CONTENTS
 The
International System of Units (SI Units)
 Unit
conversion tables ( page1  page2  page3  page4 )
 Temperature
conversion tables Fahrenheit and
Celsius (Centigrade)
 Properties
of saturated steam and saturated water .
 Liquid
gravity tables and weight factors
 Stainless
steel composition (Percent)
 Standard dimensions
for welded or seamless steel pipe  Decimal size equivalents
 Wire table
, standard annealed copper  American Wire Gauge (B. & S.)
 Viscometer
Comparison Chart for Newtonian liquids .
 Dewcel
range characteristics.
 WEIGHTS AND MEASURES
 ENGLISH UNITS AND METRIC SYSTEM UNITS
 Conversion of English
lineal units into millimeters (pouces  mm )
 Conversion of English
lineal units to millimeters (pouces  mm ) (Cont.)
 Conversion tables
: pounds per square inch, atmospheres, kilograms per square centimeter,
millimeters of mercury.
 Conversion tables:
Pounds per square inch to kilograms per square centimeter
 Conversion tables
: inches, feet, yards into Spanish measures. Conversion of surface measures:
squares inches to square centimeters, square feet to square meters,
square yards to square meters
 Conversion table
of volume measures: cubic inches in cubical centimeters , cubic feet
to cubic meters, cubic yards to cubic meters, cubic meters to cubic
feet or cubic yard, cubic inch to cubic centimeters. cubic foot to cubic
meters, cubic yard to cubic meters
 Area units of measure
: Spanish units and English equivalent units . Conversion of work units.
 Conversion table
: weights , Spanish units and English values .
 Barometrical measures
, conversion of inches to millimeters .
 Capacity units
conversion
 British Standard
Whitworth Thread Form for bolts
 British Standard
Whitworth Thread Form for pipes
 Methods of measurement
of commerce vessels .
 International
screw thread system
 " ACME"
thread system
 Diameters, sections,
weights and electrical resistance of the copper wires according to English,
American and metric standards.
 Diameters, sections,
weights and electrical resistance of the copper wires according to English,
American and metric standards (cont. )
 Specific
electrical resistance ρ and conductance for conductors at 20°C
.Specific electrical resistance ρ of insulators .Electrical coefficients
of temperature α at 20°C .Dielectric constant ε_{r} .Series of electrochemical tension
 (Spanish)
Peso específico , punto de fusión , punto de ebullición
, valor calorífico , calor específico .
 (Spanish)
Resistencia eléctrica específica .Constante dieléctrica
.Coeficientes de temperatura eléctricos .Serie de tensión electroquímica.
 (Spanish)
Elementos químicos , símbolo , peso atómico .
 VALUES
OF SOLID AND LIQUID ELEMENTS : Specific weight , point of fusion , boiling
point , calorific value , heat capacity.
 (Spanish)
Valores para elementos gaseosos , peso específico , punto de
fusión , punto de evaporación , índice calorífico
, calor específico .
The International System of Units
(SI Units)
The
International System of Units (SI units) is rapidly becoming the most commonly
used in the world. However, English units are still in common use in instrumentation
within the United States. Hence this table has been arranged to facilitate conversion
into SI units by placing these conversions first in each list.
The measurement of such quantities as force, pressure, mass, and weight has
in the past often been made through the convenient use of the "force of gravity" without concern for the variation of this force from one location to anotherwhich was normally insignificant in application, though does vary even in the minor difference in elevation between the top of the hill and the bottom . However, as the
process industries have spread geographically, and as processes have required
more sophisticated control, the difference in gravity between the points of
calibration and use of an instrument has become significant more often.
Moreover, even though the values were very close, the practice of ignoring them
was fundamentally wrong.
Most pressure and differential pressure instruments use forms of springs as
elements. Springs measure force directly, independent of the effects of gravity.
Thus most modem pressure instruments will read the same for the same pressure
regardless of local gravity. They are gravityindependent. However, the pressure
standards used to calibrate them are often gravitydependent, since they depend
upon the weight of (the force of gravity on) a column of water or mercury or
fixed masses ("weights") in deadweight testers. Thus, for higher
accuracies, pressure instruments must be calibrated in the location at which
they are to be used, or account taken of the difference in gravity between the
point of calibration and the point of use, even though the instruments
themselves are gravityindependent.
In pneumatic transmission of pressure measurements, the measured variable and
the output signal of the transmitter will be determined at the same local
gravity. Therefore, if the same type of pressure standard is used for both input
and output, both gravitydependent or both gravityindependent, the effect of
local gravity will be cancelled out. In electronic transmission, on the other
hand, the output signal is a current or voltage unaffected by gravity. Thus it
may be necessary to use a gravityindependent standard on the input or to apply
a correction factor for local gravity.
It has long been most common to use the same name for units of mass (the
invariant quantity of matter in a body) and weight (the force of gravity on that
mass, which varies with location). Similarly, the names of pressure units, force
per unit area, usually contain the name of a mass unit instead of a force unit.
As long as variations in gravity with location are insignificant, this practice
does not cause much difficulty. However, the effects of local gravity value are
becoming more significant in comparison with now desired instrument accuracy.
And the fact that in the SI system the unit of force is the Newton, while the
kilogram is reserved strictly for mass, makes it important to designate whether
a nonSI unit such as the pound is being used to describe mass or force (or
weight). This is done by adding the suffix "force" to the name of the
unit. Thus, in nonSI units, the mass of a body is properly described in pounds,
but its inertial force should be described in poundsforce. Common nonSI
pressure units should always be designated as poundsforce per square inch,
kilogramsforce per square centimeter, etc. The letter symbols for these force
units also contain the suffix "f" as in lbf, kgf, etc, However, the
two most common nonSI pressure units named above are usually abbreviated psi
and kg/CM2. These customs are reflected in the table.
The suffix "mass" is sometimes added to nonSI units actually used
as mass units. However, this practice is decreasing as more people grasp the
basic distinction between mass and force or weight.
In the measurement of "weight," the effect of local gravity is
usually compensated for automatically. Either a "nosprings" type of
scale is used, in which the unknown mass is balanced against known masses
("weights"), thus canceling out the effect of variations in local
gravity; or a spring type scale is used, calibrated in place using known masses
("weights"). Thus the quantity often called "weight" is
actually the mass, and must be properly described in mass units , the kilogram
in SI units or the pound and ounce in English units. The only change from past
practice needed is to label the quantity as "mass" instead of
"weight."
Great care has been taken to avoid errors, no responsibility can be taken for
complete accuracy.
HOW TO USE THIS TABLE: Find the unit you want to convert from listed in
capital letters at the lefthand margin and multiply it by the number indicated
to arrive at the unit listed to the right of the number. Where appropriate,
additional information has been provided.
EXAMPLE:
Additional information { 
NOTE: There are several definitions of Btu, differing only
past the third significant digit .If four or more significant digits are
needed, refer to the appropriate handbook. 
DERIVING UNITS: Many categories have several units related by
a power of ten (e.g., Pa and kPa) or by a factor of 60 (e.g., ft/s, ft/min, and
ft/h). Generally, conversion factors are provided for only the proper Sl unit or
the unit most easy to use. There are several shortcuts to deriving units not
listed; following is one reliable method.
Suppose you have a volume per unit time of 1 cfh and you want
to express that in m³/s . Look up Cubic Feet Per Hour and read, "Divide by
60 and refer to Cubic Feet Per Minute." Look up Cubic Feet Per Minute and
find the conversion factor to m³/s (cfm x 4.7195 x 10^(4) = m³/s). String
these together and get
(1 cfh 

Suppose you have a volume per unit time of 1 m³/s and
you want to express that in cfh. Look up Cubic Metres Per Second and find that
the closest conversion factor for cfh is cfm
(m³/s x 2.1189 x 10³ = cfm). Then look up Cubic Feet Per
Minute and find the conversion factor to cfh (cfm x 60 = cfh). String these
together and get
SCIENTIFIC NOTATION: Remember when using a calculator that
positive powers move the decimal point to the right of the 1 (e.g., 10³ =
1000.0) and negative powers move the decimal point to the left of the 1 (e, g.,
10^(3) = 0. 0010).
PRESSURE UNITS: Where density is specified or implied, it is
based on the following:
 Density of water at 60°F = 62.3707 Ib/ft³
 Density of mercury at O°C = 13.5955 g/cm³
MAGNITUDE OF FIGURES: Where practical,
conversion factors over 10^4 or under 10^(4) have not been included. (Factors
have been included for all proper SI units no matter what the multiple.) However,
avoid mixing prefixes within one documentor equation (e.g., don't use kPa,
Pa, and MPa together). 