1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube
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Product Highlights
- Manufactured from premium SS316L stainless steel, providing excellent corrosion resistance and long service life in harsh industrial and chemical environments.
- Produced in accordance with ASTM A269 standards, ensuring consistent dimensions, mechanical strength, and reliable performance for instrumentation applications.
- The Bright Annealed (BA) surface offers improved cleanliness, smooth internal finish, and reduced contamination risk, making it suitable for high purity gas systems.
- Designed for use in instrumentation tubing systems, process control lines, analyzer systems, and gas distribution networks where dimensional accuracy is critical.
- The low-carbon SS316L material provides superior weldability and is ideal for bending, routing, and installation in complex tubing systems.
- Suitable for oil & gas, petrochemical, semiconductor, pharmaceutical, biotechnology, laboratory, hydrogen energy, and industrial automation industries.
- Besides SS316L, Nai-Lok also supplies tubing in:SS304 / SS304L; SS316 / SS316L; 904L; Super Duplex 2507; Alloy 400 (UNS N04400); Alloy 625 (UNS N06625); Alloy 825 (UNS N08825); Hastelloy C276
Product Attributes
- Customization
- Available
- Standard
- ASTM
- Application
- Instrumentation System / Gas System / Hydraulic Sy
- Model NO.
- TSSM Series
- Product Name
- Stainless Steel Instrumentation Tubing
- Material
- Stainless Steel 316L / SS316L
- Tube Type
- Seamless Instrumentation Tube
- Material Standard
- ASTM A269 Tp316L
- Surface Finish
- Bright Annealed (Ba) / Electropolished(Ep)
- Outer Diameter
- 1/8-6 Inch; Metric 4mm-50mm
- Wall Thickness
- 0.28mm-2.11mm
- Length
- 4m/6m/Customized
- Working Medium
- Gas / Liquid / Chemical Fluid
- Medium
- Gas
- Cross-Section Shape
- Round
- Purity Level
- High Purity
- Connection Type
- Tube Fitting Connection
- Transport Package
- Box Packing, Carton Box, Wooden Case
- Specification
- 1/8-4''
- Trademark
- NAI-LOK
- Origin
- China
- HS Code
- 7304419000
- Production Capacity
- 10000/Month
Product Images of 1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube
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1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube -
1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube -
1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube -
1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube -
1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube -
1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube -
1/4" SS316L Stainless Steel Instrumentation Tubing ASTM A269 Bright Annealed Seamless Tube
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Product Description
NAI-LOK SS316L Seamless Instrumentation Tube 1/4 Inch ASTM A269 Bright Annealed Stainless Steel Tubing
NAI-LOK SS316L Seamless Instrumentation Tubing is manufactured according to ASTM A269 standards for high-performance fluid and gas control systems. Our stainless steel seamless tube is produced from premium 316L stainless steel material with excellent corrosion resistance, smooth internal surface, and precise dimensional tolerance.
The bright annealed seamless tubing provides outstanding cleanliness, pressure resistance, and leak-free performance for instrumentation systems, gas lines, hydraulic systems, chemical processing, and laboratory applications. Compared with welded tubing, seamless stainless steel tubing offers better structural integrity, higher pressure capability, and improved reliability in critical applications.
This ASTM A269 SS316L seamless tube features a polished surface finish and stable wall thickness, making it suitable for high purity gas systems, analytical instrumentation, semiconductor equipment, petrochemical plants, and industrial fluid systems.
NAI-LOK precision stainless steel tubing is available in multiple sizes including 1/4", 3/8", 1/2", and metric tubing dimensions. Customized length, wall thickness, and surface treatment are also available according to customer requirements.
The seamless construction eliminates welded joints, improving pressure integrity and reducing the risk of leakage in critical service conditions. Combined with the excellent corrosion resistance of SS316L, this tubing performs reliably in aggressive environments including chemical processing plants, offshore platforms, semiconductor facilities, and pharmaceutical production systems.
Nai-Lok instrumentation tubing is widely used for:
Instrumentation & Process Control
- Pressure sensing lines
- Flow measurement systems
- Analyzer sample lines
- Instrument air systems
Gas Distribution Systems
- Nitrogen systems
- Hydrogen systems
- Oxygen systems
- Specialty gas systems
- Calibration gas systems
Semiconductor & High Purity Applications
- High purity gas distribution
- Semiconductor process gas systems
- Gas cabinets
- Gas panels
- UHP gas delivery systems
Industrial & Energy Applications
- Oil & gas instrumentation
- Petrochemical facilities
- Hydrogen energy systems
- Power generation plants
- Offshore and marine projects
Features
1. Tubes according to ASTM A269/270, ASME BPE
2. Bright annealing seamless tube
3. For high purity pipeline and laboratory
Material : 304/304L 316/316L
Size Tube: 1/4"~6" Pipe:8"~32"/6A~800A
Tubes : According to ASTM A269/270,ASME BPE
Pipes : According to ASTM A312,JIS G 3459
Length : 6000MM(Optional:4000mm:6100mm)(+/-10% possible)
Tubes Tolerance: According to ASTM A269/A632
Tube fittings : Pre-material according to ASTM A269/A632/A312
Pipe Fittings : Pre-material according to ASTM A403(pipe)/JIS B 2312/2313
Pipe Tolerance: According to ASTM A312,JIS G 3459
Ends: Tubes and fittings are prepared for orbital welding
Applications
- Instrumentation systems
- Gas distribution systems
- High purity gas lines
- Hydraulic control systems
- Petrochemical industry
- Semiconductor equipment
- Laboratory gas systems
- Chemical processing plants
- Oil & gas applications
- Analytical sampling systems
As a professional manufacturer of instrumentation valves, tube fittings, manifolds, pressure regulators, ball valves, needle valves, check valves, seamless tubing, and high purity fluid system components, Nai-Lok provides complete fluid and gas system solutions for customers worldwide.
In addition to stainless steel tubing, we manufacture products in various corrosion-resistant alloys including Monel 400, Alloy 625, Alloy 825, Hastelloy C276, Duplex 2205, Super Duplex 2507, and 904L to meet demanding service requirements.
| Item | Specification |
|---|---|
| Brand | NAI-LOK |
| Product Name | SS316L Seamless Instrumentation Tube |
| Material | SS304 / SS316L/Special Alloy |
| Outer Diameter (OD) | 1/4", 3/8", 1/2", 3/4", 1", 1.5", 2" ,3'', 4''(custom available) |
| Wall Thickness | 0.5 mm - 2.0 mm (customized) |
| Length | 6000 mm (standard), customizable on request |
| Surface Finish (Inner) | Bright Annealed(BA), Electropolished (EP), |
| Surface Finish (Outer) | Mirror Polished / Bright Annealed |
| Standard | ASTM A269 / A270 / A213 / A632 |
| Pressure Rating | Up to 6000 psi (depends on OD & wall thickness) |
| Testing | 100% Eddy Current, PMI, Hydrostatic Test |
| Certification | ISO 9001:2015, Material Certificate (EN 10204 3.1) |
| Applications | Instrumentation / Gas / Hydraulic System |
| Grade | ASTM | UNS | ASME |
| 316 | A213/A269 TP316 | S31600/S31603 | SA213 |
| 316L | A213/A269 TP316L | S31600/S31603 | SA213 |
Ordering Informatin
| Part Number | Tube OD(in) | Wall Thickness(in) | Length(mm) |
| TSSM-02T028L06 | 1/8 | 0.028 | 6000 |
| TSSM-04T035L06 | 1/4 | 0.035 | 6000 |
| TSSM-04T049L06 | 1/4 | 0.049 | 6000 |
| TSSM-04T065L06 | 1/4 | 0.065 | 6000 |
| TSSM-06T035L06 | 3/8 | 0.035 | 6000 |
| TSSM-06T049L06 | 3/8 | 0.049 | 6000 |
| TSSM-06T065L06 | 3/8 | 0.065 | 6000 |
| TSSM-08T035L06 | 1/2 | 0.035 | 6000 |
| TSSM-08T049L06 | 1/2 | 0.049 | 6000 |
| TSSM-08T065L06 | 1/2 | 0.065 | 6000 |
| TSSM-10T065L06 | 5/8 | 0.065 | 6000 |
| TSSM-12T065L06 | 3/4 | 0.065 | 6000 |
| TSSM-16T083L06 | 1 | 0.083 | 6000 |
| TSSM-20T095L06 | 1-1/4 | 0.095 | 6000 |
| TSSM-20T120L06 | 1-1/4 | 0.120 | 6000 |
| TSSM-24T120L06 | 1-1/2 | 0.120 | 6000 |
| TSSM-24T134L06 | 1-1/2 | 0.134 | 6000 |
| TSSM-32T134L06 | 2 | 0.134 | 6000 |
| TSSM-32T188L06 | 2 | 0.177 | 6000 |
Why Choose NAI-LOK
NAI-LOK specializes in precision stainless steel instrumentation tubing and fluid system products. Our seamless stainless steel tubes are strictly inspected to ensure stable quality, excellent surface finish, and reliable performance for industrial instrumentation applications worldwide.
We provide:
- Stable production capacity
- Fast delivery
- OEM customization
- Professional export packaging
- Strict quality inspection
- Global technical support
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASI264759". Items marked "
" are certified.
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Company Profile
Established in 2000, NAI-LOK has made a name of itself in the list of top suppliers of in China. We focus on the production, research and development, sales of instrumentation valves and alloy valves. We have more than 20 years of precision valve manufacturing and 10 years of export experience.
Our strict control and management of the entire production process enables us to provide products that meet our customers' requirements for product safety, functionality and design at competitive prices, while ensuring the shortest lead times in the market.
We have the capability to manufacture and supply 4 different product categories, including:
1. General Instrumentation Valves and Fittings
2. High Purity & Ultra High Purity Products- NAI-LOK UHP PRODUCTS, Regulator, Bellows Valve, 3 PC high purity ball valve, Diaphragm Valve, Weld Fitting, Face seal Fitting, Gas Stick.
3. Hose & Tubing
4. Special Alloy Valves, fitting and tubings. Including material S31254 (6 Moly), Alloy 400, HC-276, C22, B3, Alloy 625, Duplex steel 2205 /2507 etc.
We hope there will be opportunities for cooperation.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- 397 Damuqiao Road, Shaxi Town, Taicang City, Suzhou, Jiangsu, China
-
Terms of Payment
- LC, T/T
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
- Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: one month -
Nearest Port
- Shanghai Port
-
Minimum Order Quantity
- 1 Piece
Our Production Capability & Technical Expertise
- Main Products
- Gas Delivery System, Ball Valve, Pressure Regulator, Alloy Valve, 2/3/5 Valve Manifold, Instrumentation Ball Valves, Sample Cylinder, Pipe & Tube Fittings, Needle Valve, Hose & Tubing
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
-
Repeat Buyers Choice
- 50%~80%
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015, ISO14001
FAQ
- What is ASTM A269 stainless steel tubing?
- ASTM A269 is a standard specification covering seamless and welded austenitic stainless steel tubing used for general service, instrumentation, and corrosion-resistant applications.
- Why choose SS316L instrumentation tubing?
- SS316L instrumentation tubing provides excellent corrosion resistance, low carbon content, superior weldability, and long service life in industrial and high purity systems.
- What is Bright Annealed (BA) tubing?
- Bright Annealed tubing is heat treated in a controlled atmosphere to produce a clean, smooth, and bright surface finish suitable for instrumentation and gas service applications.
- What industries use instrumentation tubing?
- Instrumentation tubing is widely used in: Oil & Gas,Petrochemical,Semiconductor,Pharmaceutical,Biotechnology,Laboratory & Research, Power Generation,Hydrogen Energy
- Is seamless tubing better than welded tubing?
- For many instrumentation applications, seamless stainless steel tubing offers higher pressure integrity, improved reliability, and reduced leakage risk.
- Can this tubing be used for hydrogen service?
- Yes. SS316L seamless instrumentation tubing is commonly used in hydrogen systems, gas distribution networks, and energy applications.
- What sizes are available?
- Nai-Lok supplies instrumentation tubing from 1/8" OD to 6" OD, with both imperial and metric sizes available.
- Can you provide tubing in special alloys?
- Yes. We manufacture tubing in 904L, Duplex 2205, Super Duplex 2507, Monel 400, Alloy 625, Alloy 825, and Hastelloy C276.
- Do you provide mill test certificates?
- Yes. EN10204 3.1 Material Test Certificates (MTC) can be supplied upon request, CO, factory test report.
- What products does Nai-Lok manufacture besides tubing?
- Nai-Lok manufactures: Instrumentation Tube Fittings,Needle Valves,Ball Valves,Check Valves, Relief Valves,Manifold Valves,Pressure Regulators,High Purity Valves,Seamless Tubing Gas Panels,Sampling Cylinders.
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