Glossary of Pipe Terms

Glossary of Pipe Terms
Term Description
API American Petroleum Institute — issues standards for oil & gas industry
ASTM American Society for Testing Material — issues standards for line pipe
AWWA American Water Well Association — issues standards for water well pipe
A53A/A53B/A53F ASTM grades of carbon steel pipe — ERW & CW
A106 ASTM grade of carbon steel pipe — Seamless
BW old term for continuous weld pipe in sizes 4 inches and under
Bevel (BEV) angle formed between the prepared edge of the end of pipe and a plane perpendicular to the surface. Standard line pipe bevel is 30 degrees.
Black Pipe (BLK) denotes lacquered OD finish (as opposed to bare or galvanized)
Bundle number of pieces (same length) banded together for shipping. Height and width is usually 1-2 feet but pounds per bundle vary by size of pipe.
Burst internal pressure at which pipe will yield — often tested hydrostatically
Casing pipe used as a structural retainer for the walls of a drilled hole
Cold drawn pipe or tubing that is pulled through a die to reduce diameter and wall. This process usually produced closer tolerances and higher strength.
Coupling short piece used to connect to lengths of pipe
CW Continuous Weld — method of producing smaller diameter pipe in sizes 4 and under. Also known as BW.
Cft hundred foot (used in pricing, i.e. $425.97/cft vs. $4.2597/ft)
Cwt hundred weight. Often used in handling or trucking pricing, i.e. .30/cwt loadout charge or $1.65/cwt (freight) with a minimum such as 40,000 pounds.
DRL Double Random Length - usually 35ʼ to 45ʼ lengths of pipe
DSAW Double Submerged Arc Weld — welding process wherein the welding arc is submerged in flux while the welding takes place. Both inside and outside welds are required and are usually accomplished in separate processes. Used in producing very large OD pipe.
ERW Electric Resistance Weld — most common form of manufacture for pipe in sizes from 2 3/8 - 22 inch OD
FOB Free on Board — used to denote where pipe is to be provided to buyer
Fiber Optic Casing carbon steel pipe, bare or galvanized, usually in HRL, threaded on both ends, with a coupler on one end, and a thread protector on the other end.
GRC Galvanized Rigid Conduit
GALV galvanized carbon steel pipe
HRL Half Random Length — half length of steel pipe usually 10ʼ-0 to 10ʼ-6, but can vary from 8ʼ-0 to 12ʼ-0.
ID Inside Diameter
Joint one length of pipe
LS Limited Service — pipe not meeting specifications, usually rejected at the mill
MTR Mill Test Report — report prepared by a certified metallurgist certifying that the pipe meets the physical and chemical properties required.
Mid-weld two or more joints welded to form a larger one
Nipple short length of pipe (usually less than 12 inches) threaded on one or both ends
Nominal pipe size or wall thickness as specified (not actual). Sizes refer to approximate ID, even though OD is the fixed dimension.
OCTG Oil Country Tubular Goods — pipe made to API specification
OD Outside Diameter
PE Plain End
Psi pounds per square inch
Prime refers to first quality pipe for which MTRʼs can be provided
R2 Range 2 — pipe in random lengths from 23ʼ-0 to 35ʼ-0
Reject pipe that has failed one or more certification tests at the mill and for which no MTRʼs will be provided and to which no guaranties or warranties can be made
Schedule numbers assigned to different wall thickness of pipe (i.e. sch 40)
Secondary same as reject
Smls seamless — pipe with no weld in the circumference
Spec specification
SRL Single Random Length — line pipe in random length from 16ʼ-0 to 24ʼ-0
Std. Standard — reference to the wall thickness of pipe (equals sch 40 for 1/8 through 10”)
Stencil identification painted on pipe. Specification, size, wall, grade, test pressure, method of manufacture and mill are usually indicated.
Structural pipe intended for structural use and for which hydrostatic pressure test is not provided (i.e. A500)
T&C Threaded & Coupled. Male threads are cut into the pipe and a coupling provides female threads for both lengths being joined.
TBE Threaded Both Ends
TOE Threaded One End
Tensile Strength rating of steelʼs resistance to being pulled apart
Tolerance specified allowance +/- of the given dimension of a finished product due to inaccuracies in manufacturing, usually quite small (thousands of an inch or a very small percentage) and often part os a standard such as ASTM or API.
Type E ERW pipe
Type F CW pipe
Type S Seamless pipe
UL Underwriters Laboratories
Victaulic Groove rolled or cut grooves in the end of a pipe to accommodate a victaulic coupler
Xhy Extra heavy — pipe about 50% thicker than standard pipe
Xxhy Double Extra Heavy — about twice as thick as xhy
Yield tensile stress required to produce permanent elongation of steel pipe