ASME SA213 TP321 BA Tube For Pharmaceutical Industries

what is ASME SA213?
ASME SA213 is an ASME standard specification covering seamless ferritic and austenitic alloy-steel tubes for applications in boilers, superheaters, and heat exchangers.

ASME SA213 TP321 bright-annealed stainless steel pipe is a high-standard seamless austenitic stainless steel pipe used in critical equipment such as boilers and pressure vessels.

ASME SA213 TP321 stainless steel pipe undergoes a bright annealing (BA) process, resulting in a surface free of scale and decarburization, forming an extremely pure, dense, and uniform chromium passivation film. This provides superior corrosion resistance to ASME SA213 TP321 pickled pipe. Furthermore, its smooth, flawless surface resists the adhesion and residue of contaminants, making it easy to clean and disinfect.
ASME SA213 TP321 bright-annealed pipe is widely used in critical equipment such as power plant boilers, the petrochemical industry, and the food and pharmaceutical industries, where material properties and surface finish are extremely demanding.

SA213 TP321 bright-annealed stainless steel pipe

Application

Boiler superheater/reheater tubes
Economizer tube bundles
U-tube heat exchangers (TEMA standard)
Hydrogenation reactor feed/discharge lines
Auxiliary steam generator tube bundles
High-temperature molten salt heat exchangers (solar thermal power generation)

Specification

ASTM A213 SS 321 Equivalent:

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
SS 321	S32100	321S31	58B, 58C	1.4541	X6CrNiTi18-10	2337	SUS 321

Chemical Composition

Grade	C	Mn	Si	P	S	Cr	N	Ni	Ti
SS 321	0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 19.00	0.10 max	9.00 - 12.00	5(C+N) – 0.70 max

Mechanical Properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
321	515	205	40	95	217

Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Co-eff of Thermal Expansion (µm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Elec Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	At 100°C	At 500°C
321	8027	193	16.6	17.2	18.6	16.1	22.2	500	72

GNEE offers ASME SA213 TP321 BA (bright annealed) tubing for the pharmaceutical industry. This tubing features a bright annealed surface finish (Ra ≤ 0.4μm) and meets USP Class VI and FDA cleanliness standards. Available in standard pharmaceutical sizes (OD 12.7-50.8mm) and wall thickness 0.6-1.65mm, it is held to tight tolerances (OD ±0.05mm, wall thickness ±0.03mm) to ensure optimal corrosion resistance in high-purity water and pharmaceutical fluid systems, sterilization compatibility up to 121°C, and dimensional stability under repeated autoclave cycles.

All of this is backed by GNEE's material certification (including factory test reports and third-party USP/EP compliance testing) and fast stock delivery to meet cGMP production requirements.

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