Stainless Steel Sch 10 Pipe: Sizes, Weight & Pressure Ratings [2026]

Stainless steel sch 10 pipe is the thinnest standard wall designation for austenitic stainless piping under ASME B36.19M. Engineers and procurement teams choose schedule 10 when the system pressure falls well below the pipe’s rated capacity and the priority shifts to reducing material cost, installed weight, and welding labor. This guide covers every specification you need to write a purchase order or validate a piping design: e×act dimensions by NPS size, verified weight-per-foot data, ASME B31.3 pressure calculations, grade selection between 304 and 316, and joining methods for thin-wall stainless pipe.

What Is Schedule 10 Stainless Steel Pipe?

Schedule 10 stainless steel pipe is a thin-wall pipe classification defined by ASME B36.19M. The schedule number originated from a formula relating internal pressure to allowable stress: Schedule = 1,000 × P / S, where P is the internal working pressure in psi and S is the allowable stress of the material. A lower schedule number means a thinner wall relative to the pipe’s outside diameter.

Stainless steel has the same NPS pipe size as carbon steel outside diameter. The schedule pressure is also the same but there is a different code governing the steel thickness B36.19M. This the same 2″ NPS schedule 10 stainless pipe has the same 2.375″ outside diameter as a 2″ carbon pipe but is governed by a different table.

In the real world, schedule 10 is the thinnest wall commonly available in regular production for most NPS sizes. It is the preferred wall selection for low pressure stainless piping systems where the corrosion resistance of the material is more important than the mechanical performance of the wall. Typical areas of use are food-, drug- and water-plant facilities-anywhere that the pipe contains clean fluids at pressures significantly below the pipe’s burst pressure.

A link within to our entire range of stainless steel welded pipe which offers all of the schedules e.g. 10S, 40 S and 80 S.

Schedule 10 Stainless Steel Pipe Dimensions & Sizes Chart

The dimension table below lists every standard NPS size for schedule 10S stainless steel pipe per ASME B36.19M. All outside diameter and wall thickness values have been cross-validated against two independent sources.

Source: ASME B36.19M. All dimensions by pipe. ASTM A312/A312M-22 limits the dimensions of the pipe.

OD (outside diameter) are the nominal outside diameter (nominal NPS designation).

Please realize that from NPS 1/2″ through 1-1/2″, schedule 10S has only two wall thicknesses; the 0.083″ and 0.109″. After 2-1/2″ (0.120″), the wall starts fining up and continues to do so until the large-bore NPS sizes (16 and 18″) have the same 0.188″ thickness. This is useful information when analyzing the required pipe support spans for large bore piping.

Steel pipe sizes. For a complete guide across all pipe schedules and sizes look at our steel pipe sizes chart.

Schedule 10 Stainless Steel Pipe Weight per Foot

How Much Does Schedule 10 Stainless Steel Pipe Weigh?

Weight per linear foot is important for shipping loads, support members, and rigging calculations. The weights, below, are taken from the above dimension table and confirmed using published tables in ASME B36.19M.

In the case of long weight data for multiple schedules, our pipe weight per foot table covers the full range of data.

That actual weight difference is more likely to be an issue for even scheduled pipe, such as 40. For instance, a 200′ length of 4″ Sch 10S has an actual weight of 1,132 lb while the same length of 4″ Sch 40S weights 1,824 lb. As can be seen that’s 692 lb difference that will have a direct impact for the number of pipe hangers needed, the steel tube sizing for the pipe support frames and loads for the crane rigging.

Pressure Ratings for Schedule 10 Stainless Steel Pipe

The most frequently asked question regarding scheduling of 10 STAINLESS pipe is “Can schedule 10 stainless pipe handle this system? “The thin wall of schedule 10 stainless pipe calls into question its pressure handling capacity for any system. The answer to this question hinges on several factors including pipe size, operating temperature, welded versus non-welded construction, and the piping code used.

The table below shows calculated burst pressure (Barlow’s formula, S = 70,000 psi UTS for 304 stainless) and the corresponding conservative working pressure using a 4:1 safety factor with 0.70 joint efficiency:

Real-world scenario: A dairy processing plant in Wisconsin was upgrading its CIP (clean-in-place) system and needed to verify that 2″ Sch 10S 304L pipe could handle 150 psi at 180°F. Using the ASME B31.3 formula above with temperature-derated allowable stress (approximately 18,800 psi at 200°F), the calculated working pressure came to roughly 1,440 psi—nearly ten times the operating pressure. The plant engineer approved Sch 10S, saving over $3,200 compared to Sch 40S across 400 feet of CIP supply and return lines. The gas purge system for the pasteurizer operated at only 15 psi, well within the pipe’s capacity.

304 vs 316 Stainless Steel: Which Grade for Sch 10 Pipe?

Grade selection determines corrosion performance, weldability, and project cost. The two dominant grades for schedule 10 stainless pipe are 304/304L and 316/316L, both austenitic alloys covered under ASTM A312.

The 2% molybdenum addition in 316 is what lends it substantially improved resistance to chloride pitting corrosion and the primary reason why 316L has become the industry standard for coastal environments, chemical plant chloride solution handling, and pharmaceutical clean rooms demanding enhanced product purity. For indoor locations with chloride levels below 200 ppm-such as municipal water delivery, HVAC condensate drains, or brewery CIP lines-304 stainless provides similar service at a lower material expense.

Read more about 304 stainless properties and corrosion in our stainless steel alloy 304 properties guide and our corrosion resistance articles.

A field note from welding practitioners: most contractors consider using 316L filler metal on 304 base metal a waste of money. The filler should match the base grade unless the weld joint itself will face a more aggressive environment than the parent pipe.

Schedule 10 vs Schedule 40 Stainless Steel Pipe

What Is the Difference Between SCH 10 and SCH 40 Stainless Steel Pipe?

The main differentiator between schedule 10 and schedule 40 stainless pipe is the thickness of wall-that then drives several other factors: pressure rating, weight, cost, and how it behaves while being fabricated. Both use the same at NPS for any given outside diameter so a 4″ Sch 10 pipe fits the same fittings and flanges as a 4″ Sch 40 pipe. It is the internal diameter that is different.

The weight saving percentage increases substantially as the nominal bore of the pipe increases. For a 4″ NPS pipe, Sch 10S is 48 percent lighter than Sch 40S. Above 6″ NPS, the savings are >50% across the board.

A veteran mechanical engineer on Eng-Tips reported the real-world tension around schedule selection: “Procurement managers like to propose Sch 10S due to ‘significant cost savings.’ They get big bonuses. The engineers then get dumped on.” The hidden cost that often negates the material savings is support spacing—Sch 10 pipe requires closer pipe supports due to its lower moment of inertia, and the additional hangers, structural steel, and labor can eat into the price advantage.

Real-world scenario: A municipal water treatment facility in Texas had specified Sch 40S for all low-pressure distribution lines by default. During value engineering, the piping contractor identified 2,000 feet of 4″ and 6″ runs operating below 80 psi at ambient temperature. Switching those qualifying runs to Sch 10S reduced the total pipe weight by 35%—from 31,580 lb to 20,400 lb—and cut material cost by approximately 18%, or about $12,000. The additional pipe supports added roughly $2,800, yielding a net savings of $9,200.

Welded vs Seamless Sch 10 Pipe: ASTM A312 & Manufacturing Standards

The ASTM standard you reference on a purchase order will determine the manufacturing methodology for your schedule 10 stainless pipe and the testing required. Be sure to get this right or risk rejected material, delay, and code compliance issues.

The standard ASTM A312 is one you will see most often for schedule 10 stainless pipe. It enumerates welded and non-welded (pierced/extruded) pipe manufacturing in one standard, applying separate test requirements for each. Welded pipe manufactured under A312 requires nondestructive examination of the weld seam-Weld Seam Efficiency Factor (E = 0.85 for welded, E= 1.0 for seamless)-directly impacts the ASME B31.3 allowable working pressure calculations.

The big differentiators between ERW and TIG-welded pipe manufacturing is weld quality and therefore the heat involved in making the weld. ERW pipe brings a high frequency current through the steel to effect the forge weld, whereas TIG welding directs a tungsten arc with filler wire into the weld joint. If you are working with a seamless stainless pipe, then the weld joint/heat affected zone goes away completely. Our stainless steel welded pipe manufacturing guide walks you through the process.

When ordering schedule 10S pipe for process piping, always confirm your ASTM standard covers your needed NDE requirement. A312 examines the weld seam, A778 does not, so A778 pipe may be the proper purchase but won’t meet ASME B31.3 without additional examination.

A purchase order line item for the above purchase order would be written as follows: “ASTM A312 TP304L, Sch 10S, Welded, 2″ NPS 20 ft random length, per ASME B36.19M. ” This provides clarity on grade, schedule, manufacturer, and dimension standard. Confusing tubing for pipe (or the other way around) is the most common mistake we see in purchases. (See-out pipe vs tube-for the difference.)

Common Applications for Schedule 10 Stainless Pipe

The ideal use for Schedule 10 stainless pipe is within the industrial setting where a piping system will be transporting non-flowing or slightly corrosive liquids at relatively low pressure. The thin construction allows for both reduced cost of material and installation, and the stainless material adds necessary corrosion protection.

In stainless water piping systems, Sch 10S seems well-suited to above grade distribution. For fire sprinkler piping, stainless Sch 10 is occasionally listed as a corrosion resistant substitute for black steel in corrosive environments (elevated humidity, chemical exposure).

Real-world scenario: A chemical processing facility in Louisiana needed 500 feet of 4″ pipe for transferring a dilute sulfuric acid solution (pH 4.5, ambient temperature, 60 psi operating pressure). The initial specification called for 316 Sch 40S. After the piping engineer ran the ASME B31.3 pressure calculation showing that 4″ Sch 10S 316L welded pipe was rated for 653 psi working pressure at ambient—more than ten times the operating pressure—the project switched to Sch 10S. The material cost dropped from approximately $38,500 to $24,500, a savings of $14,000, while still exceeding every code requirement for the service.

Selecting Fittings & Joining Methods for Schedule 10 Pipe

Schedule 10 joins must be more carefully heat controlled and fit up than the heavier schedules. The very thin wall (as low as 0.083″ for 1/2″ NPS) means less room for error during welding, and not all fits are appropriate.

For butt weld pipe fittings, use the fitting schedule that corresponds to the pipe schedule. At the joint, unmatching wall thickness creates a concentration of stress.

Welders who work with schedule 10 stainless regularly emphasize root fusion technique over gapping. One welder on Reddit advised: “2″ s/10 ss pipe needs no gap. Just fuse the root—you get a better looking weld which will pass any test.” Another tip that comes up consistently: “Start colder than you think you should be, then work up in heat until you get the penetration you’re looking for.”

For large-diameter Sch 10 (10″ and above), cutting and welding can cause distortion. An Eng-Tips poster documented severe issues: “My contractor is having a very tough time with buttwelding 12″ schedule 10 SS 304L pipe. Every time they cut it, it distorts and goes out of round.” The solution is controlled heat input, proper clamping or fixturing, and staggered weld sequences. If you need to weld external attachments like pipe shoes or stiffening rings, heat control becomes even more critical—excessive input will warp the pipe wall.

Stainless Steel Pipe Market: What’s Changing in 2025–2026

The local market has ramped up production of stainless steel pipe to meet the increased demand from the new investments. In addition, increased focus on food safety, environmental issues, and water treatment have led to upgrades of existing infrastructure, increasing the need for stainless steel pipe. This supply-side trend is useful for procurement teams in timing their purchases.

Many trends will impact stainless pipe supply and pricing through 2026. Here are a few examples:

• • Search demand growth: DataForSEO keyword data shows “stainless steel sch 10 pipe” search volume grew 31% sequentially in Q1 2026, and “304 stainless steel pipe” surged 71%. This signals rising specification activity across engineering and procurement teams.

• • Non-welded pipe premium: The non-welded (pierced) stainless steel pipe segment is growing at 7.5% CAGR (2024–2031), faster than the welded segment. As demand for weld-free pipe increases, price premiums may widen—which makes welded Sch 10S an even more cost-effective choice for low-pressure service.

• • Welded tube price stabilization: After sustained pricing pressure throughout 2025, welded stainless tube prices began stabilizing in late 2025. Mills have absorbed raw material cost increases and inventory drawdowns are leveling off.

• • Green manufacturing: European and North American mills are investing in lower-carbon production methods for stainless steel, driven by ESG reporting requirements. This may add a modest cost premium but could become a supply advantage in government projects requiring environmental compliance documentation.

Frequently Asked Questions

What is SS 304 Schedule 10 pipe?

View Answer

SS 304 Schedule 10 pipe is austenitic stainless steel pipe. It is manufactured from SAE/AISI 304 alloy. The wall thickness of Schedule 10S pipes is specified as the schedule 10S in ASME B36.19M.

The steel is made to ASTM A312 TP304 specification. It finds application in processing of foods, water treatment plants and heat ventilation etc.

What is SCH 10 pipe made of?

View Answer

Schedule 10 pipe is available in either carbon steel(Astm A53, asme B36.10M) or stainless steel(ASTM A312, ASME B36.19M). Stainless steel is typically based on austenitic alloys-namely 304, 304L, 316 or 316L, and consists of 16-20% chromium and 8-14% nickel. Schedule 10 is a reference to the wall thickness not the material.

What is the wall thickness of schedule 10 stainless steel pipe?

View Answer

Wall thickness: NPS sizes vary. Typical values (per ASME B36.19M): 1″ NPS = 0.109″ (2.77 mm), 2″ NPS = 0.109″ (2.77 mm), 4″ NPS=0.120″ (3.05 mm), 6″ NPS=0.134″ (3.40 mm). Range from 0.083″ (2.11 mm) for NPS 1/2″ to 0.312″ (7.92 mm) for NPS 30″.

See the full dimension table in the Sizes Chart section above.

Can schedule 10 stainless steel pipe be used for gas lines?

View Answer

Yes, but only if. For lower system pressures, under the calculated allowable working pressure of the pipe per the piping code applicable to your situation (ASME B31.3 for process gas, NFPA 54/IFGC for fuel gas), schedule 10S stainless (minimum wall thickness, see below) will pass pressure calculations. Low pressure gas distribution systems (less than 5 psi) will be fine with Sch10 S stainless pipe as they do not need to have their pressure calculated, they only have to be capable of passing the minimum code requirement for an allowable pressure. Many codes have minimum wall thickness rules for gas service other than high-pressure calculations, so always check with the AHJ before specifying Sch10 pipe for gas.

What is the difference between Schedule 10 and Schedule 10S?

View Answer

The dimensions for schedule 10 are from ASME B36.10M (carbon steel pipe table) and the dimensions for schedule 10S are from ASME B36.19M (stainless steel pipe table). The wall thickness values for schedule 10 and schedule 10S are the same for NPS 1/8″ through 12″. The schedule 10S wall thickness values are larger at NPS 14″ and above. Use “Sch 10S” when specifying stainless pipe.

How do you weld schedule 10 stainless steel pipe?

View Answer

Schedule 10 can be welded using the same GTAW (TIG) welding parameters as schedule 10 carbon steel pipe. Use ER308L wire for welding 304 base-metal or ER316L wire for 316 base-metal. Back-purging the inside of the pipe with 99.99% argon while welding will prevent oxidation of the pipe (sugaring). When butt welding small diameter pipe (under 3 inch NPS), maintain the fit-up with no gap and fuse the root without a gap using a lower amperage than you expect the root to draw, and then build up to the amperage you will need in short order. When welding pipe 10 inches and above, use fixtures and spacers to prevent distortion from heat build-up. Thin-wall pipe grow out of circular while welding and cutting; hot to cold often creates a change of one-eighth (1/8) to one quarter (1/4) of an inch.

Baling Steel engineering team has reviewed. Updated on 2026 April.