Choosing the wrong tube type costs you time, rework, and money. At Precision Ground Bars, we have supplied both DOM and seamless tube stock from our Palos Hills, Illinois, facility since 1970. Knowing which one fits your application upfront saves you from expensive mistakes down the line.
DOM and seamless tubing look similar on a spec sheet but behave differently under load, pressure, and machining. Your application’s structural demands, fluid contact, and dimensional requirements will point you clearly toward one or the other. We break it down below.
What Sets DOM and Seamless Tubing Apart for Your Application
DOM tubing starts as a welded tube drawn through a mandrel. That drawing process closes the weld and works the entire wall uniformly, giving you a smooth finish, consistent wall thickness, and tight dimensional accuracy. A seamless tube is formed without any weld from the start, making it the right choice where pressure integrity or seam-free construction is required.
Understanding which process produces the properties your application needs is the first decision to make. Get that right and everything downstream, from machining to assembly fit-up, becomes predictable and repeatable. We stock both types and can grind, cut, and package either to your specification.
DOM Tubing: Built for Structural and Mechanical Work
DOM tubing delivers the dimensional accuracy and surface consistency that structural and mechanical applications depend on. Roll cages, chassis components, engine mounts, hydraulic cylinders, bearings, and shafts are all common uses. Construction applications include augers, crane boom lacings, and structural columns, where consistent wall thickness affects joint fit-up directly.
On the industrial side, conveyor belts, hoists, and cranes rely on DOM for its strength and durability under load. Even sporting goods like hockey sticks, golf clubs, and fishing rods use it for its smooth finish and controlled weight. If your application is structural or mechanical and a seam-free spec is not required, DOM is the practical, reliable choice.
Seamless Tubing: The Right Call for Pressure and Regulated Environments
Seamless tube carries no weld at any stage of production. That matters in food processing, medical implants, oil and gas, chemical and petrochemical, pharmaceutical, and power generation applications, where a seam-free construction is either required or strongly preferred. Internal pressure cycling and aggressive fluid contact are where Seamless earns its place.
Our stainless steel round tube inventory covers austenitic grades from 304 to 316L in both seamless and welded options. Sizes run from 1/16 inch to 12 inches. Finish options include pickled and annealed, mill finish, polished, and bright annealed. Custom cut sizes are available for both forms to match your exact production requirements.
Tube Grinding and Finishing Services We Offer
Raw tube stock does not always arrive at the surface finish or dimensional spec your process requires. Our tube grinding service uses centerless grinding to bring straight tubes, irregular shapes, and bent tubing to your required dimensions. Thin-wall parts get specialized machining methods to meet their specific tolerance requirements without compromising the wall.
We also cut tubes to exact customer specifications through our bar stock cutting service. Our custom packaging service protects every order during transport so your material arrives in the same condition it left our facility. Both services are available alongside our full range of precision grinding operations.
Get the Right Tube Stock for Your Next Project
Talk to our team Monday through Friday, 8 AM to 5 PM. Call us at (800) 818-0822 or (708) 880-7277 and tell us what your application requires. We will help you identify the right tube type, grade, size, and finish from our inventory.
Ready to move forward? Submit your specifications through our Submit a Quote form at precisiongroundbars.com. Include your tube type, grade, size, finish, and any grinding or cutting requirements, and we will take it from there.
FAQs
Is the weld seam in DOM tubing a structural weakness?
The mandrel drawing process closes and works the seam uniformly. For structural and mechanical applications like roll cages and hydraulic cylinders, DOM performs with the strength those applications need.
What grades and sizes do you carry for stainless steel round tube?
We stock austenitic grades from 304 to 316L in seamless and welded forms. Sizes run from 1/16 inch to 12 inches with multiple finish options available.
Can you grind the tube after delivery to hit a tighter spec?
Yes. Our tube grinding service handles straight tubes, irregular shapes, and bent tubing. Thin-wall parts get specialized machining methods to meet their tolerance requirements.
Which industries do you supply tube stock to?
We supply automotive, construction, hydraulic cylinder, food processing, medical, marine, oil and gas, pharmaceutical, and power generation manufacturers.
