Section F -- Mechanical Data
F-7 Weights and Dimensions of Steel & Wrought Iron Pipe Recommended for Use as Permanent Well Casings
manufacturing weight tolerance is 10 per cent over and 3.5 per Cent under nominal weight for pipe ~20 in. in size and +10 per cent of nominal weight for larger sizes.
based on length of 20 ft. including Coupling. Threaded pipe has 8 threads per inch.
~Thickness indicated is believed to be best practice. If soil and water Conditions are unusually favorable tighter pipe may be used if permitted in the purchaser's specifications.
Note: Welded joints advocated for pipe larger than 20 in. in diameter; also for smaller diameter pipe, where applicable, to obtain clearance and maintain uniform grout thickness.