Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of SCH 40 Stainless Steel Pipe Supplier | ASTM A312 304 316L Schedule 40S Pipe in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
SCH 40 stainless steel pipe is a commonly specified stainless steel piping product with a medium wall thickness designed for general industrial pressure, corrosion resistance and long service life. It is widely used in water systems, chemical pipelines, food processing, marine piping, HVAC systems, construction projects and general fluid transportation.
For stainless steel piping systems, SCH 40S is commonly used under ASME B36.19M, while many buyers also search it as Schedule 40 stainless steel pipe or SCH 40 SS pipe. ASME B36.19M covers dimensional standardization for welded and seamless wrought stainless steel pipe used under high or low temperatures and pressures.
Xi'an Dongmeng Group Co., Ltd. supplies ASTM A312 / ASME SA312 SCH 40 stainless steel pipe in TP304, TP304L, TP316, TP316L and other stainless steel grades. Products are available in seamless and welded types, with custom cutting, beveling, polishing, passivation, inspection certificates and seaworthy export packing.
ASTM A312 covers seamless, straight-seam welded and heavily cold worked austenitic stainless steel pipe for high-temperature and general corrosive service, and requires heat treatment plus mechanical and nondestructive or hydrostatic testing.
Core Advantages
Medium Wall Thickness for Industrial Use
SCH 40 stainless steel pipe provides a practical balance between strength, pressure capacity, weight and cost.
304 / 304L for General Corrosion Resistance
Suitable for water treatment, architectural piping, food systems, HVAC and general industrial pipelines.
316 / 316L for Chloride and Marine Environments
316L stainless steel contains molybdenum, improving resistance to chloride-related corrosion compared with 304 grades.
ASTM A312 / ASME SA312 Compliance
Suitable for industrial buyers requiring recognized international pipe standards.
Custom Processing Available
Cutting, beveling, threading, polishing, passivation, marking and export packaging can be arranged according to project requirements.
Specification Table
| Item | Available Range |
|---|---|
| Product | SCH 40 Stainless Steel Pipe / SCH 40S Stainless Steel Pipe |
| Standard | ASTM A312, ASME SA312, ASME B36.19M |
| Grades | TP304, TP304L, TP316, TP316L, TP321, TP347, 310S |
| Type | Seamless, Welded, ERW, EFW |
| NPS Size | 1/8"–24", larger sizes customized |
| Outside Diameter | 10.3 mm–609.6 mm, customized |
| Wall Thickness | SCH 40S / SCH 40, customized wall thickness available |
| Length | 5.8 m, 6 m, 11.8 m, 12 m, SRL, DRL, cut length |
| Surface | Pickled, annealed, bright annealed, polished, passivated |
| Ends | Plain end, beveled end, threaded end, capped end |
| Testing | PMI, tensile test, flattening test, hydrostatic test, eddy current test |
| Certificate | EN 10204 3.1 / 3.2, MTC, third-party inspection |
| Packing | Plastic caps, bundles, woven bags, wooden cases, seaworthy packing |
SCH 40S Stainless Steel Pipe Dimension Chart
| NPS | OD mm | OD inch | SCH 40S Wall mm | SCH 40S Wall inch |
|---|---|---|---|---|
| 1/8" | 10.3 | 0.405 | 1.73 | 0.068 |
| 1/4" | 13.7 | 0.540 | 2.24 | 0.088 |
| 3/8" | 17.1 | 0.675 | 2.31 | 0.091 |
| 1/2" | 21.3 | 0.840 | 2.77 | 0.109 |
| 3/4" | 26.7 | 1.050 | 2.87 | 0.113 |
| 1" | 33.4 | 1.315 | 3.38 | 0.133 |
| 1-1/4" | 42.2 | 1.660 | 3.56 | 0.140 |
| 1-1/2" | 48.3 | 1.900 | 3.68 | 0.145 |
| 2" | 60.3 | 2.375 | 3.91 | 0.154 |
| 2-1/2" | 73.0 | 2.875 | 5.16 | 0.203 |
| 3" | 88.9 | 3.500 | 5.49 | 0.216 |
| 4" | 114.3 | 4.500 | 6.02 | 0.237 |
| 5" | 141.3 | 5.563 | 6.55 | 0.258 |
| 6" | 168.3 | 6.625 | 7.11 | 0.280 |
| 8" | 219.1 | 8.625 | 8.18 | 0.322 |
| 10" | 273.1 | 10.750 | 9.27 | 0.365 |
| 12" | 323.9 | 12.750 | 9.53 | 0.375 |
| 14" | 355.6 | 14.000 | 9.53 | 0.375 |
| 16" | 406.4 | 16.000 | 9.53 | 0.375 |
| 18" | 457.2 | 18.000 | 9.53 | 0.375 |
| 20" | 508.0 | 20.000 | 9.53 | 0.375 |
| 24" | 609.6 | 24.000 | 9.53 | 0.375 |
ASME B36.19M is the stainless steel pipe dimensional standard, and public pipe dimension charts list SCH 40S stainless pipe sizes from small NPS up to large pipe sizes.
Material Grades
TP304 SCH 40 Stainless Steel Pipe
TP304 is the most commonly used austenitic stainless steel grade for general industrial piping. It offers good corrosion resistance, formability and weldability, making it suitable for water systems, food processing, architectural piping and general fluid transportation.
TP304L SCH 40 Stainless Steel Pipe
TP304L has a lower carbon content than TP304, improving resistance to intergranular corrosion after welding. It is recommended for welded piping systems where post-weld heat treatment is not practical.
TP316 SCH 40 Stainless Steel Pipe
TP316 contains molybdenum and offers better corrosion resistance than 304 in chloride-containing environments. It is used in chemical processing, coastal projects, marine piping and industrial equipment.
TP316L SCH 40 Stainless Steel Pipe
TP316L combines molybdenum-bearing corrosion resistance with low carbon content. It is widely used for welded systems in marine, chemical, pharmaceutical and food-grade applications.
Chemical Composition
| Grade | C max | Mn max | P max | S max | Si max | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0–20.0 | 8.0–11.0 | - |
| TP304L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0–20.0 | 8.0–13.0 | - |
| TP316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0–18.0 | 11.0–14.0 | 2.0–3.0 |
| TP316L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
ASTM A312 grade composition tables commonly list TP304, TP304L, TP316 and TP316L with chromium, nickel and molybdenum ranges matching the above grade families
Mechanical Properties
| Grade | Tensile Strength min | Yield Strength min | Elongation min |
|---|---|---|---|
| TP304 | 515 MPa | 205 MPa | 35% |
| TP304L | 485 MPa | 170 MPa | 35% |
| TP316 | 515 MPa | 205 MPa | 35% |
| TP316L | 485 MPa | 170 MPa | 35% |
ASTM A312 mechanical property tables commonly list these minimum tensile, yield and elongation values for TP304, TP304L, TP316 and TP316L stainless steel pipe.
SCH 40 vs SCH 40S Stainless Steel Pipe
| Item | SCH 40 | SCH 40S |
|---|---|---|
| Common Search Term | Schedule 40 pipe | Schedule 40S stainless steel pipe |
| Main Use | Carbon steel and general pipe schedules | Stainless steel piping under ASME B36.19M |
| Buyer Search Habit | "sch 40 stainless steel pipe" | "sch 40s stainless steel pipe" |
| SEO Recommendation | Use in title and intro | Use in technical tables and standard sections |
Applications
Chemical Processing
Used for chemical transfer lines, plant piping, process water, moderate corrosive media and equipment connection systems.
Water Treatment
Suitable for clean water pipelines, wastewater systems, desalination pre-treatment, pump lines and filtration systems.
Food & Beverage
304 / 316L SCH 40 stainless steel pipe can be used for hygienic piping, beverage lines, food-grade water systems and processing equipment.
Marine & Coastal Projects
316L SCH 40 stainless steel pipe is recommended for coastal and chloride-containing environments where better corrosion resistance is required.
Oil & Gas & Petrochemical
Used for auxiliary pipelines, plant utility lines, instrument air systems, drainage lines and general industrial piping.
Construction & Mechanical Systems
Applied in building services, handrail structures, HVAC piping, fire protection systems and mechanical equipment connections.
Inspection & Quality Assurance
Xi'an Dongmeng Group Co., Ltd. provides strict quality control before shipment:
| Inspection Item | Description |
|---|---|
| Raw Material Check | Heat number, grade, standard and chemical composition verification |
| Dimension Inspection | OD, wall thickness, length, ovality and straightness |
| Surface Inspection | Pickling quality, polishing quality, cracks, dents and scratches |
| PMI Test | Grade verification for 304, 316L and other stainless grades |
| Mechanical Test | Tensile strength, yield strength, elongation |
| Hydrostatic Test | Pressure testing according to order requirements |
| Eddy Current Test | NDT inspection for seamless and welded pipe |
| MTC | EN 10204 3.1 / 3.2 available |
| Third-party Inspection | SGS, BV, TUV, Lloyd's or customer-appointed inspection accepted |
Packaging & Shipping
Plastic caps on both ends
Bundled with steel strips
Waterproof wrapping
Wooden cases or steel frames for precision pipes
Export seaworthy packing
Clear label with grade, size, heat number and standard
Container loading support with packing photos
Shipping by sea, railway or air freight according to order volume
Why Choose Xi'an Dongmeng Group Co., Ltd.
Full Stainless Steel Pipe Supply Range
SCH 5S, SCH 10S, SCH 40S, SCH 80S and customized wall thickness available.
Multiple Grades Available
304, 304L, 316, 316L, 321, 347, 310S and duplex grades can be supplied.
Project-oriented Service
We support EPC contractors, distributors, engineering companies and OEM manufacturers.
Custom Processing
Cutting, beveling, polishing, threading, passivation and special marking available.
Export Experience
Seaworthy packing, MTC documents, third-party inspection and global delivery support.
FAQ
1. What is SCH 40 stainless steel pipe?
SCH 40 stainless steel pipe is a stainless steel pipe with a medium wall thickness commonly used for industrial piping, water systems, chemical lines and general fluid transportation.
2. Is SCH 40 the same as SCH 40S?
For stainless steel pipe, SCH 40S is commonly used under ASME B36.19M. Many buyers search it as SCH 40 stainless steel pipe, but technical specifications often refer to SCH 40S.
3. What grades are available?
Common grades include ASTM A312 TP304, TP304L, TP316 and TP316L. Other grades such as TP321, TP347 and 310S can also be supplied.
4. What is the wall thickness of 2 inch SCH 40S stainless steel pipe?
2 inch SCH 40S stainless steel pipe has an outside diameter of 60.3 mm and a wall thickness of 3.91 mm.
5. What is the wall thickness of 4 inch SCH 40S stainless steel pipe?
4 inch SCH 40S stainless steel pipe has an outside diameter of 114.3 mm and a wall thickness of 6.02 mm.
6. Which is better, 304 or 316L SCH 40 stainless steel pipe?
304 is suitable for general corrosion resistance and cost-effective applications. 316L is better for marine, chloride-containing and chemical environments.
7. Can you supply seamless and welded SCH 40 stainless steel pipe?
Yes. We can supply seamless, welded, ERW and EFW stainless steel pipe according to project requirements.
8. Can you provide MTC 3.1?
Yes. EN 10204 3.1 material test certificate can be supplied with shipment. Third-party inspection can also be arranged.
9. Can you cut SCH 40 stainless steel pipe to custom length?
Yes. We can provide fixed length, random length, double random length and precision cut-to-length service.
10. What information should I provide for quotation?
Please provide grade, standard, size, wall thickness or schedule, length, quantity, surface, pipe end type, destination port and certificate requirements.
Contact Us
Xi'an Dongmeng Group Co., Ltd.
Phone / WhatsApp / WeChat: +8615769214734
Email: office@dongmjd.com
Looking for SCH 40 stainless steel pipe price, dimension chart or MTC sample? Contact us today for a fast quotation.
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