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316 stainless steel pipe is a common austenitic stainless steel known for its excellent corrosion resistance and high-temperature performance. It is widely used in industrial and residential applications. It is made from 304 stainless steel with the addition of 2%–3% molybdenum (Mo), which significantly improves its resistance to pitting and crevice corrosion in chloride-containing environments. It outperforms 304 and 310 stainless steel, particularly in environments with sulfuric acid concentrations below 15% or above 85%, as well as in chloride-containing corrosion conditions. It is extensively applied in industries such as papermaking, dyeing, heat exchangers, and coastal construction. Contact us

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Specification of ASTM A312 Stainless Steel Pipe

Processing Method	Seamless and Welded
Size Range	1/8” – 30” / DN6 – 750
Thickness Schedule	SCH 10S- SCH 160, XXS
Length	6m or 12 m or Random
Standard	ASME B36.19M,ASME B36.10M
Surface Treatment	Polish , Mirror , Epoxy Powder FBE, 2PE, 3PE Coating
Material Grade	ASTM A312 TP304/304L/304H, 316/316L, 310S, 317, 347, 904L, S32205, S31803, 32750, 32760, S32550

Chemical Composition of grade 316 Stainless Steel Pipes

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A312 TP316	MIN						11.00	16.00	2.00
	MAX	0.080	2.00	0.045	0.030	1.00	14.00	18.00	3.00
ASTM A312 TP316L	MIN						10.00	16.00	2.00
	MAX	0.035	2.00	0.045	0.030	1.00	14.00	18.00	3.00
ASTM A312 TP316H	MIN	0.04					11.00	16.00	2.00
	MAX	0.10	2.00	0.045	0.030	1.00	14.00	18.00	3.00

Mechanical Properties of 316L Stainless Steel Pipes

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
ASTM A312 TP316	515min	205min	35 min
ASTM A312 TP316L	485 min	170 min	35 min
ASTM A312 TP316H	515min	205min	35 min

316 Stainless Steel Pipes Physical Properties

Grade	Density(kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C(J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
316/L/H	8000	193	15.9	16.2	17.5	16.3	21.5	500	740

ASTM A312 Standard

This specification covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.

Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H, and TP348H are modifications of Grades TP304, TP309Cb, TP309S, TP310Cb, TP310S, TP316, TP321, TP347, and TP348, and are intended for high-temperature service.

Table X1.1 lists the standardized dimensions of welded and seamless stainless steel pipe as shown in ANSI B36.19. These dimensions are also applicable to heavily cold worked pipe. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification.

Features of 316 Stainless Steel Pipe

Excellent Corrosion Resistance

Due to the addition of molybdenum in its composition, 316 stainless steel pipe exhibits superior resistance to pitting and crevice corrosion in chloride-containing environments and acidic media compared to 304 stainless steel. This is attributed to the stable passivation film formed on its surface, which effectively inhibits oxidative reactions. Therefore, it maintains excellent corrosion resistance in acidic, alkaline, and saline media, making it particularly suitable for marine, chemical, and chlorine-containing environments.

Excellent High-Temperature Performance

316 stainless steel pipe retains its strength and stability at high temperatures, capable of operating normally under intermittent use at 870°C and continuous use at 925°C, making it ideal for high-temperature piping systems.

Superior mechanical properties

Compared to 304 stainless steel, 316 stainless steel has higher tensile strength and toughness, enabling it to withstand significant pressure and impact without deformation or fracture. It is commonly used in applications requiring pressure resistance and impact resistance.

Excellent welding and processing properties

316 stainless steel pipe is compatible with various welding processes and can be easily bent, stretched, and formed during processing, meeting complex manufacturing and installation requirements.

Aesthetic and durable

Its surface is smooth and visually appealing, and it does not rust or discolor over time, maintaining a lasting luster and excellent decorative effect.

Stainless Steel Pipe Dimension

Stainless Steel Pipe (ASME B 36.19M)
Nominal Size		OD	Sch5s		Sch10s		Sch40s		Sch80s
DN	NPS	0	T	kg/m	T	kg/m	T	kg/m	T	kg/m
6	1/8	10.3			1.24	0.28	1.73	0.37	2.41	0.47
8	1/4	13.7			1.65	0.49	2.24	0.63	3.02	0.8
10	3/8	17.1			1.65	0.63	2.31	0.84	3.2	1.1
15	1/2	21.3	1.65	0.82	2.11	1	2.77	1.27	3.73	1.62
20	3/4	26.7	1.65	1.04	2.11	1.28	2.87	1.69	3.91	2.2
25	1	33.4	1.65	1.33	2.77	2.09	3.38	2.5	4.55	3.24
32	1 1/4	42.2	1.65	1.68	2.77	2.7	3.56	3.39	4.85	4.47
40	1 1/2	48.3	1.65	1.95	2.77	3.11	3.68	4.05	5.08	5.41
50	2	60.3	1.65	2.44	2.77	3.93	3.91	5.44	5.54	7.48
65	2 1/2	73.0	2.11	3.77	3.05	5.26	5.16	8.63	7.01	11.41
80	3	88.9	2.11	4.6	3.05	6.45	5.49	11.29	7.62	15.27
90	31/2	101.6	2.11	5.29	3.05	7.4	5.74	13.57	8.08	18.63
100	4	114.3	2.11	5.96	3.05	8.36	6.02	16.07	8.56	22.32
125	5	141.3	2.77	9.67	3.4	11.57	6.55	21.77	9.53	30.97
150	6	168.3	2.77	11.55	3.4	13.48	7.11	28.26	10.97	42.56
200	8	219.1	2.77	15.09	3.76	19.96	8.18	42.55	12.7	64.64
250	10	273.1	3.4	23.08	4.19	27.78	9.27	60.31	12.7	96.01
300	12	323.9	3.96	31.89	4.57	36	9.53	73.88	12.7	132.08
350	14	355.6	3.96	35.06	4.78	41.3
400	16	406.4	4.19	42.41	4.78	47.29
450	18	457.2	4.19	47.77	4.78	53.26
500	20	508	4.78	60.46	5.54	68.61
550	22	558.8	4.78	66.57	5.54	75.53
600	24	609.6	5.54	84.16	6.35	94.45
750	30	762	6.35	120.72	7.92	147.36

Permitted Tolerance in Wall Thickness

Tolerance,%from Nominal
NPS Designator	Over(+)	Under (-)
1/8 to 21/2 incl.,all t/D ratios	20.0	12.5
3 to 18 incl.,t/D up to 5% incl.	22.5	12.5
3 to 18 incl.,t/D>5%	15.0	12.5
20 and larger,weldedall t/D ratios	17.5	12.5
20 and larger,seamlesst/D up to 5% incl.	22.5	12.5
20 and larger,seamlesst/D>5%	15.0	12.5
t = Nominal Wall ThicknessD = Ordered Outside Diameter

316 Stainless Steel Pipe Production Process

1. Smelting: Iron ore and alloying elements such as chromium and nickel are smelted into stainless steel ingots in an electric furnace or open-hearth furnace.

2. Hot Rolling: The ingots are heated and then rolled to form stainless steel plates.

3. Cold Rolling: Stainless steel sheets undergo multiple cold rolling cycles to gradually reduce thickness and increase strength and hardness.

4. Annealing: This eliminates internal stresses generated during the rolling process and improves ductility and toughness.

5. tainless Steel Pipe Manufacturing: We manufacture welded or seamless pipes according to customer specifications.

6. Quality Inspection: The finished 316 stainless steel pipes are quality inspected to ensure compliance with relevant standards and customer requirements.

7. Surface treatment: polishing, brushing, sandblasting and other surface treatments to enhance aesthetics and corrosion resistance.

8. Packaging and Transportation: The finished stainless steel pipes are packaged and delivered to customers using appropriate transportation methods.

316 stainless steel pipes, fittings, flanges, plates reference standard:

Stainless steel pipes：ASTM A312 TP316/TP316L/TP316H, ASTM A269, ASTM A270
Stainless steel pipe fittings: ASTM A420 WP316/WP316L/WP316H/
Stainless steel flanges: ASTM A182 F316/F316L/F316H
Stainless steel plates: ASTM A240 Type 316/316L/316H

German standard: DIN17400 1.4404
European standard: EN10088 X2CrNiMo17-12-2

Application Areas

Chemical, Petroleum, and Natural Gas: Transporting corrosive media such as acids, alkalis, and chlorides.

Marine Engineering: Desalination equipment and ship piping systems.

Food and Pharmaceutical: Piping systems with high hygiene requirements.

Heat Exchangers and Boilers: High-temperature and high-pressure resistant components.

Construction and Decoration: Railings, columns, and piping decoration.

18 8 月, 2025