ASTM A213 TP316L Tubing Pressure Rating

When purchasing ASTM A213 TP316L seamless stainless steel tubing for boilers, heat exchangers, condensers, or petrochemical systems, one of the most common questions engineers and buyers ask is:

Does ASTM A213 specify a pressure rating?

What pressure can TP316L tubing withstand?
How does wall thickness affect allowable pressure?
Can TP316L operate safely at high temperatures?

 

The answer is more complex than a single pressure value. Unlike valves or flanges, ASTM A213 does not assign a fixed pressure rating to stainless steel tubes. The actual working pressure depends on several engineering factors, including tube dimensions, wall thickness, allowable stress, operating temperature, corrosion allowance, and applicable design codes such as ASME B31.3 or the ASME Boiler and Pressure Vessel Code.

 

This guide explains how pressure ratings are determined and how to select the correct TP316L tubing for high-pressure applications.

 

Does ASTM A213 specify a pressure rating?

No, ⁠ASTM A213 does not define specific pressure ratings. Instead, the standard specifies the chemical composition, mechanical properties, and manufacturing processes for seamless ferritic and austenitic alloy and stainless steel tubes used in high-temperature and pressure environments like boilers and heat exchangers.

 

What Is ASTM A213 TP316L Tubing Pressure Rating?

What is the pressure rating of an ASTM A213 TP316L steel tube? The pressure rating refers to the maximum allowable internal pressure that a steel tube can safely withstand under specific operating conditions. For seamless stainless steel heat exchanger tubes, the pressure rating depends on the following factors: outside diameter (OD), wall thickness (WT), allowable stress of the material, operating temperature, corrosion allowance, manufacturing tolerances, and design code requirements. Since these variables vary from project to project, ASTM A213 only provides material specifications, whereas the final pressure rating is typically calculated using Barlow's formula or the ASME Boiler and Pressure Vessel Code (BPVC).

 

ASTM A213 TP316L Pressure Rating Formula

P = Internal Design Pressure (PSI or MPa)

S = Allowable Stress Value (from ASME B31.3 or BPVC Section II)

t = Nominal Wall Thickness (Inches or mm)

D = Outside Diameter (OD) (Inches or mm)

Material: ASTM A213 TP316L (Seamless)
Design Code: ASME B31.3 (Process Piping)
Allowable Stress (S): 16,700 psi (at -20°F to 100°F) per ASME BPVC Section II, Part D.
Joint Efficiency (E): 1.0 (Seamless Tubing)
Wall Tolerance: Calculated based on Minimum Wall Thickness (tmin) as per ASTM A213 requirements (Nominal wall minus 12.5% tolerance)

 

How does wall thickness affect allowable pressure?

The thicker the pipe or cylinder wall, the higher the allowable pressure it can withstand without rupturing or deforming. Extra material provides more cross-sectional area to distribute the hoop stress (stress caused by internal pressure) and resists expansion. However, thicker walls also reduce the internal flow area.

 

Working Pressure Ratings at Ambient Temperature (100°F / 38°C)

Values are in PSI (Pounds per Square Inch). Calculated using the ASME B31.3 formula.

OD (Inches)	0.035" Wall	0.049" Wall	0.065" Wall	0.083" Wall	0.095" Wall	0.109" Wall	0.120" Wall
1/4"	4,050	5,880	8,240	-	-	-	-
3/8"	2,610	3,760	5,140	6,850	-	-	-
1/2"	1,920	2,760	3,760	4,960	5,800	-	-
5/8"	1,520	2,170	2,940	3,850	4,490	5,240	-
3/4"	1,260	1,790	2,420	3,160	3,660	4,260	4,750
7/8"	1,070	1,520	2,050	2,670	3,090	3,590	4,000
1"	930	1,320	1,780	2,310	2,670	3,100	3,440
1-1/4"	-	1,050	1,410	1,820	2,100	2,430	2,690
1-1/2"	-	870	1,160	1,500	1,730	2,000	2,220
2"	-	-	860	1,110	1,280	1,470	1,630

 

Does operating temperature affect 316L pressure rating?

Yes. As temperature increases, the allowable stress of TP316L decreases, reducing the maximum allowable working pressure.

To determine the allowable pressure at elevated temperatures, multiply the ambient pressure from Table 1 by the factor below.

Temperature (°F)	Temperature (°C)	Derating Factor	TP316L Allowable Stress (psi)
100	38	1.00	16,700
200	93	0.85	14,200
300	149	0.78	13,100
400	204	0.73	12,200
500	260	0.69	11,600
600	315	0.66	11,100
700	371	0.64	10,700
800	427	0.62	10,400

Disclaimer: This table is for general information only. Pressure vessel and piping design should always be performed by a qualified professional engineer in accordance with specific project requirements and the latest revisions of ASME codes.
If you have specific numbers in mind, tell me your tube's outside diameter, wall thickness, and material grade (e.g., TP304, TP316, T11), and I can run the exact pressure math for you.

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Can TP316L operate safely at high temperatures?

Yes, TP316L can operate safely at high temperatures, though there are specific performance limitations. Regarding temperature range and oxidation resistance, it is suitable for continuous service up to 925°C (1700°F) and intermittent service up to 870°C (1600°F).
Despite its ability to withstand high temperatures, TP316L experiences a significant drop in tensile and yield strength when temperatures exceed 500°C to 550°C. For structural components operating above 500°C or parts subject to high pressure, the high-carbon grade 316H or the stabilized grade 316Ti is generally preferred.

 

ASTM A213 TP316L Heat Exchanger Tube Supplier, Manufacturer, and Exporter

GNEE supplies ASTM A213 TP316L seamless stainless steel pipes for global projects in boilers, heat exchangers, petrochemicals, and power generation; with exports to over 80 countries, the standard delivery time is 7 to 15 days.

Surface finish: Bright Annealed (BA), Annealed and Pickled (AP)
Delivery condition: Solution annealed (heated to a minimum of 1900°F [1040°C] and rapidly quenched)

 

Straight Tubes	ASTM A213 / ASME SB213	OD: 6.35mm - 101.6mm WT: 0.89mm - 5.0mm Length: Up to 25,000mm	Seamless, precision drawn, scale-free surface. Available in Bright Annealed (BA) or Annealed & Pickled (AP) finish.
U-Bend Tubes	ASTM A213 & ASTM A688	Bend Radius: 1.5 × OD to 1200mm Leg Length: Max 12,500mm	Used in U-shell heat exchangers. Bending area is usually Stress Relief Annealed to prevent Stress Corrosion Cracking (SCC).
Corrugated Tubes	Manufacturer Spec	Pitch: Customized Depth: 0.5mm - 1.5mm	Tubes are indented with a spiral pattern to create turbulence, reducing scaling and increasing heat transfer coefficients.
Coiled Tubing	ASTM A213 / A269	Length: Up to 500 - 2,000m OD: 3.18mm - 25.4mm	Used for immersion heaters or helical heat exchangers. Reduces the number of orbital welds in long runs.

 

 

Chemical Composition % Of ASTM A213 Grade TP316L Stainless Steel Tube

Weight %	C	Mn	P	S	Si	Cr	Ni	Mo
316L	.035	2.00	.045	.030	1.00	16.0-18.0	10.0-14.0	2.0-3.0

 

Mechanical Properties Of ASTM A213 Grade TP316L Stainless Steel Seamless Tube

Grade	Tensile Strength Rm(MPa)	Yield Strength ReH(MPa)	Elongation A(%)	Impact Energy KV(J,0℃)	Hardness(max)
TP316L	≥485	≥170	≥35	-	≤192HBW

 

NDT - Non-Destructive Test

According to ASTM A213 and A1016 standards, TP316L heat exchanger tubes typically require the following tests:
* Flattening Test: Ensures the tube does not crack under pressure.
* Flaring Test: Verifies the tube's expansion performance during heat exchanger tubesheet installation.
* Hydrostatic Test: Each tube undergoes a pressure test to ensure no leakage.
* Eddy Current Test: Inspects surface and near-surface defects (the most common non-destructive testing method for heat exchanger tubes).
* Ultrasonic Test: Used to detect internal defects for thicker wall materials or those with extremely high requirements.

 

End Types and Packaging

Ends: Plain, beveled, or threaded
Packaging: Bundled in PE fabric, wooden cases, or seaworthy export packaging
Marking: Includes grade, size, heat number, manufacturer logo, and standard