Steel Pipe Sizes & Dimensions For Structural & Pipe Pile

Steel Pipe dimension includes the outer diameter (OD) of the pipes, wall thickness (WT), and the pipe length.

The steel pipe weight will be depending on steel pipe usage. How much pressure does the pipe could bear, the thickness, and the maximum length needed as per project application.

So it’s crucial for any steel pipe manufacturer’s to know before they can provide a more accurate steel pipe prices.

In the North American standard, they use nominal pipe size (NPS). The size represented the approximate inside diameter of the pipe in inches. 

steel pipe dimensions and sizes

Pipe and tubing are not measured the same way. Many people assume pipe size is the outer diameter of the pipe—but “pipe size” actually refers to what is called “nominal diameter.”

What Is The Standard Length of Steel Pipe?

Steel pipes length varies depending on the applications and types of pipe.

The two most common welded steel pipes are the SSAW (Spiral submerged arc welded pipe) and LSAW (Longitudinal submerged arc welded).

We are a direct manufacturer of SSAW steel pipes – our outer diameter sizes range from 273mm – 2700mm. Our maximum length is 50 meters and wall thickness (WT) ranges from 6mm – 22mm.

Is steel pipe measured by Inside Diameter or Outside?

Steel pipe size refers to a nominal (not actual) inside pipe diameter. The schedule refers to the pipe’s wall thickness depending on its usage.

There are two common pipe size standards: the American (ANSI/ASME/API) standard, which is in imperial units, and the European (DIN) system which uses metric units. 

The pipe schedule sets the pipe wall thickness. Obviously increasing the wall thickness of the pipe increases the mechanical strength of the pipe.

The following pipe schedules are available (in order of increasing wall thickness): 

5S, 10S, 10, 20, 30, 40S, STD, 40, XS (Extra Strong), 60, 80, 100, 120, 140, XXS (Double Extra Strong) and 160.

It is worth bearing in mind that wall thicknesses come within a specified tolerance, depending on the engineering standard used.

There is often confusion as to which size die the customer actually needs for their pipe size dimension or tube size dimension. Below is some standard name that often uses for structural and piling pipes.

ASTM A252 Steel Piling Pipe

The ASTM A252 is a standard specification for the welded pipe pile.  

ASTM A252 spiral pipes are used for piling purposes. 

It is commonly used for stabilization to support a deep foundation to bear the heavy load capacity of the building structures or seaport projects, cofferdam construction, marine foundation farther down the earth’s surface.


astm a252 Pipe Sizes

You also want to check:

EN 10219-1 Cold-Formed Structural Hollow Sections

EN 10219-1 is a cold-formed welded structural hollow section that can be used in the construction of greenhouses, railings, and parapets, as well as in construction and structural in general.

Cold-formed welded process in which the main forming is carried out at ambient temperature.

Advantages of cold-formed structural hollow sections (CFSHS) over Hot-finished structural hollow section (HFSHS) products

EN 10219-1 Pipe Sizes

SY/T 5040-2000 Spiral Submerged Arc Welding Pipe for Piling

SY/T 5040-2000 is another standard specification of piling pipes. 

The steel pipe pile is a type of spiral welded steel pipe that is commonly used for different industries from building constructions, excavation, onshore or offshore oil and gas drilling projects.

There is a wide range of foundations suitable for different applications like the condition of the ground, the presence of water, or the nature of the support needed.

SY/T 5040-2000 Spiral Submerged Arc Welding Pipe for Piling

SSAW JIS 15525

The SSAW JIS 15525 is a structural pipe and low-pressure liquid pipe for water, gas and oil, and heating.

SSAW JIS 15525 pipes have greater residual stress than LSAW pipes.

SSAW JIS 15525

Are You Looking For The Right Steel Pipe Supplier?

We understand that finding the right pipe supplier can be tough sometimes…

In fact, this is the most time-consuming work for any steel pipes stockists, distributors, and contractors.

We know that finding suppliers have gotten easier nowadays…with one click you can land to thousands of Steel Pipe Suppliers on the internet. But who you can trust from start to finish?

Zhangzhou Steel Pipes mainly focuses on manufacturing Spiral Submerged Arc Welded (SSAW) pipes with Two Factories for Spiral Pipe Mill and SRM Pipe Mill in Zhangzhou in Fujian Province, China.

SSAW pipe is now adding significant momentum to global growth to support the load of skyscraper projects, excavation, and drilling, supporting any hillside or slope projects, and minimizes mobilization of building structures. 


Zhangzhou Steel Pipe is entirely committed to the best quality steel pipes.

And best value-added service from start to finish.

The world material & service of choice!

We have the ability to provide various diameters and wall thicknesses of SSAW steel pipes to accommodate your spiral welded pipes requirements.

Contact us today with the complete details of your specific needs and we will get back to you within 24-48 hours of business working days. 

Just fill out the “request a quote” form below.

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  1. Pingback: Micropile For Deep Foundation - Zhangzhou Steel Pipes

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