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G-Series pipe thread chart (British standard pipe parallel was BSPP & BSPF) and PF-Series pipe thread chart (Japanese pipe parallel).
BSPP G 1/4 : Brith Pipe (BSP) Thread Dimensions and Tolerances. All the relevant data for this tread in one spot.
Gauge Length: Because of the taper angle, the diameters (major, minor, and pitch) change as we move along the thread’s axis. The gauge length is an arbitrary distance from the thread’s end at which the measurements of diameters are made.
The BSPT thread chart calculator shows sizes, dimensions, tolerances and designation for jointing pipe threads for thread sizes from 1/16 to 6 according to ISO 7-1 standard. The thread form follows the British Standard Whitworth thread.
PIPE & FITTINGS DATA CHARTS 2 American Standard Steel Pipe ASME B36.10 AMERICAN STANDARD STEEL PIPE ASME B36.10 Nominal Size Outside Diameter Nominal Wall Thickness & Weight for Welded & Seamless Steel Pipe ASME B36.10 KEY: Dimensions - mm (Black) Weight - kg/m (Green) DN NPS mm STD EXTRA STRONG XX STRONG SCHED. 10 SCHED. 20 SCHED. 30
Thread Pitch Gauge: Used to measure the number of threads per inch, as well as thread to thread spacing in the case of metric connections. Before you begin measuring, be sure the threads are in good condition. Distorted or worn out threads can give you inaccurate measurements.
The seat gauge is used to determine end connection seat angles of 45°, 37°, and 30°. The pitch gauge is used to identify the thread pitch. Note that a pitch gauge may be Unified (threads per inch), Whitworth (threads per inch), or metric (millimeters per thread) as marked on the back of each gauge form.
