Stainless Steel Pipe

Stainless steel pipe supplier - GNEE

GNEE's products are exported to 150 countries and regions worldwide, with annual export value reaching 500 million RMB.

Production Capacity
The company has 50 steel production lines and 30 processing machines, covering processes such as processing, bending, painting, heat treatment, cutting, drilling, chamfering, tempering, and surface treatment. It is equipped with comprehensive testing equipment and boasts strong technical capabilities.

Product Certifications
The company has passed ISO9001 international quality management system certification and has obtained 8 quality system certifications, including provincial enterprise credit certificates, enterprise credit certificates, quality service certificates, and integrity management demonstration unit certifications. Products conform to GB, ASTM, JIS, DIN, and other standards.

Main stainless steel pipe types

Stainless Steel Tubes include Austenitic Stainless Steel Tubes, Super Austenitic Stainless Steel Tubes, Ferrite-Austenite Duplex Stainless Steel Tubes, Ni-Alloy Tubes, can be used as Gauge Pipes, Heat Exchanger Pipes, Boiler Pipes, Marine Pipes, Petrochemical Pipes.

Stainless Steel Seamless Pipe

Stainless Steel welded Tube

stainless steel precision pipe

large diameter stainless steel pipe

First 12 3 4 5 6 7 Last

Standards for stainless steel pipes

GB/T14976-2012 Stainless steel seamless steel pipes for fluid transportation
GB/T14975-2012 Stainless steel seamless steel pipes for structural use (replacing GB/T14975-2002)
GB13296-2013 Stainless steel tubes for boiler tubes and heat exchangers
(GJB2608-96) (YB676-73) Aviation structural pipes, thick-walled seamless steel pipes
(GJB2296-95) (YB678-71) Stainless steel pipe for aviation
(YB/T679-97) (YB679-71) 18A hollow rivet thin-walled seamless steel pipe for aviation
GB3090-2000 small diameter stainless steel pipe
GB5310-2017 Seamless steel pipe for high-pressure boilers
GB3087-2008 low and medium pressure boiler tubes
GB3089-2008 Stainless acid-resistant extremely thin-walled seamless steel pipe
GB9948-2013 Seamless steel for petroleum cracking
ASTM A213 Ferritic and austenitic alloy tubes for boilers and heat exchangers
ASTM A269 General Purpose Austenitic Stainless Steel Pipe and Welded Pipe
ASTM A312 austenitic stainless steel seamless steel pipe welded steel pipe welded pipe
ASTM A450 General Requirements for Carbon, Ferritic and Austenitic Alloy Steel Pipe
ASTM A530 General Requirements for Ferrous and Alloy Steels for Special Purposes
ASTM A789 General Requirements for Carbonitic Austenitic Stainless Steel Seamless and Welded Steel Pipe
JIS G3456-88 Stainless steel pipes for mechanical structures
JIS G3448-88 Stainless steel pipes for ordinary pipes
JIS G3459-88 Stainless steel pipes for pipelines
JIS G3463-88 Stainless steel tubes for boilers and heat exchangers

PRODUCT NAME	STANDARD	GRADE	SIZE RANGE OD.	USAGE
Stainless Steel Seamless tubes and pipes	ASME/ASTM SA/A213	TP304, TP304L, TP304H, TP310S, TP310H, TP316, TP316L, TP316Ti, TP321, TP321H, TP347, TP347H,TP410, TP430, S31254, S31803, S32205, S32750, N08800, N08810, N8825, LC30-1812 LC65-2205	1/4 inch to 32 inch	Heat Exchanger and Condenser, Boiler
	ASME/ASTM SA/A269		6.35mm to 813mm
	ASME/ASTM SA/A312		6.35mm to 813mm
	ASME/ASTM SA/A789		6.35mm to 813mm
	ASME/ASTM SA/A790		6.35mm to 813mm
	ASME/ASTM SA/A270		6.35mm to 219mm	Food Hygiene Grade
	JIS G3463, JIS G3459	SUS304, SUS316, SUS321	6mm to 340mm	Heat Exchanger and Condenser, Boiler and others
	DIN17456, DIN17457, DIN17458, DIN17459, DIN28280	1.4301, 1.4307, 1.4948, 1.4541, 1.4878, 1.4550…	6mm to 340mm	Heat Exchanger and Condenser, Boiler and others
Stainless Steel Welded tubes and pipes	ASME/ASTM SA/A249	TP304, TP304L, TP304H, TP310S, TP310H, TP316, TP316L, TP316Ti, TP321, TP321H, TP347, TP347H, S31803, S32205, S32750, N08094	10mm to 2500mm	Heat Exchanger and Condenser, Boiler and others
	ASME/ASTM SA/A269		10mm to 2500mm
	ASME/ASTM SA/A312		10mm to 2500mm
	ASME/ASTM SA/A789		10mm to 2500mm
	ASME/ASTM SA/A790		10mm to 2500mm
	EN10217-7	1.4301, 1.4306, 1.4307, 1.4401, 1.4404	10mm to 2500mm

Stainless Steel Pipe Material Grades

China GB/T20878-2007		USA ASTM A959-2004	Japan JIS G4303-1998 JIS G4311-1991	internationality ISO/TS15510-2003 ISO 4955-2005	Europe EN10088:1-1995 EN 10095-1995	Former Soviet Union r〇CT 5632-1972
New grades	Old brand	USA ASTM A959-2004	Japan JIS G4303-1998 JIS G4311-1991	internationality ISO/TS15510-2003 ISO 4955-2005	Europe EN10088:1-1995 EN 10095-1995	Former Soviet Union r〇CT 5632-1972
15Cr17Mn6Ni5N	1Cr17Mn6Ni5N	S20100, 201	SUS201	X12CrMnNiN17—7—5	X12CrMnNiN17—7—5,1.4372	—
15Cr17Ni7	1Cr17Ni7	S30100, 301	SUS301	X10CrNi18-8	X10CrNi18—8， 1.4310	—
03Cr17Ni7		S30103, 301L	SUS301L
08Cr19Ni9	0Cr18Ni9	S30400，304	SUS304	X5CrNi18-10	X5CrNi18-10	—
03Cr19Ni10	00Cr19Ni10	S30403, 304L	SUS304L	X2CrNi19-11	X2CrNi19-11	03X18H11
03Crl9Nil0N	00Cr18Ni10N	S30453， 304LN	SUS304LN	X2CrNiN18-9	X2CrNiN18-10，1.4311	–
08Cr23Ni13	0Cr23Ni13	S30908， 309S	SUS309S	X12CrNi23-13	X12CrNi23-13，1.4833	10X23H13
25Cr25Ni20	2Cr25Ni20	S31000， 310	SUH310	X15CrNi25-21	X15CrNi25-21，1.4821	20X25H20C2
08Cr25Ni20	0Cr25Ni20	S31008， 310S	SUS310S	X8CrNi25-21	X8CrNi25-21， 1.4845	08X23H18
08Cr17Ni12Mo2	0Cr17Ni12Mo2	S31600， 316	SUS316	X5CrNiMo17-12-2	X5CrNiMo17-12-2， 1.4401	–
03Cr17Ni12Mo2	00Cr17Ni14Mo2	S31603， 316L	SUS316L	X2CrNiMo17-12-2	X2CrNiMo17-12-2， 1.4404	03X17H14M2
07Cr17Ni12Mo2	1Cr17Ni12Mo2	S31609， 316H	–	–	X3CrNiMo17-13-3， 1.4436	–
08Crl7Nil2Mo2Ti	0Cr18Ni12Mo2Ti	S31635， 316Ti	SUS316Ti	X6CrNiMoTi17-12-2	X6CrNiMoTi17-12-2, 1.4571	08X17H13M3T
08Cr17Ni12Mo2N	0Cr17Ni12Mo2N	S31651， 316N	SUS316N	–	–	–
03Cr17Ni12Mo2N	00Cr17Ni13Mo2N	S31653， 316LN	SUS316LN	X2CrNiMoN17-12-3	X2CrNiMoN17-13-3, 1.4429	–
08Cr19Ni13Mo4	0Cr19Ni13Mo3	S31700， 317	SUS317	–	–	–
03Cr19Ni13Mo4	00Cr19Ni13Mo3	S31703， 317L	SUS317L	X2CrNiMo19-14-4	X2CrNiMo18-15-4, 1.4438	03X16H15M3
08Cr18Ni10Ti	0Cr18Ni10Ti	S32100,321	SUS321	X6CrNiTi18-10	X6CrNiTi18-10, 1.4541	08X18H10T
08Cr18Ni11Nb	0Cr18Ni11Nb	S34700， 347	SUS347	X6CrNiNb18-10	X6CrNiNb18-10, 1.4550	08X18H12Б
03Cr22Ni5Mo3N		S31803	SUS329J3L	X2CrNiMoN22-5-3	X2CrNiMoN22-5-3， 1.4462	–
04Cr26Ni6Mo3Cu2N		S32550, 255	SUS329J4L	X2CrNiMoCuN25-6-3	X2CrNiMoCuN25-6-3， 1.4507	–
03Cr25Ni7Mo4N		S32750, 2507	–	X2CrNiMoN25-7-4	X2CrNiMoN25-7-4， 1.4410	–
08Cr11Ti	0Cr11Ti	S40900	SUH409	X6CrTi12	–	–
03Cr11Ti		S40920	SUH409L	X2CrTi12	X2CrTi12，1.4512	–
03CrllNbTi		S40930	—	—	—	—
08Cr13	0Cr13	S41008, 410S	SUS410S	X6Cr13	X6Cr13, 1.4000	08X13
12Cr15	1Cr15	S42900, 429	SUS429	—	—	—
12Cr17d	1Cr17	S43000	SUS430	X6Cr17	X6Cr17, 1.4016	12X17
Y12Cr17	Y1Cr17	S43020, 430F	SUS430F	X7CrS17	X14CrMoS17, 1.4104	—
03Cr18Mo2NbTi	00Cr18Mo2	S44400, 444	SUS444	X2CrMoTi18—2	X2CrMoTi18—2, 1.4521	—
15Cr13	1Cr13	S41000, 410	SUS410	X12Cr13	X12Cr13, 1.4006	12X13
Y15Cr13	Y1Cr13	S41600, 416	SUS416	X12CrS13	X12CrS13, 1.4005	—
21Cr13	2Cr13	S42000, 420	SUS420J1	X20Cr13	X20Cr13, 1.4021	20X13
31Cr13	3Cr13	S42000, 420	SUS420J2	X30Cr13	X30Cr13, 1.4028	30X13
68Cr17	7Cr17	S44002, 440A	SUS440A	—	—	—
85Cr17	8Cr17	S44003, 440B	SUS440B	—	—	—
108Cr17	11Cr17	S44004, 440C	SUS440C	X105CrMo17	X105CrMo17, 1.4125	—
Y108Cr17	Y11Cr17	S44020, 440F	SUS440F	—	—	—
108Cr17Mo	9Cr18Mo	S44004, 440C	SUS440C	X105CrMo17	X105CrMo17, 1.4125	—
90Cr18MoV	9Cr18MoV	S44003, 440B	SUS440B	—	X90CrMoV18, 1.4112	—

Stainless Steel Pipe Sizes

PIPE SIZE	OD IN INCHES	A.S.A. Pipe Schedules
PIPE SIZE	OD IN INCHES	5s	5	10s	10	20	30	40s & Std.	40	60	80s & E.H.	80	100	120	140	160	DBL E.H.
1/8	.405		.035.1383	.049.1863	.049.1863			.068.2447	068.2447		0.95.3145	0.95.3145
1/4	.540		.049.2570	.065.3297	.065.3297			.088.4248	088.4248		.119.5351	.119.5351
3/8	.675		.049.3276	.065.4235	.065.4235			.091.5676	.091.5676		.126.7338	.126.7338
1/2	.840	.065.5383	.065.5383	.083.6710	.083.6710			.109.8510	.109.8510		.1471.088	.1471.088				.1871.304	.2941.714
3/4	1.050	.065.6838	.065.6838	.083.8572	.083.8572			.1131.131	.1131.131		.1541.474	.1541.474				.2181.937	.3082.441
1	1.315	.065.8678	.065.8678	.1091.404	.1091.404			.1331.679	.1331.679		.1792.172	.1792.172				.2502.844	.3583.659
1-1/4	1.660	.0651.107	.0651.107	.1091.806	.1091.806			.1402.273	.1402.273		.1912.997	.1912.997				.2503.765	.3825.214
1-1/2	1.900	.0651.274	.0651.274	.1092.085	.1092.085			.1452.718	.1452.718		.2003.631	.2003.631				.2814.859	.4006.408
2	2.375	.0651.604	.0651.604	.1092.638	.1092.638			.1543.653	.1543.653		.2185.022	.2185.022				.3437.444	.4369.029
2-1/2	2.875	.0832.475	.0832.475	.1203.531	.1203.531			.2035.793	.2035.793		.2767.661	.2767.661				.37510.01	.55213.70
3	3.500	.0833.029	.0833.029	.1204.332	.1204.332			.2167.576	.2167.576		.30010.25	.30010.25				.43714.32	.60018.58
3-1/2	4.000	.0833.472	.0833.472	.1204.973	.1204.973			.2269.109	.2269.109		.31812.51	.31812.51					.63622.85
4	4.500	.0833.915	.0833.915	.1205.613	.1205.613			.23710.79	.23710.79	.28112.66	.33714.98	.33714.98		.43719.01		.53122.51	.67427.54
4-1/2	5.000							.24712.53			.35517.61						.71032.53
5	5.563	.1096.349	.1096.349	.1347.770	.1347.770			.25814.62	.25814.62		.37520.78	.37520.78		.50027.04		.62532.96	.75038.55
6	6.625	.1097.585	.1097.585	.1349.290	.1349.290			.28018.97	.28018.97		.43228.57	.43228.57		.56236.39		.71845.30	.86453.16
7	7.625							.30123.57

Refer Stainless Steel Pipe Weight Formula

Weight (kg/m) = (OD − WT) × WT × 0.02491

OD = Outside Diameter (mm)

WT = Wall Thickness (mm)

0.02491 = Density factor (based on 304 stainless steel density ~7.93 g/cm³)

Example:

For a 304 stainless steel pipe with:

OD = 60.3 mm

WT = 3.91 mm

Weight = (60.3 − 3.91) × 3.91 × 0.02491 ≈ 5.49 kg/m

Pressure Rating Tables for Stainless Steel Pipe

Assumptions:

Material: ASTM A312 TP304 / TP316 / TP316L

Schedule: SCH 40S

Design Factor: 1.0

Units: MPa / psi

Source Reference: ASME B31.3, ASTM A312

Nominal Pipe Size (NPS)	Outside Diameter (mm)	Wall Thickness (mm)	Schedule	Allowable Pressure @100°F (38°C)	Allowable Pressure @400°F (204°C)
1/2"	21.3	2.77	40S	17.2 MPa / 2,500 psi	13.8 MPa / 2,000 psi
3/4"	26.7	2.87	40S	15.9 MPa / 2,300 psi	12.4 MPa / 1,800 psi
1"	33.4	3.38	40S	14.5 MPa / 2,100 psi	11.0 MPa / 1,600 psi
1-1/2"	48.3	3.68	40S	12.4 MPa / 1,800 psi	9.0 MPa / 1,300 psi
2"	60.3	3.91	40S	11.0 MPa / 1,600 psi	8.3 MPa / 1,200 psi
3"	88.9	5.49	40S	10.3 MPa / 1,500 psi	7.6 MPa / 1,100 psi
4"	114.3	6.02	40S	9.7 MPa / 1,400 psi	7.0 MPa / 1,000 psi
6"	168.3	7.11	40S	8.6 MPa / 1,250 psi	6.2 MPa / 900 psi
8"	219.1	8.18	40S	7.6 MPa / 1,100 psi	5.5 MPa / 800 psi
10"	273.0	9.27	40S	6.9 MPa / 1,000 psi	5.0 MPa / 725 psi
12"	323.8	9.53	40S	6.2 MPa / 900 psi	4.5 MPa / 650 psi

application

Stainless steel pipes for chemical industry

Stainless Steel Mechanical Tube

stainless steel handrail tube

Food grade stainless steel pipe

Stainless steel heat exchanger tubes

marine stainless steel tubing

stainless steel sanitary pipe

Stainless Steel Aircraft Tubing

Products Testing

Chemical composition inspection, mechanical properties test (tensile strength, yield strength, elongation, flaring, flattening, bending, hardness, impact test), surface and dimension test, no-destructive test, hydrostatic test.

stainless steel pipe factory

GNEE PACKAGING AND SHIPPING

Bare packed/bundled packed/crate packed/tubes with wooden protection on both sides and suitably protected for sea shipping or as per requirement.

Gnee Packaging and shipping

FAQ

Q:Can you send us sample stainless steel pipes?

A: Of course, we can send samples to all over the world, our samples are free, but customers need to bear the express cost.

Q: What information do I need to provide about stainless steel pipe products?

A: You need to provide the grade, width, thickness, coating and tonnage you need to purchase.

Q:Do we need to maintain stainless steel pipes regularly?

A: The answer is of course yes. Any product needs regular maintenance to work for a long time. If red rust appears on the surface of the stainless steel pipe, you can try to use 10% nitric acid and 2% hydrofluoric acid solution at room temperature to remove the rust. Only regular maintenance can ensure the long life of stainless steel pipes.

Q: Q: What is the difference between stainless steel seamless pipes and stainless steel welded pipes?

A: The biggest difference is the production process. Stainless steel seamless pipes are usually made by hot extrusion and cold drawing. What about stainless steel welded pipes? Stainless steel welded pipe production uses a variety of welding technologies. In addition, these two types of stainless steel pipes have different applications.

Q: Are stainless steel pipes suitable for cryogenic or low temperature environments?

A: Yes. Stainless steel retains its strength and ductility even at sub-zero temperatures, making it an excellent choice for applications in cold environments. It is commonly used in various industries such as cryogenic applications, refrigeration systems, cold storage facilities, and other cryogenic applications.

Q: What does the L after the stainless steel type mean?

A: "L" stands for low carbon or "L-grade" stainless steel. Low carbon stainless steel is indicated by adding an "L" after the alloy designation. For example, you may come across designations like 304L or 316L stainless steel pipe.
The "L" indicates that the stainless steel alloy has a reduced carbon content compared to the standard grade. Low carbon stainless steel offers several benefits: improved weldability, reduced corrosion susceptibility, and maintained corrosion resistance.
While L-grade stainless steels offer enhanced corrosion resistance and weldability, they may cost slightly more than non-L-grade stainless steels.

Q: What is the difference between stainless steel and regular steel?

A: All steel is iron-based, but stainless steel contains chromium in the amount of 10% or more by weight. Chromium, which provides corrosion resistance and a polished appearance, makes it highly resistant to rust and staining, whereas regular steel does not have these properties, making it susceptible to corrosion and staining. Regular steel has a wide range of applications, from construction to manufacturing, where corrosion resistance is not a primary consideration

Q: What are the characteristics of stainless steel?

A: The non-corrosive nature of stainless steel gives it a long service life. With the addition of nickel, the material lasts even longer and in several types of environments. With the addition of molybdenum and nitrogen, stainless steel gains improved resistance to pitting and crevice corrosion. Stainless steel has a high strength-to-weight ratio even at high temperatures. Adding alloys to stainless steel helps it resist heat and scale. The surface of stainless steel is non-porous and easy to clean. It is well suited for medical and food-grade applications as it prevents the absorption of bacteria and germs. Stainless steel does not stain and can be polished to create an aesthetically pleasing appearance.

Q: What forms do you have of stainless steel?

A: GNEE STEEL's stainless steel is available in a variety of forms including bars, wires, tubes, pipes, strips, fittings, fasteners, sheets and plates. (Supply of bars, wires, tubes and pipes)

11. GNEE Value-added services

Beveling
Beveled stainless steel tube is angled at one end to mate with a complementary tube end. In some applications, tubes can be beveled to make it easier to weld stainless steel tubes, which can save weld preparation time and money compared to hand cutting.

Heat Treating and Annealing
GNEE STEEL can heat treat some of its 400 series stainless steel seamless tubes. Heat treating creates stresses due to hardening, depending on the chemistry of the metal being treated. Heat treating is also used for tempering, quenching, normalizing, and solution annealing.

Honing and Turning
During the honing/turning process, an abrasive rotating tool removes metal from the inside surface of a cylinder, pipe, or tube. The primary purpose of honing is to machine the surface to a specific diameter and/or desired cylindrical geometry design. Honing is typically a secondary operation used to finish a product/part, relieve stresses created during production, or correct features of a finished product. A typical production cycle is drilling, reaming, heat treating, and then honing.

Polishing
Positive Material Identification (PMI)
In some cases, it may be necessary to complete additional Positive Material Identification testing. GNEE STEEL can complete this testing in-house or work with an independent laboratory. Please contact us for specific requirements.

UT Testing
Ultrasonic Testing (UT) utilizes high frequency sound energy to inspect and measure stainless steel products. This helps with defect detection/assessment, dimensional measurement, etc.

Gnee Steel (Tianjin) Co., Ltd. is well-known as one of the leading stainless steel pipe manufacturers and suppliers in China. Our factory offers customized stainless steel pipe made in China with competitive price. Welcome to contact us for wholesale service.

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