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.
Learn More  
To get more information about our products, please complete the quotation form and we will contact you within 24 hours.
Many industries benefit from Midstate Steel as their steel pipe distributor.         More Info
Used Pipe
Sign Industry
Construction Industry
Farming & Ranching
Pipeline Companies
Machine & Welding Shops
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)