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Stainless Seamless Pipe

hunan-great-steel-pipe-stainless-seamless-steel-pipe

Keywords: Seamless Pipe, Seamless Carbon Steel Pipe, Seamless Structural Pipe, Seamless Boiler Pipe, Heat Exchanger Tubes, Seamless Cold Drawn Tubes, Hot Finished Seamless Pipes

Size: OD: 1/8'' ~ 48'' (10.3 ~ 1219mm);WT: SCH 10 ~ 160, SCH STD, SCH XS, SCH XXS ; LENGTH: Fixed Length (5.8/6/11.8/12mtr), SRL, DRL

Standard & Grade: ASTM A106, Grade A/B/C

Ends: Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends

Usage: Used for Low Pressure Liquid Delivery, Such As Water, Gas, and Oil

Finish: No.1 Pickled Finish, BA Finish, No.4 Finish, Electropolished Seamless Steel Pipes

Delivery: Within 30 days and Depends on your order quantity

Packing: Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped

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Stainless steel is a versatile material comprised of a steel alloy and a small percentage of chromium—the addition of chromium adds to the material’s corrosion resistance, a trait that earned stainless steel its name. Because stainless steel is also low-maintenance, oxidation resistant, and doesn’t affect other metals it comes in contact with, it is frequently used in a large array of applications, especially in piping and tubing manufacturing.

Stainless steel pipe is primarily used in piping systems for the transport of fluids or gases. Stainless steel pipe resists oxidation, making it a low-maintenance solution that is suitable for high temperature and chemical applications. Because it is easily cleaned and sanitized, stainless steel pipe is also desired for applications involving food, beverages and pharmaceutical applications.

Stainless-Seamless-Steel-Pipe-Details

Welded stainless steel pipe
Standards: ASTM A312
Grades: 304/L and 316/L
Sizes: 1/4" Thru 36"
Schedules: 10s, 20, 40s, 80s

Seamless Stainless Steel Pipe
Standards: ASTM A312
Grades: 304/L and 316/L
Sizes: 1/4" Thru 20”
Schedules: 10s, 40s, 80s, 160, and XXH
True 40, True 80

Equipment:
Stainless-Seamless-Steel-Pipe-Equipment

Application of Stainless Steel Seamless Tube
- Kitchen benches, sinks, troughs, equipment and appliances
- Architectural paneling, railings & trim
- Chemical containers, including for transport
- Heat Exchangers
- Woven or welded screens for mining, quarrying & water filtration
- Threaded fasteners
- Water Supply Systems
- Power Plant
- Paper and pulp Industry
- General Purpose Applications
- Fabrication Industry
- Food Processing Industry
- Industrial Structural Project
- Oil and Gas Pipeline
- Chemical Industry
- Plumbing Industrial

Our Advantages of Stainless Seamless Steel Pipe:
1. China-leading product service provider and exporter of steel pipe
2. Competitive price and quality from our own factory
3. One-stop Resource Integration
4. Passed the ISO9001, CE, SGS certification every year
5. Best service with 24-hour response
6. Flexible payment methods
7. Strong production capacity
8. Fast delivery and standard export packaging
9. OEM/ODM

Sizes of Stainless Seamless Steel Pipe

NB	Size	OD mm	40S mm	5S mm	10S mm	S 10 mm	S 20 mm	S 40 mm	S 60 mm	XS/80S mm	S 80 mm	S 100 mm	S 120 mm	S 140 mm	S 160 mm	XXS mm
	1/8”	10.29			1.24			1.73			2.41
	1/4”	13.72			1.65			2.24			3.02
	3/8”	17.15			1.65			2.31			3.20
15	1/2”	21.34	2.77	1.65	2.11			2.77		3.73	3.73				4.78	7.47
20	3/4”	26.67	2.87	1.65	2.11			2.87		3.91	3.91				5.56	7.82
25	1”	33.40	3.38	1.65	2.77			3.38		4.55	4.55				6.35	9.09
32	1 1/4”	42.16	3.56	1.65	2.77			3.56		4.85	4.85				6.35	9.70
40	1 1/2”	48.26	3.68	1.65	2.77			3.68		5.08	5.08				7.14	10.15
50	2”	60.33	3.91	1.65	2.77			3.91		5.54	5.54				9.74	11.07
65	2 1/2”	73.03	5.16	2.11	3.05			5.16		7.01	7.01				9.53	14.02
80	3”	88.90	5.49	2.11	3.05			5.49		7.62	7.62				11.13	15.24
90	3 1/2”	101.60	5.74	2.11	3.05			5.74		8.08	8.08
100	4”	114.30	6.02	2.11	3.05			6.02		8.56	8.56		11.12		13.49	17.12
125	5”	141.30	6.55	2.77	3.40			6.55		9.53	9.53		12.70		15.88	19.05
150	6”	168.27	7.11	2.77	3.40			7.11		10.97	10.97		14.27		18.26	21.95
200	8”	219.08	8.18	2.77	3.76		6.35	8.18	10.31	12.70	12.70	15.09	19.26	20.62	23.01	22.23
250	10”	273.05	9.27	3.40	4.19		6.35	9.27	12.70	12.70	15.09	19.26	21.44	25.40	28.58	25.40
300	12”	323.85	9.53	3.96	4.57		6.35	10.31	14.27	12.70	17.48	21.44	25.40	28.58	33.32	25.40
350	14”	355.60	9.53	3.96	4.78	6.35	7.92	11.13	15.09	12.70	19.05	23.83	27.79	31.75	35.71
400	16”	406.40	9.53	4.19	4.78	6.35	7.92	12.70	16.66	12.70	21.44	26.19	30.96	36.53	40.49
450	18”	457.20	9.53	4.19	4.78	6.35	7.92	14.27	19.05	12.70	23.83	29.36	34.93	39.67	45.24
500	20”	508.00	9.53	4.78	5.54	6.35	9.53	15.09	20.62	12.70	26.19	32.54	38.10	44.45	50.01
550	22”	558.80	9.53	4.78	5.54	6.35	9.53		22.23	12.70	28.58	34.93	41.28	47.63	53.98
600	24”	609.60	9.53	5.54	6.35	6.35	9.53	17.48	24.61	12.70	30.96	38.89	46.02	52.37	59.54
650	26”	660.40	9.53			7.92	12.70			12.70
700	28”	711.20	9.53			7.92	12.70			12.70
750	30”	762.00	9.53	6.35	7.92	7.92	12.70			12.70
800	32”	812.80	9.53			7.92	12.70	17.48		12.70
850	34”	863.60	9.53			7.92	12.70	17.48		12.70
900	36”	914.40	9.53			7.92	12.70	19.05		12.70

Chemical Composition of Stainless Seamless Steel Pipe

Grades	C max	Mn max	P max	S max	Si max	Cr	Ni	Mo
304	0.08	2.00	0.04	0.03	0.075	18.00-20.00	8.00-11.00	/
304L	0.035	2.00	0.04	0.03	0.075	18.00-20.00	8.00-13.00	/
316	0.08	2.00	0.04	0.03	0.075	16.00-18.00	11.00-14.00	2.00-3.00
316L	0.035	2.00	0.04	0.03	0.075	16.00-18.00	10.00-15.00	2.00-3.00

Mechanical Properties of Stainless Seamless Steel Pipe

Grades	Itemper	Tensile Psi	Yield Psi	Elong %	Rockwell Hardness
304	Annealed	85000-105000	35000-75000	20-55	80-95
304L	Annealed I1/8 Hard	80000-105000	30000-75000	20-55	75-95
316	Annealed	85000 min	35000 min	50 min	80 min
316L	Annealed	80000 min	30000 min	50 min	75 min

Painting & Coating ：Annealed, Pickling, Polished

Manufacturing process of Stainless Seamless Steel Pipe

Q1: What is the difference between welded and seamless stainless steel pipe? Which one should I choose?

A: Welded pipe is formed from a flat strip and welded along the seam, while seamless pipe is extruded from a solid billet with no weld. Welded pipe offers tighter dimensional tolerances, smoother interior surfaces, more consistent wall thickness, and typically 20-30% lower cost. Seamless pipe eliminates any concern about weld integrity in ultra-high-pressure or cyclic applications. For the vast majority of industrial uses – water, chemicals, steam up to 800°C, heat exchangers, and structural supports – a quality solution-annealed welded pipe performs identically to seamless. We recommend welded pipe for pressures up to ANSI 1500 and diameters below 12″.

Q2: Are welded stainless steel pipes suitable for high-temperature applications?

A: Yes, provided the pipe is fully solution-annealed after welding and the correct grade is selected. Austenitic grades maintain strength and oxidation resistance up to 800°C (1472°F). For higher temperatures (up to 1035°C), choose grade 310S or 321. However, as-welded pipes (ASTM A778) should NOT be used above 400°C because the weld zone may become sensitized and prone to intergranular corrosion. Always refer to ASME Section II allowable stress tables – welded A312 pipes receive the same stress values as seamless when fully radiographed.

Q3: How do you prevent rust on stainless welded pipes?

A: Although stainless is “stainless,” it can develop surface rust if contaminated with free iron from carbon steel tools or workshop dust. To prevent this: (1) Use dedicated stainless steel tools. (2) After fabrication, passivate the pipe with a nitric or citric acid solution. (3) Avoid prolonged contact with chlorides (bleach, saltwater). (4) For marine environments, choose 316L. If rust spots appear, they can be removed with a passivation gel or fine abrasive pad.

Q4: What is your typical lead time? Do you stock common sizes?

A: We maintain inventory of common sizes (NPS 1/2″ to 8″, Schedule 10S/40S, grades 304 and 316L) in 6-meter random lengths. Stock items can be cut and shipped within 7-10 days for domestic orders, 12-15 days for export. Non-stock sizes, special grades (310S, 321, duplex), or custom lengths typically require 20-30 days. Expedited production (10-15 days) is available for a surcharge.

Q5: Do you provide mill test certificates (MTC)?

A: Yes. Every shipment includes an EN 10204 Type 3.1 certificate signed by our quality manager. The MTC lists heat number, chemical composition, tensile properties, flattening test result, hydrostatic test pressure, and all dimensional checks. For an additional fee, we can provide Type 3.2 certificates with third-party verification (SGS, BV, TÜV). All MTCs are stored electronically for 10 years.

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Tags : stainless steel seamless pipe , ASTM A312 seamless pipe , TP304 seamless pipe , TP316L seamless pipe , high pressure stainless pipe , ASTM A269 seamless tubing , stainless seamless pipe SCH 40 , 304 seamless stainless steel pipe , 316L seamless pipe