Seamless Tubing
316 Stainless Steel Seamless Tubing
316 stainless steel seamless tubing for instrumentation, process control and industrial fluid systems. Available in fractional and metric outside diameters with multiple wall thicknesses for different pressure and flow requirements.
Specifications
- Product Type
- Seamless Instrumentation Tubing
- Material
- 316 Stainless Steel
- Construction
- Seamless
- Standard Basis
- ASTM A269
- Condition
- Fully Annealed
- Size System
- Fractional & Metric
- Fractional OD Range
- 1/16 to 2 in.
- Metric OD Range
- 3 to 38 mm
- Wall Thickness
- Multiple options depending on tube OD
- Pressure Rating
- Depends on OD, wall thickness and service conditions
316 Stainless Steel Seamless Tubing
316 stainless steel seamless tubing is used to carry liquids and gases between tube fittings, valves, manifolds, instruments and process equipment.
Available in fractional and metric sizes, the tubing can be selected by outside diameter and wall thickness to suit instrumentation, process control and industrial fluid system requirements.
Key Features
- Seamless 316 stainless steel construction
- Fully annealed condition
- ASTM A269 standard basis
- Fractional and metric outside diameters
- Multiple wall thicknesses for different pressure requirements
- Suitable for instrumentation tube fitting systems
- Available for individual requirements, BOMs and project supply
Engineering Specifications
Parameter | Specification |
|---|---|
Material | 316 Stainless Steel |
Construction | Seamless |
Standard Basis | ASTM A269 |
Condition | Fully Annealed |
Fractional OD Range | 1/16 to 2 in. |
Metric OD Range | 3 to 38 mm |
Size System | Fractional & Metric |
Wall Thickness | Size-dependent |
Working Pressure | OD-, wall-thickness- and service-dependent |
Fractional Tubing — Representative Working Pressures
Tube OD | Wall Thickness | Reference Working Pressure |
|---|---|---|
1/8 in. | 0.028 in. | 8,500 psig |
1/8 in. | 0.035 in. | 10,900 psig |
1/4 in. | 0.035 in. | 5,100 psig |
1/4 in. | 0.049 in. | 7,500 psig |
1/4 in. | 0.065 in. | 10,200 psig |
3/8 in. | 0.035 in. | 3,300 psig |
3/8 in. | 0.049 in. | 4,800 psig |
3/8 in. | 0.065 in. | 6,500 psig |
1/2 in. | 0.035 in. | 2,600 psig |
1/2 in. | 0.049 in. | 3,700 psig |
1/2 in. | 0.065 in. | 5,100 psig |
1 in. | 0.065 in. | 2,400 psig |
1 in. | 0.083 in. | 3,100 psig |
1 in. | 0.120 in. | 4,700 psig |
Metric Tubing — Representative Working Pressures
Tube OD | Wall Thickness | Reference Working Pressure |
|---|---|---|
3 mm | 0.71 mm | 10,800 psig |
3 mm | 0.89 mm | 13,800 psig |
6 mm | 1.00 mm | 7,400 psig |
6 mm | 1.50 mm | 11,500 psig |
8 mm | 1.00 mm | 5,800 psig |
10 mm | 1.00 mm | 4,200 psig |
12 mm | 1.00 mm | 3,400 psig |
12 mm | 2.00 mm | 6,600 psig |
16 mm | 1.50 mm | 3,900 psig |
20 mm | 2.00 mm | 4,200 psig |
25 mm | 2.50 mm | 4,200 psig |
38 mm | 3.50 mm | 3,400 psig |
Pressure & Service Considerations
Working pressure depends on tube outside diameter, wall thickness, material, temperature and service conditions. The values above are reference working pressures for selected tubing sizes and should not be interpreted as the pressure rating of the complete assembled system.
For elevated-temperature service, allowable working pressure may require derating. Gas service also requires additional consideration when selecting tube wall thickness.
The allowable pressure of a complete fluid system should be determined by its lowest-rated component and the applicable system design requirements.
Tubing for Instrumentation Fittings
Correct tubing selection is important for reliable compression tube fitting performance.
Tube outside diameter, wall thickness, material condition, dimensional tolerance and surface condition should be compatible with the fitting and operating requirements. Fully annealed stainless steel tubing provides the material condition commonly required for proper ferrule interaction during tube fitting installation.
Tubing should be free from significant surface defects that could interfere with fitting sealing or gripping performance.
Typical Applications
- Pressure and flow measurement systems
- Analyzer and sampling systems
- Valve and manifold connections
- Chemical and process systems
- Hydraulic and utility systems
- Test equipment and laboratory systems
- Industrial fluid and gas handling
Selection & Ordering Information
To specify the required seamless tubing, provide:
- Tube OD — fractional or metric
- Wall thickness
- Material requirement — 316 stainless steel
- Required quantity and length
- Operating pressure and temperature, when relevant
- Liquid or gas service, when relevant
- Applicable specification or project requirements
- Required material documentation, when specified
For BOMs, project requirements or replacement supply, existing tube specifications and supporting documents can also be submitted for review.
