Stainless Steel U Bend Tube , ASTM A213 TP304/304L , TP316/316L , TP321/321H , TP310/310S

• Customization: Available
• Type: Seamless Pipe, Stainless Steel Pipes
• Standard: ASTM, AISI, GB, JIS, DIN, EN, GOST9941
• Grade: 300 Series
• Certification: ISO, ISO9001
• Shape: U Channel
• Technique: Cold-Drawing
• Surface Treatment: Pickling
• Material: 304/304L 316/316L 321/321H 310/310s
• Outer Diameter: 6.35~114.3mm
• Wall Thickness: 0.89~3.4mm
• Length: max 30 meters
• Condition: Hard / Soft
• Test: Hydraulic Test/NDT
• Delivery Time: Stock 7 Days; MTO 30 Days
• Trade Terms: EXW, FOB, CFR, CIF etc.
• Markings: According to A999/A999m
• Transport Package: Packed in Bundles or Plywooden Box
• Specification: U tube
• Trademark: GH-STEEL
• Origin: China
• HS Code: 7304419000
• Production Capacity: 2000ton Per Month

Product Description

Product Description

Product Name	Stainless Steel Seamless Pipes /Tubes Труба Сталь конструкционная криогенная Tubería de acero inoxidable sin costura Tubos de Aço Inoxidável sem Costura
Company Inform	1.Name:WENZHOU GUOHAO STEEL., LTD   2.Type: Manufacturer
Material	Austenitic: TP304, TP304L, TP304H, TP309S, TP310S, TP316L, TP316Ti, TP317L, TP321, TP321H, TP347H , 904L, 254SMO GOST Grade: 08х18н10т,12х18н10т(AISI 321), 10х17н13м2т(AISI 316Ti), , 20х23н18(AISI 310S), 06хн28мдт(AISI 904L), 08х18н10(AISI304)
	Duplex Stainless: UNS S31803,UNS S2205,UNS S32750, UNS S32760
	Nickel Alloy: Incoloy: 800/800H/800HT 825 926 20 28 201 200 Inconel :718 600 601 625 Hastelloy: C-22 C-276 B-2 B-3 GH3030 GH3039 Cr20Ni80 ; Monel400,K-500
Standard	ASTM A688 Standard for U bend Stainless steel Tube ASTM A312,ASTM A213,ASTM A269,ASTM A511,ASTM A789,ASTM A790 ASTM B161 B163 B165 B167 B407 B423 B444 B622 B677 B729 B983 EN 10216-5,DIN 17456 GB/T 14976,GB13296,GB/T21833,GB/T 15011,GB/T 15062 GOST 9940,GOST 9941
Specification	D(Outer Diameter)	1/4 inch - 6.35mm;3/8 inch - 9.53mm;1/2 inch - 12.7mm;5/8 inch - 15.88mm; 3/4 inch -19.05mm;1 inch - 25.4mm;1-1/4 inch -31.75mm;1-1/2 inch - 38.1mm; 1-3/4 inch - 44.5mm;2 inch - 50.8mm;2-1/2 inch - 63.5mm;3 inch - 76.2mm; 3-1/2 inch - 88.9mm;4 inch - 101.6mm;4-1/2 inch -114.3mm
	T(Wall Thickness)	BWG20 - 0.89mm,BWG18 - 1.24mm,BWG16 - 1.65mm, BWG14 - 2.11mm,BWG12 - 2.77mm,BWG10 - 3.40mm
	L(Length)	Random length 5~7m Fixed length 6m /6.096m /6.1m/12m  Straight Tube Max 30 meters or as customer's actual request
Delivery condition	Hard:Cold Rolling Soft:Cold Rolling with Heat Treatment Heat Treatment: Stress Relieved After U - Bending (Bending Area Plus 300MM For Each Leg.
Bending Radius:	From 1.5*OD (Outside  Diameter) To 1500mm When  Ordering Tubes With  Radius less or equal to 1.5*OD, It Is Necessary To Agree Precision Of Geometrics.
Pipe End	Plain End (PE)  ;Bevelled End (BE)
Markings	SS SML TUBE ASTM A213 TP304L 25.4x2.11mm Heat No.:***** ET Markings will adhere to prescribed specifications in A999/A999M and shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydrotesting is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). The marking shall also include the manufacturer's private identifying mark, the marking requirement of section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP304H, TP316H, TP321H & TP347H, the marking shall also include the heat number and heat-treatment lot identification.
U Tube Test	1.High Pressure hydrostatic Test: Minimum: 10 Mpa - - 25Mpa 2.Air Under Water Test After Bending 3.U Tube wall thickness Test 4.Eddy Current Test Before U bend Formed 5.Ultrasonic test before U bend Formed 6.Heat Treatment to stress relieved 7.Ball passing Test
Application	Widely Used In Heat - exchanger Systems
Delivery Time	1.for ready stock :7 days after receiving the deposit of T/T 2.For MTO: 35 days after receiving the  deposit of T/T
Trade Terms	EXW,FOB, CFR, CIF etc.
Loading Port	Ningbo/Wenzhou/Shanghai
Remittance method	TT/LC/CASH/DP
Container	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM  40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM

Product Parameters

A213 TP304L seamless U-bend tubes are specialized components used primarily in heat exchangers, pressure vessels, and other applications requiring high corrosion resistance and good mechanical properties at elevated temperatures.

Characteristics
1. Corrosion Resistance: TP304L exhibits excellent resistance to a wide range of corrosive environments, including many organic and inorganic chemicals.
2. Temperature Resistance: This material maintains its strength and mechanical properties at elevated temperatures, making it suitable for high-temperature applications.
3. Weldability: The low carbon content enhances the weldability of TP304L, making it a preferred choice for fabrication processes that involve welding.
4. Mechanical Properties: TP304L has good tensile strength and ductility, which allows it to withstand various mechanical stresses in operational environments.

U-Bend Configuration

Shape: The U-bend design allows for efficient heat transfer in applications such as heat exchangers, where space is limited, and effective fluid flow is crucial.
Manufacturing: The seamless U-bend tubes are manufactured without any welded seams, which enhances their structural integrity and reduces the risk of leaks or failures under pressure.

Chemical Composition & Mechanical Performance

Chemical Composition (%)												Mechanical Performance
Grade	C	Mn	P	S	Si	Cr	Ni	Mo	N	Ti	Others	Mpa (kgf/mm²)		Elongation .(%) em 2" (min.)	Hardness
(AISI)	(max.)	(max.)	(max)	(max.)	(max.)	(min.)	(min.)	(min.)	(min.)	(min.)					HRB
						(max.)	(max.)	(max.)	(max.)	(max.)		Tensile strength (min.)	Yield strength  (min.)		(max.)
304	0,080	2,0	0,045	0,030	1,00	18,0	8,0					515	205	35	90
						20,0	11,0
304L	0,035	2,00	0,045	0,030	1,00	18,0	8,0					485	170	35	90
						20,0	13,0
304H	0,040	2,00	0,045	0,030	1,00	18,0	8,0					515	205	35	90
	0,100					20,0	11,0
309S	0,080	2,00	0,045	0,030	1,00	22,0	12,0	0,75				515	205	35	90
						24,0	15,0
310	0,150	2,00	0,045	0,030	1,00	24,0	19,0					515	205	35	90
						26,0	22,0
310S	0,080	2,00	0,045	0,030	1,00	24,0	19,0	0,75				515	205	35	90
						26,0	22,0
310H	0,040	2,00	0,045	0,030	1,00	24,0	19,0					515	205	35	90
	0,100					26,0	22,0
314	0,200	2,00	0,045	0,015	1,50	24,0	19,0		0,11			515	205	35	90
					2,50	26,0	22,0
316	0,080	2,00	0,045	0,030	1,00	16,0	11,0	2,00				515	205	35	90
						18,0	14,0	3,00
316H	0,040	2,00	0,045	0,030	1,00	16,0	11,0	2,00				515	205	35	90
	0,100					18,0	14,0	3,00
316L	0,035	2,00	0,045	0,030	1,00	16,0	10,0	2,00				485	170	35	90
						18,0	14,0	3,00
316Ti	0,080	2,00	0,045	0,030	0,75	16,0	10,0	2,00	0,10 max	5x(C+N)-0,70		515	205	35	90
						18,0	14,0	3,00
317L	0,035	2,00	0,045	0,030	1,00	18,0	11,0	3,00				515	205	35	90
						20,0	15,0	4,00
321	0,080	2,00	0,045	0,030	1,00	17,0	9,0		0,10 max	5x(C+N)-0,70		515	205	35	90
						19,0	12,0
321H	0,040	2,00	0,045	0,030	1,00	17,0	9,0		0,10 max	4x(C+N)-0,70		515	205	30	90
	0,100					19,0	12,0
347	0,080	2,00	0,045	0,030	1,00	17,0	9,0				Nb:10xC-1,00	515	205	35	90
						19,0	13,0
347H	0,040	2,00	0,045	0,030	1,00	17,0	9,0				Nb:8xC-1,00	515	205	35	90
	0,100					19,0	13,0
S31254 254SMO	0,020	1,00	0,030	0,030	0,08	19,50	17,50	6,00	0,18		Cu:0,50-1,00	t≤5mm 675	t≤5mm 315	35	90
						20,50	18,50	6,50	0,25			t>5mm 655	t>5mm 310
904L	0,020	2,00	0,040	0,030	1,00	19,00	23,00	4,00	0,10 max		Cu:1,00-2,00	490	215		90
UNS 8904						23,00	28,00	5,00
UNS31803	0,030	2,00	0,030	0,020	1,00	21,00	4,50	2,50	0,080			620	450	25	HRC 30
						23,00	6,50	3,50	0,20
UNS32205	0,030	2,00	0,030	0,020	1,00	22,00	4,50	3,00	0,14			655	485	25	HRC 30
						23,00	6,50	3,50	0,20
SUPER DUPLEX UNS32750	0,030	1,20	0,035	0,020	0,80	24,00	6,00	3,00	0,24		Cu: 0,50 max	800	550	15	HRC 34
						26,00	8,00	5,00	0,32
SUPER DUPLEX UNS32760	0,030	1,00	0,030	0,010	1,000	24,00	6,00	3,00	0,20		Cu:0,50-1,00	750	550	25	HRC 32
						26,00	8,00	4,00	0,30		W:0,50-1,00

SPECIFICATION FOR U TUBE,MINIMUM BENDING RADIUS 

MINIMUM BENDING RADIUS IN MM
Outside Diameter		Wall Thickness
		inch	0.035	0.039	0.049	0.059	0.065	0.079	0.083	0.095	0.109
		mm	0.89	1.1	1.24	1.5	1.65	2	2.11	2.41	2.77
		BWG	20		18		16		14	13	12
inch	mm
0.625	15.9		40	32	24	24	24	32
0.63	16		40	32	24	24	24	32
0.75	19.05			38	28.5	28.5	28.5	28.5	28.5	38
0.787	20			40	30	30.3	30	30	30.5	35
0.839	21.3				42.5	32	32	32	32	32
0.984	25					50	38	38	38	38	50
1	25.4					51	38	38	38	38	51
1.181	30					60	45	45	45	45	60
1.252	31.8					65	48	48	48	48	65
Initial Length:Maximum Lengths of 30 m can be supplied on request
Bending Radius: Maximum 1000mm
The above sizes are those most frequently used,other sizes can be produced upon request.

 Weight Chart  for Heat Exchangers Tube& Condensers Tube & Boilier Tube

Outside Diameter		BWG
		25	22	20	18	16	14	12	10
		Wall Thickness mm
		0.508	0.71	0.89	1.24	1.65	2.11	2.77	3.40
mm	inch	Weight kg/m
6.35	1/4	0.081	0.109	0.133	0.174	0.212
9.53	3/8	0.126	0.157	0.193	0.257	0.356	0.429
12.7	1/2		0.214	0.263	0.356	0.457	0.612	0.754
15.88	5/8		0.271	0.334	0.455	0.588	0.796	0.995
19.05	3/4		0.327	0.405	0.553	0.729	0.895	1.236
25.4	1		0.44	0.546	0.75	0.981	1.234	1.574	2.05
31.75	1 1/4		0.554	0.688	0.947	1.244	1.574	2.014	2.641
38.1	1 1/2		0.667	0.832	1.144	1.514	1.904	2.454	3.233
44.5	1 3/4				1.342	1.774	2.244	2.894	3.5
50.8	2				1.549	2.034	2.574	3.334	4.03
63.5	2 1/2				1.949	2.554	3.244	4.214	5.13
76.2	3				2.345	3.084	3.914	5.094	6.19
88.9	3 1/2				2.729	3.609	4.584	5.974	7.27
101.6	4					4.134	5.254	6.854	8.35
114.3	4 1/2					4.654	5.924	7.734	9.43
Stainless Steel Tube: A/SA213, A/SA269, A/SA789, EN10216-5, GOST9941-81.

 

Summary	Standards
Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes	ASTM A213
Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service	ASTM A269
Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes	ASTM A312
Standard Specification For Seamless Stainless Steel Mechanical Tubing	ASTM A511
Standard Specification For Seamless Stainless Steel Tube for Pressure purposes	EN 10216-5
Standard Specification For Seamless Stainless Steel Tubes,cold and hot finished	GOST9941-81

ASTM A213 A269 A312 A789 GOST9941 EN10216-5 Standard Tolerance

Standard	Outside Diameter Tolerance(mm)		Thickness Tolerance(mm)		Length Tolerance (mm)
ASTM A269	D<12.7	±0.13	±15%		+3.2 / -0
	(12.7~38.1]	±0.13	±10%
	[38.1~88.9)	±0.25			+4.8 / -0
	[88.9~139.7)	±0.38
	[139.7~203.2)	±0.76
ASTM A213	D<25.4	±0.1	D≤38.1	+20%/ -0%	D≤50.80	+3 / -0
	[25.4~38.1]	±0.15
	(38.1~50.8)	±0.2	D>38.1	+22%/ -0%	D>50.8	+5 / -0
	[50.8~63.5)	±0.25
	[63.5~76.2)	±0.30
	[76.2~101.6]	±0.38
	(101.6~190.5]	+0.38  / -0.64
	(190.5~228.6]	+0.38  / -1.14
ASTM A312	[10.29~48.26]	+0.4  / -0.8	10.3~73	+20% / -12.5%	+6 / -0
			88.9~457 T/D≤5%	+22.5% / -12.5%
	(48.26~114.30]	±0.80	88.9~457 T/D>5%	+15% / -12.5%
	(114.30~219.08]	+1.6  / -0.8	508above T/D<5%	+22.5% /-12.5%
	(219.08~457.20]	+2.4  / -0.8	508above T/D>5%	+15%/-12.5%
ASTM A789	D<12.7	±0.13	±15%		+3 / -0
	[12.7 to 38.1)	±0.13	±10%
	[38.1 to 88.9)	±0.25			+5 / -0
	[88.9 to 139.7)	±0.38
	[139.7 to 203.2)	±0.76
ГОСТ 9941-81	[5~10]	Normal:±0.30 High:±0.20     Higher:±0.15	T:0.2	Normal:±0.05; High:±0.03	/
			T:0.3~0.4	Normal:±0.07; High:±0.05
			T:0.5~1.0	Normal:±0.15; High:±0.10
	[11~30]	Normal:±0.40 High:±0.30     Higher:±0.20	T:1.2~3.0	Normal:+12.5% / -15%; High:±12.5%; Higher:+12.5% / -10%
			T:3.5~7.0	Normal:±12.5%; High:+12.5% / -10%; Higher:±10%
	[32~95]	Normal:±1.2% High:±1% Higher:±0.8%	T:7.5~8.5	Normal:+12.5% / -10%; Higher:±10%
EN10216-5	D3	±0.75% / ±0.30mm	T3	±10%/ ±0.20mm	L≤6m	+5 +0
	D4	±0.5% / ±0.10mm	T4	±7.5% / ±0.15mm	≥6~12M	+10-0

 

Packaging & Shipping

1. All of our stainless steel seamless pipe & tubes are packaged as per international standard to prevent any possible damage or loss. By default, we will use thick woven plastic bag to bundle the finished pipes together in batches.
2. For some special pipes & tubes that are vulnerable to dirt, scratches, stress or rough handling, we will suggest wooden case for protection. Kindly note, wooden case can incur extra cost, not only its own cost, but also the increased freight cost, which is especially true for air transportation.
3. For enhanced customer experience, we also provide dedicated package as per your special requirements.

Certifications

The inspection of our company and products is open to customers themselves or their designated third-party inspectors, such as SGS, BV, TUV, DNV, etc., who are well-known in the industry.

PRODUCT APPLICATION

 

Company Profile

Wenzhou Guohao Steel was established in 2008. We are ISO 9001:2015 approved manufacturer, having a state-of-the-art infrastructure facility for having smooth production process. It has successfully grown by focusing on serving customers across a range of high technology industries. One of our company strengths is its people, with many colleagues having been with the company from the beginning. This provides our customers with the benefit of a wealth of experience and industry knowledge. Guohao Steel now has the whole of manufactured stainless steel products to add to its already large range of High Performance Nickel Alloys.
Guohao Steel adhere to the high standards of integrity and compliance required, including:

1. Environmental standards
2. Health and safety standards
3. Ethical trading standards
4. Export compliance requirements

We now stock and have direct access to a wide range of other materials, including stainless steels and nickel alloys. We supply and process pipes for numerous key industry sectors, collaborating with both small businesses and large international manufacturers across various countries. Due to our reputation for quality, reliability, and industry approvals, we are a well-regarded supplier in diverse sectors. Our delivery of long-term tangible benefits enables our customers to compete in today's challenging global marketplace.
In order to achieve our goals, we are improving our facilities and expanding our machinery to offer broader processing capabilities. Additionally, our investment extends to the growth and development of our teams, which represent our most valuable resource. We aim for our customers to receive the best experience and trust in the expertise, knowledge, and experience of our teams. As we continue looking towards the future, we rely on our core values to guide both decisions and actions.

Our Advantages

1. More than 16 Years of Experience in Stainless Steel Production.
2. Provides cost-effective products and professional services to you.
3. We offer an extensive range of stainless steel, super duplex steel,nickel alloy.

FAQ

1.Q: Do you provide customized product services?
A: Of course, we can design and produce the products you need based on your specifications and drawings. For example: special dimensions, special controls, OEM, etc.

2.Q: Are you a manufacturer or trader?
A: We are manufacturers. We have our own factory to produce and process various kinds of stainless steel /nickel alloy pipes.

3.Q: Can we get the some samples?Is there a charge?
A: Yes, we will provide you with the samples you want. The samples are free of charge, but the customer may have to pay the freight.

4.Q: Can we visit your factory?
A: Of course, we welcome you to visit our factory on-site or visit our production line through online videos to learn more about our strength and quality. Once we have your schedule, we will arrange a professional sales team to follow up with you.

5.Q: How do you ensure the quality of the product?
A: All products must undergo three inspections throughout the entire manufacturing process, including production, cutting, and packaging. The factory inspection report is provided with the goods. If necessary, third-party inspections such as SGS can be accepted.

6.Q: What is your delivery time?
A: Different products and procurement quantities have different delivery times. The product will be delivered as soon as possible on the basis of quality assurance. Usually, if the goods are in stock, it takes 3-10 days. Alternatively, if the goods are out of stock, it will take 25 to 45 days.

7.Q: Can you arrange shipment?
A: Of course, we have freight forwarders who have been cooperating for many years. We are VIP and can provide you with the most favorable prices and professional services.

8.Q: What if I don't have import experience?
A: We have rich export experience. As long as you have an import license, please leave the rest to us! We will help you choose the most suitable transportation service to safely and accurately deliver the product to the place where it is needed.