||American National Standards Institute. Formerly
the ASA - American Standards Assoc.
American Petrolium Institute
||American Society for Mechanical Engineers.
||American Society of Testing Materials.
||American Water Works Association.
||Term associated with banded lifts of pipe.
||An equation which shows the relationship of internal pressure
to allowable stress, nominal thickness and diameter.
||The angle formed between the prepared edge of the end
of the pipe and a plane perpendicular to the surface of
the member. The standard bevel for line pipe is 30o to facilitate
||A solid semi-finished round or square product that has
been hot worked by forging, rolling or extrusion. For seamless
tubular products, the billet is heated and pierced to form
a tube hollow.
||Term associated with pipe surface
whereby the pipe will not be coated with mill spray oil
and grease spots and cutting oil will not be removed.
||Term associated with pipe surface whereby the pipe will
not only be coated with mill spray oil and all grease spots
and cutting oil will be removed by washing.
||Term associated with pipe surface whereby material ordered
in this manner is protected with a varnish-type oil on the
O.D. for temporary corrosion protection during transit and
in short-term storage.
||Term associated with practice of packaging NPS 1-1/2"
and smaller pipe. Pieces per bundle vary depending upon
||A destructive hydraulic test employed to determine actual
yield strength and ultimate strength of both seamless and
||See Continuous Weld.
||A beveled surface to eliminate an otherwise sharp corner.
||Normally associated with a limited number of chemical
elements; however, depending upon the specification, practically
a full analysis may be required. Minimum or maximum limits
are established in Standards.
||Deforming metal plastically at a temperature lower than
the recrystallization temperature. Mechanical or hydraulic
expansion employed to achieve higher mechanical properties.
||Pipe serving as a duct for electrical wiring.
||Threaded sleeve used to connect two lengths of pipe.
||In common usage, a phrase for continuous butt weld. Furnace-welded
pipe produced in continuous lengths from coiled skelp and
subsequently cut into individual lengths, having its longitudinal
butt joint forge welded by the mechanical pressure developed
in rolling the hot-formed skelp through a series of round
pass welding rolls.
||Pipe cut to a specific length as ordered.
||Permanent marking placed on pipe as required by some specifications.
Deutch Institute Normung
|Double Extra Strong
||Standard pipe weight designation (XXS). Sometimes described
as XXH (double extra heavy).
||Double Random Length (35' minimum average or as defined
||Double Submerged Arc Weld.
||The ability of a material to deform plastically without
fracturing, being measured by elongation or reduction of
area in a tensile test or by other means.
||Non-destructive testing method in which
eddy-current flow is induced in the test object. Changes
in the flow caused by variations in the object are reflected
into a nearby coil or coils for subsequent analysis by suitable
instrumentation and techniques.
||Electric Resistance Weld. See High Frequency Welding.
||Electric Weld. See High Frequency Weld.
||In tensile testing, the increase in the gage length, measured
after fracture of the specimen within the gage length, usually
expressed as a percentage of the original gage length.
||Pipe which has been enlarged circumferentially by mechanical
or hydraulic pressure.
||Standard pipe weight designation (XS). Sometimes described
as XH (extra heavy).
||A quality test for pipe in which a specimen is flattened
between parallel plates that are closed to a specified height.
||Covering of iron or steel surfaces with a protective layer
of zinc (weight defined in specifications).
|High Frequency Welding
||A technique employed in the manufacture of electric resistance
weld pipe. Typical radio frequency power for welding is
supplied at 450,000 cycles/sec.
||Permanent marking placed on pipe as employed by manufacturer
or as established by specification.
||Normal mill test as required by specifications. The pipe
ends are sealed and high pressure water is introduced to
predetermined pressures as required by specifications.
||A test performed at a specified temperature (usually lower
than ambient) to determine the behavior of materials when
subjected to high rates of loading, usually in bending,
tension or torsion. The quantity measured is the energy
absorbed in breaking the specimen by a single blow, as in
a Charpy Test.
||Continuous printing identification associated with NPS
1-1/2 and smaller pipe. Detail is normally limited to the
trademark and "Made in USA".
||A unit of weight equal to 1,000 pounds used to express
||Term associated with separated segments of pipe (banded
or unbanded for ease of handling).
||One of several methods of non-destructive testing. A non-destructive
method of inspection for determining the existence and extent
of possible defects in ferromagnetic materials. Finely divided
magnetic particles, applied to the magnetized part, are
attracted to and outline the pattern of and magnetic-leakage
fields created by discontinuities.
||The properties of a material that reveal its elastic and
inelastic behavior where force is applied, thereby indicating
its suitability for mechanical application; for example,
tensile strength, elongation, hardness and fatigue limit.
||A dimensionless designator for such traditional terms
as "nominal diameter", "size", and "nominal size". Corresponds
to actual outside diameter only in sizes 14 inches and over.
||Heating a ferrous material to a suitable temperature above
the transformation range and then cooling in air to a temperature
substantially below the transformation range.
||See Black Oiled.
||Pipe immersed into acid bath for removal of scale, oil,
||Pounds per square inch.
||Pounds per square inch gage.
|R & D
||Reamed and Drifted. Pipe commonly used in water wells
which has a special, heavy-duty coupling and a guaranteed
||Square cut plain end pipe.
||A piece or strip of metal produced to a suitable thickness,
width and edge configuration, from which welded pipe is
||Single Random Length (16-22 ft. for standard weight ASTM
pipe or as defined in specifications).
||Paint spray identification placed on pipe. Specification
size, wall, grade, test pressure, method of manufacture
and normal mill characters and mill identification are usually
included; however, detail varies by specificaton. "Country
of Origin" is included.
||A technique employed in the manufacture of continuous
weld pipe and in certain instances in the manufacture of
seamless and electric resistance weld pipe. It involves
one or several "master" sizes which are stretch-reduced
or rolled under tension through a number of stands to achieve
a variety of standard pipe diameters and walls.
||A sheet of metal in which the length is many times the
||Threaded Both Ends.
||Threaded and Coupled.
||In tensile testing, the ratio of maximum load to original
cross-sectional area. Also, called ultimate strength. Usually
expressed in pounds per square inch.
||An electronic method of non-destructive testing utilizing
||The stress at which a material exhibits a specified deviation
from proportionality of stress and strain. An offset of
0.2% is used for many metals including steels.