ASME B36.19-2022 pdf download

ASME B36.19-2022 pdf download.Welded and Seamless Wrought Stainless Steel Pipe.
1 SCOPE This Standard covers the standardization of dimensions of welded and seamless wrought stainless steel pipe for high or low temperatures and pressures. The word “pipe” is used, as distinguished from “tube,” to apply to tubular products of dimensions commonly used for pipeline and piping systems. (22) 2 SIZE The size of all pipe in Table 2-1 is identifed by the dimensionless designator nominal pipe size (NPS) [diametre nominal (ON)]. Pipes NPS 12 (ON 300) and smaller have outside diameters numerically larger than their corresponding sizes. In contrast, the outside diameters of tubes are numerically identical to the size number for all sizes. The manufacture of pipe NPS % (ON 6) to NPS 12 (ON 300), inclusive, is based on a standardized outside diameter (0.0.). This 0.0. was originally selected so that pipe with a standard 0.0. and having a wall thickness that was typical of the period would have an inside diameter (1.0.) approximately equal to the nominal size. Although there is no such relation between the existing standard thicknesses – 0.0. and nominal size – these nominal sizes and standard 0.0.s continue in use as “standard.” The manufacture of pipe NPS 14 (ON 350) and larger is based on the 0.0. being the same as the nominal pipe size. 3 MATERIALS The dimensional standards for pipe described here are for products covered in ASTM specifications. 4 WALL THICKNESS The nominal wall thicknesses are given in Table 2-1. The wall thicknesses for NPS 14 (ON 350) to NPS 22 (ON 550), inclusive, of Schedule lOS; NPS 12 (ON 300) of Schedule 40S; and NPS 10 (ON 250) and NPS 12 (ON 300) of Sched­ ule SOS are not the same as those of ASME 836.10. The sufix “S” in the schedule number is used to diferentiate 836.19 pipe from 836.10 pipe. ASME 836.10 includes other pipe thicknesses that are also commercially avail­ able with stainless steel material.
5 WEIGHTS/MASSES The nominal weights (masses) 1 of steel pipe are calcu­ lated values and are tabulated in Table 2-1. (a) The nominal plain end weight, in pounds per foot, is calculated using the following equation: Wpe = 10.69(D – t)t where D outside diameter to the nearest 0.001 in. for NPS 8 and smaller, and to the nearest 0.01 in. for NPS 10 and larger (the symbol D is used for 0.0. only in mathematical equations or formulas) t = specified wall thickness, rounded to the nearest 0.001 in. Wpe = nominal plain end weight, rounded to the nearest 0.01 lb/ft (b} The nominal plain end mass, in kilograms per meter, is calculated using the following equation: Mpe = 0.024661S(D – t)t where D = outside diameter to the nearest 0.01 mm for ON 200 and smaller, and to the nearest 0.1 mm for ON 250 and larger (the symbol D is used for 0.0. only in mathematical equations or formulas) Mpe = nominal plain end mass, rounded to the nearest 0.01 kg/m t = specified wall thickness, rounded to the nearest 0.01 mm 6 PERMISSIBLE VARIATIONS Variations in dimensions differ depending upon the method of manufcture employed in making the pipe to the various specifications available. Permissible varia­ tions for dimensions are indicated in each specification. 7 PIPE THREADS Unless otherwise specified, the threads of threaded pipe shall conform to ASME 81.20.1. Schedules SS and lOS wall thicknesses do not permit threading in accordance with ASME 81.20.1.