Tubing Pipe Size Chart: Dimensions, Weights and Specifications

Tubing pipe is an essential component of oil and gas well completion systems. It provides a flow path for transporting oil, natural gas and other fluids between the producing formation and the surface. Selecting the correct tubing requires careful consideration of outside diameter, wall thickness, nominal weight, steel grade and connection type.
This tubing pipe size chart covers common API 5CT tubing dimensions, nominal linear weights, wall thicknesses and material grades. It also explains how to compare tubing specifications, select suitable connections and prepare an accurate purchase inquiry.
Whether you are comparing tubing sizes for a new well or sourcing replacement pipe, use the tables below as a starting point and verify the final specifications against the applicable standard and project requirements.

Common sizes and specifications of OCTG tubing pipe

The following table lists the sizes and specifications of common OCTG casing and tubing:Tubing pipes are available in different sizes and wall thicknesses to accommodate different well designs and operating conditions.

The outside diameter determines the space occupied by the tubing, while wall thickness affects the internal diameter and mechanical performance.

Steel Tubing Pipe Sizes and Weight Chart

Technical note: This is a representative selection, not a complete tubing specification table.

Nominal weights can depend on the connection and end-finish configuration.

Confirm the exact combination of size, wall thickness, nominal linear mass, grade and connection against the applicable API 5CT edition before using the table for procurement.

How to Read a Tubing Pipe Size Chart ？

A tubing size chart typically includes the following parameters:
Nominal size: The standard designation used to identify the tubing size.
Outside diameter (OD): The external diameter of the pipe body.
Wall thickness: The thickness of the pipe wall, which affects the internal diameter.
Nominal linear weight: The reference mass per unit length, usually expressed in pounds per foot or kilograms per metre.
Connection type: The end-finish configuration used to connect individual tubing joints.
For example, 2-3/8-inch tubing has an outside diameter of 2.375 inches, approximately 60.33 mm. Its wall thickness and nominal weight may vary depending on the selected configuration.
When comparing supplier quotations, always compare the same outside diameter, wall thickness, grade and connection type.

Common standards and specifications for OCTG  tubing pipe

Standard	API 5L, API 5CT, ASTM A106/A53, ASTM A519, JIS G 3441, JIS G3444, JIS G3445 DIN 2391, EN10305, EN10210, ASME SA106, SA192, SA210,SA213, SA335, DIN17175, ASTM A179
Our diameter	1/8 – 30 inch (10.3-762mm)
Wall Thickness	0.049” – 2.5” (1.24- 63.5mm)
Length	Random Length, Fixed Length, SRL, DRL
Steel Grade	API 5L: GR B, X42, X46, X56, X60, X65, X70
	ASTM A53/A106: GR A, GR B, GR C
	ASME SA106: GR.A, GR.B, GR.C
	ASME SA192: SA192
	ASME SA209M: T1, T1a
	ASME SA210: GR.A-1, GR.C
	ASME SA213: T2, T5, T9, T11, T12, T22
	ASME SA335: P2, P5, P9, P11, P12, P22, P91
	DIN17175:ST35.8, ST45.8, 15Mo3, 13CrMo44
Surface	Fusion Bond Epoxy Coating,Coal Tar Epoxy,3PE,FBE,Varnish coating,Bitumen coating,Black Oil coating as per customers requirement
Treatment	Heat treatment:Annealed: Bright annealed,Spheroidize annealed, Normalized, Stress relieved, Cold finished, Quenched and Tempered.
Application	Applicable to the general structure, mechanical structure, water wall panel, economizer, super heater, boiler and heat exchanger,with seamless steel tubes, and to transport liquid, gas, oil etc.

API 5CT OCTG Tubing Pipe Grades

Mechanical Properties
Group	Grade	Type	Total	Yield Strength (Mpa)		Tensile	Hardness max
			%	min.	max.	MPa	HRC	HBW
1	H40	—	0.5	276	552	414	—	—
	J55	—	0.5	379	552	517	—	—
	K55	—	0.5	379	552	655	—	—
	N80	1	0.5	552	758	689	—	—
	N80	Q	0.5	552	758	689	—	—
	R95	—	0.5	655	758	724	—	—
2	M65	—	0.5	445	586	586	22	235
	L80	1	0.5	552	655	655	23	241
	L80	9Cr	0.5	552	655	655	23	241
	L81	13Cr	0.5	552	655	655	23	241
	C90	1	0.5	621	724	689	25.4	255
	T95	1	0.5	655	758	724	25.4	255
	C110	—	0.7	758	828	793	30	286
3	P110	—	0.6	758	965	862	—	—
4	Q125	1	0.65	862	1034	931	—	—
a. In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method.
b. No hardness limits, but the maximum variation is controlled by manufacturer acc API 5CT.

Standard and Grades: API 5CT J55 / K55, N80-1, N80Q, C90, T95, P110, Q125 and 13Cr
Casing Pipe Size range: 5 1/2 “to 20” Length usually in R3.
Tubing Pipe dimensions range: 1.0 “, 1.315”, 1.66 “, 1.9”, 2.063 “, 2 3/8”, 3 1/2 “and 4 1 /2”, Length in R2.
Type of connections for Casing: BTC (thread coupling buttress), LTC (long round thread coupling), premium connection.
Types of connections for Tubing: BTC, NUE, EUE, Premium

Tubing Pipe Dimensions: OD, ID and Wall Thickness

Understanding the relationship between outside diameter, inside diameter and wall thickness is essential when selecting tubing for an oil or gas well.

Outside Diameter (OD)
Outside diameter determines the space required for installing the tubing inside the casing or completion equipment. It is an important compatibility parameter when checking tubing hangers, packers and other downhole components.

Inside Diameter (ID)
Inside diameter determines the available internal flow area. It affects fluid velocity and contributes to pressure losses during production or injection.

Wall Thickness
Wall thickness is the distance between the inner and outer surfaces of the pipe wall.

A thicker wall generally reduces the internal diameter for a fixed outside diameter, but tubing performance must also be evaluated against material properties, manufacturing tolerances and the actual load conditions.
For plain pipe body dimensions, the nominal inside diameter can be estimated using:
Inside diameter = Outside diameter − 2 × Wall thickness
For example, if tubing has an outside diameter of 60.33 mm and a nominal wall thickness of 4.83 mm:

ID = 60.33 − (2 × 4.83) = 50.67 mm
This is a nominal geometric calculation. Actual internal dimensions and usable clearance must be checked against the applicable tolerances, drift requirements and connection geometry.

Main types and applications of OCTG pipes

1. Drill pipe: used to transmit power, rotate the drill bit and circulate drilling fluid during drilling. Drill pipe needs to withstand axial tension, high torque and internal pressure.
2. Casing pipe: Provide structural support in the borehole, prevent wellbore collapse, and isolate different formations. Casing usually uses large diameter pipes, meets standards such as API 5CT, and has different steel grades and thread types.

3. Tubing pipe: Used to transport oil or natural gas from the formation to the ground. Tubing needs to withstand the pressure during production and resist loads and deformation.

Common tubing specifications also meet API 5CT standards and have a variety of diameters and connection types

FAQ

What are the common tubing pipe sizes?
Common sizes include 1.050, 1.315, 1.660, 1.900, 2-3/8, 2-7/8, 3-1/2, 4 and 4-1/2 inches. Available wall thicknesses, weights, grades and connections should be confirmed against the applicable standard and manufacturer data.

What is the outside diameter of 2-3/8-inch tubing?
The nominal outside diameter of 2-3/8-inch tubing is 2.375 inches, approximately 60.33 mm. The wall thickness and internal diameter depend on the selected tubing configuration.

How do you calculate tubing pipe inside diameter?
For a plain pipe body, the nominal inside diameter can be estimated by subtracting twice the wall thickness from the outside diameter. Actual dimensions and usable clearance must be checked against the applicable dimensional tolerances and drift requirements.

What is the difference between tubing and casing?
Tubing transports production or injection fluids inside the completed well. Casing supports the wellbore and helps isolate formations. The two products have different functions and should be selected using their respective specifications.

Which API 5CT tubing grade is best?
There is no single best grade for every well. J55, K55, N80, L80 and P110 have different mechanical and service requirements. The appropriate grade depends on the well design, pressure, temperature, fluid chemistry, corrosion risks and applicable specification.

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