SCH 40 stainless steel pipe (SCH40S) stands for the most commonly‑used standard‑wall stainless‑steel pipe under American standards. SCH refers to wall‑thickness schedule, a wall‑thickness grade for general‑purpose engineering applications. The standard industry designation is SCH40S. It mainly applies to round pipes, featuring good rust resistance, temperature tolerance and hygienic properties.
Glory Steel is a reliable manufacturer of SCH40S stainless steel pipes. We support custom wall thickness, and provide services including cutting, welding, and anti‑corrosion coating. Customers can inquire about specifications, pressure rating, unit weight and matching pipe fittings to meet your engineering piping demands.
Specifications
| Item | SCH40S Stainless Steel Pipe |
| MOQ | 10 Tons |
| Material Grade | TP304 / 304L, TP316 / 316L |
| Wall Thickness | SCH40S |
| WD | 1/2” to 8 inch |
| Length | 1-12 m |
| Packaging | Standard export packaging |
| Lead Time | 10-18 days |
| Standards | ASTM A312 / ASME B36.19M, EN 10217-7, JIS G3459 |
Common Material Grades
- TP304 / 304L: General‑purpose austenitic stainless‑steel pipe, non‑magnetic. Grade L is low‑carbon grade, suitable for welding applications.
- TP316 / 316L: Marine‑grade stainless‑steel pipe for marine, acid‑alkali and other highly corrosive environments. Grade L is preferred for welding conditions.
Common Forms
- Original Factory Finishes: Hot rolled black scale pipe, pickled matte white stainless steel pipe.
- Secondary Processing Surface Finishes: Brushed, satin matte, mirror polished, black oxide finish, sanitary polishing.
Note: Precision tubing adopts separate dimensional standards and can be customized based on SCH 40 pipe blanks.
Key Advantages
- Specifications and Standards: This system has a fixed nominal outer diameter; the wall thickness increases with the diameter, and it matches American standard fittings and flanges.
- Controllable Pressure Bearing: SCH 40S stainless steel pipes feature much higher pressure resistance than SCH 5S pipes with the same nominal diameter, ideal for medium and high-pressure fluid conveying systems.
- Corrosion Resistance and Durability: It can operate stably in seawater and high-humidity chemical environments for extended periods. With a 1.5mm corrosion allowance, its service life can reach over 30 years.
- Hygienic and clean: With uniform and smooth inner and outer walls, it exhibits low fluid resistance and is not prone to dirt accumulation. Suitable for general pure water applications; sanitary stainless steel pipes are recommended for aseptic fluid transport.
Applications
- Petrochemical & Gas: Conveyance of corrosive media, field pipeline laying, piping for purified‑water production equipment.
- Food & Pharmaceutical: Transfer pipelines for beer and milk, process piping for hygienic workshops, sanitary tubing.
- Marine & Construction: Circulating‑water systems on vessels, corrosion‑resistant water supply & drainage for buildings, seawater and sewage purification facilities.
Schedule 40 SS Pipe Dimension, Size & Weight Chart
| Nominal Pipe Size (NPS) | Outer Diameter (mm) | Wall Thickness (mm) | Inner Diameter (mm) | Theoretical Weight (kg/m) |
| 1/2″ | 21.3 | 2.77 | 15.8 | ~0.80 |
| 3/4″ | 26.7 | 2.87 | 21.0 | ~1.03 |
| 1″ | 33.4 | 3.38 | 26.6 | ~1.30 |
| 1-1/4″ | 42.2 | 3.56 | 35.1 | ~1.71 |
| 1-1/2″ | 48.3 | 3.68 | 40.9 | ~1.91 |
| 2″ | 60.3 | 3.91 | 52.5 | ~2.40 |
| 3″ | 88.9 | 5.49 | 77.9 | ~4.54 |
| 4″ | 114.3 | 6.02 | 102.3 | ~5.88 |
Note: 2‑inch SCH40S stainless‑steel pipe features 60.3 mm outer diameter and 3.91 mm wall thickness. It is one of the most widely‑adopted sizes in industrial piping systems.
SCH40S Pipe Manufacturing Types
- Seamless SCH40S Pipe: No weld seam, uniform material property, produced from solid stainless‑steel billets. Suitable for high‑pressure service conditions.
- Welded SCH40S Pipe: Manufactured from stainless‑steel strip with welded seam. Cost‑effective, high dimensional accuracy and widely selected by customers.
Pressure Reference for TP304 / TP316 (Ambient Temperature)
| Nominal Pipe Size | Outer Diameter (mm) | Wall Thickness (mm) | Burst Pressure (psi) | Working Pressure (psi) |
|---|---|---|---|---|
| 1/2″ | 21.3 | 2.77 | ~19,464 | ~4,866 |
| 3/4″ | 26.7 | 2.87 | ~16,142 | ~4,036 |
| 1″ | 33.4 | 3.38 | ~15,171 | ~3,793 |
| 1‑1/2″ | 48.3 | 3.68 | ~11,447 | ~2,862 |
| 2″ | 60.3 | 3.91 | ~9,726 | ~2,432 |
| 3″ | 88.9 | 5.49 | ~9,257 | ~2,314 |
Glory Steel supplies full‑range TP304 / 316L SCH40S seamless and welded stainless‑steel pipes. Custom services including fixed‑length cutting, polishing, pickling, solution annealing and bevel end processing are available.
Glory Steel factory, located in Tianjin, China, is an ISO 9001, ISO 14001, and CE-certified factory with an annual output of 100,000 tons. Professionally manufacture SS steel pipes from SCH 10 to SCH 80, including seamless and welded pipes. Surface finishes: pickled/matte/bright polishing/sanitary polishing. Sizes: 1/2” to 8 inches. Pipe fittings: elbows, flanges, tees, reducers, caps, couplings, and unions. With our high-quality products and services, we export to over 120 countries.
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