ASTM A249 TP321 stainless steel welded pipe for boiler applications
ASTM A249 TP321 stainless steel welded pipe for boiler applications
ASTM A249 TP321 stainless steel welded pipe is suitable for boilers due to its high-temperature strength and resistance to intergranular corrosion (a benefit of titanium alloy stabilization). The material must meet specific chemical, mechanical, and testing requirements, including solution heat treatment and mechanical testing such as flattening, tensile testing, and hydrostatic/nondestructive testing. Manufactured to welded austenitic steel pipe standards, the pipe is available in a variety of shapes and finishes for applications such as boilers, superheaters, and heat exchangers.
What is the ASTM code for 304 stainless steel pipe?
ASTM A312 TP 304
ASTM A312 TP 304/304L stainless steel pipe is the most widely used and commonly used stainless steel on the market. These grades of stainless steel are austenitic chromium alloys, also known as "18/8" stainless steel because of their composition of 18% chromium and 8% nickel.
TP321 is a special stainless steel material with the following chemical composition and properties:
TP321 is a type 321 stainless steel material containing 17-19% chromium, 9-12% nickel, 2-3% silicon, a minimum of 0.04% phosphorus, 0.30% manganese, and 0.075% niobium.
ASTM A249 TP321 stainless steel heat exchanger tubes offer excellent corrosion resistance, heat resistance, high and low temperature strength, and excellent processability and weldability. They also exhibit excellent corrosion resistance in emergency room water and strong corrosion resistance in vaporized media.
ASTM A249 TP321 stainless steel heat exchanger tubes offer excellent processability and can be stamped and cold worked, with excellent weldability. Due to their high chromium content, TP321 heat exchanger tubes resist high-temperature corrosion and maintain excellent corrosion resistance. TP321 heat exchanger tubes also have relatively strong oxidation resistance, resisting atmospheric corrosion in air and water vapor corrosion in humid air, and exhibiting good resistance to wet heat aging.
Furthermore, TP321 heat exchanger tubes exhibit excellent electromagnetic properties, making them suitable for use in components within the electronics industry, such as power supplies, controllers, signal processors, and magnetoelectric coupling devices.
TP321 stainless steel heat exchanger tubes that meet ASTM A249 standards offer excellent performance and are used in the food processing, chemical, and shipbuilding industries, as well as demanding applications such as automotive parts, components, and heat exchangers.
ASTM A249 TP321 Stainless Steel Welded Heat Exchanger Tube Specification:
| Standards | Welded Tube |
| ASTM | A 249 |
| ASME | SA 249 |
| Dimensional Range: | |
| Product Name | ASTM A249 TP 321 Stainless Steel Welded Tubes |
| Range | 6NB to 1200NB - SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS. |
| In Form of | Round, Square, Rectangle, Oval, Coil, Flexible Pipe, Shaft, 'U' Shape, Hydraulic pipe, Honed Tubes |
| In Length of | Standard & Cut length |
| Special Pipes | Fabricated Pipe (with radiography) |
| Value Added Service | Draw & Expansion as per required Size & Length Polish (Electro & Commercial) Heat Treatment Bending Annealed & Pickled Sand Blasting Machining Etc. |
| Material Grade (AISI /TP) | AISI TP 304, TP 304H, TP 304L, TP 304LN, TP 316, TP 316H, TP 316L, TP 316LN, TP TP 316Ti, TP 309, TP 310, TP 317L, TP 321, TP 347, TP 409, TP 410, TP 420, TP 430, TP 446, TP 202 Etc. |
| 0cr18N9, 00Cr19Ni10, 0Cr25Ni20, UNS31803, S31500, S32750, 2205, 904L Nickel Alloy 600, 625, 800, 825, 718 | |
| TEST CERTIFICATES | MTC, IBR & Third Party Inspection Manufacturer Test Certificate Laboratory Test Certificate from Govt. Approved Lab. Under Third Party Inspection |
| Specialize | Fabricated Pipe Square & Rectangle & Other Odd Size |
| Specification: | ASTM A 269/A 213/ASME SA 213 / EN 10216-5/EN 10305 / NACE MR0175/PED 97/23 EC |
| Maximum service temperature: | 650°C / 1205°F |
ASTM A249 TP321 Stainless Steel Welded Heat Exchanger Tube Chemical details
| Technical composition (%) | Fe | Cr | Ni | Mn | Si | P | C | S | Ti | |
| 321 | min | Bal. | 17 | 9 | - | - | - | - | - | - |
| max | - | 20 | 13 | 2 | 0.75 | 0.03 | 0.08 | 0.04 | 0.04 |
ASTM A249 TP321 Stainless Steel Welded Heat Exchanger Tube Mechanical properties
| Tensile Strength, Mpa | Yield Strength, Mpa | Elongation, % | Hardness, HRB |
| 515 min | 205 min | 35 min | 90 max |
ASTM A249 TP321 Stainless Steel Welded Pipe Applications
Boiler and Pressure Vessel Industry: Used in the manufacture of boiler superheater, reheater, economizer, and evaporator tubes; and heat exchange tube bundles in various pressure vessels.
Petrochemical Industry: Used in refinery heat exchangers, condensers, and piping systems; and process piping for handling corrosive media.
Food and Pharmaceutical Industry: Used in piping and heat exchange equipment requiring extremely high cleanliness levels.
Foam-fired and Nuclear Power Industry: Used in power plant high-pressure feedwater heaters and condensers.
Gnee Steel specializes in the production of a wide range of stainless steel products. Gnee Steel's product packaging includes: Steel Strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during ocean shipping, and then secured with steel strapping. Wooden Cases/Crates: Pipes are typically packaged in wooden cases or crates to protect the pipes during transportation, especially those that are longer or have larger diameters. Seaworthy Export Packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin Packaging: This prevents rain, seawater, and other external factors from penetrating the export crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in the aerospace, chemical, power, automotive, and nuclear energy sectors, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing or customized alloy material solutions, please contact us for a quote: ru@gneesteelgroup.com
