ASME ANSI B16.9 - Word

American National Standard for Welded and Seamless Wrought Steel Pie

(ANSI/ASME B36.10m-1985)

1

FOREWORD

(This Foreword is not part of ANSI.ASME B36.19M-1985)

This Standard for corrosion resistant piping, designated caregorically as stainless, is based on the same principles that formed the background for the develeopment of ANSI/ASME

B36.10M, Welded and Seamless Wrought Steel Pipe, and reference is made to this source of information.

The wall thicknesses shown for Schedules 40S and 80S are identical with those of Schedules 40 and 80 in ANSI/ASME B36,10M except in the 12 in. size in Schedule 40S and the 10 in. and 12 in. sizes in Schedule 80S. The thickness for these three sizes corresponds to wall thicknesses of Standard wall and Extra-Strong wall.

The more recent development of the highly alloyed stainless steels has brought about a minor confict with convention. With these newer materials, the need for standards is just as great and the present types of threads are just as satisfactory, buth the basic cost of the metal is much higher and the art of fusion welding has developed concurrently. The character of

stainless steel permits the design of thin- wall piping systems without fear of early failure due to corrosion, and the use of fusion welding to join such piping has eliminated the necessity of threading it. For these reasons, the wall thickness dimensions shown under Schedule 10S have been developed, based on the conventional formula, but then modified to correspond to the nearest Birmingham Wire Gage (B.W.G.) number.

Following publication of the 1949 edition there developed a demand for a still lighter wall pipe. A Schedule 5S was determined cooperatively by representatives of chemical companies, processing industries, and manufacturers of welding fittings. This was endorsed by the ASAAA Chemical Industry Correlating Committee and the Manufacturers Standardization Society of the Valve and Fittings Industry. The new schedule was included in the revised standard which waas approved by ASA (now ANSI) on April 7, 1952.

In 1956 it was recommended that the wall thickness of 12 in. 5S be lessened, and a new revision of the standard was issued shortly after its approval by ASA (now ANSI) on february 27, 1957. In this fourth edition, dimensions were expanded beyond 12 in. pipe size by

inclusion of, and reference to, ASTM Specification A 409. This revision was approved by ASA (now ANSI) on October 29, 1965.

The B36 Standards Committee menbership was asked in March 1970 for recommendations as to what action should be taken on ANSI B36.19-1965 since, according to ANSI procedures, this standard was due for revision or reaffirmation. The B36 Standards Committee recommended reaffirmation. This action was approved by the Secretariat and by the American National Standards Institute on May 26, 1971.

In 1975 the B36 Standards Committee undertook a review of the standard, considering its acceptability and usefulness. The results were favorable; some editiorial refinements and updating were proposed along with the incorporation of factors for conversion to SI (metric) units. The revision was approved by the Standards Committee, the Secretariat, and subsequently the American National Standards Institute on October 4, 1976.

This standard was revised in 1984 to include SI metric dimensions. The outside diameter and wall thicknesses were converted to millimenters by multiplying the inch dimensions by 25.4. Outside diameters larger than 16 in. were rounded to the nearest 1mm, and outside diameters 16 in. and smaller were rounded to the nearest 0.1mm. Wall thicknesses were rounded to the nearest 0.01mm. These converted and rounded SI metric dimensions were added in Table 2A. A formula to calculate the SI metric plain end mass, kg/m, using SI metric diameters and thicknesses, was added to Section 5. The SI metric plain end mass was calculated for each size and thickness, and added in Table 3A.

These changes in the standard were approved by the standards Committee, the Sponsor, and the American National Standards Institute, and it was designated an American National Standard on October 7, 1985.

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1Reprinted by permission of the American Society of Mechanical Engineers, 345 East 47th St., New York, NY 10017.

AMERICAN NATIONAL STANDARD/AMERICAN SOCIETY OF MECHANICAL ENGINEERS

STAINLESS STEEL PIPE

1. Scope

This Standard covers the standardization of dimensions 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 numerically larger than the corresponding size. In contrast, the outside diameters of tubes are numerically identical to the size number for all sizes. The wall thicknesses for sizes 14 throught 22 inclusive of Schedule 10S, for size 12 of

Schedule 40S, and those of ANSI/ASME B36.10M. The suffix \"S\" in the Schedule Number is

used to differentiate B36.19M pipe from B36.10M pipe. ANSI/ASME B36.10M INcludes other pipe thicknesses which are also commercially available with stainless steel material. 2. Size

The size of all pipe in Tables 2 through 3A is identified by the nominal pipe size.

The manufacture of pipe in the inch nominal sizes of 1/8-12 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 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 of pipe in nominal sizes of 14 and larger proceeds on the basis of an 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 0.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. Wall thickness

Wariations in dimensions differ depending upon the method of manufacture employed in making the pipe to the various specifications listed in Table 1. Permissible vaariations 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 usig the following formula :

Wpe = 10.68(D - t)t

where

W = nominal plain end weight rounded to the nearest 0.01 lb/ft

D = outside diameter to the nearest 0.001 in. (The symbol D is to be used for O.D. only in mathematical equations or formulas).

t = specified wall thickness rounded to the nearest 0.001 in.

The nominal plain end mass, in kiilograms per meter, is calculated using the following formula :

Wpe = 0.02466 (D - t)t

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1The different grades of stainless steel have different specific densities and hence may weigh more or less than the values lised in this table would indicate (see Table 3, General Note (c)). where

Wpe = nominal plain end weight rounded to the nearest 0.01 kg.m

D = outside diameter to the nearest 0.1 mm for outside diameters which are 16 in. and smaller and to the nearest 1.0 mm for outside diameters larger than 16 in. (The symbol D is to be used for O.D. only in mathematical equations or formulas). t = specified wall thickness rounded to the nearest 0.01 mm NOTE : 1 IN. = 25.4 mm; 1 lb/ft = 1.4895 kg/m. 6. Permissible variations

Unless otherwise specified, the threads of threaded pipe shall conform to ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch).

Schedules 5S and 10S wall thicknesses do not permit threading in accordance with ANSI/ASME B1.20.1. 7. Pipe threads

When the selection of wall thickness depends primarily 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 B31 Code for Pressure Piping, or other similar codes, whichever governs the construction. A thickness will then be selected from the schedules of nominal thickness contained in Tables 2 and 2A to suit the value computed to fulfill the conditions for which the pipe is desired.

TABLE 1 SPECIFICATIONS FOR PIPE WITH ASTM DESIGNATIONS AND TITLES OF STANDARD SPECIFICATIONS TABLE 2 DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL PIPE - CUSTOMARY UNITS 1 TABLE 2A

DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL PIPE - SI UNITS

NOMINAL WEIGHTS OF STEEL PIPE, PLAIN ENDS CUSTOMARY UNITS TABLE 3 TABLE 3A

NOMINAL WEIGHTS OF STEEL PIPE, PLAIN ENDS SI UNITS

Table 1 SPECIFICATIONS FOR PIPE WITH ASTM DESIGNATIONS AND

TITLES OF STANDARD SPECIFICATIONS

ASTM or API Designation ASTM A312 ASTM A358

Title

Specification for Seamless and Welded Austenitic Stainless Steel Pipe

Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service

ASTM A376 Specification for Seamless Austenitic Steel Pipe for High-Temperature Central-Station Service ASTM A409 Specification for Welded Large Diameter Austentic Steel Pipe for Corrosive or High-Temperature Service

TABLE 2 DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL

PIPE - CUSTOMARY UNITS

Inch Nominal Size 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 22 24 30

Outside Diameter,

in. 0.405 0.540 0.675 0.840 1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500 5.563 6.625 8.625 10.750 12.750 14.000 16.000 18.000 20.000 22.000 24.000 30.000

Schedule 5S (1) ... ... ... 0.065 0.065 0.065 0.065 0.065 0.065 0.083 0.083 0.083 0.083 0.109 0.109 0.109 0.134 0.156 0.156 0.165 0.165 0.188 0.188 0.218 0.250

Nominal Wall Thickness, in. Schedule 10S (1) 0.049 0.065 0.065 0.083 0.083 0.109 0.109 0.109 0.109 0.120 0.120 0.120 0.120 0.134 0.134 0.148 0.165 0.180 0.188(2) 0.188(2) 0.188(2) 0.188(2) 0.188(2) 0.250 0.312

Schedule 40S 0.068 0.088 0.091 0.109 0.113 0.133 0.140 0.145 0.154 0.203 0.216 0.226 0.237 0.258 0.280 0.322 0.365 0.375(2) ... ... ... ... ... ... ...

Schedule 80S 0.095 0.119 0.126 0.147 0.154 0.179 0.191 0.200 0.218 0.276 0.300 0.318 0.337 0.375 0.432 0.500 0.500(2) 0.500(2) ... ... ... ... ... ... ...

GENERAL NOTES: (a) 1in. = 25.4 mm

(b) For tolerances, see Section 4.

NOTES :

(1) Schedules 5S and 10S wall thicknesses do not permit threading in accordance with ANSI/ASME B1.20.1.

(2) These dimensions do not conform to ANSI/ASME B36.10M.

TABLE 2A DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL

PIPE - SI UNITS

Inch Nominal Size 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 22 24 30

Outside Diameter,

in. 10.3 13.7 17.1 21.3 26.7 33.4 42.2 48.3 60.3 73.0 88.9 101.6 114.3 141.3 168.3 219.1 273.1 323.9 355.6 406.4 457 508 559 610 762

Schedule 5S (1) ... ... ... 1.65 1.65 1.65 1.65 1.65 1.65 2.11 2.11 2.11 2.11 2.77 2.77 2.77 3.40 3.96 3.96 4.19 4.19 4.78 4.78 5.54 6.35

Nominal Wall Thickness, in. Schedule 10S (1) 1.24 1.65 1.65 2.11 2.11 2.77 2.77 2.77 2.77 3.05 3.05 3.05 3.05 3.40 3.40 3.76 4.19 4.57 4.78(2) 4.78(2) 4.78(2) 5.54(2) 5.54(2) 6.35 7.92

Schedule 40S 1.73 2.24 2.31 2.77 2.87 3.38 3.56 3.68 3.91 5.16 5.49 5.74 6.02 6.55 7.11 8.18 9.27 9.53(2) ... ... ... ... ... ... ...

Schedule 80S 2.41 3.02 3.20 3.73 3.91 4.55 4.85 5.08 5.54 7.01 7.62 8.08 8.56 9.53 10.97 22.70 12.70(2) 12.70(2) ... ... ... ... ... ... ...

GENERAL NOTES: (a) 25.4 mm = 1in.

(b) For tolerances, see Section 4.

NOTES :

(1) Schedules 5S and 10S wall thicknesses do not permit threading in accordance with ANSI/ASME B1.20.1.

(2) These dimensions do not conform to ANSI/ASME B36.10M.

TABLE 2A DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL

PIPE - SI UNITS

Inch Nominal Size 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 22 24 30

Outside Diameter,

in. 10.3 13.7 17.1 21.3 26.7 33.4 42.2 48.3 60.3 73.0 88.9 101.6 114.3 141.3 168.3 219.1 273.1 323.9 355.6 406.4 457 508 559 610 762

Schedule 5S (1) ... ... ... 1.65 1.65 1.65 1.65 1.65 1.65 2.11 2.11 2.11 2.11 2.77 2.77 2.77 3.40 3.96 3.96 4.19 4.19 4.78 4.78 5.54 6.35

Nominal Wall Thickness, in. Schedule 10S (1) 1.24 1.65 1.65 2.11 2.11 2.77 2.77 2.77 2.77 3.05 3.05 3.05 3.05 3.40 3.40 3.76 4.19 4.57 4.78(2) 4.78(2) 4.78(2) 5.54(2) 5.54(2) 6.35 7.92

Schedule 40S 1.73 2.24 2.31 2.77 2.87 3.38 3.56 3.68 3.91 5.16 5.49 5.74 6.02 6.55 7.11 8.18 9.27 9.53(2) ... ... ... ... ... ... ...

Schedule 80S 2.41 3.02 3.20 3.73 3.91 4.55 4.85 5.08 5.54 7.01 7.62 8.08 8.56 9.53 10.97 22.70 12.70(2) 12.70(2) ... ... ... ... ... ... ...

GENERAL NOTES: (a) 25.4 mm = 1in.

(b) For tolerances, see Section 4.

NOTES :

(1) Schedules 5S and 10S wall thicknesses do not permit threading in accordance with ANSI/ASME B1.20.1.

(2) These dimensions do not conform to ANSI/ASME B36.10M.

TABLE 3 NOMINAL WEIGHTS OF STEEL PIPE, PLAIN ENDS CUSTOMARY UNITS

Inch Nominal Size 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 22 24 30

Schedule 5S (1) ... ... ... 0.54 0.69 0.87 1.11 1.28 1.61 2.48 3.03 3.48 3.92 6.36 7.60 9.93 15.19 20.98 23.07 27.90 31.43 39.78 43.80 55.37 79.43

Nominal Wall Thickness, in. Schedule 10S (1) 0.19 0.33 0.42 0.67 0.86 1.40 1.81 2.09 2.64 3.53 4.33 4.97 5.61 7.77 9.29 13.40 18.65 24.17 27.73 31.75 35.76 46.06 5071 63.41 98.93

Schedule 40S 0.24 0.42 0.57 0.85 1.13 1.68 2.27 2.72 3.65 5.79 7.58 9.11 10.79 14.62 18.97 28.55 40.48 49.56 ... ... ... ... ... ... ...

Schedule 80S

0.31 0.54 0.74 1.09 1.47 2.17 3.00 3.63 5.02 7.66 10.25 12.51 14.98 20.78 28.57 43.39 54.74 65.42 ... ... ... ... ... ... ...

GENERAL NOTES: (a) 1lb/ft = 1.4895 kg/m

(b) Weights are given in pounds per linear foot and are for carbon steel pipe with plain ends. (c) The different grades of stainless steel permit considerable variations in weight. The ferritic stainless steels may be about 5% less, and the austenitic stainless steels about 2% greater than the values shown in this table, which are based on weigths for carbon steel.

TABLE 3 NOMINAL WEIGHTS OF STEEL PIPE, PLAIN ENDS CUSTOMARY UNITS

Inch Nominal Size 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 22 24 30

Schedule 5S (1) ... ... ... 0.54 0.69 0.87 1.11 1.28 1.61 2.48 3.03 3.48 3.92 6.36 7.60 9.93 15.19 20.98 23.07 27.90 31.43 39.78 43.80 55.37 79.43

Nominal Wall Thickness, in. Schedule 10S (1) 0.19 0.33 0.42 0.67 0.86 1.40 1.81 2.09 2.64 3.53 4.33 4.97 5.61 7.77 9.29 13.40 18.65 24.17 27.73 31.75 35.76 46.06 5071 63.41 98.93

Schedule 40S 0.24 0.42 0.57 0.85 1.13 1.68 2.27 2.72 3.65 5.79 7.58 9.11 10.79 14.62 18.97 28.55 40.48 49.56 ... ... ... ... ... ... ...

Schedule 80S 0.31 0.54 0.74 1.09 1.47 2.17 3.00 3.63 5.02 7.66 10.25 12.51 14.98 20.78 28.57 43.39 54.74 65.42 ... ... ... ... ... ... ...

GENERAL NOTES: (a) 1lb/ft = 1.4895 kg/m

(b) Weights are given in pounds per linear foot and are for carbon steel pipe with plain ends. (c) The different grades of stainless steel permit considerable variations in weight. The ferritic stainless steels may be about 5% less, and the austenitic stainless steels about 2% greater than the values shown in this table, which are based on weigths for carbon steel.