We have 22 entries in our Glossary for this letter.
NACE - North American Corrosion Engineers
Responsible for standard MR0175 outlining material requirements for sour applications
An oil distillate. Naphta is an intermediate product between gasoline and kerosene.
It is known as a light product because of the low molecular weight of the hydrocarbons making it up.
US National Aeronautical Society
Produced Hydraulic Fluid Cleanliness Standards NAS 1638 widely used for land based equipment.
Hydraulic Cleanliness Toolbox Page
Petroleum in gaseous form consisting of light hydrocarbons often found in association with oil.
Methane is the most dominant component.
Navaid - NAVigation AID
Beacon; wave off light etc installed on a platform or rig to warn ship and aircraft of installation
Term used when specifying a pipe size.
Norwegian Continental Shelf
Non Destructive Examination e.g. magnetic particle inspection; x-ray etc
Non Destructive Testing e.g. magnetic particle inspection; x-ray etc
National Electrical Manufacturers Association
Leading US trade association which sets standards relating to electrically powered instrumentation.
National Fire Prevention Association
North American non profit organisation
NGL - Natural Gas Liquification
The name given to the process and the associated plant required to make Liquified Natural Gas (LNG).
National Insurance Contributions
Nuclear Magnetic Resonance
A technology used for well logging - amongst other things it allows reservoir fluids (oil gas and water) to be measured.
The Netherlands Oil and Gas Exploration and Production Association
Naturally Occurring Radioactive Material
Independent Testing Laboratory recognised to perform tests; audit quality systems and issue reports and certificates of conformity
NOx - Nitrogen Oxides
The term used to describe the sum of nitric oxide (NO); nitric dioxide (NO2) and other oxides of nitrogen which play a major role in the formation of ozone.
NPSH - Net Positive Suction Head
Minimum suction pressure required by a pump to prevent cavitation
NPT - Normal Pressure and Temperature
NTP is used in many thermodynamic calculations and tabulations and is defined as 20 degrees Celsius and 1 atmosphere of pressure.
NPV - Net Present Value
The cost of a product or system calculated in the present-day currency
Found by subtracting a projectís initial investment from the present value of the cash inflows discounted at a rate equal to the firmís cost of capital.
NUI - Normally Unmanned Installation
Usually used with reference to satellite oil or gas platforms
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