ASTM A53 Seamless Pipe Manufacturer & Supplier

Looking for a dependable ASTM A53 Seamless Pipe right here in the States? You've found it. USA Piping Solution is your go-to source for this workhorse carbon steel pipe, perfect for all sorts of mechanical and pressure jobs. We keep a serious stock on hand, ready to ship fast, so you get the certified A53 seamless you need, when you need it. Count on us for good prices, solid advice, and a pipe that gets the job done.

So, What Exactly is ASTM A53 Seamless Pipe?

Let's break down the ASTM A53 Seamless Pipe. Think of it as a standard, reliable carbon steel pipe you'll see used everywhere for mechanical tasks and moderate-pressure systems. The official spec is ASTM A53 (or ASME SA53), and it covers pipes meant for everyday things like carrying steam, water, gas, or air. It's made to be easy to weld and can handle common shop work like bending and flanging (though there are a few nuances depending on the type). Now, ASTM A53 covers a few different manufacturing methods:

• Type S: That's Seamless – the star of this page. Made from a solid steel bar, so no weld seam.
• Type E: Electric-Resistance Welded (ERW).
• Type F: Furnace-Butt Welded (less common these days, Grade A only).

Our focus here is Type S (Seamless). Because it starts as one solid piece, it offers really consistent strength all the way around. No weld means one less thing to worry about, which is why many folks prefer it for pressure applications that fall under the A53 umbrella.

It's a super common Seamless Carbon Steel Pipe, valued for getting the job done reliably without breaking the bank. Just remember, it's not the same as A106 pipe, which is built specifically for high heat. A53 is your general-purpose choice for more moderate conditions.

Where might you use it?

• Standard plumbing jobs (water, air, gas lines)
• Building structures (rails, posts, supports)
• Machine parts and frames
• Basic industrial piping setups
• Electrical conduit

Nailing Down the ASTM A53 Seamless Pipe Specifications

Getting the specs right is step one. We make sure the ASTM A53 Seamless Pipe you get from USA Piping Solution matches the book, ensuring it works reliably and safely.

The Technical Lowdown

Category	Details
The Rulebook	ASTM A53 / ASME SA53
How It's Made	Type S (Seamless)
Strength Levels	Grade A or Grade B (Grade B is tougher and more common)
Manufacturing Route	Seamless – Hot Finished or Cold Drawn (depends on size/order)
Pipe Sizes (NPS)	1/8” up to 26”
Wall Thickness	Schedules 10–160, STD, XH, XXH
End Finishes	PE: Plain Ends for socket welds/mechanical BE: Beveled Ends for butt-welding TE: Threaded Ends with couplings (usually for 4"+)
Length Options	SRL: 16–22 ft DRL: Avg ~35 ft Custom: Cut-to-length
Dimensions Standard	ASME B36.10M
Tolerances	OD: ±1/64” (≤1½”), ±1% (≥2”) Wall Thickness: Max 12.5% under nominal Weight: ±10%

Under the Hood: Chemicals and Strength

What gives ASTM A53 Seamless Pipe its character? It's all about the specific blend of elements in the steel and its tested strength. This combo dictates how it handles pressure, how easy it is to work with, and where it fits best.

The Chemical Recipe (% by Weight)

This mix impacts strength, weldability, and general durability. For Type S (Seamless), here's what's inside:

Element	Grade A (Max %)	Grade B (Max %)	Why It Matters
Carbon (C)	0.25	0.30*	More carbon = more strength, generally.
Manganese (Mn)	0.95	1.20*	Boosts strength and toughness, helps clean the steel during making.
Phosphorus (P)	0.05	0.05	Keep this low – too much makes welding tricky and hurts toughness.
Sulfur (S)	0.045	0.045	Also kept low for good welds and to avoid brittleness.
Copper (Cu)	0.40	0.40	Just tracking residual amounts.
Nickel (Ni)	0.40	0.40	Residual limits.
Chromium (Cr)	0.40	0.40	Residual limits.
Molybdenum (Mo)	0.15	0.15	Residual limits.
Vanadium (V)	0.08	0.08	Residual limits.

*Heads-up on Grade B: If the Carbon is lower than 0.30%, you can have a bit more Manganese (up to 1.65% total Mn). It's a trade-off allowed by ASTM A53, but not by ASME SA53.

How Strong Is It? (Minimum Mechanical Properties)

These numbers show how much force the pipe can take before it permanently bends (yield) or breaks (tensile).

Property	Grade A (Min)	Grade B (Min)	Plain English Meaning
Tensile Strength	48,000 psi (330 MPa)	60,000 psi (415 MPa)	The absolute maximum pull it can handle before snapping.
Yield Strength	30,000 psi (205 MPa)	35,000 psi (240 MPa)	The point where it starts to stretch and won't fully spring back.
Elongation	Varies (Check A53*)	Varies (Check A53*)	How much it can stretch before breaking – shows how ductile it is.

* The exact stretch % required depends on the test sample. The standard has the details.

Tests We Make Sure Are Done (for Seamless):

• Tensile Test: Pulling a sample until it breaks to measure the strengths above.
• Bending Test: For smaller pipes (NPS 2 & under), bending it sharply to make sure it doesn't crack.
• Flattening Test: Squashing a piece of larger pipe (NPS 2+) flat to check for cracks. Shows toughness.

Hydrostatic Test: Filling every pipe with water under pressure to prove it doesn't leak.

Getting to Know A53 Pipe Types and Grades

While we're focusing on seamless, it helps to know the whole A53 family. The standard covers a few variations:

• Type S (Seamless):
• No weld seam – made from a solid bar.
• Often preferred for pressure within A53's limits.
• Comes in Grade A and Grade B.
• Type E (Electric-Resistance Welded - ERW):
• Made from steel strip, seam welded electrically.
• Grade B requires the weld to be heat-treated.
• Comes in Grade A and Grade B.
• Type F (Furnace-Butt Welded):
• Uses heat and pressure to join the edges of the steel strip.
• Definitely not meant for flanging.
• Only comes in Grade A.

Grade A vs. Grade B - What's the Difference?

It really boils down to strength:

• Grade A: Has less carbon and manganese, so it's not quite as strong (30 ksi yield, 48 ksi tensile). Might be a bit easier to bend.
• Grade B: Allows more carbon and manganese, making it stronger (35 ksi yield, 60 ksi tensile). This is the go-to grade for most applications because that extra strength is usually beneficial. USA Piping Solution focuses heavily on stocking ASTM A53 Grade B Pipe.

Which one do you need? Depends on pressure, if you need to flange it (avoid Type F!), and your budget. But for general seamless use needing decent strength, Type S, Grade B is usually the answer.

Where Does ASTM A53 Seamless Pipe Show Up?

ASTM A53 Seamless Pipe, especially Grade B, is a real jack-of-all-trades. You’ll find it used reliably in tons of different places:

• Building & Structures: It's great for things like support columns, handrails, fence posts, scaffolding, and foundation pilings.
• Mechanical Gear: Used in making machine frames, parts for conveyor belts, and other engineered components.
• Basic Oil & Gas Work: Good for utility lines around facilities – think air, water, or low-pressure gas lines (not the big transmission pipelines, that's usually API 5L territory).
• Water Systems: Works well for moving water in distribution systems, treatment plants, or handling slurries at moderate pressure.
• Plant Utilities: Common for carrying steam, air, or gas around industrial plants or commercial buildings, as long as the pressure/temp isn't too extreme.
• HVAC Piping: Often used in heating and cooling systems.
• Fire Sprinklers: A very common choice for fire protection systems (often galvanized for this).

Because it's straightforward to weld, bend, and thread, folks find it easy to install, which only adds to its popularity.

Quick Reference: A53 Pipe Sizes & Weights

Need to estimate shipping weight or figure out support spacing? This chart gives you a feel for the dimensions and weights of common ASTM A53 Seamless Pipe (Type S) sizes. Keep in mind these are typical weights.

NPS (in)	OD (in)	Schedule	Wall (in)	lbs/ft	kg/m
1/2"	0.840	40 STD	0.109	0.85	1.27
1/2"	0.840	80 XH	0.147	1.09	1.62
1"	1.315	40 STD	0.133	1.68	2.50
1"	1.315	80 XH	0.179	2.17	3.24
2"	2.375	40 STD	0.154	3.66	5.44
2"	2.375	80 XH	0.218	5.03	7.48
3"	3.500	40 STD	0.216	7.58	11.29
3"	3.500	80 XH	0.300	10.26	15.27
4"	4.500	40 STD	0.237	10.80	16.07
4"	4.500	80 XH	0.337	15.00	22.32
6"	6.625	40 STD	0.280	18.99	28.26
6"	6.625	80 XH	0.432	28.60	42.56
8"	8.625	40 STD	0.322	28.58	42.55
8"	8.625	80 XH	0.500	43.43	64.63
12"	12.750	40 STD	0.375 *	49.61 *	73.83*
12"	12.750	80 XH	0.500 *	65.48 *	97.45*

FYI: For pipes bigger than 10 inches, the wall thickness for STD and XH might not exactly match Sch 40 and Sch 80. Best to check the ASME B36.10M standard for the official numbers.

Peace of Mind: Our Commitment to Certs and Compliance

Getting ASME SA53 Seamless Pipe from us means you're getting material you can trust, with the paperwork to prove it. We take compliance seriously.

• By the Book: All our pipe meets ASTM A53 / ASME SA53 requirements – chemicals, strength, dimensions, testing, the whole nine yards.
• Mill Test Reports (MTRs): This is your proof. Every batch comes with MTRs showing its specific chemical breakdown, the results of strength tests, confirmation of pressure testing, and that it meets the A53 standard (Type S, Grade A or B). Think of it as the pipe's pedigree.
• ISO 9001 Quality: Our internal processes follow ISO 9001:2015 guidelines. This means we have consistent checks and balances for sourcing, inspecting, and delivering your pipe reliably.
• Proper Marking: Every pipe (or bundle tag) is clearly marked with the essentials per the A53 standard:
• Manufacturer ID
• ASTM A53
• Type S
• Grade A or B
• Size & Schedule/Wall
• Length
• Heat Code (traceability!)
• XH or XXH if applicable.

This focus on documentation means you can be confident the pipe meets specs and safety standards.

Why Choose USA Piping Solution for Your A53 Pipe Needs?

You have choices when buying pipe. Here’s why folks keep coming back to USA Piping Solution for ASTM A53 Grade B Pipe:

• We Know Pipe: We've been doing this for years. Our team gets the difference between specs like A53 and A106 and can help you choose wisely.
• Stocked Deep in the USA: Forget long waits. Our warehouses are loaded with A53 seamless, ready to ship from locations across the country.
• Shipping That Keeps Up: We get your pipe on the truck and out to your site quickly. Our logistics are built for speed and reliability.
• Good Prices, No Games: We work hard to get good deals from mills and run efficiently, passing the savings to you with straightforward pricing.
• Quality is Job One: We only buy from mills we trust, and we provide the MTRs to back it up. You get reliable material.
• Need It Cut or Threaded? We offer extra services like cutting to length, threading, beveling, and coating coordination to make your life easier.
• Real People Ready to Help: Got questions? Need a quote fast? Our customer service team is focused on giving you the support you need, quickly and clearly.

Check Out These Related Pipes Too

A53 is great, but sometimes you need something different. We also carry:

Confused about which spec fits best? Ask us! We’re happy to help you compare.

Your Reliable Partner for ASTM A53 Seamless Pipe

When your project calls for dependable, versatile ASTM A53 Seamless Pipe, look no further than USA Piping Solution. We combine a huge US-based inventory with a solid commitment to quality, fair prices, and genuinely fast delivery. Get the certified ASTM A53 Seamless Pipe you need, backed by service you can count on.

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