Basic Info.
Application
Automotive Industry, Chemical Industry, Food Industry, Oil and Gas Industry, Pharmaceutical Industry
Material
321 Stainless Steel
Outer Diameter
1/8inch-24inch
Wall Thickness
Sch10s~Sch160
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
Product Description
Product Description
| Product Name | Seamless Stainless Steel U Tube |
| Company Inform | 1.Name:WENZHOU GUOHAO STEEL., LTD
2.Type: Manufacturer |
| Material | Duplex : UNS S31803,UNS S32750, UNS S32760
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)
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 A312,ASTM A213,ASTM A269,ASTM A511,
ASTM A789,ASTM A790,EN 10216-5,DIN 17456,DIN14975,GB/T 14976,GB13296,
GB5310, GB9948,GOST 9940,GOST 9941,ASTM B161,ASTM B163,ASTM B167,ASTM B407,
ASTM B444,ASTM B622,ASTM B677 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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:- Environmental standards
- Health and safety standards
- Ethical trading standards
- 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
- 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.
- 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.
- 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
- More than 16 Years of Experience in Stainless Steel Production.
- Provides cost-effective products and professional services to you.
- 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.
Address:
No. 103, Changhai Road, Wenzhou Industrial Park, Longwan District, Wenzhou, Zhejiang, China
Business Type:
Manufacturer/Factory
Business Range:
Construction & Decoration, Industrial Equipment & Components, Metallurgy, Mineral & Energy, Tools & Hardware
Management System Certification:
ISO 9001
Company Introduction:
Wenzhou Guohao Steel Co., Ltd was established in 2008. We are an ISO9001: 2015 approved manufacturer and stockist of stainless steel products, such as seamless pipes, welded pipes, pipe fittings, and flanges. Our commitment to quality at competitive prices has earned us acclaim from our clients. Guohao Steel now offers a comprehensive range of manufactured stainless steel products, further enhancing its already extensive portfolio of high-performance nickel alloys.
The grades we offer include
Stainless: 304, 304L, 304H, 310S, 314, 316L, 316Ti, 317L, 321, 347H, 904L, 254SMO
Duplex stainless: S32205, S32507, S31803;
Inconel: 600, 601, 625, 718;
Incoloy: 800, 800H, 800HT, 825, 926;
Hastelloy: C-22, C276, B-2;
Monel: 400, K-500;
High temperature alloy: GH3030, GH3039, Cr20Ni80.
We always strive to maintain quality throughout our entire entrepreneurial process in order to deliver optimum quality products and achieve customer satisfaction.
){kind=link}