| AAR | Association of American Railroads
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| AGA | American Gas Association
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| AISI | American Iron & Steel Institute
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| ANSI | American National Standards Institute — Formerly ASA
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| API | American Petroleum Institute
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| ASA | American Standard Institute — Now known as ANSI
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| ASM | American Society for Metals
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| ASME | American Society of Mechanical Engineers
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| ASTM | American Society for Testing Materials
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| AWWA | American Water Works Association
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| BALES | Banded lifts of pipe
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| BAR MILL | Roiling mill where blooms are processed to form billets
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| BESS | Bessemer
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| BEVEL | The angle formed between the prepared edge of the end of the pipe and a plane perpendicular to the surface. Standard line pipe bevel is 30 degrees.
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| BILLET | Round solid bar of steel which is pierced to form a seamless tube or pipe.
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| BLK | term used when O.D. surface of pipe is protected with a varnish-type oil. Also applies to bare pipe to denote not galvanized.
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| BLOOM | A semifinished hot rolled product produced on a blooming mill.
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| B.O.F. | Basic Oxygen Furnace
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| BRIGOS STANDARD | A standard of thread dimensions. Same as American Standard
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| B.T.U. | British Thermal Unit
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| BLDS | Bundles — practice of packaging pipe from 1/8 inch to 1 1/2 inch. Pieces per bundle vary with size.
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| BURST TEST | A destructive hydraulic test to determine actual yield strength and ultimate strength of seamless and welded pipe.
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| B.W. | Butt Weld Pipe — See Continuous Weld Pipe
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| B.W.G. | Birmingham Wire Gauge
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| CASING | Pipe used as a structural retainer for the walls of a water, gas, or oil well.
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| C.D. | Cold Drawn — Drawing pipe or tubing through a die to reduce diameter and wall, to obtain closer tolerances, a better finish or higher physical properties.
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| CHAMFER | A beveled surface to eliminate an otherwise sharp corner. A finishing operation prior to threading.
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| CHEMICAL PROPERTIES | Normally associated with a limited number of chemical elements. Minimum or max imum limits are established in most ASTM and API Specifications.
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| CUT LENGTH | Pipe out to a specific length as ordered.
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| CONDUIT | Pipe serving as a duct for electrical wiring. Usually supplied In 10 foot lengths, threaded and coupled. Pipe used is normally galvanized, slightly lighter than standard weight with a smooth interior surface.
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| CPLG | Coupling — threaded sleeve used to connect two lengths of pipe.
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| C.W. | Continuous Weld — method of producing pipe normally in sizes from ½ inch to 4 inch.
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| CU | Copper
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| C.W.T. | per hundred weight
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| DIA | Diameter
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| DIE STAMPING | Permanent marking placed on pipe as required in some specifications.
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| DOUBLE EXTRA HEAVY | Also known as double extra strong. Available from ½ inch to 8 inch nominal pipe. Wall thickness is twice as heavy as extra heavy pipe with the exception of 8 Inch diameter.
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| DRL | Double Random Length (35 foot minimum average)
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| DRIFTED | Attaining a certain minimum I.D. clearance by pushing a mandrel through pipe or tubing.
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| DRIVE PIPE | Pipe used for driving into ground in water well applications. Supplied with drive coupling.
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| DUCTILITY | The ability of a material to deform plastically without fracturing. Measured by elongation in a tensile test.
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| ERW | Electric Resistance Weld Pipe — method of producing pipe normally in sizes from 2 3/8” O.D. through 22” O.D.
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| E.U.E. | External Upset Ends — used in API tubing and drill pipe.
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| EXPANDED PIPE | Pipe which. has been enlarged circumferentially by mechanical or hydraulic pressure.
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| EXTRA HEAVY | Also known as extra strong — pipe with walls heavier than standard weight. Same as schedule 80 in sizes 1/8 inch to 8 Inch diameter.
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| F.O.B. | Free on Board
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| FRI Freight
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| GALV, Galvanizing | coating pipe with a protective coating of zinc.
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| GRADE A OR B | Designations used to indicate minimum yield and tensile strengths of steel in seamless and welded pipe.
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| G.T., Gross Ton | 2,240 pounds
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| HYDROSTATIC TESTING | High pressure, water test to predetermine pressures as required by specifications.
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| l.D., Inside Diameter | The O.D. measurement less double the wall thickness is the I.D. measurement of a pipe or tube.
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| INGOT | Usually first solid form of steel, Suitable for reworking or remelting.
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| I.P.S., Iron Pipe Size | Same as nominal size from 1/8 inch to 12 Inch.
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| JOINT | Term used to refer to one length of pipe.
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| LGTH | Length
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| L.T.C. | Long threads and coupling (OCTG)
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| LARGE O.D. PIPE | Pipe 14 inch O.D. and larger
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| L.W., Lap Weld | Old method of producing pipe 5 inch diameter and over.
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| MECHANICAL PROPERTIES | Tensile strength, elongation, hardness and fatigue limit of steel.
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| MID-WELDS | Two or more Joints welded to form one long joint.
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| MINIMUM WALL | Minimum thickness permissible calculated by subtracting minus tolerance from nominal wall.
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| MN | Manganese
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| N.A.S.P.D. | The National Association of Steel Pipe Distributors
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| N.B.S. | National Bureau of Standards
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| Ni | Nickel
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| NIPPLE | Short length of pipe 12 inches and under normally threaded both ends.
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| NOM—Nominal | name given to standard pipe designations 1/8 inch through 12 inch. Does not indicate actual I.D. |
| N.T., Net Ton | 2,000 pounds
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| O-D. | Outside diameter
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| O.H. | Open hearth
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| PCS | Pieces
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| P.E. | Plain ends
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| PERC | Plain end roller cut
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| PESC | Plain end square cut or saw cut or machine cut
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| PICKLING | Pipe immersed in acid bath to remove scale, oil. dirt, etc.
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| PROTECTOR | Sleeve with threads to protect threads
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| PSI | Pounds per square inch.
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| RANGE | Allowable lengths in oil field casing and tubing. Expressed as Range 1 (20 foot R/L). Range 2(30 foot RIL) and Range 3 (40 foot R/L).
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| R/L | Random Length. Varying lengths of pipe.
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| R&D | Reamed and Drifed — commonly used in water wells to guarantee I.D. clearance
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| SAW | Submerged Arc Weld — a method of producing very large OD pipe.
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| SCALE | An oxide of Iron which forms on the surface of steel.
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| SCHEDULE NUMBERS | ANSI numbers assigned to pipe to designate wall thickness.
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| SMLS—Seamless | pipe without a seam or weld in the circumference.
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| SPEC | Specification
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| SKELP | Long narrow strip of plate of correct thickness and width to produce CW or ERW pipe. SRL, Single Random Lengths — usually 18 foot to 22 foot. Minimum average of 17’6”.
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| S.T. & C. | Short Thread & Coupled (OCTG).
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| STENCIL | identification painted on pipe. Specification, size, wall, grade, test pressure, method of manufacture and mill identification are usually indicated.
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| STO | Standard — Same as Sch. 40 1/8”-1.0”
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| STRETCH REDUCE | A technique employed in the manufacture of OW pipe in which one or several master sizes of pipe are produced, then stretched reduced through a number of rolls to achieve a variety of pipe diameters. Also used in certain instances in seamless and ERW manufacturing.
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| TBE | Thread Both Ends
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| T & C | Threaded and Coupled
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| TOE | Thread One End
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| TENSILE STRENGTH | Ultimate bursting strength to resist being pulled apart. Expressed in P.S.I.
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| TUBE ROUND | Billet
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| VICTAULIC JOINT | Pipe is grooved near ends to accommodate a victaulic coupling.
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| YIELD STRENGTH | The tensile stress required to produce a total elongation of .5 percent of the gauge length as determined by an extensometer. Expressed in P.S I.
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| XHY | Extra Heavy (Extra Strong)
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| XXHY | Double Extra Heavy (Double Extra Strong) |