Seamless Steel Pipe
Carbon steel pipe with no weld seam, for pressure, steam, and mechanical work. We stock seamless pipe in A106, A53 Type S, and API 5L, cut and prepped to your spec.
Seamless pipe, no weld line to worry about
Seamless steel pipe starts life as a solid round billet. The billet is heated, pierced through the centre by a rotary piercing mill, then rolled and drawn out until it reaches the diameter and wall thickness called for. Because nothing is rolled and welded shut, the finished pipe has no longitudinal seam anywhere along its length.
That matters when a line runs hot, sits under pressure, or gets bent and machined after it leaves the yard. With a uniform wall and no weld to qualify or inspect, seamless is what most engineers write into the spec for boiler, refinery, hydraulic, and high-pressure process work.
We keep seamless pipe on hand at our Montreal yard in a range of diameters and schedules, both new and prime surplus. Looking for a broader selection instead? Browse our steel pipe for sale in Montreal, or see piling pipe and pile tubes if your project is foundation work.
Seamless pipe grades we supply
Send us the callout on your drawing. These are the specifications we handle most often.
ASTM A106 Grade B
The workhorse for high-temperature service. Seamless carbon steel pipe used in steam, boiler, and refinery lines. Grades A and C available on request.
ASTM A53 Type S
Seamless pipe for general mechanical and pressure use, in Grade A and Grade B. Common in plumbing, compressed air, and structural runs.
API 5L
Line pipe for oil, gas, and water transmission. Available seamless in Grade B and higher strength X grades.
ASTM A333
Low-temperature service pipe, most often Grade 6, where the line has to stay tough in cold Quebec conditions.
ASTM A519 Mechanical Tubing
Seamless carbon and alloy mechanical tubing for cylinders, machined parts, and rolling stock.
Surplus & Used Seamless
Prime surplus and quality used seamless pipe, graded and sorted, at a fraction of mill pricing.
Seamless pipe compared to welded pipe
Welded pipe made today is good product, and plenty of jobs run on it. Here is how the two differ so you can tell which one your job actually needs.
| Seamless Pipe | Welded Pipe (ERW / Spiral) | |
|---|---|---|
| How it is made | Solid billet pierced and rolled out | Flat coil or plate formed and welded closed |
| Weld seam | None | One longitudinal or spiral seam |
| Wall uniformity | Very consistent around the circumference | Consistent, with a heat-affected zone at the seam |
| Typical pressure use | Preferred for high pressure and high heat | Widely used at low to moderate pressure |
| Large diameters | Generally up to about 24 inches | Practical well past 24 inches |
| Relative cost | Higher per foot | Lower per foot |
| Common callouts | A106 Grade B, A53 Type S, API 5L | A53 Type E, API 5L welded, A252 for piling |
Not sure which one the spec allows? Send us the drawing and we will tell you what we have that matches. Get in touch.
Common seamless pipe sizes and wall thicknesses
Wall thickness in inches by schedule, per ASME B36.10. We stock well beyond what is listed here, so ask about your size.
| NPS | OD | SCH 40 | SCH 80 | SCH 160 | XXS |
|---|---|---|---|---|---|
| 2" | 2.375" | 0.154" | 0.218" | 0.344" | 0.436" |
| 3" | 3.500" | 0.216" | 0.300" | 0.438" | 0.600" |
| 4" | 4.500" | 0.237" | 0.337" | 0.531" | 0.674" |
| 6" | 6.625" | 0.280" | 0.432" | 0.719" | 0.864" |
| 8" | 8.625" | 0.322" | 0.500" | 0.906" | 0.875" |
| 10" | 10.750" | 0.365" | 0.594" | 1.125" | 1.000" |
| 12" | 12.750" | 0.406" | 0.688" | 1.312" | 1.000" |
Need a wall thickness or diameter that is not on this chart? Call 514-947-8423 or send us your spec.
Where seamless pipe earns its keep
Anywhere a seam would be a liability, or a line has to be inspected, bent, or machined after installation, seamless is usually the call:
- Steam & boiler lines
- Refinery & process piping
- Hydraulic & pneumatic systems
- Oil & gas transmission
- Heat exchangers
- Machined & bored components
- Cold weather service lines
- Structural & mechanical builds
We prep it before it leaves the yard
Our crew handles the cutting and end prep so your pipe shows up ready to fit, not ready to rework.
Buy seamless pipe in Montreal and across Quebec
Pick up at the yard on Jean-Talon O or have it delivered. We move pipe regularly to customers in:
- Montreal (all boroughs)
- Saint-Laurent
- Laval
- Longueuil
- South Shore (Rive-Sud)
- North Shore (Rive-Nord)
- West Island
- Town of Mount Royal
- Dorval & Lachine
- Across Quebec & Eastern Canada
Looking for seamless steel pipe?
Give us the grade, diameter, schedule, and footage. We will check what is on the ground and price it out for you.
Seamless steel pipe questions
What is seamless steel pipe?
Seamless steel pipe is pipe formed from a solid steel billet that is pierced and rolled out to size, so it has no welded seam running along its length. The wall is uniform all the way around, which is why it is specified for pressure, high temperature, and mechanical service.
How is seamless pipe manufactured?
A round billet is heated and pushed over a piercing point in a rotary piercing mill, which opens a hole through the centre. The hollow shell is then elongated and reduced on a mandrel or plug mill until it hits the required outside diameter and wall thickness, and it is finished either hot or cold drawn.
Is seamless pipe stronger than welded pipe?
Seamless has no weld seam, so there is no heat-affected zone to test or qualify, and it handles high pressure and high heat well. Modern ERW pipe is strong and code-approved for a great many uses, so the real answer comes down to the pressure rating, the governing spec, and your budget. Send us the spec and we will tell you what fits.
What is ASTM A106 Grade B pipe?
ASTM A106 covers seamless carbon steel pipe for high-temperature service. Grade B is the most widely used of the three grades and shows up constantly in steam, boiler, and refinery piping. Grades A and C are available when a job calls for them.
What is the difference between A53 and A106?
A53 covers pipe for general mechanical and pressure use and comes seamless (Type S) or welded (Type E and F). A106 is seamless only and is written for high-temperature service, with tighter chemistry and mechanical requirements. Some pipe is dual certified to both.
What sizes and schedules do you carry?
We stock seamless pipe from small bore up to roughly 24 inches, in schedules from SCH 40 through SCH 80, SCH 160, and XXS. Check our pipe chart for dimensions, then send us your list and we will confirm what is in the yard.
Do you sell surplus and used seamless pipe?
Yes. A large share of our stock is prime surplus and quality used pipe, sorted and graded, which usually lands well under mill pricing. We supply new seamless pipe as well when the job calls for it.
Where can I buy seamless steel pipe in Montreal?
Stealth Pipe and Steel sells seamless steel pipe from our yard at 4058 Jean-Talon O, Suite 200, Montreal, QC H4P 1V5. Pick up locally or have it delivered across Quebec and Eastern Canada. Call 514-947-8423 or request a quote.
Get your seamless pipe quoted today
Tell us the grade, outside diameter, schedule, and how much you need. We will check the yard, quote it quickly, and have it cut and ready for pickup or delivery. Free consultation, no pressure.
Montreal, QC H4P 1V5