ASTM A249 TP321 Bright Annealed Welded Tube for Heat Exchanger

ASTM A249 specification covers nominal wall thickness welded tubes and heavy cold-worked welded tubes made of austenitic steel. More specifically, ASTM A249 is applicable to tubes used in applications such as boilers, superheaters, heat exchangers, and condensers.

 

ASTM A249 TP321 bright annealed welded tube we supply contains titanium, which enhances the stability of the titanium alloy, providing excellent intergranular corrosion resistance. This property is crucial for maintaining the integrity of the tubing in high-temperature and high-stress environments. The bright annealing surface treatment is achieved by heating the metal in a controlled atmosphere, which softens the material, making it easier to process and resulting in a clean, smooth surface. This process eliminates the need for final pickling or polishing steps. The bright annealed surface is ideal for applications such as heat exchangers, boilers, and superheaters, where corrosion resistance and a clean surface are paramount.

 

 

ASTM A249 TP321 Stainless Steel Welded Heat Exchanger Tube Specification:

Standards	Welded Tube
ASTM	A 249
ASME	SA 249
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.
Maximum service temperature:	650°C / 1205°F

 

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

 

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 Tube Application

Boiler and Pressure Vessel Industry: Used in the manufacture of boiler superheaters, reheaters, economizers, and evaporator tubes; heat exchange tube bundles in various pressure vessels.
Petrochemical Industry: Heat exchangers, condensers, and piping systems in refineries; process piping used to handle corrosive media.
Food and Pharmaceutical Industry: Pipelines and heat exchange equipment requiring extremely high cleanliness requirements.
Thermal and Nuclear Power Industry: High-pressure feedwater heaters and condensers in power plants.

 

GNEE specializes in the production of high-quality stainless steel welded pipes, offering 304, 321, and 316L grades. We offer a comprehensive range of specifications, covering both large and small diameters. Our welded steel pipes are made from high-quality materials and undergo rigorous manufacturing processes, ensuring consistent and reliable quality. Please contact us for a quote! Email: info@gneestainless.com

Packaging and Delivery

Packaging: We use moisture-proof and shock-resistant packaging, and use wooden pallets or plastic wrap for safe transportation.

Delivery Time: Standard delivery time for in-stock products is 7-15 days; custom orders are 20-30 days.

Minimum Order Quantity (MOQ): 500 kg (smaller quantities may be considered for sample orders).

Payment: We accept wire transfers, letters of credit, or flexible payment options for long-term customers.