Seamless Steel Pipe Sizes and Weights

Hunan Standard Steel Co.,Ltd offers standard size seamless steel pipes primarily used in the oil and gas industry, automotive and engineering industries. This is the most common and widely used product and comes in different sizes and thicknesses. 

Seamless steel pipe sizes in mm:

Out diameter: 1/2 inch - 36 inch (21.3mm-914.4mm)
Thickness: 2.11mm-60mm ( SCH10, SCH20, SCH40, SCH80, STD, SCH120, SCH160, XXS)

General size table for Seamless steel pipes and Welded pipes in mm: 

Carbon seamless Steel Pipe & Tube Sizes and Weights:

Seamless Steel Pipe Sizes	Seamless Steel Pipe Schedule (INCH)
INCH	5S	5	10S	10	20	30	40	STD	60	80	100	120	140	160
1/8		0.035	0.049	0.049			0.068	0.068		0.095
1/4		0.049	0.065	0.065			0.2447	0.2447		0.3145
3/8		0.048	0.065	0.065			0.091	0.091		0.126
1/2	0.065	0.065	0.083	0.083			0.109	0.109		0.147				0.187
3/4	0.065	0.065	0.083	0.083			0.113	0.113		0.154				0.218
1	0.065	0.065	0.109	0.109			0.133	0.133		0.179				0.250
1 1/4	0.065	0.065	0.109	0.109			0.140	0.140		0.191				0.250
1 1/2	0.065	0.065	0.109	0.109			0.145	0.145		0.200				0.281
2	0.065	0.065	0.109	0.109			0.154	0.154		0.218				0.344
2 1/2	0.083	0.083	0.120	0.120			0.203	0.203		0.276				0.375
3	0.083	0.083	0.120	0.120			0.216	0.216		0.300				14.32
3 1/2	0.083	0.083	0.120	0.120			0.226	0.226		0.318
4	0.083	0.083	0.120	0.120			0.237	0.237		0.337		0.438		0.531
4 1/2								0.247
5	0.109	0.109	0.134	0.134			0.258	0.258		0.375		0.500		0.625
6	0.109	0.109	0.134	0.134			0.280	0.280		0.432		0.562		0.719
7								0.301
8	0.109	0.109	0.148	0.148	0.250	0.277	0.322	0.322		0.500	0.594	0.719	0.812	0.916
9
10	0.134	0.134	0.165	0.165	0.250	0.307	0.365	0.365		0.594	0.719	0.844	1.000	1.125
11
12	0.156	0.156	0.180	0.180	0.250	0.330	0.406	0.375	0.562	0.688	0.844	1.000	1.125	1.312
14	0.156		0.188	0.250	0.312	0.375	0.437	0.375	0.594	0.750	0.938	1.094	1.250	1.406
16	0.165		0.188	0.250	0.312	0.375	0.500	0.375	0.656	0.844	0.1031	1.219	1.438	1.593
18	0.165		0.188	0.250	0.312	0.437	0.562	0.375	0.750	0.938	1.156	1.375	1.562	1.781
20	0.188		0.218	0.250	0.375	0.500	0.594	0.375	0.812	1.031	1.281	1.500	1.750	1.968
22				0.250	0.375	0.500		0.375	0.875	1.125	1.357	1.625	1.875	2.215
24	0.218		0.250	0.250	0.375	0.562	0.687	0.375	0.969	1.219	1.531	1.812	2.062	2.343
30				0.312

Common ASTM standards for seamless pipes include the following:

ASTM A53/A53M: This is a standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded and seamless, used for general purposes, including galvanized and ungalvanized steel pipes.
ASTM A106/A106M: This is a standard specification for seamless carbon steel pipe for high-temperature or pressure service, typically used for applications above 350°C.
ASTM A312/A312M: This is a standard specification for seamless and welded austenitic stainless steel pipes, suitable for heavily cold-worked austenitic stainless steel tubes.
ASTM A269: This is a standard specification for seamless and welded austenitic stainless steel tubes for general corrosion-resistant and low- or high-temperature service applications.

ASTM A500/A500M: This is a standard specification for cold-formed welded and seamless carbon steel round, square, rectangular, or special shape structural tubes, used for welded, riveted, or bolted structures of bridges and buildings.
ASTM A209: This is a standard specification for seamless carbon steel and alloy steel tubes for use in boiler and superheater applications, suitable for high-temperature and pressure services.
ASTM A213/A213M: This is a standard specification for seamless ferritic and austenitic alloy steel tubes for boiler, superheater, and heat exchanger applications.
ASTM A335/A335M: This is a standard specification for seamless ferritic and austenitic alloy steel tubes for high-temperature service.

Read more: Schedule 40 vs Schedule 80 Pipe