We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from.

API casing and tubing size chart

About Us

We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.

Products

Welded Steel Pipe

Welded steel pipe, also known as welded pipe, is a steel pipe made of steel plate or steel strip after being crimped and welded. Welded steel pipes have simple production process, high production efficiency, many varieties and specifications.Welded steel pipes for low-pressure fluid transportation (API 5L) are also known as general welded pipes, commonly known as black pipes. Welded steel pipe for conveying general lower pressure fluids such as water, gas, air, oil and heating steam and other purposes. Super Steel Manufacturing can offer SAWL/LSAW Steel Pipe, SSAW Steel Pipe, EFW/ERW Steel Pipe in standard size or as customer’s requirement.

Seamless Steel Pipe

Seamless pipe made of a single piece of metal with no seams on the surface is called a seamless steel pipe. According to the production method, the seamless pipe is divided into a hot rolled pipe, a cold rolled pipe, a cold drawn pipe, an extruded pipe, a top pipe, and the like. According to the shape of the section, the seamless steel pipe is divided into two types: a circular shape and an irregular shape, and the shaped pipe has a square shape, an elliptical shape and the like. The maximum diameter is 650mm and the minimum diameter is 0.3mm. Seamless steel pipe is mainly used as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural steel pipe for automobile, tractor and aviation.

ASTM A53 Seamless Pipe

API 5L Seamless Pipe

ASTM A106 Steel Pipe

Boiler steel Tube

Cold Drawn Seamless Pipe

More Details

Stainless Steel Pipe

Stainless steel pipe is used for transporting liquids and gasses in a wide range of industries including mining, oil, natural gas, automotive, and aviation. Super Steel can provide Stainless Seamless Steel Pipe, Stainless Welded Steel Pipe, Stainless Steel Screen Pipe and Stainless Hollow Section in standard sizes, or you can have it custom cut to your specifications.

Stainless Seamless Steel Pipe

Stainless Welded Steel Pipe

More Details

Alloy Steel Pipe

Alloy steel pipe is a kind of seamless steel pipe, its performance is much higher than the general seamless steel pipe, because this steel pipe inside containing Cr, high temperature resistance, low temperature, corrosion-resistant performance of other non-pipe joints not match, so the more extensive use of alloy tube in the petroleum, aerospace, chemical, electric power, boiler, military, and other industries.

Copper-Nickel Pipe/Tube

More Details

OCTG Pipe

Oilfield tubular goods of Surper Steel is a collection of seamless rolled products consisting of Tubing and Casing, Slotted Pipe, Drill Pipe and Drill Collar, Pup Joint and Coupling, which are useful in the oil and gas production activities. These OTCG products are manufactured according to the specifications set by API. OCTG can be either seamless or welded and are available in different sizes and lengths.

API 5CT Pipe

Casing steel pipe

Drill Pipe And Drill Collar

Pup Joint

Slotted Pipe

More Details

Hollow Section

A hollow structural section (HSS) is a type of metal profile with a hollow cross section. The steel hollow section is made up of various material welded structural hollow sections for multiple purposes. No matter building construction, or spare parts manufacturing, even working parts construction. It is also used in these projects. Here are products Mild Steel Square Tube, Mild Steel Rectangular Tube, Stainless Steel Square Tube, Stainless Steel Rectangular Tube.

Circular Hollow Sections

Rectangular Tube

Square steel tube

More Details

Coated Steel Pipe

Coated steel pipe means the pipe that is by the processing after the corrosion, which can effectively prevent or slow the steel pipe occurs in the course of transport and chemical or electrochemical reaction corrosion phenomena. Coated steel pipe can effectively prevent or slow down the corrosion of steel pipes to extend service life and reduce operating costs pipe. Super Steel Manufacturing is a supplier that can offer Galvanized Steel Pipe, FBE Coated Pipe, Epoxy Coated Pipe, 3LPE/3PE Coated Pipe.

3PE Steel Pipe

Epoxy Coating Pipe

FBE Coating Pipe

Galvanized Steel Pipe

More Details

Finned Steel Tube

Fin tubes are a type of heat exchanger that is used in many different industries. These tubes have a finned surface, which increases their surface area and allows them to transfer heat more efficiently. This makes them ideal for applications where high heat transfer rates are required, such as in power plants and refrigeration systems. Fin tubes are made from a variety of materials, including copper, aluminum, and stainless steel. They are available in a range of sizes and shapes and can be customized to meet the specific needs of each application.

Finned Steel Tube

Studded Tube

More Details

Pipe Fittings

Pipe Fittings are defined as the piping components that help in pipe routing for directional changes, size changes, and branch connections. Super Steel is one of the top supplier of Flange, Elbow / Reducer / Tee / Cap / Bend and Valves, which are widely used in both the piping and plumbing industries.

Steel Plate & Beam

Steel plates normally stand for steel plates 6mm or thicker and are made by hot-rolling a semiproduct slab 200mm or thicker and then through follow-up processes such as cooling or heat treatment. Steel plates ramify into products for general structure, welding, boiler or large-diameter steel pipes depending on material. Super Steel Manufacturing can offer Alloy Steel Plate, Carbon Steel Plate, Nickel Alloy Sheet/Plate, Stainless Steel Plate,C Channel, H/I Beam,Steel Bar.

Workshop

High quality piping products from approved manufacturers.
In order to continuously improve our offerings to our clients, we have consistently improved and upgraded our manufacturing facility and can hence offer material with stringent requirements.

Projects

Over the years, Super Steel Manufacturing Co.,Ltd(SMC) has developed an enviable reputation for project management for the Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical and other heavy industries.
The many years of experience that we have means that there is always someone who has the ability to carry a project forward.

Services

Super Steel Manufacturing Co.,Ltd(SMC) adheres to the principle of being customer-oriented, focusing on customers and meeting their requirements. We respond quickly and customize products and solutions for end users.

News

Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.

Product News

API casing and tubing size chart

Date:2025-03-04

In the oil and gas industry, selecting the right casing and tubing is crucial for ensuring well integrity and efficient production. API (American Petroleum Institute) casing and tubing are manufactured according to strict industry standards, covering a wide range of sizes, grades, and specifications to meet different operational needs. Whether you are designing a new well or replacing existing pipes, understanding the API casing and tubing size chart is essential for making informed decisions.

Super Steel Manufacturing Co.,Ltd is professional API 5CT casing and tubing manufacturer, for more details, please contact:sales@super-steels.com

- API Tubing Size Chart

O. D.

Weight

W. T.

End Processing

Non-upset coupling-thread

Upset coupling-thread

Steel Grade

Inch

lb./ft.

Inch

H40

J55

L80

N80

C90

T95

P110

2 3/8

2.375

60.32

–

0.167

4.24

–

4.6

4.7

0.19

4.83

PNU

5.8

5.95

0.254

6.45

–

PNU

6.6

–

0.295

7.49

–

7.35

7.45

0.336

8.53

–

2 7/8

2.875

73.02

6.4

6.5

0.217

5.51

PNU

–

7.8

7.9

0.276

7.01

–

8.6

8.7

0.308

7.82

–

PLB

PLBE

–

PLB

9.35

9.45

0.34

8.64

–

PLB

PLBE

–

PLB

10.5

–

0.392

9.96

–

PLB

–

PLB

11.5

–

0.44

11.18

–

PLB

–

3 1/2

3.5

88.9

7.7

–

0.216

5.49

–

9.2

9.3

0.254

6.45

PNU

10.2

–

0.289

7.34

–

12.7

12.95

0.375

9.52

–

PNU

14.3

–

0.43

10.92

–

15.5

–

0.476

12.09

–

0.53

13.46

–

101.6

9.5

–

0.226

5.74

–

0.262

6.65

–

13.2

–

0.33

8.38

–

16.1

–

0.415

10.54

–

18.9

–

0.5

12.7

–

22.2

–

0.61

15.49

–

4 1/2

4.5

114.3

12.6

12.75

0.271

6.88

PNU

–

15.2

–

0.337

8.56

–

0.38

9.65

–

18.9

–

0.43

10.92

–

PLB

21.5

–

0.5

12.7

–

PLB

23.7

–

0.56

14.22

–

PLB

26.1

–

0.63

–

PLB

P——Plain；N—— Non-upset coupling-thread；U—— Upset coupling-thread； L——Integral

- API Casing Size Table

DN	O. D.		Weight		W. T.			End Machining Form
	O. D.		Weight		W. T.			Steel Grade
	Inch	mm	lb/ft	kg/m	Inch	mm	H40	J55	L80	N80	C90	P110
	Inch	mm	lb/ft	kg/m	Inch	mm	H40	K55	L80	N80	T95	P110
4 1/2	4.5	114.3	9.5	14.14	0.205	5.21	PS	PS	–	–	–	–
			10.5	15.63	0.224	5.69	–	PSB	–	–	–	–
			11.6	17.26	0.25	6.35	–	PSLB	PLB	PLB	PLB	PLB
			13.5	20.09	0.29	7.37	–	–	PLB	PLB	PLB	PLB
			15.1	22.47	0.337	9.56	–	–	–	–	–	PLB
5	5	127	11.5	17.11	0.22	5.59	–	PS	–	–	–	–
			13	19.35	0.253	6.43	–	PSLB	–	–	–	–
			15	22.32	0.296	7.52	–	PSLB	PLB	PLB	PLBE	PLB
			18	26.79	0.362	9.19	–	–	PLB	PLB	PLBE	PLB
			21.4	31.85	0.437	11.1	–	–	PLB	PLB	PLB	PLB
			23.2	34.53	0.478	12.14	–	–	–	–	PLB	–
			24.1	35.86	0.5	12.7	–	–	–	–	PLB	–
5 1/2	5.5	139.7	14	20.83	0.244	6.2	PS	PS	–	–	–	–
			15.5	23.07	0.275	6.98	–	PSLB	–	–	–	–
			17	25.3	0.304	7.72	–	PSLB	PLB	PLB	PLBE	PLB
			20	29.76	0.361	9.17	–	–	PLB	PLB	PLBE	PLB
			23	34.23	0.415	10.54	–	–	PLB	PLB	PLBE	PLB
			26.8	39.88	0.5	12.7	–	–	–	–	–	–
			29.7	44.2	0.562	14.27	–	–	–	–	–	–
			32.6	48.51	0.625	15.88	–	–	–	–	–	–
			35.3	52.53	0.687	17.45	–	–	–	–	–	–
			38	56.55	0.75	19.05	–	–	–	–	–	–
			40.5	60.27	0.812	20.62	–	–	–	–	–	–
			43.1	64.14	0.875	22.22	–	–	–	–	–	–
6 5/8	6.625	168.28	20	29.76	0.288	7.32	PS	PSLB	–	–	–	–
			24	35.72	0.352	8.94	–	PSLB	PLB	PLB	PLBE	PLB
			28	41.67	0.417	10.59	–	–	PLB	PLB	PLBE	PLB
			32	47.62	0.475	12.06	–	–	PLB	PLB	PLBE	PLB
7	7	177.8	17	25.3	0.231	5.87	PS	–	–	–	–	–
			20	29.76	0.272	6.91	PS	PS	–	–	–	–
			23	34.23	0.317	8.05	–	PSLB	PLB	PLB	PLBE	–
			26	38.69	0.362	9.19	–	PSLB	PLB	PLB	PLBE	PLB
			29	43.16	0.408	10.36	–	–	PLB	PLB	PLBE	PLB
			32	47.62	0.453	11.51	–	–	PLB	PLB	PLBE	PLB
			35	52.09	0.498	12.65	–	–	PLB	PLB	PLBE	PLB
			38	56.55	0.54	13.72	–	–	PLB	PLB	PLBE	PLB
			42.7	63.54	0.625	15.88	–	–	–	–	–	–
			46.4	69.05	0.687	17.45	–	–	–	–	–	–
			50.1	74.56	0.75	19.05	–	–	–	–	–	–
			53.6	79.77	0.812	20.62	–	–	–	–	–	–
			57.1	84.97	0.875	22.22	–	–	–	–	–	–
7 5/8	7.625	193.68	24	35.72	0.3	7.62	PS	–	–	–	–	–
			26.4	39.29	0.328	8.33	–	PSLB	PLB	PLB	PLBE	PLB
			29.7	44.2	0.375	9.52	–	–	PLB	PLB	PLBE	PLB
			33.7	50.15	0.43	10.92	–	–	PLB	PLB	PLBE	PLB
			39	58.05	0.5	12.7	–	–	PLB	PLB	PLBE	PLB
			42.8	63.69	0.562	14.27	–	–	PLB	PLB	PLB	PLB
			45.3	67.41	0.595	15.11	–	–	PLB	PLB	PLB	PLB
			47.1	70.09	0.625	15.88	–	–	PLB	PLB	PLB	PLB
			51.2	76.19	0.687	17.45	–	–	–	–	–	–
			55.3	80.3	0.75	19.05	–	–	–	–	–	–
8 5/8	8.625	219.08	24	35.72	0.264	6.71	–	PS	–	–	–	–
			28	41.62	0.304	7.72	PS	–	–	–	–	–
			32	47.62	0.352	8.94	PS	PSLB	–	–	–	–
			36	53.57	0.4	10.16	–	PSLB	PLB	PLB	PLBE	PLB
			40	59.53	0.45	11.43	–	–	PLB	PLB	PLBE	PLB
			44	65.48	0.5	12.7	–	–	PLB	PLB	PLBE	PLB
			49	72.92	0.557	14.15	–	–	PLB	PLB	PLBE	PLB
9 5/8	9.625	244.48	32.3	48.07	0.312	7.92	PS	–	–	–	–	–
			36	53.57	0.352	8.94	PS	PSLB	–	–	–	–
			40	59.53	0.395	10.03	–	PSLB	PLB	PLB	PLBE	–
			43.5	64.73	0.435	11.05	–	–	PLB	PLB	PLBE	PLB
			47	69.94	0.472	11.99	–	–	PLB	PLB	PLBE	PLB
			53.5	79.62	0.545	13.84	–	–	PLB	PLB	PLBE	PLB
			58.4	86.91	0.595	15.11	–	–	PLB	PLB	PLB	PLB
			59.4	88.4	0.609	15.47	–	–	–	–	–	–
			64.9	96.58	0.672	17.07	–	–	–	–	–	–
			70.3	104.62	0.734	18.64	–	–	–	–	–	–
			75.6	112.5	0.797	20.24	–	–	–	–	–	–
10 3/4	10.75	273.05	32.75	48.74	0.279	7.09	PS	–	–	–	–	–
			40.5	60.27	0.35	8.89	PS	PSB	–	–	–	–
			15.5	67.71	0.4	10.16	–	PSB	–	–	–	–
			51	75.9	0.45	11.43	–	PSB	PSB	PSB	PSBE	PSB
			55.5	82.59	0.495	12.57	–	–	PSB	PSB	PSBE	PSB
			60.7	90.33	0.545	13.84	–	–	–	–	PSBE	PSB
			65.7	97.77	0.595	15.11	–	–	–	–	PSB	PSB
			73.2	108.93	0.672	17.07	–	–	–	–	–	–
			79.2	117.86	0.734	18.64	–	–	–	–	–	–
			85.3	126.94	0.797	20.24	–	–	–	–	–	–
11 3/4	11.75	298.45	42	62.5	0.333	8.46	PS	–	–	–	–	–
			47	69.94	0.375	20.24	–	–	–	–	–	–
			54	80.36	0.435	8.46	–	–	–	–	–	–
			60	89.29	0.489	9.53	–	–	–	–	–	–
			65	96.73	0.534	11.05	–	–	–	–	–	–
			71	105.66	0.582	14.42	–	–	–	–	–	–
13 3/8	13.375	339.73	48	71.43	0.33	8.38	PS	–	–	–	–	–
			54.5	81.1	0.38	9.65	–	PSB	–	–	–	–
			61	90.78	0.43	10.92	–	PSB	–	–	–	–
			68	101.19	0.48	12.19	–	PSB	PSB	PSB	PSB	PSB
			72	107.15	0.514	13.06	–	–	PSB	PSB	PSB	PSB
16	16	406.4	65	96.73	0.375	9.53	PS	–	–	–	–	–
			75	111.61	0.438	11.13	–	PSB	–	–	–	–
			84	125.01	0.495	12.57	–	PSB	–	–	–	–
			109	162.21	0.656	16.66	–	P	P	P	–	P
18 5/8	18.625	473.08	87.5	130.21	0.435	11.05	PS	PSB	–	–	–	–
20	20	508	94	139.89	0.438	11.13	PSL	PSLB	–	–	–	–
			106.5	158.49	0.5	12.7	–	PSLB	–	–	–	–
			133	197.93	0.635	16.13	–	PSLB	–	–	–	–
P——Plain；S——Short-thread；L——Long-thread；B——Buttress thread；E——Extreme thread