-
Products
- VALVES
- FITTINGS
- FORGED FLANGE
- SS WELDED PIPE&TUBE
- SS SMLS TUBE
-
SS SMLS PIPE
- SS SMLS PIPE 2507 ASTM A790
- SS SMLS PIPE 2205 ASTM A790
- SS SMLS PIPE S31803 ASTM A790
- SS SMLS PIPE 904L ASTM A240
- SS SMLS PIPE TP321 ASTM A312
- SS SMLS PIPE TP310S ASTM A312
- SS SMLS PIPE TP316Ti ASTM A312
- SS SMLS PIPE TP316L ASTM A312
- SS SMLS PIPE TP316 ASTM A312
- SS SMLS PIPE TP304L ASTM A312
- SS SMLS PIPE TP304 ASTM A312
TP304 Stainless Steel Seamless Pipe Suppliers | China Factory | Fast Delivery Available
Introduction
ASTM A312 TP304 seamless pipes are widely recognized as the industry standard for high-performance applications requiring exceptional durability and versatility. Composed of 18% chromium and 8% nickel, these pipes form a stable austenitic structure, delivering unmatched resistance to corrosion, oxidation, and pitting in harsh environments.
Key Features
High-Temperature Stability
Maintains mechanical integrity at temperatures up to 870°C (1600°F), ideal for heat exchangers, boilers, and steam systems.
Seamless Construction
Eliminates weld seams, ensuring uniform strength and reduced risk of leakage under high-pressure conditions (up to 515 MPa tensile strength).
Broad Compatibility
Compliant with ASTM A312, ASME B36.19, and EN standards, suitable for chemical, pharmaceutical, and food-grade applications.
Product Data
Standard: ASTM A312/A312M
O.D: 1/8" NB TO 32" NB , (10.29MM-812.80MM) ,(Customization Available)
W.T: SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS, (Customization Available)
Application:
- Chemical Industries
- Thermal & Nuclear Power Plants
- Fertilizer Plant
- Aerospace
- Food & Dairy Plants
- Paper Industries
- Oil & Gas Exploration
- Desalination Plant
- Pharmaceutical Plant
End: Plain End, Beveled End, Threaded
Processing: Cut-to-length; Polishing.
Inspection:
- 100% PMI TESTED
- EN10204.3.1B MILL TEST CERTIFICATE
- THIRD PARTY INSPECTION ACCEPTED
Delivery Condition: Cold Drawn, Annealed and Pickled/ Polished /Bright Annealed/ Sand blasting/ Shot Blasting.
Marking: All SS SMLS Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per the customer’s request)
Packing: Packed in Wooden Boxes, plywood cases, Steel Strips Bundled, or as per Customers Requests
Specials: Sizes and Specifications other than above can be customized on request.
Specification Parameters
TP304 Chemical Composition
| HEAT NO. | CHEMICAL COMPOSITION (%) | ||||||||
| C | Mn | P | S | Si | Ni | Cr | Mo | ||
| STAND. | MIN. | 8.00 | 18.00 | ||||||
| MAX. | 0.080 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.00 | ||
TP304 Mechanical Properties
| Mechanical Properties | |||||
| Grade | Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness | |
| Rockwell B (HR B) |
Brinell (HB) |
||||
| TP304 | 515 | 205 | 35 | 90 | 187 |
Equivalent Grades - (ASTM A312 TP304 Equivalent Grades)
| ASTM A312 TP304 Equivalent Grades | ||||||||||||
| USA (ASTM / AISI) |
Germany (DIN, WNr) |
Japan (JIS) |
France (AFNOR) |
England (BS) |
Euronorms (EN) |
Italy (UNI) |
Spain (UNE) |
China (GB) |
Sweden (SS) |
Poland (PN) |
Czech Republic (CSN) |
Austria (ONORM) |
| 304 304H S30400 |
1.4301 1.5301 X5CrNi18-10 X5CrNi18-9 X6CrNi18-9 |
SUS304 | 304F00 X5CN18-10 Z4CN19-10FF Z5CN17-08 Z6CN18-09 Z7CN18-09 |
304S11 304S15 304S16 304S16 304S17 304S18 304S25 304S31 |
1.4301 1.4948 X5CrNi18-10 X6CrNi18-10 |
X3CrNi18-10 X5CrNi18-10 |
F.3504 F3551 X5CrNi18-10 |
0Cr19Ni9 0Cr18Ni9 |
2332 2333 |
0H18N9 | 17240 | X5CrNi18-10OS |
ASTM A312/A312M Standard Cold Machining Size Deviation Permitted
| ASTM A312/A312M-09 Standard Permitted Tolerance of WT and OD | |||||
| Nominal Outside Diameter | Allowable deviation | Nominal wall thickness | Allowable deviation | ||
| 1/8”—1 1/2“ | (10.29—48.26) | +0.4 -0.8 | 1/8”—1 1/2“ | (10.29-73.03) all of t | +20 -12.5 |
| >1 1/2“—4” | (48.26—114.3) | ±0.8 | 3“—18” | (88.9-457.2) t/D=5% | +22.5 -12.5 |
| >4”—8" | (114.3—219.08) | +1.6 -0.8 | 3“—18” | (88.9-457.2) t/D>5% | +15 -12.5 |
| >8“—18" | (219.08—457.2) | +2.4 -0.8 | ≥20" | =508 t of wld pipe | +17.5 -12.5 |
| >18”—26“ | (457.2—660.4) | +3.2 -0.8 | ≥20" | =508 t/D=5% | +22.5 -12.5 |
| >26”—34” | (660.4—863.6) | +4.0 -0.8 | ≥20" | =508 t/D>5% | +15 -12.5 |
| >34“—48" | (863.6—1219.2) | +4.8 -0.8 | |||
| Thin wall pipe (t/D=3%) ovality condition: Any cross section in a steel pipe Dmax Dmin=1.5% nominal, and (Dmax Dmin)/ 2 conforms to the stipulated diameter tolerance range. | |||||
Comparison Table of American Standard Dimensions - (ANSI B36.19 & ANSI B36.10)
| OD DN | IN | OD MM | ANSI B36.19 | ANSI B36.10 | |||||||||||||||||
| Nominal diameter in inches | |||||||||||||||||||||
| 5s | 10s | Sched.40s | Sched.40 | Sched.80s | Sched.80 | 10 | 20 | 30 | Standard | ||||||||||||
| mm | Kg/m | mm | Kg/m | mm | Kg/m | mm | mm | Kg/m | mm | mm | Kg/m | mm | Kg/m | mm | Kg/m | mm | Kg/m | ||||
| 6 | 1/8" | 10.29 | - | - | 1.24 | 0.281 | 1.73 | 371 | 1.73 | 2.41 | 0.467 | 2.41 | - | - | - | - | - | - | 1.73 | 0.371 | |
| 8 | 1/4" | 13.72 | - | - | 1.65 | 0.499 | 2.24 | 0.644 | 2 | 3.02 | 0.809 | 3.02 | - | - | - | - | - | - | 2.24 | 0.644 | |
| 10 | 3/8" | 17.14 | - | - | 1.65 | 0.64 | 2.31 | 0.858 | 2.31 | 3.2 | 1.118 | 3.2 | - | - | - | - | - | - | 2.31 | 0.858 | |
| 15 | 1/2" | 21.34 | 1.65 | 0.814 | 2.11 | 1.016 | 2.77 | 1.26 | 2.77 | 3.73 | 1.62 | 3.73 | - | - | - | - | - | - | 2.77 | 1.26 | |
| 20 | 3/4" | 26.67 | 1.65 | 1.034 | 2.11 | 1.298 | 2.87 | 1.68 | 2.87 | 3.91 | 2.19 | 3.91 | - | - | - | - | - | - | 2.87 | 1.68 | |
| 25 | 1" | 33.4 | 1.65 | 1.312 | 2.77 | 2.125 | 3.38 | 2.5 | 3.38 | 4.55 | 3.23 | 4.55 | - | - | - | - | - | - | 3.36 | 2.5 | |
| 32 | 1 1/4" | 42.16 | 1.65 | 1.674 | 2.77 | 2.732 | 3.56 | 3.38 | 3.56 | 4.85 | 4.46 | 4.85 | - | - | - | - | - | - | 3.56 | 3.38 | |
| 40 | 1 1/2" | 48.26 | 1.65 | 1.926 | 2.77 | 3.155 | 3.68 | 4.05 | 3.68 | 5.08 | 5.4 | 5.08 | - | - | - | - | - | - | 3.68 | 4.05 | |
| 50 | 2" | 60.32 | 1.65 | 2.424 | 2.77 | 3.992 | 3.91 | 5.43 | 3.91 | 5.54 | 7.47 | 5.54 | - | - | - | - | - | - | 3.91 | 5.43 | |
| 65 | 2 1/2" | 73.02 | 2.11 | 3.747 | 3.05 | 5.345 | 5.16 | 8.62 | 5.16 | 7.01 | 11.4 | 7.01 | - | - | - | - | - | - | 5.16 | 8.62 | |
| 80 | 3" | 88.9 | 2.11 | 4.585 | 3.05 | 6.557 | 5.49 | 11.28 | 5.49 | 7.62 | 15.25 | 7.62 | - | - | - | - | - | - | 5.49 | 11.28 | |
| 90 | 3 1/2" | 101.6 | 2.11 | 5.272 | 3.05 | 7.526 | 5.74 | 13.56 | 5.74 | 8.08 | 18.62 | 8.08 | - | - | - | - | - | - | 5.74 | 13.56 | |
| 100 | 4" | 114.3 | 2.11 | 5.945 | 3.05 | 8.496 | 6.02 | 16.06 | 6.02 | 8.56 | 22.29 | 8.56 | - | - | - | - | - | - | 6.02 | 16.06 | |
| 125 | 5" | 141.3 | 2.77 | 9.639 | 3.4 | 11.74 | 6.55 | 21.76 | 6.55 | 9.52 | 30.92 | 9.52 | - | - | - | - | - | - | 6.55 | 21.76 | |
| 150 | 6" | 168.28 | 2.77 | 11.514 | 3.4 | 14.037 | 7.11 | 28.23 | 7.11 | 10.97 | 42.52 | 10.97 | - | - | - | - | - | - | 7.11 | 28.23 | |
| 200 | 8" | 219.08 | 2.77 | 15.049 | 3.76 | 20.334 | 8.18 | 42.49 | 8.18 | 12.7 | 64.57 | 12.7 | - | - | 6.35 | 33.28 | 7.04 | 36.8 | 8.18 | 42.4 | |
| 250 | 10" | 273.05 | 3.4 | 23.028 | 4.19 | 28.29 | 9.27 | 60.24 | 9.27 | 12.7 | 81.46 | 15.09 | - | - | 6.35 | 41.7 | 7.8 | 51 | 9.27 | 60.24 | |
| 300 | 12" | 323.85 | 3.96 | 31.806 | 4.57 | 36.633 | 9.52 | 73.76 | 10.31 | 12.7 | 97.36 | 17.48 | - | - | 6.35 | 49.68 | 8.38 | 65.14 | 9.52 | 73.76 | |
| 350 | 14" | 355.6 | 3.98 | 34.99 | 4.78 | 42.102 | 9.52 | - | 11.13 | - | - | 19.05 | 6.35 | 54.63 | 7.92 | 67.98 | 9.52 | 81.21 | 9.52 | 81.21 | |
| 400 | 16" | 406.4 | 4.19 | 42.35 | 4.78 | 48.22 | 9.52 | - | 12.7 | - | - | 21.44 | 6.35 | 62.58 | 7.92 | 77.9 | 9.52 | 93.13 | 9.52 | 93.18 | |
| 450 | 18" | 457.2 | 4.19 | 47.7 | 4.78 | 54.3 | 9.52 | - | 14.27 | - | - | 23.82 | 6.35 | 70.5 | 7.92 | 87.8 | 11.13 | 122.12 | 9.52 | 105.05 | |
| 500 | 20" | 508 | 4.77 | 60.32 | 5.54 | 69.766 | 9.52 | - | 15.09 | - | - | 26.19 | 6.35 | 78.47 | 9.52 | 116.97 | 12.7 | 155 | 9.52 | 116.97 | |
| 550 | 22" | 558.8 | 4.77 | - | 5.54 | - | 9.52 | - | - | - | - | 28.58 | 6.35 | 86.42 | 9.52 | 128.89 | 12.7 | 170.86 | 9.52 | 128.89 | |
| 600 | 24" | 609.6 | 5.54 | 84.1 | 6.35 | 96.215 | 9.52 | - | 17.48 | - | - | 30.96 | 6.35 | 96.215 | 9.52 | 140.8 | 14.7 | 209.54 | 9.52 | 140.81 | |
| 650 | 26" | 660.4 | - | - | - | - | 9.52 | - | - | - | - | - | 7.92 | 127.58 | 12.7 | 202.65 | - | - | 9.52 | 152.73 | |
| 700 | 28" | 711.2 | - | - | - | - | 9.52 | - | - | - | - | - | 7.92 | 137.52 | 12.7 | 218.54 | 15.88 | 271.94 | 9.52 | 164.65 | |
| 750 | 30" | 762 | 6.35 | 120.59 | 7.92 | 147.45 | 9.52 | - | - | - | - | - | 7.92 | 147.45 | 12.7 | 234.44 | 15.88 | 291.81 | 9.52 | 176.57 | |
| 800 | 32" | 812 | - | - | - | - | 9.52 | - | 17.48 | - | - | - | 7.92 | 157.39 | 12.7 | 250.33 | 15.88 | 311.67 | 9.52 | 188.5 | |
| 850 | 34" | 863.6 | - | - | - | - | 9.52 | - | 17.48 | - | - | - | 7.92 | 167.32 | 12.7 | 266.22 | 15.88 | 331.54 | 9.52 | 200.42 | |
| 900 | 36" | 914.4 | - | - | - | - | 9.52 | - | 19.05 | - | - | - | 7.92 | 177.26 | 12.7 | 282.18 | 15.88 | 351.41 | 9.52 | 212.34 | |
Frequently Asked Questions
Q
What are the main chemical components of ASTM A312 TP304 seamless pipes?
ASTM A312 TP304 seamless pipes contain a minimum of 18.00% Chromium (Cr) and 8.00% Nickel (Ni) to form a stable austenitic structure, which provides high resistance to corrosion and oxidation.
Q
What is the maximum temperature limit for TP304 seamless pipes?
These pipes maintain their mechanical integrity and stability at temperatures up to 870°C (1600°F), making them highly suitable for heat exchangers, boilers, and steam systems.
Q
In which industries are these pipes commonly used?
They are widely used in chemical industries, thermal & nuclear power plants, fertilizer plants, aerospace, food & dairy plants, paper industries, oil & gas exploration, desalination plants, and pharmaceutical plants.
Q
What standard inspections do these pipes undergo?
The pipes undergo 100% PMI (Positive Material Identification) testing and come with an EN10204.3.1B Mill Test Certificate. Third-party inspections are also accepted.
Q
What are the available delivery and surface conditions?
They can be delivered in various conditions, including Cold Drawn, Annealed and Pickled, Polished, Bright Annealed, Sand blasting, or Shot Blasting, depending on customer requirements.
Q
How are the pipes packaged for shipment?
Pipes are typically packed in wooden boxes, plywood cases, bundled with steel strips, or packaged according to specific customer requests to prevent damage during transport.