ASME SA213 TP 321 Heat Exchanger Tubes

The production process of ASTM TP 321 superheater tubes produced by GNEE includes multiple steps, from the selection of raw materials to forming, heat treatment and surface treatment. Each link needs to be strictly controlled during the production process to ensure the quality and performance of the final product. Common production processes include cold drawing, hot rolling, solution treatment, etc. ‌
ASME SA213 TP 321 heat exchanger stainless steel tubes have a wide range of specifications, mainly including outer diameters from 6 mm to 762 mm, wall thicknesses from 0.5 mm to 50 mm, and lengths up to 18000 mm. ‌ These specifications can be customized according to customer needs, and special specifications can also be negotiated for production ‌.

ASTM A213 SS 321 shell tube heat exchanger  Equivalent

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

SS 321 Tube ASTM A213 Tolerances

Specification	Allowable Outside Diameter Variation in mm			Allowable Wall Thickness Variation		Exact Length Tolerance in mm		Testing
	Nominal Diameter	Over	Under	%Over	%Under	Over	Under
ASTM-A213 TP321 Seamless Boiler Superheater and Heat Exchanger Tubes	Under 25.4	.1016	.1016	+20	-0	3.175	0	Flattening Test
	25.4-38.1 incl	.1524	.1524	+22	-0	3.175	0	Tension Test
	38.1-50.8 excl	.2032	.2032	+22	-0	3.176	0	Flare Test
	50.8-63.5 excl	.254	.254	+2	-0	4.46	0	Hardness Test
	63.5-76.2 excl	.3218	.3218	+22	-0	4.76	0	100% Hydrostatic test
	76.2-101.6 incl	.381	.381	+22	-0	4.76	0	Refer to ASTM A-450

Why choose GNEE

GNEE's main stainless steel products have the following specifications: outer diameter 6 - 720mm, wall thickness 1 - 50mm, length 4000mm-13000mm. Product varieties include: 304, 304L, 304H, 321, 321H, 316, 316L, 317L, 310S (2520), 347H, 904L, S32205, S32507, 400, 600, 800 series austenitic stainless steel, duplex steel, super duplex steel and nickel-based alloy products.
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Inspection:
PMI Test
Hydraulic Test
Eddy Current Test
Non-Destructive Test
Etc.

Q.Can you provide samples?
A.Of course, we can provide you with free samples, but customers need to pay the shipping cost.
Q.How long is your delivery time?
A.Specifically, need to consider the quantity and specifications of your order.
Q.Do you have quality control?
A.Yes, we have got BV.SGS certification.