Phone     : 432-686-7779
Fax          : 432-687-5567
Toll Free : 800-445-9094
We pride ourselves on our 30 + years of industry Experience, Honesty, Loyalty and our dedication to our customers and Vendors. We look forward to serving your pipe needs.
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Many industries benefit from Midstate Steel as their steel pipe distributor.         More Info
Used Pipe
Piling
Sign Industry
Construction Industry
Dredging
Farming & Ranching
Pipeline Companies
Machine & Welding Shops
Trenching
Water Well Drilling
Oil & Gas Companies
Construction Industry

Glossary of Terms

AAR - Association of American Railroads 
AGA - American Gas Association 
AISI - American Iron & Steel Institute 
ANSI - American National Standards Institute - Formerly ASA 
API - American Petroleum Institute 
ASA - American Standard Institute - Now known as ANSI 
ASM - American Society for Metals 
ASME - American Society of Mechanical Engineers 
ASTM - American Society for Testing Materials 
AWWA - American Water Works Association 
BALES - Banded lifts of pipe 
BAR MILL - Rolling mill where blooms are processed for form billets 
BESS - Bessemer 
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. 
BILLET - Round, solid bar of steel which is pierced to form a seamless tube or pipe. 
BLK - Black - Term used when O.D. surface of pipe is protected with a varnish-type oil. Also applies to bare pipe to denote 
not galvanized. 
BLOOM - A semifinished hot rolled product produced on a blooming mill. 
B.O.F. - Basic Oxygen Furnace 
B.O.P. - Basic Oxygen Process 
BRIGGS STANDARD - A standard of thread dimensions. Same as American Standard 
B.T.U. - British Thermal Unit 
BLDS - Bundles - practice of packaging pipe from NPS 1/8 to NPS 1-1/2. Pieces per bundle vary with size. 
BURST TEST -A destructive hydraulic test to determine actual yield strength and ultimate strength of seamless 
and welded pipe. 
B.W. Butt Weld Pipe - See Continuous Weld Pipe 
B.W.G. - Birmingham Wire Gauge 
CASING - Pipe used as a structural retainer for the walls of a water, gas, or oil well. 
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. 
CHAMFER - A beveled surface to eliminate an otherwise sharp corner. A finishing operation prior to threading. 
CHEMICAL PROPERTIES - Normally associated with a limited number of chemical elements. Minimum or maximum limits 
are established in most ASTM and API specifications. 
CUT LENGTH - Pipe cut to a specific length as ordered. 
CON CAST - Continuous Cast 
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. 
CPLG - Coupling - threaded sleeve used to connect two lengths of pipe. 
C.W. - Continuous Weld - method of producing pipe normally in sizes from ½ inch to 4 inch. 
CU - Copper 
C.W.T. - per hundred weight 
DIA - Diameter 
DIE STAMPING - Permanent marking placed on pipe as required in some specifications. 
DOUBLE EXTRA HEAVY -Also known as double extra strong. Available from NPS 1/2 to NPS 8 nominal pipe. Wall 
thickness is twice as heavy as extra heavy pipe with the exception of 8 inch diameter. 
DRL - Double Random Length (35 foot minimum average) 
DRIFTED - Attaining a certain minimum I.D. clearance by pushing a mandrel through pipe or tubing. 
DRIVE PIPE - Pipe used for driving into ground in water well applications. Supplied with drive coupling. 
DUCTILITY - The ability of a material to deform plastically without fracturing. Measured by elongation in a 
tensile test. 
ERW - Electric Resistance Weld Pipe - method of producing pipe normally in sizes from 2-3/8" OD through 22" OD. 
E.U.E. - External Upset Ends - used in API tubing and drill pipe. 
EXPANDED PIPE - Pipe which has been enlarged circumferentially by mechanical or hydraulic pressure. 
EXTRA HEAVY - Also known as extra strong - pipe with walls heavier than standard weight. Same as schedule 80 in sizes 
NPS 1/8 to NPS 8 diameter. 
F.O.B. - Free on Board 
FRT - Freight 
GALV - Galvanizing - coating pipe with a protective coating of zinc. 
GRADE A OR B - Designations used to indicate minimum yield and tensile strengths of steel in seamless and welded pipe.
G.T. - Gross Ton - 2,240 pounds 
HYDROSTATIC TESTING - High pressure water test to predetermine pressures as required by specifications. 
I.D. - Inside Diameter - The O.D. measurement less double the wall thickness is the I.D. measurement of a pipe or tube. 
INGOT - Usually first solid form of steel. Suitable for reworking or remelting. 
I.P.S. - Iron Pipe Size - Same as nominal size from 1/8 inch to 12 inch. 
JOINT - Term used to refer to one length of pipe. 
LGTH - Length 
L.T.C. - Long threads and coupling (OCTG) 
LARGE O.D. PIPE - Pipe NPS 14 and larger 
LW. - Lap Weld - Old method of producing pipe 5 inch diameter and over. Has not been produced for 25+ years. 
MECHANICAL PROPERTIES - Tensile strength, elongation, hardness and fatigue limit of steel. 
MID-WELDS - Two or more joints welded to form one long joint. 
MINIMUM WALL - Minimum thickness permissible calculated by subtracting minus tolerance from nominal wall. 
MN - Manganese 
N.A.S.P.D. - The National Association of Steel Pipe Distributors 
N.B.S. - National Bureau of Standards 
NI - Nickel 
NIPPLE - Short length of pipe 12 inches and under normally threaded both ends. 
NOM - Nominal - name given to standard pipe designations 1/8 inch through 12 inch. Does not indicate actual 
I.D. measurements. Wall thickness are also expressed as nominal. 
N.T. - Net Ton - 2,000 pounds 
O.D. - Outside diameter 
O.H. - Open hearth 
PCS - Pieces 
P.E. - Plain ends 
PERC - Plain end roller cut 
PESC - Plain end square cut or saw cut or machine cut 
PICKLING - Pipe immersed in acid bath to remove scale, oil, dirt, etc. 
PROTECTOR - Sleeve with threads to protect threads 
PSI - Pounds per square inch. 
RANGE - Allowable lengths in oil field casing and tubing. Expressed as Range 1(20 foot R/L), Range 2 (30 foot R/L) and 
Range 3 (40 foot R/L). 
R/L - Random Length. Varying lengths of pipe. 
R&D - Reamed and Drifed - commonly used in water wells to guarantee I.D. clearance 
SAW - Submerged Arc Weld - a method of producing very large OD pipe. 
SCALE - An oxide of iron which forms on the surface of steel. 
SCHEDULE NUMBERS - ANSI numbers assigned to pipe to designate wall thickness. 
SKELP - Long narrow strips of plate of correct thickness and width to produce CW or ERW pipe. 
SMLE - Seamless - pipe without a seam or weld in the circumference. 
SPEC - Specification 
SRL - Single Random Lengths - usually 16 foot to 22 foot. Minimum average of 17'6". 
S.T. & C. - Short Thread & Coupled (OCTG). 
STD - Standard - Same as Sch. 40, NPS 1/8- NPS 10 
STENCIL - Identification painted on pipe. Specification, size, wall, grade, test pressure, method of manufacture and mill 
identification are usually indicated. 
STRAND(S) - Product of Continuous Cast Process 
STRETCH REDUCE - A technique employed in the manufacture of CW 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. 
TBE - Thread Both Ends 
T & C - Threaded and Coupled 
TOE - Thread One End 
TENSILE STRENGTH - Ultimate bursting strength to resist being pulled apart. Expressed in P.S.I. 
TUBE ROUND - Billet 
VICTAULIC JOINT - Pipe is grooved near ends to accommodate a victaulic coupling. 
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. 
XHY - Extra Heavy (Extra Strong) 
XXHY - Double Extra Heavy (Double Extra Strong)