ASTM A213 TP304 Stainless Steel Seamless Boiler Tube U-bending Available
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As one of the largest suppliers of seamless 304 stainless steel pipe, GNEE offers competitive pricing on our 304 stainless steel pipe. We typically supply it in round form. While suitable for high-temperature applications, 304 stainless steel seamless round pipe can also be used at room temperature and under normal atmospheric conditions.
Under normal conditions, the pipe is also resistant to natural acids. The SA213 grade covers both ferritic and austenitic stainless steel materials. Our 304 stainless steel seamless pipe can be used in boilers, heat exchangers, condensers, and superheaters. SA213 TP 304 welded pipe is easy to weld, as 304 stainless steel ERW pipe is welded using electric fusion welding.
The primary manufacturing processes for ASTM A213 TP 304 seamless pipe include cold rolling, cold drawing, heat treatment, and pickling. Seamless pipe manufacturing must comply with ASTM A213 specifications, and product analysis is provided by test and inspection certificates. Please contact us for more details.


Specification of ASTM A213 TP304 Tube
| Specification | ASTM A213 TP304 / ASME SA213 TP304 Tube |
| Shapes | Hydraulic, Round, Rectangular, Honed Tubes, Square, Straight, U Shape, Coiled, Pan Cake Coils |
| Thickness Range | SCH XXS, SCH 5, SCH 40, SCH XS, SCH 10, SCH 160, SCH XXH, SCH 80S, SCH 80 |
| Surface Finish | 400G, 500G, BA, 2B, No.1, Mirror Polished, No.8, No.4, No.3, 8K, 2D, 1D, 600G or 800G Mirror finish Tubing, 180G, 320G, HL, 400G Satin/ Hairline or Custom Finish as per customer's specification |
| Manufacturing Type | CDS / CDW / DOM / abricated / Seamless / Welded / ERW / CEW / 100% X Ray Welded |
| Standard | GB, JIS, DIN, ASTM, AISI, EN, SUS |
| Technique | Cold rolled, Extrusion, Cold drawn, Hot rolled Tube |
| Delivery Condition | Polished, Annealed and Pickled (AP), MF, Cold Drawn, Bright Annealed (BA) |
| Processing Service | Bending, Cutting, Decoiling, Punching, Welding, Moulding |
| End | Plain End, Treaded, Beveled End |
ASTM A213 TP304 seamless stainless steel Tubing Chemical composition
| Element | TP304, % | TP304L, % |
| C | ≤0.08 | ≤0.035 |
| Mn | ≤2.00 | ≤2.00 |
| P | ≤0.045 | ≤0.045 |
| S | ≤0.030 | ≤0.030 |
| Si | ≤1.00 | ≤1.00 |
| Cr | 18.0-20.0 | 18.0-20.0 |
| Ni | 8.0-11.0 | 8.0-12.0 |
Mechanical Properties of SA213 Grade 304 SS Tube
| Grade | Tensile Strength(Mpa) | Yield Point(Mpa) | Elongation(%) | Hardness(HRB) | Solution Temperature |
| TP304 | 515 | 205 | 35 | 90 | 1040 |
Equivalent Material Of Stainless Steel 304 Boiler Tube
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 304 |
ASTM A213 Permissible Variations In Outside Diameter, Wall Thickness And Length
| OD, mm | W.T. mm | L, mm | |
|---|---|---|---|
| ≤25.4 | ±0.10 | +20%, 0%, OD>50, T>5.6 AVG wall +/-10% |
OD<50.8,+3mm, OD>=50.8, +5mm |
| 25.4~38.1 | ±0.15 | ||
| 38.1~50.8 | ±0.2 | ||
| 50.8~63.5 | ±0.25 | ||
| 63.5~76.2 | ±0.3 | ||
| 76.2~101.6 | ±0.38 | ||
GNEE Stainless produces stainless steel seamless tube complying with the quality system, records each stage, and ensures every process is correct following A213 specification, all the tests should be done according to standards and requirements, mill test certificate (MTC) will be offered as EN10204 – 3.1 type.


Surface Treatment
The 304 Stainless Steel Tube undergoes pickling and passivation to remove surface scale and impurities, forming a dense passivation film and enhancing corrosion resistance. Surface finishing options such as wire drawing and polishing are also available upon request.
GNEE has nearly 18 years of experience in seamless stainless steel pipe production. Every pipe undergoes dimensional, surface, PMI, eddy current, and hydrostatic tests. Only high-quality pipe is packaged and delivered to customers worldwide. Our pipe offerings cover both imperial and metric sizes, with outer diameters ranging from 1.58 mm to 108 mm. Special sizes are available upon request. We can provide straight or U-bend pipes up to 30 meters in length. Grades: 304/304L, 304H, 316/316L, 316H, 317L, 321, 310S (2520), 347H, S31803/S32205, S32750, S32760, S32304, 904L
Specifications: ASTM A213, A270, A789, A790, GB/T13296, DIN17458, EN10216-5
Outer Diameter Range: 1.58mm – 108mm
Thickness: 0.38mm – 5.18mm
Length: Maximum 25mm (U-bend compatible)
Surface Treatment: A&P, BA, EP
Email: info@gneestainless.com
ASTM A213 TP 304 Tubes for sale
| ASME SA213 TP304 Instrument Tube | DIN 1.4301 Stainless Steel 304 Sanitary Tube |
| ASTM A 213 304 Stainless Steel Square Tube | SS TP 304 1 inch Tube |
| SA213 TP304 Exhaust Tubing | ASME SA213 TP304 Dom Tubing |
| ASTM A213 TP 304 Rectangular Tube | ASTM A 213 304 Stainless Steel Hydraulic Tubing |
| SA 213 Gr 304 Seamless Tube | SA213 TP304 Round Tube |
| 304 Stainless Steel Electropolished Tube | ASTM A213 TP 304 12mm Tube |
| SS 304 High Pressure Tubing | 304 Stainless Steel Heat exchanger Tube |
Packaging: Packed in waterproof paper and steel strapping, in line with standard export sea freight packaging requirements, suitable for various modes of transportation, or customized according to customer requirements.








