321 304 316 Precision Seamless Stainless Steel Pipe for Medicine
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Product Highlights
- Precision Tolerance Control: Tolerance can be controlled within +/-0.05mm, with minimum +/-0.02mm for high precision applications.
- High Pressure Resistance: Withstands high pressure for hydraulic lines and automotive applications with sophisticated bright annealing.
- Flexible Processing Capability: Tube can be flared, flattened, and bent freely without compromising mechanical performance.
- Wide Material Range: Available in 304, 304L, 316, 316L, and other grades meeting ASTM, EN, and DIN standards.
- Customizable Sizes: Outer diameter from 1mm to 250mm and wall thickness from 0.05mm to 50mm available upon request.
- Multiple Delivery Conditions: Offers AP, BA, CFA, and CFP delivery conditions to meet specific application requirements.
- Strict Quality Inspection: Pre-production samples and final inspections before shipment ensure product reliability and consistency.
Product Attributes
- Customization
- Available
- Type
- Seamless
- Technique
- Cold Drawn
- Model NO.
- 304 304L 316 316L 316Ti 321 410
- Material
- Stainless Steel
- Surface Treatment
- Bright Annealed/Polished/Ba+Polishing/Ep
- Usage
- Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Construction & Decoration
- Section Shape
- Round
- Delivery Condition
- Ap, Ba, Cfa, Cfp
- Secondary or Not
- Non-Secondary
- Certificate
- ISO 9001 Ts16949
- Application
- Precision Application
- Transport Package
- Bundles or Boxes
- Specification
- as per standard or request
- Trademark
- CW
- Origin
- China
- HS Code
- 7306610000
- Production Capacity
- 1000ton/Month
Product Images of 321 304 316 Precision Seamless Stainless Steel Pipe for Medicine
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Product Description
Tolerance can control +/-0.05mm, Min +/-0.02mm
2.Good mechanical performance:
Tube can be process freely
3.Tube can be process freely:
Tube can be process freely
4.Low Roughness Mirror Surface:
Inner surface can controal Ra ≤ 0.06mm
5.Withstand High Pressure (HPS BA):
Tube can be used for hydraulic lines
Other sizes and material available upon request
OD: 1mm-250mm WT: 0.05mm- 50mm
Tolerance: OD +/-0.05mm ID +/-0.05mm Other sizes, grades and special tolerance available upon request
Advantage: Sophisticated bright annealing technology makes the tube good mechanical performance,the tube can be flared,flatten,bent freely.

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Hydraulic/Automobile Pipe:
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Good roughness enable tube withstand high pressure and good mechanical performance guarantee tube bent, flared, end process and
others freely, |
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Laboratory gas:
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Puretube BA+ with special drawing procses to reach Ra ≤0.375 regular sizes like 6.35*1, 9.35*1, 12.7*1.24, 25.4*1.65 etc
|
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Food/Beverage:
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High precision with lower tolerance, good mechanical performance
|
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pharmaceutical:
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ID roughness Ra ≤0.6, OD tolerance≤±0.05mm, WT ≤±5% , sizes like 6*1, 8*1, 10*1 and others
|
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Semiconductor:
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Ra ≤0.375 special cleanness for inner diameter
|
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Other application:
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Guage, chemical industry, heat exchanger, precision equipments and others
|
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Standard
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Chemical Composition:
|
||||||||
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Grade
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C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ni
|
Mo
|
|
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ASTM
A269
ASTM
312
|
304
|
≤0.08
|
≤1.00
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≤2.00
|
≤0.045
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≤0.030
|
≤18.0-20.0
|
8.0-11
|
|
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304L
|
≤0.03
|
≤1.00
|
≤2.00
|
≤0.045
|
≤0.030
|
16.0-18.0
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8.0-12
|
|
|
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SUS316
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≤0.08
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≤1.00
|
≤2.00
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≤0.045
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≤0.030
|
16.0-18.0
|
10.0-14.0
|
2-3
|
|
|
SUS316L
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≤0.03
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≤1.00
|
≤2.00
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≤0.045
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≤0.030
|
16.0-18.0
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10.0-15.0
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2-3
|
|
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EN
10216-5
DIN
17458
|
1.4301
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≤0.07
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≤1.00
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≤2.00
|
≤0.040
|
≤0.015
|
17-19.5
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8.0-10
|
|
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1.4307
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≤0.03
|
≤1.00
|
≤2.00
|
≤0.040
|
≤0.015
|
17.5-19.5
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8.0-10.5
|
|
|
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1.4401
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≤0.07
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≤1.00
|
≤2.00
|
≤0.040
|
≤0.015
|
16.5-18.5
|
10.0-13.0
|
2-2.5
|
|
|
1.4404
|
≤0.03
|
≤1.00
|
≤2.00
|
≤0.040
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≤0.015
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16.5-18.5
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10.0-13.0
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2-2.5
|
|
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Standard
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Mechanical phosphated
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|||
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YS(Mpa)
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TS(Mpa)
|
EL(%)
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HRB
|
|
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ASTM
A269
ASTM
312
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≥205
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≥515
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≥35
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≤90
|
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≥170
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≥485
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≥35
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≤90
|
|
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≥205
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≥515
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≥35
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≤90
|
|
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≥170
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≥485
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≥35
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≤90
|
|
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EN
10216-5
DIN
17458
|
≥195
|
500-700
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≥35
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≤90
|
|
≥180
|
460-680
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≥35
|
≤90
|
|
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≥205
|
510-710
|
≥35
|
≤90
|
|
|
≥190
|
490-690
|
≥35
|
≤90
|
|
| hydraulic tubing | bundy tube | automotive tube |
| steel forging | pipe as per application | pipe assembly |
| precision pipe | special shape pipe | stainless pipe |
1. who are we?
We are based in Jiangsu, China, start from 2010,sell to Eastern Asia(20.00%),Mid East(20.00%),Eastern Europe(15.00%),Southeast Asia(15.00%),Northern Europe(10.00%),Domestic Market(10.00%),South America(5.00%),Western Europe(5.00%),South Asia(0.00%),North America(0.00%),Oceania(0.00%),Southern Europe(0.00%),Central America(0.00%),Africa(0.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production; Always final Inspection before shipment;
3.what can you buy from us?
Steel Pipe, Seamless Pipe, Hydraulic Oil Tube, Precision Tube, Stainless Steel Tube
4. why should you buy from us not from other suppliers?
Production: Advanced production line and drawing with special oil to make the surface in best condition. Lower roughness and good mechanical performance. Inspection before delivery: Professional team for inspection and randomly check
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU; Accepted Payment Currency:USD,EUR,HKD,CNY; Accepted Payment Type: T/T,L/C,MoneyGram; Language Spoken:English,Chinese,Spanish,Japanese

Chewit International Chewit international Located in zhangjiagang city which is along The Yangtze Golden Channel the junction of River and Coast Economic Belt. It owns an excellent geographic position, as it is close to Nanjing city in the north, adjacent to Suzhou and Wuxi cities in the south, next to Shanghai international city in the east. Zhangjiagang international port and State highway endow us a convenient water and land transportation which links us to the outside world both home and aboard. Chewit International is one group company with two manufactures one is producing steel forgings for Marine, Power, Boiler, Ocean, Oil, Petrochemical, Mechanical and Hydraulic fields and the other is producing precision steel tubes for automotive industry and hydraulic system and also one semi-independent company specially for import and export business. We have a total area of 150000 square meters with the employees over 200 people. All the products well produced by our mills need to be double inspected by chewit professional quality controller and then we will offer our customer the vivid report for the tested items. Only those products which are inspected well can be allowed to delivery to our customers. By the means of strict inspection, we wined a lot of customer for long term business both home and abroad.We adhere to our company tenet Customer First, Quality formost and always try our best to serve our customer with our full heart.
About the Supplier
This supplier has been audited by SGS. Verify the report on the official SGS website with ID "QIP-ASI204814". Items marked "" are certified.
Company Profile
Chewit international has two manufacture. One is for precision stee pipe --- CW tube. Another is manufacture steel forgings.
CW tube, one of the most professional precision tube supplier in China, has a history of more than 20 years.
Our product includes cold drawn precision seamless steel tube, cold drawn welded tube, welded stainless steel tube, tube assambly. Our tubes are used for automotive industry, hydraulic system, Mechanical fields, precision device and others.
Our company covers a toal area of 10000 square meters with the asset of more than 10 million. We have around 120 employees...Due to the advanced production line and full sets of inspection equipments, the tubes produced are promised to be in high quality.
We have ten cold drawn lines, two lines of 20 tons, three lines of 10 tons, five lines of 5 tons to promise the mass output. We use special cold drawing process to make sure the inner and outer surface in low roughness. And the precision drawing mold to garanttee the minimum size tolerance.
We have heat treatment furnace with and without oxygen environment for processing. The bright annealing furnace without oxygen to ensure the tube surface condition best without oxidization and shinning like mirror.
We have a strong and responsible inspection team. All the tubes have to pass eddy current non-destructive test, and ultrosonic non-destructive test as per customer request. We check the tube size and surface 100%. Chemical and mechanical tests are carried out for each batch of tube.
Our forging manufacture covers total area above 100000m2 with with a production capacity of 90000 tons for various kinds of forgings. Also we are eligible for a total of 11 authorized patents, including 3 invention patents.
We are supplier of Wind Power, Oil & gas, Transportation, Ship building, gear box...
We own TPG, API 20B, the European PED, MAN Diesel & Turbo, Classification society: ABS, CCS, BV, DNV, GL, LR, KR, RINA, NK.
Since 2006, we have entered into global purchasing system of the most famous company.
We have established a perfect quality management system and HSE management system. We have API Q1, ISO 9001, ISO 14001: 2004, OHSAS 18001: 2007.
We always adhere to a pragmatic, integrity, unity and innovative as business philosophy.
Scientific management, improving quality, continuous improvement, and pursuit of excellence in quality, to provide customers with first-class forging products and perfect technical services.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- 73 East Changjiang Road, Deji, Jingang Town, Zhangjiagang City, Suzhou, Jiangsu, China
-
Plant Area
- 100 square meters
-
Number of Employees
- 6
-
Registered Capital
- 3,000,000 RMB
-
Terms of Payment
- LC, T/T
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR
-
Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: one month -
Nearest Port
- shanghai
Our Production Capability & Technical Expertise
-
Main Products
- Carbon Seamless Pipe, Steel Forging, Stainless Tube
-
Production Machines
- Cutting Machine, Heat Treating Machine, Stretching Machine, Straightening Machine, Diagnostic Machine, Cutting Machine, Hydraulic Universal Testing Machine
-
OEM Service Available
- Yes
-
Test Reports for Raw Materials
- RoHS, Others
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2010-01-12
- Export Year
- 2013-08-01
-
Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea)
-
Number of Foreign Trading Staff
- 4
-
Overseas Agent/Branch
- No
FAQ
- What is the tolerance range for the pipe?
- Tolerance can be controlled within +/-0.05mm, with a minimum of +/-0.02mm for high precision needs.
- Can the tube be processed freely?
- Yes, the tube can be flared, flattened, and bent freely due to its good mechanical performance.
- What materials are available?
- Available materials include 304, 304L, 316, 316L, and other grades meeting ASTM, EN, and DIN standards.
- What are the size specifications?
- Outer diameter ranges from 1mm to 250mm, and wall thickness ranges from 0.05mm to 50mm.
- How do you guarantee quality?
- We provide pre-production samples before mass production and conduct final inspections before shipment.
- What delivery conditions are accepted?
- Accepted delivery conditions include AP, BA, CFA, and CFP based on specific application needs.
- What payment terms do you accept?
- We accept T/T, L/C, MoneyGram, and other payment types in USD, EUR, HKD, and CNY.
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