Stainless Steel Seamless Pipe

Description

Product Description Stainless Steel Seamless Pipe

Stainless steel seamless pipes are cylindrical tubes made from solid stainless steel billets or ingots. The absence of seams or welds ensures uniformity, making these pipes a preferred choice for critical applications where structural integrity is paramount.

Key Features

• Seamless Structure: Enhanced uniformity and no weak points.
• Corrosion Resistance: Excellent resistance to oxidation and corrosion in harsh environments.
• High Strength: Superior mechanical properties suitable for high-pressure applications.
• Durability: Extended lifespan with minimal maintenance.
• Thermal Stability: Withstands extreme temperatures without deformation.

Common grades of stainless steel used for seamless pipes include:

• Austenitic Stainless Steel: Grades 304, 304L, 316, 316L, and 321.
• Duplex Stainless Steel: Grades 2205 and 2507.
• Ferritic Stainless Steel: Grades 409 and 430.
• Martensitic Stainless Steel: Grades 410 and 420.

Material Standards

Stainless steel seamless pipes conform to various international standards, including:

• ASTM: A312, A213, A269
• ASME: SA312, SA213, SA269
• EN: 10216-5, 10297-2
• JIS: G3459, G3463

Stainless Steel Seamless Pipe Dimensions

• Outer Diameter: 6 mm to 610 mm
• Wall Thickness: 0.5 mm to 50 mm
• Length: Up to 12 meters (customizable based on client requirements)

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

Chemical Composition

Element	SS 304 (%)	SS 316 (%)	SS 321 (%)
Carbon (C)	0.08 max	0.08 max	0.08 max
Manganese (Mn)	2.00 max	2.00 max	2.00 max
Silicon (Si)	0.75 max	0.75 max	0.75 max
Phosphorus (P)	0.045 max	0.045 max	0.045 max
Sulfur (S)	0.030 max	0.030 max	0.030 max
Chromium (Cr)	18.00-20.00	16.00-18.00	17.00-19.00
Nickel (Ni)	8.00-10.50	10.00-14.00	9.00-12.00
Molybdenum (Mo)	-	2.00-3.00	-
Titanium (Ti)	-	-	5(C+N) min
Nitrogen (N)	-	0.10 max	-

Mechanical Properties

Property	SS 304	SS 316	SS 321
Tensile Strength (MPa)	515 min	515 min	515 min
Yield Strength (0.2% offset) (MPa)	205 min	205 min	205 min
Elongation (% in 50mm)	40 min	40 min	40 min
Hardness (HB)	201 max	217 max	217 max

Thermal Properties

Property	Value (Typical Grade 304)
Thermal Conductivity	16.2 W/m·K at 100°C
Thermal Expansion	17.2 × 10⁻⁶ /K at 100°C
Specific Heat	500 J/kg·K

Manufacturing Process

1. Raw Material Selection: High-quality stainless steel billets are chosen based on the desired grade.
2. Heating and Piercing: Billets are heated to a specific temperature and pierced using a mandrel to form a hollow tube.
3. Rolling: The hollow tube is rolled under precise conditions to achieve the required dimensions and surface finish.
4. Sizing and Stretching: The pipe undergoes sizing to achieve the desired thickness and length.
5. Heat Treatment: Heat treatment improves mechanical properties and ensures stress relief.
6. Finishing: Pipes are polished or pickled to enhance their corrosion resistance and appearance.
7. Quality Testing: Each pipe is subjected to rigorous testing to ensure it meets international standards

Advantages of Stainless Steel Seamless Pipes

1. Enhanced Strength: Seamless design provides uniform strength throughout.
2. Leak-Free Operation: Ideal for high-pressure and high-temperature systems.
3. Ease of Maintenance: High durability reduces the need for frequent repairs.
4. Aesthetic Appeal: Polished surfaces enhance visual appeal.

Applications

Stainless steel seamless pipes are widely utilized across various industries:

1. Oil and Gas
2. Chemical and Petrochemical
3. Power Generation
4. Food and Beverage
5. Automotive and Aerospace
6. Construction and Architecture

Conclusion