304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes

Low Carbon Grade • Clean Bore Finish • Reliable Pressure Performance

Manufacturers and suppliers of 304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes, engineered for precision fluid power, control lines, and sensitive instrumentation systems requiring excellent dimensional accuracy, high-pressure, and hygienic service environments.

ISO 9001:2015 • ISO 14001:2015 • ISO 45001:2018 • PED 2014/68/EU • EN 10204 3.1/3.2 Certified

304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes

Our 304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes are engineered for precision fluid power and control systems where superior corrosion resistance, dimensional accuracy, and long-term reliability are essential. Manufactured from low-carbon AISI 304L / UNS S30403 stainless steel, these tubes offer excellent resistance to oxidation, general corrosion, and intergranular attack, particularly in welded and high-hygiene service environments.

The seamless, high-precision construction ensures uniform wall thickness and a smooth internal bore, reducing pressure drop and improving system responsiveness in hydraulic circuits, pneumatic lines, and sensitive instrumentation applications. These tubes maintain structural integrity under varying pressures and temperature conditions, ensuring consistent, leak-free performance.

Widely used in oil & gas control systems, chemical and petrochemical plants, power generation facilities, pharmaceutical and food & beverage equipment, and industrial automation, our 304L stainless steel seamless tubes are manufactured and tested to meet international standards, delivering a durable, hygienic, and cost-effective solution for precision piping and fluid handling needs.

304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes

Comprehensive Reach

Our 304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes are trusted across major industrial cities in India, including Mumbai, Chennai, Pune, Ahmedabad, and Hyderabad, supporting chemical processing, automation, fluid handling, power generation, and large-scale infrastructure and EPC projects.

In the Middle East, we supply the UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Jordan, Iraq, and Lebanon, where our 304L stainless steel tubes are relied upon for oil & gas control systems, water treatment facilities, industrial piping networks, and precision instrumentation in demanding service environments.

Europe, Africa, Americas & Asia-Pacific

Across Europe—including Germany, Italy, France, Spain, the United Kingdom, Turkey, and Eastern European markets—our tubes are valued for their dimensional accuracy and corrosion resistance in manufacturing, pharmaceutical, food processing, and industrial automation systems. In Africa, the Americas, and the Asia-Pacific region, our products support marine, chemical processing, power generation, mining, and large-scale industrial projects operating in corrosive and high-pressure environments.

Commitment to Quality

Wherever you operate—Doha, Dubai, London, Moscow, or New York—Seminox Pipes & Tubes delivers premium-quality 304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes, manufactured and certified to international standards for traceability, durability, and long-term performance in precision piping and pressure service applications worldwide.

Key Features of 304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes

Low-Carbon 304L Grade for Welded Systems

AISI 304L / UNS S30403 stainless steel offers enhanced resistance to intergranular corrosion, making these tubes ideal for welded hydraulic and instrumentation systems in corrosive and hygienic service environments.

High-Precision Seamless Manufacturing

Cold drawn and hot finished seamless processes ensure uniform wall thickness, tight dimensional tolerances, and a clean, smooth internal bore for reliable performance in hydraulic, pneumatic, and precision control lines.

Excellent Corrosion & Oxidation Resistance

Provides strong resistance to general corrosion, oxidation, and scaling, enabling long-term service in chemical processing, pharmaceutical, food-grade, and industrial automation environments.

Clean Bore for Accurate Instrumentation

Smooth internal surfaces reduce contamination, pressure drop, and flow turbulence, ensuring precise signal transmission and consistent performance in sensitive measurement and control applications.

Reliable Strength for Pressure & Fluid Systems

Designed to withstand moderate to high operating pressures and thermal cycling, providing dependable performance in hydraulic circuits, pneumatic systems, and industrial fluid handling networks.

Wide Size Range & Custom Fabrication

Available in a broad range of diameters, wall thicknesses, and custom cut lengths, with optional polishing, bending, and special surface finishes to meet EPC, OEM, and project-specific requirements.

Product Specification – 304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes

Outside Diameter
6.00 mm to 114.30 mm (1/4” to 4.5”)
Wall Thickness
0.70 mm to 12.70 mm (0.028” to 0.500”)
Grade / Material
Low-Carbon Austenitic Stainless Steel
AISI 304L / UNS S30403
EN 1.4307 / X2CrNi18-9
Manufacturing Process
Seamless (Cold Drawn / Hot Finished) • Solution Annealed • Pickled / Bright Annealed
Standards & Specifications
ASTM A269 – General Service & Instrumentation Tubes
ASTM A213 – Seamless Boiler, Superheater & Heat Exchanger Tubes
ASTM A511 – Mechanical Tubing
EN 10216-5 – Seamless Stainless Steel Tubes
DIN EN 10305-1 (Precision Tubes, where applicable)
EN 10204 3.1 / 3.2 – Inspection & Test Certificates
Customer Drawings & EPC / Project Specifications
Length
Standard: 6 meters • Random Lengths • Up to 24 meters
Custom cut lengths, coiled tubing, and special export packaging available
Surface Finish
Annealed & Pickled (AP), Bright Annealed (BA),
Polished (180 / 240 / 320 / 400 Grit), Electropolished, Honed (on request)
Mechanical Properties (Typical)
Yield Strength: ≥ 170 MPa
Tensile Strength: 485–620 MPa
Elongation: ≥ 40%
Applications
Hydraulic & Pneumatic Lines, Instrumentation & Control Tubing,
Oil & Gas Control Systems, Chemical & Petrochemical Plants,
Pharmaceutical & Clean Service Lines, Food & Beverage Processing,
Power Generation Equipment, Automation Systems,
Precision Fluid Handling & High-Purity Applications

Manufacturing, Testing & Quality Assurance – 304L Stainless Steel Tubes

Advanced Manufacturing

304L Stainless Steel Seamless Hydraulic and Instrumentation Tubes are produced using precision cold drawing and hot finishing processes, followed by solution annealing and pickling or bright annealing. The low-carbon austenitic microstructure ensures excellent weldability, resistance to intergranular corrosion, smooth internal surfaces, and tight dimensional tolerances required for clean service, hydraulic, and precision control systems.

Inspection & Testing

Every tube undergoes comprehensive quality control procedures including Eddy Current Testing (ECT), Hydrostatic or Pneumatic Pressure Testing, Positive Material Identification (PMI), chemical composition analysis, mechanical property testing, dimensional verification, surface condition checks, and 100% visual inspection. These measures ensure reliable performance in high-pressure, hygienic, and precision instrumentation environments.

Certifications & Compliance

Manufactured in accordance with ASTM A269, ASTM A213, ASTM A511, and EN 10216-5 standards under ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 quality systems. Tubes are supplied with EN 10204 3.1 / 3.2 Inspection Certificates, ensuring full material traceability, regulatory compliance, and acceptance for EPC, OEM, pharmaceutical, food processing, and industrial automation projects worldwide.

Typical Applications of 304L Stainless Steel Seamless Hydraulic & Instrumentation Tubes

Hydraulic & Pneumatic Control Lines
Instrumentation & Process Measurement Tubing
Oil & Gas Control Panels & Utility Systems
Chemical & Petrochemical Processing Units
Pharmaceutical & Clean / Hygienic Service Lines
Food & Beverage Processing Equipment
Power Generation & Auxiliary Fluid Systems
Automation, Robotics & Industrial Machinery
High-Purity & Precision Fluid Handling Systems

Need 304L Stainless Steel Seamless Hydraulic Tubes & Instrumentation Tubes for Your Project?

Partner with Seminox Pipes & Tubes for certified, project-ready 304L Stainless Steel Seamless Hydraulic & Instrumentation Tubes manufactured to ASTM A269 / ASTM A213 / EN 10216-5 standards and supplied with EN 10204 3.1 / 3.2 Inspection Certificates. Trusted worldwide for chemical processing, oil & gas control systems, automation, pharmaceutical, food & beverage, and precision fluid handling applications requiring dimensional accuracy, corrosion resistance, and long-term operational reliability.

Get in Touch

Phone Number

022 6659 5296
+91 9987403801
+918433943801

Email

domestic@seminoxpipes.com
export@seminoxpipes.com

Address

1219 / 1220, 12th Floor, Prasad Chambers, Girgaon, Mumbai- 400004

Business Hours

Monday — Friday 9am – 5pm
Saturday — 10am – 3pm
Sunday — Closed

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