ASTM A269 TP304 / 304L Stainless Steel Coil Tubing

GNEE's A269 TP304 large-diameter coiled tubing is a high-performance, corrosion-resistant heat transfer component manufactured from austenitic stainless steel and available in spiral or custom shapes. Its large diameter and Type 304 stainless steel construction make it ideal for handling high flow rates, resisting clogging, and operating in corrosive or sanitary environments.

 

Our ASTM A269 TP304 / 304L Stainless Steel Coil Tubing sizes include outer diameters of 6.35-25.4 mm and wall thicknesses of 0.5-1.2 mm, held to tight tolerances (OD ±0.05 mm, wall thickness ±0.03 mm). It is designed for critical marine systems such as seawater cooling circuits, hydraulic piping, and instrumentation, where high corrosion resistance, surface cleanliness, and dimensional accuracy are essential.

 

All products come with a factory test certificate (EN 10204 3.1) and an optional third-party corrosion test report, ensuring compliance with maritime industry standards and long-term service in seawater and humid conditions.

ASTM A269 Chemical Composition % Max

Material	C	Mn	P	S	Si	Cr	Ni	Mo	N B	Nb	Ti
TP304	0.08	2.00	0.045	0.030	1.00	18.0-20.0	8.0-11.0	^	^	^ .	^
TP304L	0.035	2.00	0.045	0.030	1.00	18.0-20.0	8.0-12.0	^	^	^	^

 

ASTM A269 Grade TP304L Bright Annealed Tubes Mechanical Properties

Material	Heat treatment	Temperure F (C) Min.	Hardness
			Brinell	Rockwell
TP304	Solution	1900 (1040)	192HBW/200HV	90HRB
TP304L	Solution	1900 (1040)	192HBW/200HV	90HRB

 

Application

ASTM A269 TP304/304L seamless tubes are widely used in heat exchanger systems across various industries, including chemical processing (for handling corrosive fluids such as acids and alkalis), power generation (in steam generators and waste heat boilers), HVAC systems, and marine engineering (for seawater heat exchangers).

 

Important Considerations for Selection

When specifying an A269 TP304 Large Diameter Tube Coil, you must define:

Diameter and Wall Thickness: e.g., 1.5" OD x 1.4" ID, Schedule 10S.

Material Grade: Strongly recommend TP304L over TP304 for welded coils.

Coil Dimensions: Overall diameter, height, pitch between coils.

Design Pressure and Temperature: The maximum operating conditions.

Connections: Type, size, and location of headers and fittings.

Surface Finish: For sanitary applications, a specific Ra (roughness average) like a 2B mill finish or an electropolished finish may be required.

 

If you have any questions about any of the above items, please feel free to place an order. GNEE has a large inventory of popular products for you to choose from. These products can be processed into a variety of practical forms. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive pricing and excellent service.

Material Grade:

American Standard	Austenitic Steel: TP304,TP304L,TP304H, TP304N, TP310S,TP316,TP316L,TP316Ti,TP316H, TP317,TP317L, TP321, TP321H,TP347, TP347H,904L… Duplex Steel : S32101,S32205,S31803,S32304,S32750, S32760 Others:TP405,TP409, TP410, TP430, TP439,...
Europen Standard	1.4301,1.4307,1.4948,1.4541,1.4878,1.4550,1.4401,1.4404,1.4571,1.4438, 1.4841,1.4845,1.4539,1.4162, 1.4462, 1.4362, 1.4410, 1.4501
Gost Standard	08Х17Т,08Х13,12Х13,12Х17,15Х25Т,04Х18Н10,08Х20Н14С2, 08Х18Н12Б,10Х17Н13М2Т,10Х23Н18,08Х18Н10,08Х18Н10Т, 08Х18Н12Т,08Х17Н15М3Т,12Х18Н10Т,12Х18Н12Т,12Х18Н9, 17Х18Н9, 08Х22Н6Т, 06ХН28МДТ