Stainless Steel Seamless Industrial Pipes: In-Stock Availability of 304 and 316 Grade Materials
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Product Highlights
- Wide Material Range: Includes 304, 316, Duplex, and Nickel Alloys with GOST and ASTM standards.
- Customizable Dimensions: Outer diameter from 6mm to 630mm and wall thickness from SCH 5S to SCH XXS.
- Flexible Length Options: Available in random lengths, fixed lengths, or fully customized to client requests.
- Comprehensive Testing: Includes hydraulic, NDT, flattening, and chemical analysis with EN 10204 Type 3.1 certificates.
- Value-Added Services: Offers cutting, bending, polishing, shot blasting, drilling, and oil degreasing.
- Fast Stock Delivery: Ready stock items are delivered within 7 days after deposit receipt.
- Global Trade Terms: Supports EXW, FOB, CFR, CIF, FCA with ports in Ningbo, Wenzhou, and Shanghai.
- ISO 9001 Certified: Manufacturer adheres to strict quality control and international safety standards.
Product Attributes
- Customization
- Available
- Application
- Automotive Industry, Chemical Industry, Food Industry, Oil and Gas Industry, Pharmaceutical Industry
- Certification
- ISO9001
- Model NO.
- stock
- Length
- Random length/ Fixed Length
- Material
- 316 Stainless Steel
- Outer Diameter
- 1/8 inch - 24 inch
- Type
- Seamless Pipe
- Wall Thickness
- SCH 10S - SCH XXS
- Section Shape
- Round
- Process
- Cold-rolled /Cold-drawn
- Test
- Hydraulic Test/NDT
- Delivery Time
- Stock 7 Days; MTO 30 Days
- Trade Terms
- EXW, FOB, CFR, CIF etc.
- Transport Package
- Packed in Bundles or Plywooden Box
- Specification
- 6~630 mm
- Trademark
- GH-STEEL
- Origin
- China
- HS Code
- 7304419000
- Production Capacity
- 2000ton Per Month
- Package Size
- 600.00cm * 57.00cm * 57.00cm
- Package Gross Weight
- 1000.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
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- Payment Guarantee
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- Optional pre-shipment inspection for quality and quantity checks.
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- Platform-assisted dispute resolution, including refunds or returns when applicable.
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Product Images of Stainless Steel Seamless Industrial Pipes: In-Stock Availability of 304 and 316 Grade Materials
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Product Description

| Product Description | Stainless Steel Seamless Pipes /Tubes Pipa Stainless Steel Seamless Труба Сталь конструкционная криогенная Нержавеющая бесшовная труба Trubka nerezová bezešvá Tubería de acero inoxidable sin costura Tubos de Aço Inoxidável sem Costura Tubo INOXIDABLE SIN COSTURA |
|
| Company Information | Supplier:WENZHOU GUOHAO STEEL., LTD It is an economical entity which contains production and trade. Tax number:91330303679583678U |
|
| Material | Austenitic:TP304,TP304L,TP304H,TP309S,TP310,TP310S,TP310H,TP316L,TP316Ti,TP317L,TP321,TP321H,TP347H,904L,254SMO,253MA | |
| 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 | ||
| Sources of raw materials | TSINGHSAN,BAOSTEEL,YONGXING,FUKAI etc | |
| Standard | ASTM A312,ASTM A213,ASTM A269,ASTM A511,ASTM A789,ASTM A790 | |
| EN 10216-5,DIN 17456 | ||
| GB/T 14976,GB13296,GB/T 21833,GB/T 15011,GB/T 15062 | ||
| GOST 9940-81,GOST 9941-2022 | ||
Specification![]() |
D(Outer Diameter) | 6mm-630mm 1/8inch-24inch |
| T(Wall Thickness) | 0.89mm-80mm SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, SCH XXS 10 BWG, 12 BWG, 14 BWG , 16 BWG, 18 BWG, 20 BWG 10 SWG, 12 SWG, 14 SWG , 16 SWG, 18 SWG, 20 SWG |
|
| L(Length) | Random length 5~7m; Fixed length 6m /6.096m /6.1m/12m; As customer's actual request |
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| Surface | Annealing&Pickling, Polishing Bright Annealing Sand Blasting Shot Blasting / Shot Peening |
|
| Pipe End | Plain End (PE) Beveled End (BE) |
|
| Markings | GH-STEEL SML ASTM A312 TP304 60x2 MM HEAT NO.:*********** 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. |
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| 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. | |
| Hydraulic Test or Nondestructive Test | Each pipe shall be subjected to the Nondestructive Test or the hydraulic test | |
| Value Added Services | Customize Length/Pipe slice Bending Polishing (180#,240#,320#,400#,600#) Shot Blasting / Shot Peening Drilling/Punching Oil Degreasing Print Colour Code |
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| 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 |
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| Trade Terms | EXW,FOB,FCA, CFR, CIF etc. | |
| Loading Port | Ningbo/Wenzhou/Shanghai | |
| Remittance method | TT/LC/CASH/DP | |
| 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) | ||


| Chemical Composition (%) | Mechanical Performance | ||||||||||||||
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo | N | Ti | Others | Tensile strength Mpa(min) |
Yield strength Mpa(min) |
Elongation. (%) em 2" (min) |
Hardness HRB(max) |
| (AISI) | (max) | (max) | (max) | (max) | (max) | (min) | (min) | (min) | (min) | (min) | |||||
| (max) | (max) | (max) | (max) | (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 | 2,0 | - | - | - | 515 | 205 | 35 | 90 |
| 18,0 | 14,0 | 3,0 | |||||||||||||
| 316H | 0,040 | 2,00 | 0,045 | 0,030 | 1,00 | 16,0 | 11,0 | 2,0 | - | - | - | 515 | 205 | 35 | 90 |
| 0,100 | 18,0 | 14,0 | 3,0 | ||||||||||||
| 316L | 0,035 | 2,00 | 0,045 | 0,030 | 1,00 | 16,0 | 10,0 | 2,0 | - | - | - | 485 | 170 | 35 | 90 |
| 18,0 | 14,0 | 3,0 | |||||||||||||
| 316Ti | 0,080 | 2,00 | 0,045 | 0,030 | 0,75 | 16,0 | 10,0 | 2,0 | 0,10 | 5x(C+N) | - | 515 | 205 | 35 | 90 |
| 18,0 | 14,0 | 3,0 | 0,70 | ||||||||||||
| 317L | 0,035 | 2,00 | 0,045 | 0,030 | 1,00 | 18,0 | 11,0 | 3,0 | - | - | - | 515 | 205 | 35 | 90 |
| 20,0 | 15,0 | 4,0 | |||||||||||||
| 321 | 0,080 | 2,00 | 0,045 | 0,030 | 1,00 | 17,0 | 9,0 | - | 0,10 | 5x(C+N) | - | 515 | 205 | 35 | 90 |
| 19,0 | 12,0 | 0,70 | |||||||||||||
| 321H | 0,040 | 2,00 | 0,045 | 0,030 | 1,00 | 17,0 | 9,0 | - | 0,10 | 4x(C+N) | - | 515 | 205 | 30 | 90 |
| 0,100 | 19,0 | 12,0 | 0,70 | ||||||||||||
| 347 | 0,080 | 2,00 | 0,045 | 0,030 | 1,00 | 17,0 | 9,0 | - | - | - | Nb: 10xC-1,0 |
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-1,0 |
515 | 205 | 35 | 90 |
| 0,100 | 19,0 | 13,0 | |||||||||||||
| 254SMO S31254 |
0,020 | 1,00 | 0,030 | 0,030 | 0,08 | 19,5 | 17,50 | 6,0 | 0,18 | - | Cu: 0,5-1,0 |
675 (T≤5mm) |
315 (T≤5mm) |
35 | 90 |
| 20,5 | 18,50 | 6,5 | 0,25 | 655 (T>5mm) |
310 (T>5mm) |
||||||||||
| 253MA S30815 |
0,05 | 0,80 | 0,040 | 0,030 | 1,40 | 20,0 | 10,0 | - | 0,14 | - | Ce: 0,03-0,08 |
600 | 310 | 40 | 95 |
| 0,100 | 2,00 | 22,0 | 12,0 | 0,20 | |||||||||||
| 904L N08904 |
0,020 | 2,00 | 0,040 | 0,030 | 1,00 | 19,0 | 23,0 | 4,0 | 0,10 | - | Cu: 1,0-2,0 |
490 | 215 | 35 | 90 |
| 23,0 | 28,0 | 5,0 | |||||||||||||
| S31803 | 0,030 | 2,00 | 0,030 | 0,020 | 1,00 | 21,0 | 4,5 | 2,5 | 0,080 | - | - | 620 | 450 | 25 | HRC 30 |
| 23,0 | 6,5 | 3,5 | 0,20 | ||||||||||||
| S32205 | 0,030 | 2,00 | 0,030 | 0,020 | 1,00 | 22,0 | 4,5 | 3,0 | 0,14 | - | - | 655 | 485 | 25 | HRC 30 |
| 23,0 | 6,5 | 3,5 | 0,20 | ||||||||||||
| S32750 | 0,030 | 1,20 | 0,035 | 0,020 | 0,80 | 24,0 | 6,0 | 3,0 | 0,24 | - | Cu:≤0,5 | 800 | 550 | 15 | HRC 34 |
| 26,0 | 8,0 | 5,0 | 0,32 | ||||||||||||
| S32760 | 0,030 | 1,00 | 0,030 | 0,010 | 1,00 | 24,0 | 6,0 | 3,0 | 0,20 | - | Cu:0,5-1,0 | 750 | 550 | 25 | HRC 32 |
| 26,0 | 8,0 | 4,0 | 0,30 | W:0,5-1,0 | |||||||||||
| Grade | Material number | C (max) |
Si (max) |
Mn (max) |
P (max) |
S (max) |
N (max) |
Cr | Mo | Ni | Ti | Nb |
| X5CrNi18-10 | 1.4301 | 0.070 | 1.00 | 2.00 | 0.045 | 0.015 | 0.11 | 17.00-19.50 | 8.00-10.50 | |||
| X2CrNi19-11 | 1.4306 | 0.030 | 1.00 | 2.00 | 0.045 | 0.015 | 0.11 | 18.00-20.00 | 10.00-12.00 | |||
| X2CrNiN18-10 | 1.4311 | 0.030 | 1.00 | 2.00 | 0.045 | 0.015 | 0.12-0.22 | 17.00-19.50 | 8.50-11.50 | |||
| X6CrNiTi18-10 | 1.4541 | 0.080 | 1.00 | 2.00 | 0.045 | 0.015 | 17.00-19.00 | 9.00-12.00 | 5×C-0.70 | |||
| X6CrNiNb18-10 | 1.4550 | 0.080 | 1.00 | 2.00 | 0.045 | 0.015 | 17.00-19.00 | 9.00-12.00 | 10×C-1.00 | |||
| X5CrNiMo17-12-2 | 1.4401 | 0.070 | 1.00 | 2.00 | 0.045 | 0.015 | 0.11 | 16.50-18.50 | 2.00-2.50 | 10.00-13.00 | ||
| X2CrNiMo17-12-2 | 1.4404 | 0.030 | 1.00 | 2.00 | 0.045 | 0.015 | 0.11 | 16.50-18.50 | 2.00-2.50 | 10.00-13.00 | ||
| X6CrNiMoTi17-12-2 | 1.4571 | 0.080 | 1.00 | 2.00 | 0.045 | 0.015 | 16.50-18.50 | 2.00-2.50 | 10.50-13.50 | 5×C-0.70 | ||
| X2CrNiMoN17-13-3 | 1.4429 | 0.030 | 1.00 | 2.00 | 0.045 | 0.015 | 0.12-0.22 | 16.50-18.50 | 2.50-3.00 | 11.00-14.00 | ||
| X2CrNiMo18-14-3 | 1.4435 | 0.030 | 1.00 | 2.00 | 0.045 | 0.015 | 0.11 | 17.00-19.00 | 2.50-3.00 | 12.50-15.00 | ||
| X3CrNiMo17-13-3 | 1.4436 | 0.050 | 1.00 | 2.00 | 0.045 | 0.015 | 0.11 | 16.50-18.50 | 2.50-3.00 | 10.50-13.00 | ||
| X2CrNiMoN17-13-5 | 1.4439 | 0.030 | 1.00 | 2.00 | 0.045 | 0.015 | 0.12-0.22 | 16.50-18.50 | 4.00-5.00 | 12.50-14.50 |
| Outside Diameter | Wall Thicknesses Schedule ANSI/ASME B36.10M,B36.19M | |||||||||||||||||
| DN(in) | D(mm) | SCH 5S |
SCH 10S |
SCH 10 |
SCH 20 |
SCH 30 |
SCH 40S |
SCH STD |
SCH 40 |
SCH 60 |
SCH 80s |
SCH XS |
SCH 80 |
SCH 100 |
SCH 120 |
SCH 140 |
SCH 160 |
SCH XXS |
| 1/8" | 10.3 | - | 1.24 | - | - | - | 1.73 | 1.73 | 1.73 | - | 2.41 | 2.41 | 2.41 | - | - | - | - | - |
| 1/4" | 13.7 | - | 1.65 | - | - | - | 2.24 | 2.24 | 2.24 | - | 3.02 | 3.02 | 3.02 | - | - | - | - | - |
| 3/8" | 17.1 | - | 1.65 | - | - | - | 2.31 | 2.31 | 2.31 | - | 3.2 | 3.2 | 3.2 | - | - | - | - | - |
| 1/2" | 21.3 | 1.65 | 2.11 | - | - | - | 2.77 | 2.77 | 2.77 | - | 3.73 | 3.73 | 3.73 | - | - | - | 4.78 | 7.47 |
| 3/4" | 26.7 | 1.65 | 2.11 | - | - | - | 2.87 | 2.87 | 2.87 | - | 3.91 | 3.91 | 3.91 | - | - | - | 5.56 | 7.82 |
| 1" | 33.4 | 1.65 | 2.77 | - | - | - | 3.38 | 3.38 | 3.38 | - | 4.55 | 4.55 | 4.55 | - | - | - | 6.35 | 9.09 |
| 1-1/4" | 42.2 | 1.65 | 2.77 | - | - | - | 3.56 | 3.56 | 3.56 | - | 4.85 | 4.85 | 4.85 | - | - | - | 6.35 | 9.7 |
| 1-1/2" | 48.3 | 1.65 | 2.77 | - | - | - | 3.68 | 3.68 | 3.68 | - | 5.08 | 5.08 | 5.08 | - | - | - | 7.14 | 10.15 |
| 2" | 60.3 | 1.65 | 2.77 | - | - | - | 3.91 | 3.91 | 3.91 | - | 5.54 | 5.54 | 5.54 | - | - | - | 8.74 | 11.07 |
| 2-1/2" | 73 | 2.11 | 3.05 | - | - | - | 5.16 | 5.16 | 5.16 | - | 7.01 | 7.01 | 7.01 | - | - | - | 9.53 | 14.02 |
| 3" | 88.9 | 2.11 | 3.05 | - | - | - | 5.49 | 5.49 | 5.49 | - | 7.62 | 7.62 | 7.62 | - | - | - | 11.13 | 15.24 |
| 3-1/2" | 101.6 | 2.11 | 3.05 | - | - | - | 5.74 | 5.74 | 5.74 | - | 8.08 | 8.08 | 8.08 | - | - | - | - | - |
| 4" | 114.3 | 2.11 | 3.05 | - | - | - | 6.02 | 6.02 | 6.02 | - | 8.56 | 8.56 | 8.56 | - | 11.13 | - | 13.49 | 17.12 |
| 5" | 141.3 | 2.77 | 3.4 | - | - | - | 6.55 | 6.55 | 6.55 | - | 9.53 | 9.53 | 9.53 | - | 12.7 | - | 15.88 | 19.05 |
| 6" | 168.3 | 2.77 | 3.4 | - | - | - | 7.11 | 7.11 | 7.11 | - | 10.97 | 10.97 | 10.97 | - | 14.27 | - | 18.26 | 21.95 |
| 8" | 219.1 | 2.77 | 3.76 | - | - | 7.04 | 8.18 | 8.18 | 8.18 | 10.31 | 12.7 | 12.7 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 |
| 10" | 273.1 | 3.4 | 4.19 | - | 6.35 | 7.8 | 9.27 | 9.27 | 9.27 | 12.7 | 12.7 | 12.7 | 15.09 | 18.26 | 25.4 | 28.58 | 25.4 | - |
| 12" | 323.9 | 3.96 | 4.57 | - | 6.35 | 8.38 | 9.53 | 9.53 | 10.31 | 14.27 | 12.7 | 12.7 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 25.4 |
| 14" | 355.6 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | - | 9.53 | 11.13 | 15.09 | - | 12.7 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | - |
| 16" | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | - | 9.53 | 12.7 | 16.66 | - | 12.7 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | - |
| 18" | 457.2 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | - | 9.53 | 14.27 | 19.05 | - | 12.7 | 23.83 | 29.36 | 34.93 | 39.67 | 45.24 | - |
| 20" | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | - | 9.53 | 15.09 | 20.62 | - | 12.7 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | - |
| 22" | 558.8 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | - | 9.53 | - | 22.23 | - | 12.7 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | - |
| 24" | 609.6 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | - | 9.53 | 17.48 | 24.61 | - | 12.7 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | - |
| Outside Diameter | Stainless Steel Tube Weight (kg/m) | ||||||
| Birmingham wire Gauge Conversion from BWG to mm | |||||||
| 20 BWG | 18 BWG | 16 BWG | 14 BWG | 12 BWG | 10 BWG | ||
| mm | inch | 0.89 mm | 1.24 mm | 1.65 mm | 2.11 mm | 2.77 mm | 3.4 mm |
| 6.35 | 1/4 | 0.121 | 0.158 | 0.193 | - | - | - |
| 9.53 | 3/8 | 0.192 | 0.256 | 0.324 | 0.39 | 0.466 | - |
| 12.7 | 1/2 | 0.262 | 0.354 | 0.454 | 0.557 | 0.685 | 0.788 |
| 15.88 | 5/8 | 0.332 | 0.452 | 0.585 | 0.724 | 0.905 | 1.057 |
| 19.05 | 3/4 | 0.403 | 0.55 | 0.715 | 0.89 | 1.123 | 1.325 |
| 25.4 | 1 | 0.543 | 0.746 | 0.976 | 1.224 | 1.561 | 1.863 |
| 31.75 | 1 1/4 | 0.684 | 0.942 | 1.237 | 1.558 | 2 | 2.401 |
| 38.1 | 1 1/2 | - | 1.139 | 1.498 | 1.892 | 2.438 | 2.939 |
| 44.5 | 1 3/4 | - | 1.336 | 1.761 | 2.228 | 2.879 | 3.481 |
| 50.8 | 2 | - | 1.531 | 2.02 | 2.559 | 3.314 | 4.014 |
| 63.5 | 2 1/2 | - | - | 2.542 | 3.227 | 4.19 | 5.09 |
| 76.2 | 3 | - | - | 3.064 | 3.894 | 5.067 | 6.166 |
| 88.9 | 3 1/2 | - | - | 3.586 | 4.562 | 5.943 | 7.241 |
| 101.6 | 4 | - | - | 4.108 | 5.229 | 6.819 | 8.317 |
| 114.3 | 4 1/2 | - | - | - | 5.897 | 7.696 | 9.393 |
| Summary | Standards |
| Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes | ASTM A 213 / A 213M |
| Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service | ASTM A269 / A 269M |
| Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes | ASTM A312/A312M |
| Standard Specification for Seamless Stainless Steel Mechanical Tubing and Hollow Bar | ASTM A511 / A 511M |
| Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service | ASTM A789/A789M |
| Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe | ASTM A790/A790M |
| Standard Specification For Seamless Stainless Steel Tubes,cold and hot finished | GOST9941-2022 |
| Standard Specification For Seamless Stainless Steel Tube for Pressure purposes | EN 10216-5 |
| Standard | Outside Diameter Tolerance(mm) | Thickness Tolerance | Length Tolerance (mm) | |||
| 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 A790 |
[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 A269 A789 |
D<12.7 | ±0.13 | ±15% | +3/-0 | ||
| (12.7~38.1] | ±0.13 | ±10% | ||||
| [38.1~88.9) | ±0.25 | +5/-0 | ||||
| [88.9~139.7) | ±0.38 | |||||
| [139.7~203.2) | ±0.76 | |||||
| ASTM A270 | <25.40 | ±0.13 | ±12.5% | +3/-0 | ||
| (25.4~50.8] | ±0.20 | |||||
| (50.8~76.2] | ±0.25 | |||||
| (76.2~101.6] | ±0.38 | |||||
| (101.6~139.7] | ±0.38 | +5/-0 | ||||
| (139.7~203.2] | ±0.75% | |||||
| (203.2~304.8] | ±1.25% | |||||
| EN10216-5 | D3 | ±0.75%/±0.30 | T3 | ±10%/ ±0.20mm | L≤6m | +5/-0 |
| D4 | ±0.5%/±0.10 | T4 | ±7.5% / ±0.15mm | ≥6~12m | +10/-0 | |
| ГОСТ 9941-2022 (except 06ХН28МДТ) |
D<10 | Normal:±0.30 | T<0.3 | Normal:±0.05 mm | +15/-0 | |
| High:±0.03 mm | ||||||
| High:±0.20 | (0.3~0.4] | Normal:±0.07 mm | ||||
| High:±0.05 mm | ||||||
| Higher:±0.15 | (0.4~0.6] | Normal:±0.10 mm | ||||
| High:±0.07 mm | ||||||
| (10~30] | Normal:±0.40 | (0.6~1.0] | Normal:±0.15 mm | |||
| High:±0.10 mm | ||||||
| High:±0.30 | (1~3] D/S <40 |
Normal:+12.5%/-15% | ||||
| High:±12.5% | ||||||
| Higher:±0.20 | Higher:+12.5%/-10% | |||||
| (1~3] D/S >40 |
Normal:±15% | |||||
| (30~95] | Normal:±1.2% | Higher:+12.5%/-15% | ||||
| High:±1% | (3~7] D/S <40 |
Normal:±12.5% | ||||
| Higher:±0.8% | High:+12.5%/-10% | |||||
| D>95 D/S <40 |
Normal:±1.2% | Higher:±10% | ||||
| High:±1% | (3~7] D/S >40 |
Normal:+12.5%/-15% | ||||
| Higher:±0.8% | High:±12.5% | |||||
| D>95 D/S >40 |
Normal:±1.5% | T>7 D<325 |
Normal:+12.5%/-10% | |||
| High:±1.2% | High:±10% | |||||
| Higher:±1.0% | T>7 D>325 |
Normal:+12.5%/-15% | ||||
| High:±12.5% | ||||||


- 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.

Material Testing: All materials undergo rigorous quality control testing prior to shipment to ensure full compliance with applicable standards and customer specifications. The testing program includes the following:
1. Mechanical Testing
2. Hardness Testing
3. Chemical Analysis via Optical Emission Spectrometry (OES)
4. Positive Material Identification (PMI)
5. Flattening Test
6. Flaring Test
7. Intergranular Corrosion (IGC) Testing


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
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.



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.
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASI2431888". Items marked "" are certified.
Company Profile
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.
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.
We always strive to maintain quality throughout our entire entrepreneurial process in order to deliver optimum quality products and achieve customer satisfaction.
About Our Factory & Business Background
- Address
- No. 103, Changhai Road, Wenzhou Industrial Park, Longwan District, Wenzhou, Zhejiang, China
- Terms of Payment
- LC, T/T, D/P
- International Commercial Terms(Incoterms)
- FOB, EXW, CFR, CIF
- Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays - Nearest Port
- Wenzhou port, Ningbo port, Shanghai port
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
- Export Year
- 2017-10-12
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- Do you provide customized product services?
- 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.
- Are you a manufacturer or trader?
- We are manufacturers. We have our own factory to produce and process various kinds of stainless steel /nickel alloy pipes.
- Can we get the some samples?Is there a charge?
- 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.
- Can we visit your factory?
- 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.
- How do you ensure the quality of the product?
- 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.
- What is your delivery time?
- 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.
- Can you arrange shipment?
- 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.
- What if I don't have import experience?
- 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.
Send your message to this supplier
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