ASTM A312 SS 304 SCH 10S SMLS 6000MM Pipe
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With more than 18 years of stainless steel export experience, GNEE deeply understands the quality concerns faced by buyers when sourcing ASTM A312 SCH 10S stainless steel pipes. To ensure full traceability and consistent quality, each production batch can be supplied with an EN 10204 3.1 Mill Test Certificate (MTC), dimensional inspection reports, and third-party inspection documents upon request.
Our ASTM A312 TP304 seamless stainless steel pipes are manufactured from solid billets through hot piercing, hot rolling, or cold drawing processes, with no longitudinal weld seam. This ensures higher structural integrity and a smoother internal surface, making the pipes suitable for high-pressure fluid transport applications.
Since SCH 10S stainless steel pipes have relatively thin wall thickness, dimensional accuracy is particularly critical. For example, a 2-inch NPS SCH 10S pipe has a nominal wall thickness of only 2.77 mm. Excessive negative tolerance can significantly reduce pressure-bearing capacity and may create safety risks during welding and operation. To address this, we strictly follow ASTM A999 dimensional requirements, controlling wall thickness (WT) tolerance within ±12.5%. In many production batches, the actual tolerance is even better than the standard requirement.
All ASTM A312 TP304 round pipes undergo full solution annealing, followed by pickling and passivation to remove heat tint, oxide scale, and surface contaminants. The final surface is a clean, uniform silver-white matte finish with enhanced corrosion resistance. Each pipe is visually inspected before shipment to ensure there are no rust spots, heavy scratches, scale, or processing defects.
In addition, all pipe ends are deburred and precisely finished to ensure safe handling and improved welding preparation. For project-specific requirements, we can also supply beveled ends to facilitate on-site welding and reduce installation time.
ASTM A312 TP304 SCH 10S SMLS Stainless Steel Pipe Specification
| Item | Description |
|---|---|
| Standard | ASTM A312 / ASME SA312 |
| Material Grade | TP304 (SS 304 / UNS S30400) |
| Manufacturing Process | Seamless (SMLS) |
| Pipe Type | Stainless Steel Pipe |
| Nominal Pipe Size (NPS) | According to requirement (e.g., 1/2"–24") |
| Schedule | Sch 10S 40S 80S |
| Length | 6000 mm (6 meters) / Random or fixed length available |
| Surface Finish | Pickled / Annealed / Polished (optional) |
| End Finish | Plain End (PE) / Beveled End (BE) |
| Inspection | Chemical analysis, mechanical testing, hydrostatic test, NDT (optional) |
| Certification | ISO, SGS, BV, EN 10204 3.1/3.2 available |
ASTM A312 UNS S30400 seamless pipe Chemical Composition
| Grade | C (%) | Mn (%) | P (%) | S (%) | Si (%) | Cr (%) | Ni (%) | N (%) |
| TP304 | ≤ 0.08 | ≤ 2.00 | ≤ 0.045 | ≤ 0.030 | ≤ 1.00 | 18.0–20.0 | 8.0–11.0 | ≤ 0.10 |
Mechanical Properties of ASTM A312 TP304 stainless pipe
| Grade | Tensile Strength (min) | Yield Strength (min) | Elongation in 2" (min) | Hardness (max) |
| TP304 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | 192 HBW / 90 HRB |
ASME B36.19 / ASTM A312 Stainless Steel Pipe Dimensions
The standard applies to pipes ranging from NPS 1/8" to 30" (DN6 to DN750) with wall thicknesses conforming to ASME B36.19 schedules (e.g., SCH 10S, 40S, 80S, XXS).
| NPS (Inch) | DN (mm) | Outside Diameter (mm) | Sch 5S (WT mm) | Sch 10S (WT mm) | Sch 40S (WT mm) | Sch 80S (WT mm) |
| 1/8" | 6 | 10.3 | - | 1.24 | 1.73 | 2.41 |
| 1/4" | 8 | 13.7 | - | 1.65 | 2.24 | 3.02 |
| 3/8" | 10 | 17.1 | - | 1.65 | 2.31 | 3.20 |
| 1/2" | 15 | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 |
| 3/4" | 20 | 26.7 | 1.65 | 2.11 | 2.87 | 3.91 |
| 1" | 25 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
| 1-1/4" | 32 | 42.2 | 1.65 | 2.77 | 3.56 | 4.85 |
| 1-1/2" | 40 | 48.3 | 1.65 | 2.77 | 3.68 | 5.08 |
| 2" | 50 | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 |
ASTM A312 SS 304 pipe Pressure Rating
| NPS (in) | OD (mm) | Sch 5S | Sch 10S | Sch 40S | Sch 80S |
|---|---|---|---|---|---|
| 1/2" | 21.3 | 580 psi / 40 bar | 900 psi / 62 bar | 1,900 psi / 131 bar | 3,100 psi / 214 bar |
| 3/4" | 26.7 | 480 psi / 33 bar | 750 psi / 52 bar | 1,600 psi / 110 bar | 2,600 psi / 179 bar |
| 1" | 33.4 | 420 psi / 29 bar | 650 psi / 45 bar | 1,350 psi / 93 bar | 2,200 psi / 152 bar |
| 1-1/2" | 48.3 | 300 psi / 21 bar | 480 psi / 33 bar | 1,000 psi / 69 bar | 1,650 psi / 114 bar |
| 2" | 60.3 | 260 psi / 18 bar | 420 psi / 29 bar | 900 psi / 62 bar | 1,450 psi / 100 bar |
| 3" | 88.9 | 180 psi / 12 bar | 300 psi / 21 bar | 650 psi / 45 bar | 1,050 psi / 72 bar |
| 4" | 114.3 | 140 psi / 10 bar | 240 psi / 17 bar | 500 psi / 34 bar | 800 psi / 55 bar |
| 6" | 168.3 | 100 psi / 7 bar | 170 psi / 12 bar | 350 psi / 24 bar | 580 psi / 40 bar |
What does sch 10 pipe mean?
Schedule 10 (SCH 10) refers to a specific wall thickness standard for pipes. The "schedule" indicates the thickness relative to the pipe's diameter; SCH 10 features a relatively thin wall. It is primarily used for lightweight, low-pressure applications, offering excellent cost-efficiency and easier installation
ASTM A312 TP304 SCH 10S Seamless Pipe price
| NPS (Inch) | OD (mm) | Schedule | WT (mm) | Weight ( kg/m ) | Indicative Price (USD/Meter) |
| 1/2" | 21.34 | 10S | 2.11 | 1.01 | $3.80 – $4.50 |
| 3/4" | 26.67 | 10S | 2.11 | 1.30 | $4.90 – $5.80 |
| 1" | 33.40 | 10S | 2.77 | 2.12 | $8.10 – $9.50 |
| 1-1/2" | 48.26 | 10S | 2.77 | 3.16 | $12.00 – $14.50 |
| 2" | 60.33 | 10S | 2.77 | 3.99 | $15.20 – $18.00 |
| 4" | 114.30 | 10S | 3.05 | 8.50 | $32.50 – $38.00 |
| 6" | 168.28 | 10S | 3.40 | 14.04 | $54.00 – $62.00 |
Please send your detailed inquiry (size, schedule, quantity) to our team, and we will provide a fixed quote valid for 7 days.
ASTM A312 SS 304 SCH 10S SMLS 6000MM Pipe Supplier
Our ASTM A312 TP304 SCH 10S SMLS steel pipes are all 100% eddy current tested to ensure zero leakage. We have 6000mm long steel pipes in stock and can ship quickly within 5-7 business days. All orders are reinforced with packaging to protect the pickled surface and maintain the roundness of the steel pipes during transportation.
Inspection & Testing
| Inspection Item | Test Method |
|---|---|
| Chemical Composition Analysis | PMI (Positive Material Identification) / Spectrometer |
| Dimensional Tolerance Inspection | Laser diameter gauge / Micrometer |
| Non-Destructive Testing (NDT) | Eddy Current Testing (ECT) |
| Mechanical Property Testing | Tensile Test / Hardness Test |
| Process Performance Test | Flattening Test / Flanging Test |
| Surface Quality Inspection | Visual Inspection |
Protective Packaging:
To protect the 6000mm long pipe, we use independent plastic sleeves and high-strength end caps to prevent scratches and deformation during transportation.
