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Look to
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Measurement Conversion Charts and
Converters
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Jump down to: |
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15 Character Calculator
Microsoft Windows Scientific Calculator
Steel Pipe & Bar Weight Calculator
Fraction - Decimal - Millimeter
Conversion Chart
Millimeter to Inch Conversion Chart
Inch to Metric
Converter Metric to Inch
Converter
°F to
°C Converter
°C to °F Converter
Pound to
Kilogram Converter
Kilogram to Pound Converter
Psi to
MPa Converter MPa to Psi Converter
Ft-Lbs to Joules Converter
Joules to Ft-Lb Converter
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The following
conversion charts and calculators assume
the user most often will want to convert English measurement
to the International (or Metric) System of Weights and Measures.
The content of this section makes no attempt to fully
explain or describe the meaning of terms such as Inch, Millimeter, Foot
Pound, Joule, Kilogram, etc. We use such terms in their common way and
assume the user has a full familiarity with one of the terms used in
each conversion.
The great majority of Oil Field
Equipment in use throughout the world had original designs based on English measurement (or U.S. Customary
Units). Keep in mind that the conversion from one system of measurement to
another will often produce apparent variation. Product geometrical
dimensions or weights, measured by instruments calibrated to one system
when manufactured, will sometimes appear nonconforming when measured with
instruments calibrated to another system. Products manufactured to API
Specifications, and falling within the limits of either the English or
Metric dimensions shown in the Specification, should provide full
interchangeability and reliable performance.
Information drawn from API Spec 6A, to the left and below each converter, may provide useful context for
those users unfamiliar with the results of the conversion. |
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Printer Friendly Version of
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For dimensions not shown above, use
the conversion calculators below.
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To convert feet
to inches, multiply feet by 12 and add any remaining inches. Example: 12 feet, 6 inches = 144 inches + 6 inches =
150 inches.
To convert
millimeters
to meters, move the decimal 3 places to the left.
Example: 1200
millimeters = 1.200 meters.
To convert meters
to millimeters, move the decimal 3 places to the right.
Example: 4.125 meters = 4125 millimeters.
To convert
millimeters
to centimeters, move the decimal 1 place to the left.
Example: 105 millimeters = 10.5 centimeters.
To convert centimeters
to millimeters, move the decimal 1 place to the right.
Example: 10.5 centimeters = 105 millimeters.
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For temperature conversions, use the conversion calculators below.
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API
6A Temperature
Classifications in °F
| Temperature |
Operating Range |
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Classification * |
Degrees Fahrenheit (°F) |
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Min. |
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Max. |
| K |
-75 |
to |
180 |
| L |
-50 |
to |
180 |
| N |
-50 |
to |
140 |
| P |
-20 |
to |
180 |
| R |
Room Temperature |
| S |
0 |
to |
140 |
| T |
0 |
to |
180 |
| U |
0 |
to |
250 |
| V |
35 |
to |
250 |
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* |
PURCHASER MAY
COMBINE TEMPERATURE CLASSES e.g. KU, -75 TO 250 °F |
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API
16A Temperature
Classifications in °F
| Temperature |
Operating Range |
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Classification |
Degrees Fahrenheit (°F) |
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T-75 |
-75 to
250 |
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T-20
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-20 to
250 |
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T- 0
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- 0 to
250 |
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Pound and kilogram weight
conversions.
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Kilogram (abbrev. kilo) - The fundamental unit of weight
measurement in the International System (or Metric System) of Weights and Measures.
This system expresses weights lighter than a kilogram in grams (1
kilogram = 1000 grams).
Pound (abbrev. lb) - The basic unit of measurement in the Imperial
or English system of weight measurement. The Imperial system
expresses weights lighter than a pound in ounces (1 pound = 16
ounces).
The term "Ton" = a pound weight of 2000 pounds (also called Short
Ton).
Oil field "Ton" capacity equipment rated in 2000 pound Tons.
The term "Long Ton" = a pound weight of 2204.6 pounds.
Technically used to represent the displacement of large ships. Most
frequently used to mislead unsophisticated sellers of scrap metal.
The term "Tonne" (abbrev. MT) only applies to weights of 1000
kilograms. |
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Pounds per Square Inch (psi) and MegaPascal (MPa)
or N/mm2 conversions.
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Pounds per Square Inch (abbrev. PSI) - A basic unit of pressure or
tension measurement in the Imperial or English System of Weights
and Measures.
1 psi = .006895 MPa,
1000 psi =
1 ksi
MegaPascal
(abbrev. MPa) - A basic unit of pressure or tension measurement in
the International System of Weights and Measures.
1 MPa - 145 psi,
1 MPa = 1 N/mm2.
For oil field
applications, units of measurement smaller than 1 psi usually have
little meaning. Units of MPa may often appear with a decimal.
Example: 1000
psi = 6.895 MPa.
1 MegaPascal
(MPa) = 1 Newton per Square Millimeter (N/mm2) = 145 Pounds per
Square Inch (psi).
Psi, Ksi, MPa,
and N/mm2 all express force measurement, either pressure (as
fluid pressure) or load (as tension). All of these terms may
appear as pressure ratings or test pressures, and tensile or
yield requirements or test results. |
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API Spec 6A specifies equipment pressure ratings in
both Psi, and MPa as:
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2,000 psi |
= |
13.8 MPa |
= |
138 bar |
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3,000 psi |
= |
20.7 MPa |
= |
207 bar |
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5,000 psi |
= |
34.5 MPa |
= |
345 bar |
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10,000 psi |
= |
69.0 MPa |
= |
690 bar |
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15,000 psi |
= |
103.5 MPa |
= |
1,035 bar |
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20,000 psi |
= |
138.0 MPa |
= |
1,380 bar |
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Bar pressure
provided for information only. |
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To express Psi pressures in bars,
convert Psi to MPa and move the decimal in the MPa value 1 space to
the right, e.g. 5000 Psi = 34.5 MPa = 345 bar. |
API Spec 6A
specifies material property requirements* as:
Material
Designation |
Yield |
Tensile |
|
Psi |
MPa |
Psi |
MPa |
|
36 K
45 K
60 K
75 K |
36,000
45,000
60,000
75,000 |
248
310
414
517 |
70,000
70,000
85,000
95,000 |
483
483
586
655 |
*For Elongation
and Reduction of Area, see API Spec 6A. The values specified
for these requirements do not
require conversion.
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For a table of
Test Pressures for Equipment with Specific End and Outlet Connections,
Click Here.
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Ft-lbs and Joules (J) conversions.
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API
Specification 6A and 16A state requirements for material (steel)
strength measured for Tensile, see Psi to MPa
above Yield, Elongation, and Reduction
of Area. Additionally API 6A requires Charpy V-Notch impact
testing for certain PSL's and temperatures.
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API Spec 6A Charpy V-Notch impact
requirements (10 mm x 10 mm)*
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Temperature
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Minimum average impact value
Longitudinal test (LCVN) / Transverse test (TCVN)
Ft-Lbs (J) |
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Temp.
Class |
Test Temp.
°F (°C) |
PSL 1
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PSL 2
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PSL 3 and
PSL 4 |
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LCVN |
TCVN |
LCVN |
TCVN |
LCVN |
TCVN |
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K |
-75 (-60) |
20
(27) |
15 (20) |
20
(27) |
15 (20) |
20
(27) |
15 (20) |
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L |
-50 (-46) |
20 (27) |
15 (20) |
20 (27) |
15 (20) |
20 (27) |
15 (20) |
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N |
-50
(-46) |
20 (27) |
15 (20) |
20 (27) |
15 (20) |
20 (27) |
15 (20) |
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P |
-20
(-29) |
NR |
NR |
20 (27) |
15 (20) |
20 (27) |
15 (20) |
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R |
0
(-18)
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NR |
NR |
NR |
NR |
20 (27) |
15 (20) |
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S |
0
(-18) |
NR |
NR |
NR |
NR |
20 (27) |
15 (20) |
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T |
0
(-18) |
NR |
NR |
NR |
NR |
20 (27) |
15 (20) |
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U
|
0
(-18) |
NR |
NR |
NR |
NR |
20 (27) |
15 (20) |
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V |
0
(-18) |
NR |
NR |
NR |
NR |
20 (27) |
15 (20) |
| * |
As required in API Spec 6A. |
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Information above, and in other
parts of this Web Site, may help persons who really seek to know. If you
have a question, and you think WOODCO USA may have the capacity to answer
it, please use our
Contact Us link and give us a
chance to help.
WOODCO USA
provides Web Site Tools for identification, estimating, and reference only. Do
not use this information for manufacturing or inspection. Users of these tools
should not use them as a substitute for professional engineering advice.
Anyone making use of the information presented does so at his own risk and
assumes any and all liability resulting from such use.
FOR FURTHER INFORMATION, OR TO LEARN MORE ABOUT WOODCO
USA PRODUCTS AND SERVICES,
CONTACT:
WOODCO USA
P.O. Box 1261
Houston, Texas 77251-1261
Phone: 713-672-9491
USA and Canada: 1-800-496-6326
Fax: 713-672-8768
www.woodcousa.com
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