A term used to identify oilfield wellhead equipment used offshore and below the surface of the water.

An abbreviation for 3,000 pounds per square inch (psi) Maximum Service Pressure.

See Double Extra Strong.

See Fluoropolymer Coating.

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A unit of pressure control equipment with a body and two different end connections used to connect together other pieces of equipment that could otherwise not connect. Sometimes used instead of a Double Studded Adapter because at least one of the units to which it connects has a studded flange connection.

A specification for a high-pressure thread compound that works well to lubricate API casing, tubing and line pipe threads as well as bolts and nuts used to connect flanges and clamps. Do not use compound made to this specification for rotary shoulder connections.

The American Society of Mechanical Engineers. This organization provides standards and specifications for pressure containing equipment and piping, at ambient and high temperatures.

American Society for Testing and Materials. An organization providing a vast array of specifications for test methods and materials, frequently referenced by other standards organizations.

300 series stainless steel with a chemical composition of nickel, 8% minimum, chromium, 16% minimum, and carbon, .08 maximum. All elements measured in % mass fraction.