueCollarPipe size basics
NPS is a nominal size; outside diameter stays fixed for a given NPS while wall thickness changes by schedule.
PIPEFITTERS
Pipefitting
Offsets, pipe layout, fitting geometry and dimensional references. Use the tabs below to switch between working calculators and quick field-reference material.
Pipefitting
Pipe Offset
Calculate travel, centerline run, multiplier, and fractional-inch output for 22.5°, 30°, 45°, and 60° fittings.
Open calculator → PipefittingRolling Offset
True offset, travel, and run from rise + roll measurements.
Open calculator → PipefittingPipe Circumference
Circumference, quarter points, half wrap, and equal layout spacing.
Open calculator → PipefittingTwo-45 Set
Center-to-center travel, run, shrink, and optional takeout.
Open calculator → PipefittingPipe Ordinates
Generate equal wrap spacing marks around a pipe for 8, 12, 16, 24, or 32 ordinate layouts.
Open calculator →Field-reference aid. Use approved drawings, current codes/standards, manufacturer data and job-specific procedures for final decisions—especially for lifting, electrical, pressure, fire-protection and life-safety work.
Common offset multipliers
45° = 1.414 • 30° = 2.000 • 22.5° ≈ 2.613 • 60° ≈ 1.155. Travel = offset × multiplier.
Long-radius elbows
A standard long-radius elbow uses a centerline radius of 1.5 × nominal pipe size. Verify fitting dimensions before cutting.
Field check
Use drawing dimensions, actual fitting takeoffs, manufacturer data and project specs as the final authority.
Need a specific table or takeoff chart?
Send us what you use in the field and we can build it into this trade section.
Suggest reference data