ASTM A312 TP304L stainless steel thick-walled seamless pipe

ASTM A312 TP304L is a stainless steel pipe specification made from a low-carbon version of the widely used 304 austenitic stainless steel. The lower carbon content improves weldability and resistance to intergranular corrosion. It is available in seamless, welded, and electric resistance welded (ERW) forms, suitable for a variety of applications ranging from low-pressure pipelines to high-temperature systems.

 

GNEE offers high-quality ASTM A312 TP304L seamless pipes, which are made from ultra-low carbon austenitic stainless steel (carbon content ≤ 0.03%), superior to standard TP304. TP304/TP304L seamless pipes are manufactured using cold drawing or hot rolling processes, without welding at any stage of production. Welded pipes are manufactured using automatic welding processes without the addition of filler metal. Pipes are available with plain ends, beveled ends, or threaded ends conforming to ASME B1.20.1.

ASTM A312 TP304L stainless steel round pipes are available in a wide range of sizes, with outside diameters ranging from 6.0 mm to 610 mm (1/4 inch to 24 inches) and wall thicknesses ranging from 0.5 mm to 25.4 mm (1/50 inch to 1 inch). Customized sizes are available to meet the design requirements of various industrial piping systems, including large diameter, thin-walled, and thick-walled pipes.

 

Before shipment, TP304L steel pipes must undergo hydrostatic testing to verify their overall strength and leak-tightness, ensuring they will not leak or rupture under working pressure. Eddy current testing can also be used as an alternative to hydrostatic testing upon request. Ultrasonic testing or radiographic testing can be selected if other tests are required by the customer.

 

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Chemical Composition

Grade	UNS	C	Mn	P	S	Si	Cr	Ni
TP304L	S30403	0.035 max	2.00 max	0.045 max	0.03 max	1.00 max	18.0-20.0	8.0-13.0

Mechanical Properties

 

Material	Heat Treatment	Temperure Min.ºF(ºC)	Tensile Strength Ksi (MPa), Min.	Yield Strength Ksi (MPa), Min.	Elongation %, Min
TP304L	Solution	1900 (1040)	70(485)	25(170)	35

 

Stainless Steel Solution Heat Treating Condition

ASTM A312
Grade	Annealing Requirement
TP304	1040℃min., Water Quenching
TP304L
TP316
TP316L

 

Calculating Formula for the Value of Mass for Stainless Steel ASTM A312 & Pipe

Grade					Basic Mass (kg/mm m2)			Formula
304TP TP304 304L1TP 304L2TP TP304L					7,93			W=0.02491t(D-t)
316TP TP316 316L1TP 316L2TP TP316L					7,98			W=0.02507t(D-t)

 

ASTM A312 Stainless Steel Pipe Dimension

Materials	Outer Diameter	Wall Thickness	Length	Standard
Austenitic Duplex Steel Nickel Alloy Cobalt Alloy Ferrite	8-711mm DN6-DN700 1/8"-28"	1-50mm Sch5s -SchXXS	≤12m	ASTM-A312 ASTM-A790 ASTM-A269 ASTM-B167/163 ASTM-B444 ASTM-B622 ASTM-B423 ...

 

Item Standard	Outside Diameter			Thickness		Length
ASTM A312	O.D.≤ 48.26mm + 0.40mm - 0.80mm 48.26mm ＜ O.D.≤ 114.3mm ± 0.80mm 114.3mm ＜ O.D.≤ 219.1mm + 1.60mm - 0.80mm 219.1mm ＜ O.D.≤ 457.2mm + 2.40mm - 0.80mm 457.2mm ＜ O.D.≤ 660.4mm + 3.20mm - 0.80mm 660.4mm ＜ O.D.≤ 863.6mm + 4.00mm - 0.80mm 863.6mm ＜ O.D.≤ 1219mm + 4.80mm - 0.80mm			+ 15% '- 12.5%		L≤7.3m +6.0mm - 0mm

 

What is the difference between TP304 and TP304L?

The main difference between TP304 and TP304L stainless steel is carbon content: TP304L ("L" for Low) has a maximum of 0.03% carbon, significantly less than TP304's 0.08% maximum, which makes TP304L better for welding as it resists intergranular corrosion (weld decay) without needing post-weld annealing, though TP304 offers slightly higher strength.

 

Heat Treatment:

A312 TP 304L seamless steel pipes are typically supplied in the annealed condition, which improves their ductility and formability. However, further heat treatment processes, such as solution annealing or stress relieving, can be performed depending on specific requirements.

 

ASTM A312 TP304L Stainless Steel Seamless Pipe Application

A312 TP 304L seamless steel pipes are widely used in numerous industries such as oil and gas, chemical, food and beverage, pharmaceutical, and pulp and paper. They are commonly used for transporting fluids, gases, and slurries in high-pressure and high-temperature environments.

 

 

If you have project requirements for 304L stainless steel bright annealed tubes, please feel free to place an order. GNEE maintains a large inventory of popular products for your selection. These tubes can be processed into a variety of practical forms, including seamless and welded. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service. Email: info@gneestainless.com

 

Packaging and Delivery

Item	Details
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