ASME B36.19:1985 pdf free download – Stainless Steel Pipe
1 SCOPE
This Standard covers the standardization of dimen- sions of welded and seamless wrought stainless steel pipe. The word pipe is used as distinguished from tube to apply to tubular products of dimensions commonly used for pipeline and piping systems. Pipe dimensions of sizes 12 and smaller have outside diameters numeri- cally larger than the corresponding size. In contrast, the outside diameters of tubes are numerically identi- cal to the size number for all sizes. The wall thicknesses for sizes 14 through 22 inclu- sive of Schedule los, for size 12 of Schedule 40S, and for sizes 10 and 12 of Schedule 80s are not the same as those of ANSVASME B36.1OM. The suffi “S” in the Schedule Number is used to differentiate B36.19M pipe from B36.10M pipe. ANSVASME B36.10M in- cludes other pipe thicknesses which are also commer- cially available with stainless steel material.
2 SIZE
The size of all pipe in Tables 2 through 3A is identi- fied by the nominal pipe size. The manufacture of pipe in the inch nominal sizes of Ys-12 inclusive is based on a standardized outside diameter (O.D.). This O.D. was originally selected so that pipe with a standard O.D. and having a wall thickness which was typical of the period would have an inside diameter (I.D.) approximately equal to the nominal size. Although there is no such relation be- tween the existing standard thicknesses – O.D. and nominal size – these nominal sizes and standard O.D.’s continue in use as “standard.” The manufacture of pipe in nominal sizes of 14 and larger proceeds on the basis of an O.D. corresponding to the nominal size.
3 MATERIALS
The dimensional standards for pipe described here are for products covered in the ASTM specifications listed in Table 1 .
4 PERMISSIBLE VARIATIONS
Variations in dimensions differ depending upon the method of manufacture employed in making the pipe to the various specifications listed in Table l. Permis- sible variations for dimensions are indicated in each specification.
5 WEIGHTS
The nominal weights’ of steel pipe are calculated values and are tabulated in Table 3. The nominal plain end weight, lb/ft, is calculated using the following formula:
6 PIPE THREADS
Unless otherwise specified, the threads of threaded pipe shall conform to ANSVASME B1.20.1, Pipe Threads, General Purpose (Inch).
7 WALL THICKNESS SELECTION
When the selection of wall thickness depends pri- marily upon capacity to resist internal pressure under given conditions, the designer shall compute the exact value of wall thickness suitable for conditions for which the pipe is required as prescribed in detail in the ASME Boiler and Pressure Vessel Code, ANSI/ ASME B3 1 Code for Pressure Piping, or other similar codes, whichever governs the construction. A thick- ness will then be selected from the schedules of nomi- nal thickness contained in Tables 2 and 2A to suit the value computed to fulfill the conditions for which the pipe is desired.