Capillary Tube

Premium Capillary Tube for Hydraulic Control and Chemical Injection Applications

We supply high-quality capillary tubes manufactured to meet the demanding requirements of the oil & gas industry. Available in austenitic stainless steel, duplex stainless steel, nickel-based alloys, and Monel alloys, our capillary tubes are designed to provide exceptional corrosion resistance, pressure integrity, and long-term reliability in harsh operating environments.

Suitable for hydraulic control lines, chemical injection systems, subsea installations, and downhole applications, our capillary tubing products are available in both welded and seamless constructions. Additional alloy grades, dimensions, and specifications can be customized according to project requirements.

Engineered for high-pressure and corrosive service conditions, our capillary tubes deliver consisten performance, extended service life, and reduced maintenance costs for critical oilfield operations.

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Reliable Capillary Tubing Solutions for Oil & Gas Operations

Our capillary tubes are specifically designed for hydraulic control line and chemical injection line applications where reliability, corrosion resistance, and pressure performance are critical.

Available Material Grades

Austenitic Stainless Steel

Excellent corrosion resistance
Superior forming and welding characteristics
Suitable for a wide range of oil & gas applications

Duplex Stainless Steel

Enhanced resistance to pitting and stress corrosion cracking
High mechanical strength
Excellent wear and corrosion fatigue resistance

Nickel-Based & Monel Alloys

Exceptional resistance to aggressive corrosive environments
Suitable for high-temperature and high-pressure applications
Ideal for subsea and challenging offshore conditions

Key Features

Available in welded and seamless construction
Excellent corrosion resistance
High pressure capability
Long service life
Suitable for offshore and onshore operations
Custom sizes and material grades available

Applications

Hydraulic Control Lines
Chemical Injection Lines
Subsea Production Systems
Offshore Platforms
Downhole Instrumentation
Oil & Gas Processing Facilities

Technical Specifications

Item	Specification
Product Category	Capillary Tube
Applications	Hydraulic Control Line, Chemical Injection Line
Tube Type	Seamless & Welded
Material Options	Austenitic Stainless Steel, Duplex Stainless Steel, Nickel Alloy, Monel Alloy
Corrosion Resistance	Excellent
Pressure Rating	Suitable for High-Pressure Applications
Temperature Resistance	Suitable for High-Temperature Service
Manufacturing Standard	International Industry Standards
Customization	Available Upon Request
Origin	China

Available Material Grades

Material Grade
ST316L-40
ST2205-80
ST2205-90
ST2507-90
ST825-40
ST625-40
STMonel400-40

Mechanical Properties

Property	Range
Yield Strength (min)	40,000 – 90,000 psig
Tensile Strength (min)	70,000 – 116,000 psig
Hardness	Up to 32 HRC (depending on material grade)

Key Advantages

• Manufactured from premium corrosion-resistant alloys

• Available in both seamless and welded tubing configurations

• Excellent resistance to corrosion, pitting, and stress corrosion cracking

• Suitable for high-pressure and high-temperature applications

• Reliable performance in offshore, subsea, and downhole environments

• Custom material grades and dimensions available

• Long service life with reduced maintenance requirements

• Ideal for critical hydraulic control and chemical injection systems

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