Seamless U-Tubes - Steamline Industries Ltd

Stainless Steel Seamless U-Tubes

Cold-drawn seamless U-tubes manufactured to exact bend radii and tight dimensional tolerances for shell-and-tube heat exchangers and pressure vessel applications.

What Are Stainless Steel Seamless U-Tubes?

Stainless steel seamless U-tubes are cold-drawn tubes that are precision bent into a U-shape for use in shell-and-tube heat exchangers. Their seamless construction eliminates weld-zone weaknesses, while controlled bending ensures uniform wall thickness, dimensional accuracy, and long-term reliability.

At Steamline Industries, we manufacture seamless U-tubes to ASTM A213 / ASME SA213 standards with precise bend radii, tight tolerances, and superior surface finishes, serving heat exchanger manufacturers, pressure vessel fabricators, and EPC contractors worldwide.

Key Features & Advantages

Seamless Construction

Eliminates weld-zone weaknesses and ensures structural integrity.

Precision Bend Control

Maintains dimensional accuracy while minimizing wall thinning and ovality.

Tight Length Tolerances

Ensures compatibility with heat exchanger bundle requirements.

Superior Surface Finish

Provides enhanced cleanliness and corrosion resistance.

100% Tested Quality

Every tube undergoes rigorous inspection before dispatch.

Custom Bundle Configurations

Manufactured according to customer drawings and project specifications.

Specifications Table

Specification	Details
Standard	ASTM A213 / ASME SA213
Grades	TP304, TP304L, TP316, TP316L, TP321, TP347
OD Range	12.7 mm to 38.1 mm
Wall Thickness	1.2 mm to 3.0 mm (BWG as required)
Bend Radius	1.5D, 2D, custom radii as per drawing
Leg Length Tolerance	±3 mm (tighter tolerances on request
Surface Finish	Bright Annealed, Pickled & Passivated
End Finish	Plain end, deburred, trimmed square
Testing	Hydrostatic, Eddy Current, Dimensional inspection per bundle drawing

Why Choose Our Stainless Steel Seamless U-Tubes?

✓

Seamless Construction

No weld-zone weakness in high-stress bend areas.

✓

Controlled Bending Process

Minimizes wall thinning and ovality.

✓

Custom Bundle Drawings

Manufactured according to customer specifications.

✓

Heat Exchanger Compatibility

Suitable for fixed tube sheet and floating head designs.

✓

100% Tested Quality

Hydrostatic and Eddy Current testing before dispatch.

✓

Bundle Identification

Bundled and tagged for easy assembly and installation.

Industry Applications

Chemical & Petrochemical

Power Generation

Heat Exchanger OEMs

Refineries

HVAC Systems

Pressure Vessel Manufacturers

OUR PRODUCTS

Explore Our Product Range

Designed for industrial performance with tight tolerances, premium stainless steel grades and global compliance standards.

Heat Exchanger

High Precision & High Pressure Heat Exchanger Tubing

Built for thermal performance and demanding pressure applications.

Hyadrulic & Instrumentation

Hydraulic & Instrumentation Tubing

Precision tubing designed for pressure control and fluid systems.

Seamless Pipes

Stainless Steel Seamless Pipes

High-strength seamless pipes engineered for performance.

Welded Pipes

Stainless Steel Welded Pipes

Consistent quality with dependable industrial durability.

Welded Tubes

Stainless Steel Welded Tubes

Precision welded tubing with smooth finish and reliable performance.

Seamless Tubes

Stainless Steel Seamless Tube

Secure packaging designed for safe handling and worldwide delivery.

Duplex Pipes

Stainless Steel Duplex Pipes

Duplex Pipes Engineered for Superior Strength and Corrosion Resistance.

Welded U-tubes

Stainless Steel Welded U-Tubes

Precision Welded U-Tubes Engineered for Reliable Heat Transfer Performance.

Super Duplex Pipes

Stainless Steel Super Duplex Pipes

Super Duplex Pipes Engineered for Maximum Strength and Superior Corrosion Resistance.

Need Custom Stainless Steel Seamless U-Tubes?

Our engineers can manufacture U-tubes according to your bundle drawings and project specifications.

CERTIFICATES

Quality You Can Trust

Our certifications and inspection standards reflect our commitment to global manufacturing excellence.

Quality Management System

ISO 9001:2015

Quality Management System — governing our entire production, testing, and delivery process

Environmental Management System

ISO 14001:2015

Environmental Management System — ensuring sustainable and eco-responsible operations

Occupational Health And Safety Management System

ISO 45001 2018

Occupational Health & Safety Management System — protecting our workforce and communities

RESOURCES

Technical Resources & Downloads

Everything your procurement and engineering teams need in one place.

SIL Catalog

Explore the complete range of stainless steel pipes and tubes manufactured by Steamline Industries. The catalog covers seamless pipes, welded pipes, tubes, heat exchanger tubing, hydraulic and instrumentation tubing, U-tubes, duplex, and super duplex products.

Designed for engineers, procurement teams, and industrial buyers, it provides key technical specifications, available grades, dimensions, standards, and application insights across industries including oil & gas, petrochemicals, power generation, pharmaceuticals, and process engineering.

Submit your details to access the latest edition and find the right solutions for your project requirements.

GET IN TOUCH

Discuss your industrial needs.

Tell us about your project and our engineering team will help you identify the right equipment or custom solution.

Steamline Assistant

Get a quote