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Introduction
BSI
BS 3605-1 specifies seamless austenitic stainless steel pipes and tubes
intended for pressure purposes where excellent corrosion resistance,
high-temperature strength, and dependable mechanical properties are required.
These seamless stainless steel pipes and tubes are manufactured to stringent
quality standards, offering superior resistance to oxidation, scaling, and
corrosive media while maintaining excellent weldability and formability.
BS
3605-1 austenitic stainless steel pipes and tubes are widely used in power
generation plants, oil & gas industries, petrochemical facilities,
refineries, chemical processing plants, heat exchangers, boilers, condensers,
pressure vessels, food processing, pharmaceutical industries, and industrial
engineering applications. Their excellent corrosion resistance and long service
life make them ideal for critical pressure systems operating under demanding
conditions.
The
specification ensures controlled chemical composition, superior mechanical
properties, dimensional accuracy, and high manufacturing quality for pressure
piping applications.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of BSI BS 3605-1
Austenitic Stainless Steel Pipes & Tubes, supplying premium-quality
seamless stainless steel piping solutions for power generation, petrochemical,
refinery, and industrial engineering projects worldwide.
Applicable Standard
Standard
Specification: BSI BS 3605-1
Organization:
British Standards Institution (BSI)
Title:
Austenitic Stainless Steel Pipes and Tubes for Pressure Purposes – Part 1:
Specification for Seamless Tubes
This
specification covers seamless austenitic stainless steel pipes and tubes
intended for pressure applications requiring excellent corrosion resistance,
high-temperature performance, and long-term reliability.
Forms of Supply
BSI
BS 3605-1 products are supplied in the following forms:
•
Seamless Pipes
• Seamless Tubes
• Heat Exchanger Tubes
• Boiler Tubes
• Condenser Tubes
• Instrumentation Tubes
• Pressure Tubes
• U-Bend Tubes
• Custom Cut Lengths
• Fabrication-Ready Materials
Grades Covered Under BSI BS 3605-1
•
Austenitic Stainless Steel Grades as specified in BS 3605-1
Supply Condition
•
Hot Finished
• Cold Finished
• Solution Annealed
• Annealed Condition
• Pickled and Passivated
• Fabrication-Ready Condition
Surface Finish
•
Mill Finish
• Pickled Finish
• Bright Annealed Finish
• Polished Finish
• Passivated Finish
• Plain End Finish
Standard Sizes
Pipes & Tubes
Outside
Diameter: 6 mm to 610 mm
Wall
Thickness: 0.5 mm to 50 mm
Length:
Up to 12 meters
Custom
diameters, wall thicknesses, lengths, and end preparations are available
according to customer requirements.
Chemical Composition of BSI BS 3605-1
|
Grade |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
Others |
|
304S14 |
0.03 Max |
0.20–1.00 |
0.05–2.00 |
0.040 Max |
0.030 Max |
10.0–13.0 |
17.0–19.0 |
— |
— |
|
304S18 |
0.06 Max |
0.20–1.00 |
0.05–2.00 |
0.040 Max |
0.030 Max |
9.0–12.0 |
17.0–19.0 |
— |
— |
|
316S14 |
0.03 Max |
0.20–1.00 |
0.05–2.00 |
0.040 Max |
0.030 Max |
12.0–15.0 |
16.0–18.5 |
2.0–3.0 |
— |
|
316S18 |
0.07 Max |
0.20–1.00 |
0.05–2.00 |
0.040 Max |
0.030 Max |
11.0–14.0 |
16.0–18.5 |
2.0–3.0 |
— |
|
321S18 |
0.08 Max |
0.20–1.00 |
0.05–2.00 |
0.040 Max |
0.030 Max |
10.0–13.0 |
17.0–19.0 |
— |
Ti: 5 × C–0.60 |
|
347S18 |
0.08 Max |
0.20–1.00 |
0.05–2.00 |
0.040 Max |
0.030 Max |
10.0–13.0 |
17.0–19.0 |
— |
Nb: 10 × C–20 × C or 1.00 |
Mechanical Properties
|
Grade |
Minimum Yield Strength (MPa or N/mm²) |
Tensile Strength (MPa or N/mm²) |
|
304S14 |
205 |
490–690 |
|
304S18 |
235 |
490–690 |
|
316S14 |
215 |
490–690 |
|
316S18 |
245 |
510–710 |
|
321S18 |
235 |
510–710 |
|
347S18 |
245 |
510–710 |
Mechanical property
requirements vary according to the selected grade and manufacturing condition.
Key Features of BSI BS 3605-1 Pipes &
Tubes
•
Excellent corrosion resistance
• Superior high-temperature strength
• Excellent oxidation resistance
• Outstanding weldability
• Good formability
• High dimensional accuracy
• Excellent pressure resistance
• Long service life
• Good toughness at elevated temperatures
• Suitable for corrosive process environments
Applications of BSI BS 3605-1 Pipes &
Tubes
Power Generation Industry
•
Boiler Tubes
• Superheater Tubes
• Steam Piping
• Heat Recovery Systems
Oil & Gas Industry
•
Process Piping
• Refineries
• Gas Processing Plants
• Pressure Systems
Petrochemical Industry
•
Heat Exchangers
• Chemical Processing Equipment
• Condensers
• Process Plants
Chemical Processing Industry
•
Chemical Transfer Lines
• Pressure Vessels
• Reactor Systems
• Industrial Process Equipment
Food & Pharmaceutical Industry
•
Hygienic Process Piping
• Food Processing Equipment
• Pharmaceutical Plants
• Sterile Fluid Systems
Industrial Engineering
•
Pressure Equipment
• Industrial Boilers
• Process Pipelines
• Engineering Applications
Fabrication and Welding
BSI
BS 3605-1 austenitic stainless steel pipes and tubes offer excellent
fabrication and welding characteristics.
•
Suitable for conventional welding processes
• Excellent tube bending properties
• Good machinability
• Reliable welded joint performance
• Excellent dimensional stability
• Suitable for fabrication into pressure systems
Proper
welding procedures should be followed to maintain corrosion resistance and
mechanical properties.
Heat Treatment
BSI
BS 3605-1 products are generally supplied in the solution annealed condition.
•
Solution annealing restores corrosion resistance
• Annealing improves ductility and formability
• Controlled heat treatment ensures uniform mechanical properties
• Stress relieving minimizes fabrication stresses where required
• Proper heat treatment improves long-term service performance
Advantages of BSI BS 3605-1 Pipes & Tubes
•
Excellent corrosion resistance
• High-temperature performance
• Superior mechanical strength
• Excellent weldability
• Outstanding oxidation resistance
• Long operational life
• Low maintenance requirements
• Excellent dimensional stability
• Easy fabrication
• Cost-effective solution for pressure applications
Conclusion
BSI
BS 3605-1 Austenitic Stainless Steel Pipes & Tubes are engineered for
pressure applications requiring superior corrosion resistance, excellent
high-temperature strength, and reliable long-term performance. These seamless
stainless steel pipes and tubes are extensively used in power generation, oil
& gas, petrochemical, chemical processing, food processing, pharmaceutical,
and industrial engineering applications where safety and durability are
essential.
Ladhani Metal Corporation supplies BSI
BS 3605-1 Austenitic Stainless Steel Pipes & Tubes in various sizes, wall
thicknesses, surface finishes, and customized dimensions, delivering reliable
piping solutions for pressure systems, heat exchangers, refineries, and
industrial engineering projects worldwide.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
BS36051
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