|
API |
American Petroleum Institute -
issues standards for oil & gas
industry |
|
ASTM |
American Society for Testing
Materials - issues standards for
line pipe |
|
A53A, A53B, A53F, A106 |
ASTM grades of carbon steel pipe |
|
bevel |
angle formed between the
prepared edge of the end of the
tube and a plane perpendicular
to the surface. Standard line
pipe bevel is 30 degrees. |
|
billet |
round, solid bar of steel which
is pierced to form a seamless
tube or pipe |
|
black pipe |
denotes lacquered OD finish (as
opposed to bare or galvanized)
|
|
box |
internal (female) threaded end |
|
Brinell |
hardness testing system which
measures indentation of the
subject using a standard weight,
shaped point |
|
BTC |
buttress threaded and coupled |
|
bundle |
number of pieces (same length)
banded together for shipping.
Height and width is usually 1-2'
but # varies with OD |
|
burst |
internal pressure at which a
tube will yield - often tested
hydrostatically |
|
casing |
pipe used as a structural
retainer for the walls of a
drilled hole |
|
CAD |
computer aided design |
|
CAM |
computer aided manufacturing |
|
CNC |
computer numerically controlled
- refers to machinery |
|
cold drawn |
pipe or tubing which is pulled
through a die to reduce diameter
and wall. This process usually
produces closer tolerances and
higher strength. |
|
chamfer |
beveled end, usually done as a
preliminary operation to
threading |
|
coupling |
short piece used to connect two
lengths of pipe |
|
CW |
continuous weld - a method of
producing small diameter pipe
(1/2-4") |
|
cft |
hundred foot (sometimes 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 30,000#. |
|
DRL |
double random length - line pipe
with a 35'+ average length |
|
drift |
minimum ID clearance verified by
pulling a mandrel of known size
through a length of pipe
|
|
EMI |
electromagnetic inspection - a
method of determining wall
thickness and detecting
imperfections in steel tubes |
|
ERW |
electric resistance weld - most
common form of manufacture for
pipe in sizes from 2 3/8-22" OD |
|
EUE |
external upset ends - forging of
ends on (API) tubing and drill
pipe to provide additional
thickness for strengthening
connections |
|
FOB |
free on board - used to denote
where pipe is to be provided to
the buyer |
|
flush joint |
connection with male and
female threads cut directly into
the pipe (as opposed to T&C).
This provides the same ID and OD
clearance as in the middle of
the tube, once lengths are
joined. |
|
FLD |
full length drift (as opposed to
"end drift") - usually performed
as part of used tubing or casing
(OCTG) inspection |
|
hardfacing |
abrasion-resistant metal applied
by welding (usually in strips)
on the surface of softer
material to increase wear
properties |
|
hoist or lift plug |
pin-threaded sub with hook, eye
or rod on other end; used for
picking up or laying down
threaded pipe, casing or rods.
|
|
ID |
inside diameter |
|
joint |
one length of pipe |
|
LS |
limited service - pipe not
meeting specification, usually
rejected at the mill |
|
LT |
loaded trucks - used in price
quotation to indicate seller
pays for handling
|
|
LTC |
long thread and coupling (OCTG
casing connection) |
|
mid-weld |
two or more joints welded to
form a longer one |
|
nipple |
short length of pipe (<12")
threaded on both ends
|
|
nominal |
pipe size or wall thickness as
specified (not actual). Sizes
refer to approximate ID,
even though OD is the fixed
dimension. |
|
NUE |
non-upset end - OCTG tubing
description (not as common as
EUE) |
|
OCTG |
oil country tubular goods - pipe
made to API specifications |
|
OD |
outside diameter |
|
PEB |
plain end beveled |
|
pin |
external (male) threaded end |
|
protector |
plastic, steel or composite cap
to protect threads from handling
damage |
|
psi |
pounds per square inch
|
|
range (R1, R2, R3) |
lengths of OCTG (see Technical
Data link - dimensional
tolerances) |
|
Rockwell hardness |
relative resistance of a metal
to indentation by a diamond
cone, as expressed in
hardness-scale units (A, B, C or
G) |
|
SAW |
submerged arc weld - a method of
producing very large OD pipe |
|
schedule |
numbers assigned to different
wall thicknesses of pipe (i.e.
sch. 40) |
|
SEA |
special end area - inspection to
check for defects at either end
of a steel tube which is also
being inspected electronically.
(EMI misses the ends.) |
|
shoe |
sub sometimes run on bottom of
casing string with special
metallurgy or design to help
pipe to bottom through tight or
bridged spots in drill hole |
|
skelp |
coiled strips of plate steel
used to produce welded seam pipe |
|
smls. |
seamless - pipe with no weld in
the circumference |
|
spec |
specification |
|
SRL |
single random length - line pipe
with 17.5' minimum average
length |
|
STC |
short thread and coupling (OCTG
casing connection) |
|
std. |
standard - reference to wall
thickness of line pipe (=sch. 40
for 1/8-10") |
|
stencil |
identification painted on pipe.
Specification, size, wall,
grade, test pressure, method of
manufacture and mill are usually
indicated. |
|
sub |
a short coupling with different
types and/or sizes of ends
|
|
T&C |
threaded and coupled. Male (pin)
threads are cut into the pipe
and a coupling provides female
threads for both lengths being
joined |
|
T&D |
tested and drifted - one method
of verifying integrity of used
tubing and casing (OCTG). "Test"
refers to hydrostatic: ends are
sealed and water pumped inside
to a predetermined pressure. See
drift def. above.
|
|
tensile strength |
rating of steel's resistance to
being pulled apart
|
|
tolerance |
specified allowance (plus or
minus) of the given dimension of
a finished product due to
inaccuracies in manufacturing;
usually quite small (thousandths
of an inch or very small
percentage) and often part of a
standard such as ASTM or API. |
|
tool joint |
threaded tube, usually thicker
and harder, welded onto pipe to
provide joint strength and
durability exceeding that of
flush joint or T&C connections |
|
victaulic joint |
grooves in the ends of pipe
accommodate a coupling
|
|
xhy |
extra heavy - pipe about 50%
thicker than standard (=sch. 80
for 1/8-8") |
|
xxhy |
double extra heavy - twice as
thick as xhy for 1/2-6" |
|
yield strength |
tensile stress required to
produce permanent elongation of
a steel tube |
