Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of 16mm stainless steel tube in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
16mm Stainless Steel Tube – 304/316L Seamless & Welded Tubing
Xi'an Dongmeng Group Co., Ltd. supplies 16mm stainless steel tubes for international industrial buyers, including equipment manufacturers, engineering contractors, OEM fabricators and distributors. Our product range covers 304, 304L, 316 and 316L stainless steel tubing in seamless and welded configurations, with wall thickness, surface finish and inspection requirements selected according to the intended application.
With a nominal outside diameter of 16.00mm (0.630 inch), these tubes are used in instrumentation assemblies, fluid-handling equipment, heat-transfer systems and precision mechanical components. Procurement support includes dimensional specification review, material documentation and customized delivery requirements.
What Is a 16mm Stainless Steel Tube?
A 16mm stainless steel tube is a circular hollow section with a nominal outside diameter of 16 millimeters.
Unlike nominal pipe sizes, which are assigned according to established piping dimensional systems, 16mm tubing is generally ordered by its actual outside diameter and wall thickness.
For example:
16 × 1.0mm: 16mm outside diameter and 1.0mm nominal wall thickness.
16 × 1.5mm: 16mm outside diameter and 1.5mm nominal wall thickness.
16 × 2.0mm: 16mm outside diameter and 2.0mm nominal wall thickness.
The actual inside diameter is calculated from the outside diameter and twice the wall thickness.
The selection of seamless or welded tubing depends on pressure requirements, operating temperature, corrosion conditions, dimensional tolerances and the relevant material specification.
For critical systems, tubing must be qualified against the applicable engineering code and project requirements rather than selected on nominal size alone.
16mm Stainless Steel Tube Specifications
| Parameter | Specification |
|---|---|
| Product | Round Stainless Steel Tube |
| Nominal Outside Diameter | 16.00mm |
| Imperial Conversion | 0.6299 inch |
| Reference Wall Thickness | 0.5–3.0mm |
| Reference Inside Diameter | 10.0–15.0mm |
| Common Material Grades | 304 / 304L / 316 / 316L |
| Manufacturing | Seamless / Welded |
| Typical Length Options | 3m / 6m / Custom Cut |
| Heat Treatment | According to applicable product standard |
| Surface Condition | Pickled / Bright Annealed / Polished |
| Dimensional Tolerance | According to applicable standard and approved order |
| Tube Ends | Plain Cut / Deburred / Prepared as Specified |
| Material Traceability | Heat Number and MTC as agreed |
| Packaging | Protected Bundles / Wooden Cases |
The dimensions above represent reference configurations for procurement planning. Manufacturing availability and tolerances must be confirmed before ordering.
16mm Stainless Steel Tube Wall Thickness & ID Chart
The following table helps buyers select the nominal internal diameter for different wall thicknesses.
| OD (mm) | Wall Thickness (mm) | Nominal ID (mm) | Approx. Weight (kg/m) |
|---|---|---|---|
| 16 | 0.5 | 15.0 | 0.193 |
| 16 | 0.8 | 14.4 | 0.303 |
| 16 | 1.0 | 14.0 | 0.374 |
| 16 | 1.2 | 13.6 | 0.442 |
| 16 | 1.5 | 13.0 | 0.542 |
| 16 | 2.0 | 12.0 | 0.698 |
| 16 | 2.5 | 11.0 | 0.841 |
| 16 | 3.0 | 10.0 | 0.972 |
Calculation Notes
Nominal Inside Diameter:
ID = OD − 2 × Wall Thickness
Approximate Theoretical Weight for 304 Stainless Steel:
Weight (kg/m) = 0.02491 × WT × (OD − WT)
Where OD and WT are expressed in millimeters.
Weights are theoretical values based on an approximate density of 7.93g/cm³. Actual weights vary with grade, dimensional tolerance and manufacturing condition.
Important Dimensional Considerations
A 16mm OD stainless steel tube is not dimensionally identical to a 5/8-inch tube.
16mm OD = 0.6299 inch
5/8-inch OD = 15.875mm
Difference = 0.125mm
This difference may affect compression fittings, precision assemblies and other closely toleranced connections.
Similarly, NPS 1/2 pipe has a standard outside diameter of approximately 21.3mm and must not be confused with 16mm OD tubing.
Buyers should confirm whether their drawings specify an exact metric diameter, fractional-inch tube size or nominal pipe size.
Available Stainless Steel Grades
304 Stainless Steel Tube
Type 304 is an austenitic stainless steel offering good general corrosion resistance, formability and weldability.
Common applications include general engineering equipment, architectural components and industrial systems exposed to moderately corrosive environments.
304L Stainless Steel Tube
304L has reduced carbon content compared with conventional 304 stainless steel.
The lower carbon content helps reduce the risk of sensitization-related intergranular corrosion associated with welding.
It is frequently selected for welded assemblies and fabricated equipment where general corrosion resistance is sufficient.
316 Stainless Steel Tube
316 stainless steel contains molybdenum, which improves resistance to localized corrosion in many chloride-containing environments compared with 304.
It is commonly considered for chemical processing equipment, industrial fluid systems and equipment exposed to moderately aggressive service conditions.
316L Stainless Steel Tube
316L combines molybdenum alloying with reduced carbon content.
It is a common choice for welded process equipment, instrumentation assemblies and corrosion-resistant tubing systems where both weldability and material resistance are important.
However, 316L is not immune to chloride pitting, crevice corrosion or chloride stress corrosion cracking.
Material selection must consider chloride concentration, temperature, pH, oxygen availability and operating conditions.
Chemical Composition of 304, 304L, 316 & 316L Stainless Steel
The following values provide a general reference for commonly specified AISI/UNS stainless steel grades.
| Grade | UNS | Carbon Max. | Chromium | Nickel | Molybdenum |
|---|---|---|---|---|---|
| 304 | S30400 | 0.08% | 18–20% | 8–11% | - |
| 304L | S30403 | 0.03% | 18–20% | 8–12% | - |
| 316 | S31600 | 0.08% | 16–18% | 10–14% | 2–3% |
| 316L | S31603 | 0.03% | 16–18% | 10–14% | 2–3% |
Composition is expressed as mass percentage.
These are general reference limits rather than a substitute for the chemical composition tables in the specified ASTM or EN product standard. Exact acceptance limits, including carbon and other residual elements, must follow the applicable standard edition and purchase order.
Why Chemical Composition Matters
Chromium contributes to the formation of the protective passive film responsible for stainless steel's corrosion resistance.
Nickel stabilizes the austenitic structure and contributes to formability and toughness.
Molybdenum improves resistance to localized corrosion in a range of environments.
Lower carbon content in 304L and 316L helps reduce susceptibility to intergranular corrosion after welding when sensitization would otherwise be a concern.
Mechanical Properties
| Grade | Minimum Tensile Strength | Minimum Yield Strength | Minimum Elongation |
|---|---|---|---|
| 304 | 515 MPa | 205 MPa | 35% |
| 304L | 485 MPa | 170 MPa | 35% |
| 316 | 515 MPa | 205 MPa | 35% |
| 316L | 485 MPa | 170 MPa | 35% |
These values are commonly referenced for ASTM A269-grade tubing in the annealed condition.
Final mechanical acceptance criteria depend on the product standard, grade, condition, dimensions and specified testing requirements.
Cold-worked or specially processed tubing may exhibit different mechanical properties.
Physical Properties
| Property | Typical Reference Value |
|---|---|
| Density, 304/304L | Approximately 7.93g/cm³ |
| Density, 316/316L | Approximately 7.98–8.00g/cm³ |
| Elastic Modulus | Approximately 193 GPa |
| Microstructure | Austenitic |
| Magnetic Response | Generally low in solution-annealed condition |
Cold forming or welding may alter the magnetic response of austenitic stainless steel.
Seamless vs Welded 16mm Stainless Steel Tube
Both manufacturing routes can produce suitable stainless steel tubing when the product meets the correct specification and service requirements.
| Feature | Seamless Tube | Welded Tube |
|---|---|---|
| Manufacturing | Produced without a longitudinal weld | Produced from formed strip with a longitudinal weld |
| Weld Seam | None | Present |
| Dimensional Control | Depends on finishing process | Depends on forming and finishing process |
| Surface Quality | Process-dependent | Process-dependent |
| Relative Cost | Often higher | Often more economical |
| Typical Applications | Instrumentation and demanding engineered systems | General industrial, equipment and mechanical uses |
| Inspection | According to selected standard | Includes applicable weld-related requirements |
When to Choose Seamless Tubing
Seamless tubing may be preferred where the approved engineering specification requires a seamless product or where service conditions make weld-seam qualification particularly important.
When to Choose Welded Tubing
Welded tubing may be suitable for general industrial applications and engineered systems where the applicable standard permits welded construction.
Important: Seamless construction does not automatically establish a higher allowable working pressure. Pressure ratings must be determined from the material, dimensions, operating temperature, relevant design code and permitted manufacturing route.
Stainless Steel Tube Standards & Delivery Requirements
The correct product standard must be selected according to the intended application.
| Standard | Product Scope | Typical Application |
|---|---|---|
| ASTM A269/A269M | Seamless and welded austenitic tubing | General corrosion-resistant service |
| ASTM A213/A213M | Seamless boiler, superheater and heat-exchanger tubing | Specified heat-transfer equipment |
| ASTM A249/A249M | Welded austenitic boiler, superheater and heat-exchanger tubing | Specified welded heat-exchanger applications |
| ASTM A554 | Welded stainless steel mechanical tubing | Mechanical and decorative applications |
| ASTM A270/A270M | Seamless and welded austenitic sanitary tubing | Hygienic-processing equipment |
| EN 10216-5 | Seamless stainless steel tubes for pressure purposes | European pressure applications |
| EN 10217-7 | Welded stainless steel tubes for pressure purposes | European welded pressure applications |
A product manufactured to ASTM A554 must not automatically be treated as pressure-rated tubing.
Similarly, an ASTM A269 material certificate alone does not establish suitability for every pressure system.
Pressure-related applications require confirmation of the complete engineering specification, including the applicable design code.
Material Grade Cross-Reference
| AISI Grade | UNS | Common EN Material Number |
|---|---|---|
| 304 | S30400 | 1.4301 |
| 304L | S30403 | 1.4307 / 1.4306 |
| 316 | S31600 | 1.4401 |
| 316L | S31603 | 1.4404 / 1.4435 |
The designation tables provide common material relationships. Similar grade names across different standards do not guarantee identical chemical limits, mechanical requirements or delivery conditions.
Surface Finishes & Custom Processing
The surface condition of a 16mm stainless steel tube can influence appearance, cleanliness, corrosion performance and assembly compatibility.
Pickled Finish
Pickling removes heat-treatment scale and surface oxides through a controlled chemical treatment.
It is commonly associated with annealed industrial stainless steel tubing.
Bright Annealed Finish
Bright annealing is carried out in a controlled atmosphere to limit oxidation during heat treatment.
It can provide a relatively clean and smooth surface without conventional post-annealing pickling.
Polished Finish
Mechanical polishing can be specified for applications requiring improved appearance or a particular surface roughness.
When surface roughness is critical, buyers should specify a measurable Ra requirement rather than using a general term such as "mirror finish."
Customized Processing
Project-specific processing options may include:
Precision cutting to length
Tube-end deburring
Specified surface polishing
Tube bending to approved drawings
Additional dimensional inspection
Special handling and surface protection
For bending applications, the minimum bend radius and acceptable ovality must be assessed against the tube diameter, wall thickness, material condition and bending method.
Industrial Applications of 16mm Stainless Steel Tubing
1. Instrumentation & Process Control
16mm OD stainless steel tubing may be selected for engineered instrumentation assemblies, fluid sampling systems and industrial control installations.
The tubing specification must be compatible with the selected fittings, pressure rating and operating environment.
2. Heat Exchangers & Thermal Equipment
Stainless steel tubes are used in condensers, heat-transfer equipment and compact thermal systems.
The selected tube standard, wall thickness, thermal performance and inspection requirements must match the equipment design.
3. Chemical Processing Equipment
304L and 316L tubing can be considered for chemical processing assemblies where their corrosion resistance is appropriate for the specified media.
Chemical compatibility should be established using operating temperature, concentration and corrosion data.
4. Precision Mechanical Components
Small-diameter stainless tubing is used in machinery, equipment frames, support assemblies and fabricated components.
Dimensional repeatability, straightness and the required surface condition are important selection factors.
5. Food & Hygienic Equipment
16mm tubing may be used in auxiliary equipment and selected process assemblies.
For direct hygienic product-contact service, purchasers should specify an appropriate sanitary tubing standard, internal surface finish, cleaning requirements and applicable system certification.
A standard industrial tube should not automatically be classified as sanitary tubing.
Corrosion Resistance & Grade Selection
The corrosion performance of stainless steel depends on both material composition and environmental conditions.
304 and 304L are commonly selected for general industrial environments where aggressive chlorides are not a controlling factor.
316 and 316L contain molybdenum and generally offer improved resistance to chloride-induced localized corrosion compared with 304-family stainless steels.
However, stagnant chloride-containing liquids, deposits, narrow crevices and elevated operating temperatures can accelerate corrosion even in 316L tubing.
For applications involving seawater, concentrated chlorides, strongly acidic media or elevated-temperature chloride exposure, a detailed materials assessment may identify the need for a higher-alloy material.
Grade Selection Guide
| Operating Requirement | Material Selection Consideration |
|---|---|
| General industrial use | 304 / 304L |
| Welded general-purpose equipment | 304L |
| Increased resistance to chloride-related localized corrosion | 316 / 316L |
| Welded chemical-processing assemblies | 316L, subject to compatibility review |
| Severe chloride exposure | Higher-alloy materials may be required |
Inspection & Quality Assurance
Xi'an Dongmeng Group Co., Ltd. supports inspection and documentation arrangements according to the agreed purchase specification.
Material Verification
Positive Material Identification (PMI) can be specified to verify alloy identity, particularly when distinguishing molybdenum-containing 316/316L from 304-family material.
PMI methods must be selected appropriately; conventional handheld XRF does not reliably establish the low carbon content needed to distinguish L grades.
Dimensional Inspection
Dimensional inspection can include:
Outside diameter
Wall thickness
Length
Straightness
Ovality
Internal diameter, where specified
Surface condition
Additional tolerance requirements should be agreed before production.
Mechanical & Nondestructive Testing
Depending on the applicable standard and agreed inspection plan, testing may include:
Tensile testing
Hardness testing
Flattening or flaring tests
Hydrostatic testing
Eddy current testing
Other specified nondestructive examinations
The exact test method and frequency must follow the applicable product specification.
Material Test Certificates
Material documentation may include:
Material grade and specification
Heat or lot identification
Chemical composition
Mechanical test results
Relevant inspection records
EN 10204 3.1 certification when specified
Third-party inspection may be arranged when included in the approved order.
Packaging & International Shipping
Appropriate packaging helps protect small-diameter stainless steel tubes during handling, storage and international transportation.
Available packaging arrangements may include:
Protected tube bundles
End caps or end protection where specified
Protective wrapping
Wooden cases
Export packing with identification labels
Packaging selection should consider the tube length, surface finish, total shipment weight and destination handling requirements.
Special requirements for moisture protection, surface cleanliness or individual tube separation should be stated in the purchase order.
Why Choose Xi'an Dongmeng Group Co., Ltd.?
Technical Product Selection
We support customers in identifying the required stainless steel grade, tube size, manufacturing method and applicable product standard.
Custom Procurement Requirements
Buyers can submit drawings and technical specifications for dimensional review, cutting requirements and surface finishing options.
Inspection & Documentation Support
Project-specific inspection and material documentation requirements can be reviewed before order confirmation.
Global B2B Supply
Our services are oriented toward industrial distributors, OEM manufacturers, equipment fabricators and engineering procurement teams purchasing materials for international projects.
We focus on clear technical communication and specification-based quotations to help buyers compare materials and evaluate suitable supply options.
Frequently Asked Questions
1. What is the outside diameter of a 16mm stainless steel tube?
The nominal outside diameter is 16.00mm, equivalent to approximately 0.6299 inch. The actual permitted dimensional variation depends on the ordered specification.
2. Is 16mm stainless steel tube the same as 5/8-inch tubing?
No. A 5/8-inch tube has an outside diameter of 15.875mm, which is 0.125mm smaller than 16.00mm.
3. What wall thicknesses are available for 16mm stainless steel tubing?
Common reference wall thicknesses include 0.5, 0.8, 1.0, 1.2, 1.5, 2.0, 2.5 and 3.0mm. Availability must be confirmed for the selected grade, manufacturing route and order quantity.
4. What is the inside diameter of a 16 × 1.5mm stainless steel tube?
The nominal inside diameter is 13.0mm.
Calculation:
16 − (2 × 1.5) = 13.0mm.
5. Which is better for corrosion resistance, 304 or 316L?
316L generally provides improved resistance to localized corrosion in many chloride-containing environments due to its molybdenum content. However, the correct choice depends on the complete operating environment.
6. Can 16mm stainless steel tubing be used for high-pressure applications?
It may be suitable for certain engineered pressure applications, but the allowable working pressure cannot be determined from the 16mm outside diameter alone.
The wall thickness, material condition, operating temperature, selected fittings, applicable design code and inspection requirements must be evaluated.
7. What is the difference between seamless and welded 16mm tubing?
Seamless tubing is manufactured without a longitudinal weld. Welded tubing is produced by forming and longitudinally welding stainless steel strip.
Both manufacturing methods can meet appropriate industrial specifications.
8. Can 16mm stainless steel tube be bent?
Yes, depending on material grade, condition, wall thickness and the required bend radius. Tight bends may require specialized tooling or a mandrel to control wall thinning and ovality.
9. Is ASTM A269 suitable for 16mm stainless steel tube?
ASTM A269/A269M covers seamless and welded austenitic stainless steel tubing for general service. It can be appropriate for 16mm tubing when the material grade, dimensions and other ordering requirements fall within the specification.
10. Can you provide material certificates and customized tube lengths?
Material certification, customized lengths and additional inspection arrangements can be discussed when submitting a purchase inquiry. The required documentation and processing details should be confirmed before order placement.
Request a Quote – 16mm Stainless Steel Tube
Xi'an Dongmeng Group Co., Ltd. welcomes inquiries from industrial distributors, equipment manufacturers, fabricators and engineering procurement teams.
To receive a specification-based quotation, please provide:
Material grade: 304 / 304L / 316 / 316L
Outside diameter: 16.00mm
Required wall thickness
Seamless or welded construction
Applicable product standard
Required tube length and quantity
Surface finish and dimensional tolerance
Inspection and MTC requirements
Delivery destination and required shipping terms
Our team can review your requirements and provide relevant product information, available supply options and a quotation based on the confirmed technical specification.
Office Information
Company: Xi'an Dongmeng Group Co., Ltd.
Phone / WhatsApp: +86 157 6921 4734
Email: office@dongmjd.com
Office Address: Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province, China
Contact our team to request pricing, discuss technical drawings or confirm material documentation requirements.
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