ASME B36.19 Stainless Steel Pipe

ASME B36.19 is a dimensional standard for stainless steel pipes, complementing ASME B36.10, which is used for carbon and alloy steel pipes. ASME B36.19 provides a uniform set of dimensions to ensure compatibility and reliability in stainless steel piping systems.

Key Features of ASME B36.19:

Covers seamless and welded stainless steel pipes.
Defines pipe dimensions in both inches and millimeters.
Includes schedules such as 5S, 10S, 40S, and 80S, with the “S” indicating stainless steel.
Specifies nominal pipe sizes DN 6 to DN 1200 in mm
Ensures uniform wall thickness for consistent mechanical performance.

Stainless Steel Pipe Material Grades Under ASME B36.19

ASME B36.19 primarily applies to stainless steel pipes manufactured from various grades of austenitic stainless steels, which are known for their corrosion resistance, strength, and durability. Common grades include:

ASTM A312: Covers seamless, welded, and heavily cold-worked stainless steel pipes.
ASTM A358: Covers electric fusion-welded stainless steel pipes.
ASTM A778: Covers welded, unannealed stainless steel pipes.
ASTM A269: Covers seamless and welded stainless steel tubing for general service.

Common Stainless Steel Grades Used:

304/304L Stainless Steel: Offers good corrosion resistance and is widely used in general applications.
316/316L Stainless Steel: Provides superior corrosion resistance, especially in marine and chemical environments.
321 Stainless Steel: Contains titanium for improved resistance to intergranular corrosion.
347 Stainless Steel: Includes niobium for high-temperature applications.

Pipe Dimensions and Schedules in ASME B36.19

SS Pipe Schedule Chart for Schedule 5, Schedule 10 and Schedule 30 (in mm)

DN in mm	OD	5	10	20	30
6	10.3		1.24
8	13.7		1.65
10	17.1		1.65		1.85
15	21.3	1.65	2.11		2.41
20	26.7	1.65	2.11		2.41
25	33.4	1.65	2.77		2.9
32	42.2	1.65	2.77		2.97
40	48.3	1.65	2.77		3.18
50	60.3	1.65	2.77		3.18
65	73	2.11	3.05		4.78
80	88.9	2.11	3.05		4.78
90	101.6	2.11	3.05		4.78
100	114.3	2.11	3.05		4.78
125	141.3	2.77	3.4
150	168.3	2.77	3.4
200	219.1	2.77	3.76	6.35	7.04
250	273	3.4	4.19	6.35	7.8
300	323.8	3.96	4.57	6.35	8.38
350	355.6	3.96	6.35	7.92	9.53
400	406.4	4.19	6.35	7.92	9.53
450	457	4.19	6.35	7.92	11.13
500	508	4.78	6.35	9.53	12.7
550	559	4.78	6.35	9.53	12.7
600	610	5.54	6.35	9.53	14.27
650	660		7.92	12.7
700	711		7.92	12.7	15.88
750	762	6.35	7.92	12.7	15.88
800	813		7.92	12.7	15.88
850	864		7.92	12.7	15.88
900	914		7.92	12.7	15.88

SS Pipe Schedule Chart Schedule 40, Schedule STD, Schedule 60, Schedule 80, and Schedule XS (in mm)

DN in mm	OD	40	Std	60	80	XS
6	10.3	1.73	1.73		2.41	2.41
8	13.7	2.24	2.24		3.02	3.02
10	17.1	2.31	2.31		3.2	3.2
15	21.3	2.77	2.77		3.73	3.73
20	26.7	2.87	2.87		3.91	3.91
25	33.4	3.38	3.38		4.55	4.55
32	42.2	3.56	3.56		4.85	4.85
40	48.3	3.68	3.68		5.08	5.08
50	60.3	3.91	3.91		5.54	5.54
65	73	5.16	5.16		7.01	7.01
80	88.9	5.49	5.49		7.62	7.62
90	101.6	5.74	5.74		8.08	8.08
100	114.3	6.02	6.02		8.56	8.56
125	141.3	6.55	6.55		9.53	9.53
150	168.3	7.11	7.11		10.97	10.97
200	219.1	8.18	8.18	10.31	12.7	12.7
250	273	9.27	9.27	12.7	15.09	12.7
300	323.8	10.31	9.53	14.27	17.48	12.7
350	355.6	11.13	9.53	15.09	19.05	12.7
400	406.4	12.7	9.53	16.66	21.44	12.7
450	457	14.27	9.53	19.05	23.83	12.7
500	508	15.09	9.53	20.62	26.19	12.7
550	559		9.53	22.23	28.58	12.7
600	610	17.48	9.53	24.61	30.96	12.7
650	660		9.53			12.7
700	711		9.53			12.7
750	762		9.53			12.7
800	813	17.48	9.53			12.7
850	864	17.48	9.53			12.7
900	914	19.05	9.53			12.7
950	965		9.53			12.7
1000	1016		9.53			12.7
1050	1067		9.53			12.7
1100	1118		9.53			12.7
1150	1168		9.53			12.7
1200	1219		9.53			12.7

SS Pipe Schedule 100, Schedule 120, Schedule 140, Schedule 160, and Schedule XXS

DN in mm	OD	100	120	140	160	XXS
15	21.3				4.78	7.47
20	26.7				5.56	7.82
25	33.4				6.35	9.09
32	42.2				6.35	9.7
40	48.3				7.14	10.16
50	60.3				8.74	11.07
65	73				9.53	14.02
80	88.9				11.13	15.24
90	101.6					16.15
100	114.3		11.13		13.49	17.12
125	141.3		12.7		15.88	19.05
150	168.3		14.27		18.26	21.95
200	219.1	15.09	18.26	20.62	23.01	22.23
250	273	18.26	21.44	25.4	28.58	25.4
300	323.8	21.44	25.4	28.58	33.32	25.4
350	355.6	23.83	27.79	31.75	35.71
400	406.4	26.19	30.96	36.53	40.49
450	457	29.36	34.93	39.67	45.24
500	508	32.54	38.1	44.45	50.01
550	559	34.93	41.28	47.63	53.98
600	610	38.89	46.02	52.37	59.54

Pipe Schedule Chart for Stainless Steel Pipe in Millimeter (Sch 5s, 10s, 40s and 80s)

DN in mm	OD	5s	10s	40s	80s
6	10.3		1.24	1.73	2.41
8	13.7		1.65	2.24	3.02
10	17.1		1.65	2.31	3.2
15	21.3	1.65	2.11	2.77	3.73
20	26.7	1.65	2.11	2.87	3.91
25	33.4	1.65	2.77	3.38	4.55
32	42.2	1.65	2.77	3.56	4.85
40	48.3	1.65	2.77	3.68	5.08
50	60.3	1.65	2.77	3.91	5.54
65	73	2.11	3.05	5.16	7.01
80	88.9	2.11	3.05	5.49	7.62
90	101.6	2.11	3.05	5.74	8.08
100	114.3	2.11	3.05	6.02	8.56
125	141.3	2.77	3.4	6.55	9.53
150	168.3	2.77	3.4	7.11	10.97
200	219.1	2.77	3.76	8.18	12.7
250	273	3.4	4.19	9.27	12.7
300	323.8	3.96	4.57	9.53	12.7
350	355.6	3.96	4.78	9.53	12.7
400	406.4	4.19	4.78	9.53	12.7
450	457	4.19	4.78	9.53	12.7
500	508	4.78	5.54	9.53	12.7
550	559	4.78	5.54
600	610	5.54	6.35	9.53	12.7
750	762	6.35	7.92

Manufacturing Processes

ASME B36.19 stainless steel pipes can be manufactured using different processes, each affecting the pipe’s performance and application suitability.

1. Seamless Pipes

Seamless stainless steel pipes are produced without welding joints, offering superior strength and corrosion resistance. These pipes are ideal for high-pressure applications and critical industries like chemical processing and oil & gas.

Manufacturing Process:

Raw stainless steel billets are heated and pierced to form a hollow tube.
The tube is elongated and reduced to the desired dimensions using a series of rolling mills.
The final product undergoes heat treatment, pickling, and testing.

2. Welded Pipes

Welded stainless steel pipes are manufactured by rolling stainless steel sheets into cylindrical forms and welding the edges together.

Types of Welded Pipes:

Electric Resistance Welded (ERW): Uses electrical resistance to join the edges.
Fusion Welded (EFW): Uses high-frequency electrical energy to create a seamless-like weld.
Submerged Arc Welded (SAW): Utilizes a submerged arc welding process for larger pipe diameters.

Welded pipes are commonly used in structural applications and industries where high-pressure resistance is not a critical requirement.

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ASME B36.19