Dental hygienist salaries in the United States also vary slightly according to geographical location. District of Columbiaâs dental hygienists earn the highest average salary at $93,940, followed closely by Californiaâs dental hygienists who earn an average of $93,920, and Washington Stateâs dental hygienists who earn $92,610 on average.
In the oil and gas industries, coiled tubing refers to a very long metal pipe, normally 1 to 3.25 in (25 to 83 mm) to in diameter which is supplied spooled on a large reel. It is used for interventions in oil and gas wells and sometimes as production tubing in depleted gas wells.
Tubing is sometimes used for lighter-weight piping, especially those flexible enough to be supplied in coiled form. Fittings (especially uncommon types) require money, time, materials and tools to install, and are an important part of piping and plumbing systems. Valves are technically fittings, but are usually discussed separately.