ASTM A312 TP304 / 304L Stainless Steel Welded Pipe

If you are looking for high-quality stainless steel welded pipes with excellent stability, corrosion resistance, and weldability, we can provide you with ASTM A312 TP304/304L stainless steel pipes, widely used in chemical pipelines, food processing, pharmaceutical equipment, building structures, and general industrial fluid transportation systems.
Our ASTM A312 TP304/304L welded pipes are manufactured using high-quality steel strips, precision forming, and automatic welding processes. The welds are smooth and strong, and the pipes undergo solution annealing, pickling, or polishing treatments to ensure clean and smooth inner and outer surfaces and high dimensional accuracy. Outer diameters range from 10mm to 600mm, and wall thickness and length can be customized to meet the needs of different engineering projects.
304L stainless steel welded pipes offer superior intergranular corrosion resistance, with a corrosion rate of ≤0.003mm/year in neutral media. In terms of quality control, raw materials undergo 100% spectral analysis, welds are subjected to UT/RT non-destructive testing (pass rate ≥99%), and finished products undergo 1.2 times working pressure hydrostatic testing.

For quality control, each batch of products undergoes chemical composition analysis, dimensional tolerance testing, weld quality inspection, and non-destructive testing (UT/PT). Material test reports (MTC), ISO system documents, and third-party inspection reports are available to ensure compliance with ASTM A312 standards.

 

🔹 Composition ranges for 304 grade stainless steel pipe

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
304	min.	-	-	-	-	-	18.0	-	8.0	-
	max.	0.08	2.0	0.75	0.045	0.030	20.0		10.5	0.10
304L	min.	-	-	-	-	-	18.0	-	8.0	-
	max.	0.030	2.0	0.75	0.045	0.030	20.0		12.0	0.10

 

🔹 ASTM A312 TP 304 / 304L Stainless Steel Seamless Pipes and Tubes 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
304	515	205	40	92	201
304L	485	170	40	92	201

 

🔹 ASTM A312 TP 304 / 304L Stainless Steel Tubes Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/0C)			Thermal Conductivity (W/m.K)		Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
			0-1000C	0-3150C	0-5380C	at 1000C	at 5000C
304/L/H	8000	193	17.2	17.8	18.4	16.2	21.5	500	720

 

🔹 Applications

Pharmaceuticals

Power Generation

Petrochemicals Industries

Gas Processing

Marine Industries

Food Processing Industries

Chemical Equipment

Oil & Gas Industries

Heat Exchangers/Boilers/Condensers/Superheaters,etc

 

Inspection & Tests
Visual examination, dimensional inspection, PMI chemical analysis, tensile test, flattening test, bend test, eddy-current test, etching test, radiographic examination (for welded pipes), intergranular corrosion test (upon request).

 

 

🔹Value Added Services of 304 Stainless Steel Pipes

304, 304L Stainless Steel Pipe Polishing
Heat Treatment, Annealing, Pickling of 304, 304L Pipes
Ultrasonic Testing of 304L Pipes
100% X-Ray Welding for 304L Large Diameter Custom Size Stainless Steel Pipes
Stainless Steel 304, 304L Pipe Beveling
Cold Drawing Services
Special Testing Requirements – Destructive Testing, Non Destructive Testing etc.

 

🔹 Packaging and Delivery

Item	Details
Price Terms	FOB, CFR, CIF (as per Incoterms® 2020)
Package	Waterproof paper, edge protection, wooden pallets or crates
Loading Port	Tianjin, Qingdao, Shanghai, or any major Chinese seaport
Container Capacity	1×20ft: Max 25 Tons, Max 5.8m length 1×40ft: Max 25 Tons, Max 11.8m length
Delivery Time	7–15 working days depending on order quantity