دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a method of joining steel components in which acetylene gas and oxygen are mixed in a torch to attain the high temperatures necessary for welding. As an early type of welding (it was also called oxyacetylene welding),its primary disadvantage was the seepage of molten weld material onto the interior surface of the pipe, often leading to corrosion problems.

actual cubic feet per minute.

abbr: American Conference of Governmental and Industrial Hygienists.

n: any chemical compound. one element of which is hydrogen, that dissociates in solution to produce free hydrogen ions. For example, hydrochloric acid. HCI, dissociates in water to produce hydrogen ions, H+, and chloride ions, CI-. This reaction is expressed chemically as HCI + H+ + CI- . See ion.

a reactive material with a low pH. Common oilfield mineral acids are HCl and HCl/HF.

n: The soda-lime glass bottle used to hold the hydrofluoric acid. Early directional drilling used acid bottle to survey the inclination.

n: see hydrogen embrinlement.

n: Metal becomes brittle rupture because of absorbing hydrogen.

low ductility of a metal due to its adsorption of hydrogen. More commonly called hydrogen embrittlement.

n: a naturally occurring clay that, after activation, usually with acid, is used mainly as a decolourant or refining agent, and sometimes as a desulphuriser, coagulant, or catalyst.

n: It is made by adding suitable powder of lime or carbonate to the cement.