Heat Exchanger Tube, ASTM A213 TP304L (UNS S30403) Stainless Steel Seamless U Bend Tube

• Customization: Available
• Type: Seamless Pipe, Stainless Steel Pipes
• Standard: ASTM, AISI, GB, JIS, DIN, EN, GOST9941
• Model NO.: 304 U tube
• Grade: 300 Series
• Certification: ISO, ISO9001
• Shape: U Channel
• Technique: Cold-Drawing
• Surface Treatment: Ap/Ba/Polishing/Sand Blasting/Shot Blasting
• Application: Automotive Industry, Chemical Industry, Food Industry, Oil and Gas Industry, Pharmaceutical Industry
• Material: 304 Stainless Steel
• Outer Diameter: 1/8inch-24inch
• Wall Thickness: Sch10s~Sch160
• Length: Rl or FL
• Test: Ht/Et/Ut
• 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	Seamless Stainless Steel U Tube
Company Inform	1.Name:WENZHOU GUOHAO STEEL., LTD   2.Type: Manufacturer
Material	Austenitic :TP304, TP304L, TP304H, TP309S, TP310S, TP316L, TP316Ti,  TP321, TP321H,  GOST Grade: 08х18н10т,12х18н10т(AISI 321), 10х17н13м2т(AISI 316Ti), , 20х23н18(AISI 310S), 08х18н10(AISI304)
Standard	ASTM A213,ASTM A269,GOST 9940,GOST 9941
Specification	Outer diameter	0.625-1.252inch  15.9-31.80mm
	Wall thickness	0.035-0.109inch  0.89-2.77mm   BWG 20 18 16 14 13 12
	Intial Length	max 22m
	Bending Radius	24-1000mm
Surface	Annealing&Pickling,  Bright Annealing, Heat Treatment of the Bend
Markings	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.
Flattening Test	For material heat treated in a continuous furnace flattening tests shall be made on a sufficient number of pipes to constitute 5% of the lot, but in no case less than 2 lengths of pipe.
Hydrostatic or Nondestructive Testing	Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test
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
Container	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM Norminal Wall Thickness   Wall Thicknesses Schedule ANSI/ASME B36.10M,B36.19M 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM
Application	Widely used in petroleum,foodstuff,chemical industry,construction, electric power,nuclear energy,machinery,shipbuilding,boiler fields and environmental protection industry.
Referenced Documents	ASTM Referenced Standards A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A370 Test Methods and Definitions for Mechanical Testing of Steel Products A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys A999/A999M Specification for General Requirements for Alloy and Stainless-Steel Pipes A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes E112 Test Methods for Determining Average Grain Size E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

Product Parameters

Chemical Composition & Mechanical Performance

Chemical Composition (%)												Mechanical Performance
TP	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
314	0,200	2,00	0,045	0,015	1,50	24,0	19,0		0,11			550	230	28	223
					2,50	26,0	22,0								HB/HV
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
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	250	35	90
						19,0	13,0
904L UNS 8904	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
						23,00	28,00	5,00
UNS31803/32205	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
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 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 22 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.

 

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 Tubes,cold and hot finished	GOST9941-81

ASTM A312 STANDARD TOLERANCE

NPS Designator	Tolerance, % from Nominal
	Over	Under
⅛ to 2½ incl., all t/D ratios	20.0	12.5
3 to 18 incl., t/D up to 5% incl.	22.5	12.5
3 to 18 incl., t/D > 5%	15.0	12.5
20 and larger, welded, all t/D ratios	17.5	12.5
20 and larger, seamless, t/D up to 5% incl.	22.5	12.5
20 and larger, seamless, t/D > 5%	15.0	12.5

ASTM A213 STANDARD TOLERANCE

NPS [DN] Designator	Tolerance in %, from specified
	Over	Under
⅛ to 2½ [6 to 65] incl., all t/D ratios	20	12.5
Above 2½ [65], incl, t/D ≤ 5%	22.5	12.5
Above 2½ [65], incl, t/D > 5%	15	12.5

ASTM A269 STANDARD TOLERANCE

No.	Size, Outside Diameter, in.	Permissible Variations in Outside Diameter, in. (mm)	Permissible Variations in Wall Thickness, %	Permissible Variations in Cut Length, in. (mm)		Thin Walled Tubes
				Over	Under
1	Up to ½	±0.005(0.13)	±15	⅛(3.2)	0	...
2	½ to 1½, excl	±0.005(0.13)	±10	⅛(3.2)	0	less than 0.065 in. (1.65 mm) nominal
3	1½ to 3½, excl	±0.010(0.25)	±10	3/16(4.8)	0	less than 0.095 in. (2.41 mm) nominal
4	3½ to 5½, excl	±0.015(0.38)	±10	3/16(4.8)	0	less than 0.150 in. (3.81 mm) nominal
5	5½ to 8, excl	±0.030(0.76)	±10	3/16(4.8)	0	less than 0.150 in. (3.81 mm) nominal
6	8 to 12, excl	±0.040(1.01)	±10	3/16(4.8)	0	less than 0.200 in. (5.08 mm) nominal
7	12 to 14, excl	±0.050(1.26)	±10	3/16(4.8)	0	less than 0.220 in. (5.59 mm) nominal

GOST9941-81 STANDARD TOLERANCE 

Outside Diameter	Tolerance			Wall Thickness  mm	Tolerance
mm	Normal	High	Higher		Normal	High	Higher
5≤OD≤10	±0.3mm	±0.2mm	±0.15mm	0.2	±0.05mm	±0.03mm	-
10<OD≤30	±0.4mm	±0.3mm	±0.2mm	0.3≤WT≤0.4	±0.07mm	±0.05mm	-
				0.5≤WT≤0.6	±0.10mm	±0.07mm	-
30<OD≤95	±1.2%	±1.0%	±0.8%	0.7≤WT≤1	±0.15mm	±0.10mm	-
				1<WT≤3	+12.5/-15%	±12.5%	+12.5%/-10%
OD>95	±1.0%	±1.0%	±0.8%	3<WT≤7	±12.5%	+12.5/-10%	±10%
				WT>7	-125	±10%	-

 

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.

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

• Food processing equipment, particularly in beer brewing, milk processing & wine making.
• Kitchen benches, sinks, troughs, equipment and appliances
• Architectural panelling, railings & trim
• Chemical containers, including for transport
• Heat Exchangers
• Oil and gas 

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.