ASTM A312 Stainless Steel Pipes

zhao77jie — Thu, 11 Apr 2024 02:57:07 +0000

ASTM A312 is a standard developed by the American Society for Testing and Materials for austenitic seamless and welded steel pipes. Suitable for various types of pipelines, and regulations have been made for the manufacturing, performance, and temperature of materials.

This standard including austenitic stainless steel, duplex stainless steel, and martensitic stainless steel. These stainless steel materials have good corrosion resistance and strength.

Specification of 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

Characteristics Of Stainless Steel Pipes

The characteristics of ASTM A312 stainless steel pipes are mainly reflected in chemical composition, mechanical properties, and manufacturing process.

The corrosion resistance of stainless steel pipes are mainly attributed to their alloy composition. For example, ASTM A312 TP304/316 contain alloying elements such as chromium and nickel, which can improve the corrosion resistance of steel pipes.

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A312 TP304L	MIN						8.00	18.00	\	\
ASTM A312 TP304L	MAX	0.035	2.00	0.045	0.030	1.00	13.00	20.00	\	\
ASTM A312 TP316L	MIN						10.00	16.00	2.00	\
ASTM A312 TP316L	MAX	0.035	2.00	0.045	0.030	1.00	14.00	18.00	3.00	\
ASTM A312 TP317L	MIN						11.00	18.00	3.00	\
ASTM A312 TP317L	MAX	0.035	2.00	0.045	0.030	1.00	15.00	20.00	4.00	\
ASTM A312 TP321	MIN						9.00	17.00	\	\
ASTM A312 TP321	MAX	0.080	2.00	0.045	0.030	1.00	12.00	19.00	\	0.10
ASTM A312 TP347	MIN						9.00	17.00	\	\
ASTM A312 TP347	MAX	0.080	2.00	0.045	0.030	1.00	13.00	19.00	\	\

The mechanical properties of stainless steel pipes are also excellent. It has good performance tensile strength, yield strength, and elongation. These performance guarantees that the pipeline has sufficient strength and reliability in practical use.

Mechanical Properties

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
ASTM A312 TP304L	485 min	170 min	35 min
ASTM A312 TP316L	485 min	170 min	35 min
ASTM A312 TP317L	515 min	205 min	35 min
ASTM A312 TP321	515 min	205 min	35 min
ASTM A312 TP347	515 min	205 min	35 min

In manufacturing process, the standard specifies the manufacturing methods for seamless steel pipes and welded steel pipes. Seamless steel pipes are manufactured through cold or hot processing. Welded steel pipes are manufactured through methods such as automatic welding, manual welding, or combination welding.

In addition, there are various types and specifications of ASTM A312 stainless steel pipes.It can meet the needs of different industries.

Dimension Of Stainless Steel Pipes

Stainless steel pipes commonly used outer diameter ranges from 1/8 inch to 48 inches. The wall thickness includes SCH10S, SCH40S, SCH80S, etc. The production standards for ASTM A312 stainless steel pipes are in accordance with American standards ASME B36.10M and ASME B36.19M. Its strict manufacturing process and quality control also ensure its stability and reliability during use.

Nominal Size			Nominal Wall Thickness T
DN	NPS	OD	Sch10	Sch20	Sch30	STD	Sch40	Sch60	XS	Sch80	Sch100	Sch120	Sch140	Sch160	XXS
6	1/8	10.3	1.24		1.45	1.73	1.73		2.41	2.41
8	1/4	13.7	1.65		1.85	2024	2024		3.02	3.02
10	3/8	17.1	1.65		1.85	2.31	2.31		3.20	3.20
15	1/2	21.3	2.11		2.41	2.77	2.77		3.73	3.73				4.78	7.47
20	3/4	26.7	2.11		2.41	2.87	2.87		3.91	3.91				5.56	7.82
25	1	33.4	2.77		2.90	3.38	3.38		4.55	4.55				6.35	9.09
32	1 1/4	42.2	2.77		2.97	3.56	3.56		4.85	4.85				6.35	9.7
40	1 1/2	48.3	2.77		3.18	3.68	3.68		5.08	5.08				7.14	1015
50	2	60.3	2.77		3.18	3.91	3.91		5.54	5054				8.74	11.07
65	2 1/2	73.0	3.05		4.78	5.16	5.16		7.01	7.01				9.53	14.02
80	3	88.9	3.05		4.78	5.49	5.49		7.62	7.62				11.13	15.24
90	3 1/2	101.6	3.05		4.78	5.74	5.74		8.08	8.08
100	4	114.3	3.05		4.78	6.02	6.02		8.56	8.56		11.13		13.49	17.12
125	5	141.3	3.40			6.55	6.55		9.53	9.53		12.70		15.88	19.05
150	6	168.3	3.40			7.11	7.11		10.97	10.97		14.27		18.26	21.95
200	8	219.1	3.76	6.35	7.04	8.18	8.18	10.31	12.70	12.70	15.09	18.26	20.62	23.01	22.23
250	10	273.0	4.19	6.35	7.80	9.27	9.27	12.70	12.70	15.09	18.26	21.44	25.40	28.58	25.40
300	12	323.8	4.57	6.35	8.38	9.53	10.31	14.27	12.70	17.48	21.44	25.40	28.58	33.32	25.40
350	14	355.6	6.35	7.92	9.53	9.53	11.13	15.09	12.70	19.05	23.83	27.79	31.75	35.71
400	16	406.4	6.35	7.92	9.53	9.53	12.70	16.66	12.70	21.44	26.19	30.56	36.53	40.49
450	18	457.0	6.35	7.92	11.13	9.53	14.27	19.05	12.70	23.83	29.36	34.93	39.67	45.24
500	20	508.0	6.35	9.53	12.70	9.53	15.09	20.62	12.70	26.19	32.54	38.10	44.45	50.01
550	22	559.0	6.35	9.53	12.70	9.53		22.23	12.70	28.58	34.93	41.28	47.63	53.98
600	24	610.0	6.35	9.53	14.27	9.53	17.48	24.61	12.70	30.96	38.89	46.02	52.37	59.54
650	26	660.0	7.92	12.70		9.53			12.70
700	28	711.0	7.92	12.70	15.88	9.53			12.70
750	30	762.0	7.92	12.70	15.88	9.53			12.70
800	321	813.0	7.92	12.70	15.88	9.53	17.48		12.70
850	34	864.0	7.92	12.70	15.88	9.53	17.48		12.70
900	36	914.0	7.92	12.70	15.88	9.53	19.05		12.70
950	38	965.0				9.53			12.70
1000	40	1016.0				9.53			12.70
1050	42	1067.0				9.53			12.70
1100	44	1118.0				9.53			12.70
1150	46	1168.0				9.53			12.70
1200	48	1219.0				9.53			12.70

Application Areas

Oil and gas industry
Chemical and petrochemical industry
Food and beverage industry
Pharmaceutical industry
Power and energy industry:
Steam pipes and high-temperature fluid transmission
Heat exchangers and boiler pipes
Water treatment and wastewater treatment
Corrosion-resistant piping systems in sewage treatment plants
Desalination plants
Decorative or structural parts such as railings and handrails
General corrosion services

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