Steel Pipe Dimension, Steel Tube Sizes Chart

Dimensional standard	Application	Dimensional Table
API 5CT	Specification for casing and tubing	View of Dimensional Table
API 5L	Specification for line pipe	View of Dimensional Table
ASME ANSI B36.10	Welded and seamless wrought steel pipe	View of Dimensional Table
ASME ASME B16.9	Factory-made wrought steel buttwelding fitting	View of Dimensional Table
ASTM A106	Seamless carbon steel pipe for high-temperature service	View of Dimensional Table
ASTM A179	Seamless cold drawn low-carbon steel heat exchanger and condenser tubes	View of Dimensional Table
ASTM A192	Seamless carbon steel boiler tubes for high-pressure service	View of Dimensional Table
ASTM A210	Seamless medium-carbon steel boiler and superheater tubes	View of Dimensional Table
ASTM A213	Seamless ferritic and austenitic alloy-steel boiler, superheater and heat-exchanger tubes	View of Dimensional Table
ASTM A335	Seamless ferritic alloy-steel pipe for high-temperature service	View of Dimensional Table
ASTM A519	Seamless carbon and alloy steel mechanical tubing	View of Dimensional Table
ASTM A53	Pipe steel, black and hot-dipped, zinc-coated, welded seamless	View of Dimensional Table
ASTM A312	Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes	View of Dimensional Table
BS 1387	Screwed and socketed steel tubes and tubulars for plain end steel tubes	View of Dimensional Table
DIN 2391	Seamless precision steel tubes	View of Dimensional Table
DIN 2440	Steel tubes, medium weight suitable for screwing	View of Dimensional Table
DIN 2448	Plain end seamless steel tubes	View of Dimensional Table
EN 10210	Hot finished structural hollow sections of non-alloy and fine grain stuctural steel.	View of Dimensional Table
EN 10216	Seamless steel tubes for pressure purposes. Unalloyed steel tubes with specified room temperature	View of Dimensional Table
EN 10219	Cold formed welded structural sections of non-alloy and fine grain steels	View of Dimensional Table
JIS G3454	Carbon steel pipes for pressure service.	View of Dimensional Table

Introduction of terms related to steel pipe dimensions:

Dimension
1. Nominal dimension: It is the nominal dimension specified in the standard, which is the ideal dimension that users and manufacturers want to get, and it is also the order dimension specified in the contract.
2. Actual dimension: It is the actual dimension obtained during the production process, which is often larger or smaller than the nominal dimension. This phenomenon of larger or smaller than the nominal dimension is called deviation.
3. Meter weight: weight per meter = 0.02466*wall thickness*(OD-wall thickness)

Deviation and tolerance
1. Deviation: In the production process, because the actual steel pipe dimension is difficult to meet the nominal steel pipe dimension requirements, that is, often larger or smaller than the nominal dimension, so the standard stipulates that the actual dimension and nominal dimension between the allowed a difference. The difference is called positive deviation, the difference is called negative deviation.
2. Tolerance: The sum of the absolute values of positive and negative deviation values specified in the standard is called tolerance, also called "tolerance zone".
Deviation is directional, that is, "positive" or "negative"; tolerance is not directional, therefore, the deviation value called "positive tolerance" or "negative tolerance" is wrong.

Uneven wall thickness
Steel pipe wall thickness can not be the same everywhere, in its cross-section and longitudinal pipe body objective wall thickness inequality phenomenon, that is, wall thickness unevenness. In order to control this unevenness, in some steel pipe standards specify the wall thickness unevenness of the allowable indicators, generally not more than 80% of the wall thickness tolerance (after consultation between supply and demand).

Ellipticity
In the cross-section of the round steel pipe there is the phenomenon of unequal outside diameter, that is, there is not necessarily perpendicular to each other, the maximum outside diameter and the minimum outside diameter of the difference between the maximum outside diameter and the minimum outside diameter is the ellipticity (or not roundness). In order to control the ellipticity, some steel pipe standards specify the allowable index of ellipticity, generally specified as not more than 80% of the outside diameter tolerance (after consultation between the supply and demand for implementation).

Curvature
Steel pipe is curved in the direction of length, the curvature is expressed in figures called bend. The standard bending degree is generally divided into the following two kinds.
1. The local curvature: a meter-long ruler against the maximum bend in the steel pipe, measured its chord height (mm), that is, the value of the local curvature, the unit is mm / m, expressed as 2.5mm / m. This method is also applicable to the pipe end curvature.
2. The total length of curvature: a thin rope, from the ends of the pipe tension, measuring the maximum chord height at the bend of the steel pipe (mm), and then converted into a length (in meters) of the percentage, that is, the steel pipe length direction of full-length curvature.
For example: the length of the steel pipe is 8m, measured the maximum chord height of 30mm, the pipe should be the full-length bending degree:
0.03÷8m×100%=0.375%

Dimensional exceedance
Dimensional deviation or dimensional exceedance of the standard allowable deviation. Here the "dimension" mainly refers to the outside diameter and wall thickness of steel pipe. Usually some people are used to call the dimensional deviation "tolerance out", this deviation and tolerance equivalent to the call is not strict, should be called "deviation out". Here the deviation may be "positive", may also be "negative", rarely in the same batch of steel pipe "positive, negative" deviation are out of the phenomenon.