Boiler Seamless Stainless Steel Tube with OD 6-127mm, WT 0.5-12mm and ISO9001 Approval for Heat-Exchanger Service
Price:
800-1000 USD/Ton
MOQ:
1Ton
Delivery Time:
45-50 work days
Brand:
TORICH
Product Description
Boiler Seamless Stainless Steel Tube OD 6-127mm WT 0.5-12mm ISO9001 Approval
Boiler seamless stainless steel tubes in OD 6-127 mm and WT 0.5-12 mm are supplied for pressure-bearing heat-transfer service, especially boiler, superheater, condenser, and heat-exchanger tube bundles. The product range matches the typical ASTM A213 scope, which covers seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes, with commonly supplied sizes up to 5 in. / 127 mm OD and 0.015-0.500 in. / 0.4-12.7 mm wall thickness. Production can be hot-finished or cold-finished, with final heat treatment and inspection arranged according to the purchase standard and project specification. ISO 9001:2015 quality-management documentation can be supplied where the manufacturing mill is certified under an approved QMS.
Specifications
| Item | Specification |
|---|---|
| Material | Seamless austenitic stainless steel tube for boiler and heat-exchanger service |
| Main Standard | ASTM A213 / ASME SA213; optional EN 10216-5, JIS G3463, GB/T 13296, GOST 9940 / GOST 9941 |
| Grades | TP304, TP304H, TP316, TP316L, TP321; other grades available by order |
| Outside Diameter | 6-127 mm |
| Wall Thickness | 0.5-12 mm |
| Length | 1-12 m, fixed length or random length; custom cut length available |
| Tolerance Range | Cold-finished OD: D < 25 mm ±0.10 mm; 25 ≤ D ≤ 40 mm ±0.15 mm; 40 < D < 50 mm ±0.20 mm; 50 ≤ D < 65 mm ±0.25 mm; 65 ≤ D < 75 mm ±0.30 mm; 75 ≤ D ≤ 100 mm ±0.38 mm; 100 < D ≤ 127 mm +0.38 / -0.64 mm. Average wall tolerance: ±10% for cold-formed tubes or ±12.5% for hot-formed tubes when average wall is specified. |
| Straightness | Precision straightened to ≤1.5 mm/m when specified; project drawing tolerance can be agreed before production |
| Surface Condition | Annealed and pickled; bright annealed, OD/ID polished, or mechanically cleaned surface available by order |
| Heat Treatment | Austenitic grades supplied solution annealed; typical minimum solution temperature 1040°C, followed by water quenching or rapid cooling |
Dimensional and wall-thickness tolerances vary by hot-finished or cold-finished route and by whether minimum wall or average wall is ordered. ASTM A213 inspection also requires tension, hardness, flattening, flaring, and either hydrostatic or nondestructive electric testing.
Main Characteristics
- Pressure-service seamless structure: tubes are produced by the seamless process and are specified by OD and wall thickness, not by pipe NPS schedule, which makes them suitable for tube-sheet expansion, U-bending, and heat-transfer bundle fabrication.
- Controlled high-temperature grade selection: TP304H has a carbon range of 0.04-0.10% for improved creep-rupture performance compared with standard TP304; TP316 / TP316L contain 2.0-3.0% Mo for improved chemical and chloride-bearing service; TP321 uses titanium stabilization for intergranular-corrosion resistance after elevated-temperature exposure.
- Defined minimum mechanical performance: TP304, TP304H, and TP316 have minimum tensile strength of 515 MPa, minimum yield strength of 205 MPa, and minimum elongation of 35%; TP316L has minimum tensile strength of 485 MPa, minimum yield strength of 170 MPa, and minimum elongation of 35%.
- Solution-annealed corrosion resistance: common austenitic grades are solution annealed at a minimum of 1040°C and rapidly cooled, helping restore corrosion resistance after forming and reduce carbide precipitation risk.
Our Advantages
| Professional Buyer Concern | Our Solution |
|---|---|
| How can the buyer confirm the tube is ASTM A213 / SA213 boiler tubing, not general-purpose stainless tubing? | Each order can be supplied with heat number traceability, chemical analysis, mechanical test results, heat-treatment record, and hydrostatic or NDE inspection report. ASTM A213 is specifically for boiler, superheater, and heat-exchanger tubes, while general tubing standards are not equivalent for pressure heat-transfer service. |
| Will the OD and wall tolerance fit tube sheets, baffles, and U-bending operations? | For cold-finished tubes, OD tolerance can be controlled from ±0.10 mm on small diameters up to +0.38 / -0.64 mm on larger sizes within this product range. Average wall tolerance can be specified as ±10% for cold-formed tubes, supporting predictable expansion and bending behavior. |
| Which grade should be selected for corrosion, welding, or high-temperature duty? | TP316 / TP316L is recommended where Mo-bearing corrosion resistance is required; TP316L is used when lower carbon is preferred for welded assemblies; TP304H is used where higher creep strength is required; TP321 is selected where titanium stabilization is needed for elevated-temperature intergranular-corrosion resistance. |
Execution Standards
| Standard System | Applicable Standard | Scope |
|---|---|---|
| ASTM / ASME | ASTM A213 / ASME SA213 | Seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes |
| EN | EN 10216-5 | Seamless stainless steel tubes for pressure and corrosion-resisting purposes at room, low, or elevated temperatures |
| GOST | GOST 9940 / GOST 9941 | Hot-deformed or cold / warm-deformed seamless corrosion-resistant stainless steel tubes, subject to grade equivalence |
| JIS | JIS G3463 | Stainless steel tubes for boiler and heat exchanger service |
| GB | GB/T 13296-2023 | Seamless stainless steel tubes for boiler and heat exchanger service |
Relevant public standard summaries identify EN 10216-5 as seamless stainless tubes for pressure purposes, JIS G3463 as stainless steel tubes for boiler and heat exchanger use, and GB/T 13296-2023 as seamless stainless steel tubes for boiler and heat exchanger service.
Application Field
Specific product: U-bend tube bundle for shell-and-tube boiler feedwater heaters.
Chemical Composition
The following values are standard composition limits commonly used for ASTM A213 / ASME SA213 austenitic stainless boiler and heat-exchanger tube grades. Final acceptance should be based on the mill test certificate and the ordered standard revision.
| Grade | UNS | C | Mn | P | S | Si | Cr | Ni | Mo | Ti / Other | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TP304 | S30400 | ≤0.080 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0-20.0 | 8.0-11.0 | -- | -- | Balance |
| TP304H | S30409 | 0.04-0.10 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0-20.0 | 8.0-11.0 | -- | -- | Balance |
| TP316 | S31600 | ≤0.080 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | -- | Balance |
| TP316L | S31603 | ≤0.035 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | -- | Balance |
| TP321 | S32100 | ≤0.080 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0-19.0 | 9.0-12.0 | -- | Ti: 5 × (C + N) to 0.70; N ≤0.10 | Balance |
Mechanical Properties
The following mechanical values are standard minimum requirements for commonly ordered ASTM A213 austenitic grades after appropriate heat treatment.
| Grade | Heat Treatment Condition | Tensile Strength, min MPa | Yield Strength, min MPa | Elongation, min % | Hardness Limit |
|---|---|---|---|---|---|
| TP304 | Solution annealed, min 1040°C | 515 | 205 | 35 | HRB 90 max / HBW 192 max / HV 200 max |
| TP304H | Solution annealed, min 1040°C | 515 | 205 | 35 | HRB 90 max / HBW 192 max / HV 200 max |
| TP316 | Solution annealed, min 1040°C | 515 | 205 | 35 | HRB 90 max / HBW 192 max / HV 200 max |
| TP316L | Solution annealed, min 1040°C | 485 | 170 | 35 | HRB 90 max / HBW 192 max / HV 200 max |
| TP321 | Solution annealed, min 1040°C | 515 for t ≤9.5 mm; 485 for t >9.5 mm | 205 for t ≤9.5 mm; 170 for t >9.5 mm | 35 | HRB 90 max / HBW 192 max / HV 200 max |
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Company
TORICH INTERNATIONAL LIMITED
Location
Suite 1604-3, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact Person
Richard SHEN