ASTM A270 TP304 Durable Stainless Steel Welded Tube

ASTM A 270 Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing.

​​GNEE provides  ASTM A270 TP304 stainless steel welded tubes​​ that are manufactured from ​​304 stainless steel​​ using ​​tungsten inert gas welding (GTAW) or plasma welding​​ processes. The tubes undergo ​​bright annealing (BA) or pickling and passivation treatments​​ to achieve a ​​smooth inner surface (roughness Ra ≤ 0.8 μm) and a uniform, bright silver appearance​​. These tubes offer ​​excellent corrosion resistance​​ (withstanding freshwater and weak acid/alkaline media), along with ​​superior formability and weldability​​, making them ideal for ​​hygiene- and durability-critical applications​​.

We supply ​​ASTM A270 TP304 stainless steel welded tubes​​ in ​​a wide range of standard sizes​​ (e.g., ​​outer diameters from 6.35-114.3 mm and wall thicknesses of 0.5-3.0 mm​​) as well as ​​customized dimensions​​. The tubes feature ​​outer diameter tolerances of ±0.13 mm and wall thickness tolerances of ±10%​​, and support ​​value-added processing services such as cutting and chamfering​​.

 

 

All products undergo ​​multiple quality verifications​​, including ​​eddy current testing (ET), hydrostatic testing (≥10 MPa)​​, and ​​tests for chemical composition and mechanical properties (ensuring tensile strength ≥515 MPa, yield strength ≥205 MPa, and elongation ≥40%)​​, guaranteeing ​​zero leakage and long service life​​. These tubes are specifically designed for use in ​​food and beverage production lines, pharmaceutical water systems, water treatment equipment, and low-pressure fluid conveyance pipelines​​ where ​​hygiene standards, corrosion resistance, and structural durability​​ are paramount. GNEE also provides ​​original factory warranties and third-party inspection reports​​ to ensure ​​high reliability and cost-effectiveness​​.

 

ASTM A270 TP304 Tube Specification

Type	Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing
Outer Diameter	1/2 Inch
Outer Diameter Tolerance	+/-0.005 Inch +/-0.13MM
Standard	ASTM A270 A270M
Wall Thickness	16 Gauge (0.065 Inch)
Length	20 Inch
Wall Thickness Tolerance	+/-10%
Length Tolerance	+1/8 Inch / +3.18 MM
Finish	20Ra Inner Diameter 32Ra Outer Diameter
Polish	Mechanical Polished
Type	Seamless
Certification	Dairy Grade and 3A – Food
Mill Test Certificate	EN10204 3.1

 

ASME SA270 Gr 304L Seamless Tube Chemical Composition

Grade	Carbon	Phosphorus	Manganese	Sulfur	Silicon	Chromium	Nickel
TP304L	0.035	0.045	2	0.03	1	18.0-20.0	8.0-13.0

 

ASME SA270 Type 304L Welded Tube Mechanical Properties

Material	Temperure	Elongation	Tensile Strength	Heat	Yield Strength
	º F(º C)		Ksi (MPa).	Treatment	Ksi (MPa)
TP304L	1900 (1040)	35	70(485)	Solution	25(170)

Application:

The products are applied to trades such as papermaking, chemical industry, shipbuilding, petroleum, electricity, food,

pharmacy, natural gas, metallurgry, architecture, sewage disposal, environmental protection, aerospace, heat exchanger, etc. Extensively.

 

Can TP304 tubes be welded or bent?
Yes. TP304 is highly weldable and formable. Tubes can be TIG, MIG, or plasma welded, and cold or hot bent without cracking. Post-weld pickling or passivation may be applied for maximum corrosion resistance.

 

If you have a project need for 304 stainless steel pipe, we welcome your order. GNEE has a large inventory of popular products for you to choose from. Available in both seamless and welded configurations, contact our factory today for detailed chemical composition and free samples. We offer competitive pricing and excellent service.

 

How are TP304 welded tubes packaged for shipping?

Bundled with moisture-proof wrap

Wooden crates or pallets to prevent damage

Plastic end caps to protect tube edges

Custom packaging available for large or sensitive orders