ASME B36.19 pdf download

ASME B36.19 pdf download Welded and Seamless Wrought Stainless Steel Pipe
1 SCOPE
This Standardcovers thestandardizationofdimensions of welded and seamless wrought stainless steel pipe for high or low temperatures and pressures. The word“pipe” is used, as distinguishedfrom“tube,” to apply to tubular products of dimensions commonly used for pipeline and piping systems.
2 SIZE ð22Þ
The size of all pipe in Table 2-1 is identified by the dimensionless designator nominal pipe size (NPS) [diamètre nominal (DN)]. Pipes NPS 12 (DN 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 ofpipe NPS 1 ∕ 8 (DN 6) to NPS 12 (DN 300), inclusive, is based on a standardized outside diameter (O.D.). This O.D. was originally selected so thatpipe with a standard O.D. and having a wall thickness that was typical of the period would have an inside diameter (I.D.) approximately equal to the nominal size. Although there is no such relation between the existing standard thicknesses — O.D. and nominal size — these nominal sizes and standard O.D.s continue in use as “standard.”
The manufacture ofpipe NPS 14 (DN 350) and larger is based on the O.D. 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
ThenominalwallthicknessesaregiveninTable2-1.The wall thicknesses for NPS 14 (DN 350) to NPS 22 (DN 550), inclusive, of Schedule 10S; NPS 12 (DN 300) of Schedule 40S; and NPS 10 (DN 250) and NPS 12 (DN 300) ofSchedule 80S are not the same as those of ASME B36.10.
The suffix “S” in the schedule number is used to differentiate B36.19 pipe from B36.10 pipe. ASME B36.10 includes other pipe thicknesses that are also commercially available with stainless steel material.
5 WEIGHTS/MASSES ð22Þ
The nominal weights (masses) 1 ofsteel pipe are calculated values and are tabulated in Table 2-1.
(a) The nominal plainendweight, inpounds perfoot, is calculated using the following equation:
W D t t 10.69(pe)
where
D = outsidediametertothenearest0.001 in. for NPS 8 andsmaller, and to the nearest0.01 in. forNPS 10 and larger(the symbol D is used forO.D. only in mathematical equations or formulas)
t = specified wall thickness, rounded to the nearest 0.001 in.
W pe = 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: = M D t t
6 PERMISSIBLE VARIATIONS
Variations in dimensions differ depending upon the method of manufacture employed in making the pipe to the various specifications available. Permissible varia- tions for dimensions are indicated in each specification.
7 PIPE THREADS Unlessotherwisespecified,thethreadsofthreadedpipe shall conform to ASME B1.20.1. Schedules 5S and 10S wall thicknesses do not permit threading in accordance with ASME B1.20.1.