Carbon Steel Tube Supplier from China

15+ years of carbon steel tube manufacturing.
Custom sizes, grades, and tolerances.
Stable quality with strict dimensional and NDT tests.
Reliable raw materials from certified Chinese mills.
Fast production and delivery for bulk orders.

One Stop Solution to Custom Carbon Steel Tube

Vulroc is a dedicated carbon steel tube manufacturer in China, delivering integrated services from raw material procurement to precision tube fabrication and export-ready packaging. We support full customization—including OD/ID ranges, wall thickness, mechanical properties, tolerances, and surface finishing—to meet complex engineering needs. With stable partnerships with mill-certified steel suppliers and over 1,200 tons of standing inventory, we help clients avoid delays caused by material shortages. Our production line maintains a controlled daily capacity of 40–60 tons, while in-house QC performs dimensional checks, hydrostatic tests, and NDT to ensure batch-to-batch consistency.

Backed by more than fifteen years of tube manufacturing experience, Vulroc delivers an annual output of approximately 5,000 tons of carbon steel tubes to customers in China, Southeast Asia, Europe, and the Middle East. Our tubes are widely used in boilers, structural frameworks, mechanical equipment, oil & gas pipelines, construction machinery, and automotive components. From standard industrial supply to project-specific engineering solutions, we support clients with reliable capacity, predictable lead times, and long-term technical service.

Explore our Regular Carbon Steel Tube Styles

Vulroc offers a complete selection of regular carbon steel tube styles, including Seamless Carbon Steel Tubes, Welded Carbon Steel Tubes, Precision Cold-Drawn Tubes, and Galvanized Carbon Steel Tubes to support both standard and project-specific applications. We work with high-quality carbon steel and alloy steel grades such as ASTM A179,A210 A1,A334 Gr.1,Gr.6,A213 T5,T11,T22,T91 etc and materials to with DIN,EN,BS,JIS spec to meet structural, mechanical, and fluid-handling requirements. To enhance performance and durability, Vulroc provides multiple surface treatments and processing options, including hot-dip galvanizing, electro-galvanizing, oiling, phosphating, sandblasting, cutting, threading, beveling, and end-forming services.

Vulroc Carbon Steel Tube Features

We can produce according to customers’ requirements to ensure 100% customer satisfaction.

Wide Range of Custom Specifications

Our customizable OD, wall thickness, length, tolerances, and mechanical properties meet structural, hydraulic, and high-pressure requirements.

Multiple Carbon Steel Grades

We are available in Q195, Q235, Q345, 20#, 45#, ST37/ST52, ASTM A53/A106, API 5L, and other international grades for construction, machinery, and pipelines.

Advanced Tube Manufacturing Processes

We offer seamless, ERW, and precision honed tubes with smooth interiors and accurate dimensions.

Strict Quality Control

Our each batch is tested for chemistry, mechanics, dimensions, pressure, and NDT compliance.

Surface Treatment & Additional Processing

Our finishing and machining options are available to meet specific project requirements.

Stable Supply & Fast Lead Times

Our inventory and automated production support reliable 7-10 day delivery.

Carbon Steel Tube Custimization Specification

At Vulroc, we customize carbon steel tubes to match your exact operating conditions and material needs. From high-pressure use to marine corrosion environments and special alloy options, we deliver precise, performance-focused carbon steel tube solutions.

Choose the Customized Carbon Steel Tube Sizes

We produce your carbon steel tube in the exact size you need within the following ranges:

Size Parameter	Available Range
Outer Diameter (OD)	6 mm to 610 mm (covers small-diameter precision tubes to large-diameter structural tubes)
Inner Diameter (ID)	3 mm to 600 mm (depending on wall thickness and manufacturing method)
Wall Thickness (WT)	0.5 mm to 50 mm (suitable for precision, mechanical, fluid, and high-pressure applications)
Length	1 m to 12.5 m (supports fixed lengths, multiples, and extended tubes)
Straightness	1.5 mm/m (cold drawn); ≤3 mm/m (hot rolled)
Special Size Requests	Supports unconventional sizes, thick-walled tubes, and thin-walled tubes customization

Choose the Customized Carbon Steel Tube Shape

Vulroc offers a diverse range of customizable carbon steel tube shapes to meet structural, mechanical, and industrial project requirements.

Our options include:

Round Tube
Square Tube
Rectangular Tube
Flat Oval Tube
Elliptical Tube
Hexagonal Tube
Coil Tube Form
Other engineered profiles based on customer drawings

All shapes can be manufactured according to ASTM, EN, JIS, or project-specific standards, depending on material and application needs. Vulroc provides specialty-shaped carbon steel tubes in cut-to-length, coiled, or extended straight forms, ensuring seamless integration into your equipment and installation requirements

Choose the Customized Carbon Steel Tube Material

Vulroc provides multiple carbon steel grades to meet diverse engineering, structural, and industrial requirements, ensuring durability and performance across applications such as construction, machinery, energy, and pipelines.

We offer various options of custom carbon steel tube materials, including:

Carbon Steel Tubes (Q195, Q215, Q235, Q345, ASTM A179, ASTM A213)
Alloy Steel Tubes (20#, 35#, 45#, 16Mn, 40Cr, 42CrMo)
High-Strength Steel Tubes (ASTM A500, ASTM A519)
Other engineered carbon or low-alloy steels based on customer specifications

All materials can be manufactured according to ASTM, EN, JIS, or project-specific standards to ensure mechanical strength, dimensional accuracy, and long-term reliability for demanding applications.

Choose the Customized Carbon Steel Tube Finishing

Vulroc provides a variety of surface finishing options for carbon steel and alloy steel tubes, designed to enhance durability, corrosion resistance, and suitability for different industrial applications. Available finishing options include:

Polished Surface: Used for decorative applications, structural tubes, and general industrial parts.
Pickled & Oiled: Commonly applied to boiler tubes, heat exchangers, and general piping.
Galvanized Coating: Protects outdoor pipelines, construction materials, and corrosion-prone environments.
Black Oxide / Blackened: Used in automotive, machinery, and industrial tubing for added surface durability.
Annealed / Softened: Ideal for forming, bending, and mechanical assembly processes.
Epoxy or Powder Coating: Provides a protective layer for chemical, marine, and outdoor applications.
Threaded or Flared Ends: Prepared for pipe fittings, HVAC, and fluid transport systems.
Custom Surface Finish: Tailored solutions based on specific application requirements.

Choose the Customized Carbon Steel Tube End Type

Vulroc offers a variety of end type options to ensure seamless integration with industrial equipment, pipelines, boilers, heat exchangers, and mechanical assemblies.

Available end types for carbon steel tubes include:

Plain End (PE) – suitable for general cutting, assembly, and installation
Beveled End (BE) – ideal for welding and strong joint preparation
Threaded End – enables mechanical connections and fitting compatibility
Flared End – commonly used in fluid systems and HVAC applications
Swaged or Reduced End – for tube-to-tube connections or coil assemblies
Capped End – protects tubes from dust, moisture, and transport damage
Custom End Processing – tailored to project-specific drawings and requirements

All end types can be configured according to outer diameter, wall thickness, and material selection to ensure proper fit, reliable sealing, and long-term durability in demanding environments.

Tolerance Parameter	Standard Range / Tolerance	Notes
Outer Diameter (OD) Tolerance	±0.2 mm to ±1.0 mm	Depends on manufacturing method (hot rolled, cold drawn, welded)
Inner Diameter (ID) Tolerance	±0.2 mm to ±1.0 mm	Based on OD and wall thickness
Wall Thickness (WT) Tolerance	±5% to ±10%	Varies with tube size and processing method
Length Tolerance	±5 mm to ±20 mm	Can be customized for cut-to-length orders
Straightness	≤1.5 mm/m (cold drawn)；≤3 mm/m (hot rolled)	Ensures proper installation and assembly
End Squareness	≤0.5 mm to ≤2 mm	Depends on end type and tube diameter
Roundness / Ovality	≤0.5% to ≤1%	Critical for high-pressure or precision applications
Surface Roughness (Ra)	0.4–1.6 μm	Optional polishing or finishing improves corrosion resistance
Bending Radius Accuracy	±2% to ±5%	For pre-bent or U-bent tubes
Thread Tolerance	Standard ISO/ANSI class	Only applies to threaded ends
Custom Tolerance Requests	Available upon request	Supports specific engineering or OEM requirements

All-in-one Solution to Custom Carbon Steel Tube

Low MOQ

Ideal for projects of all sizes, our flexible minimum order quantities let you start small without compromising specifications.

Fast Sampling

Get accurate pre-production samples quickly to verify dimensions, wall thickness, and performance before full-scale manufacturing.

Endless Specifications

Customize outer diameter, wall thickness, length, and surface finish to meet the exact requirements of construction, industrial, and engineering applications.

High Performance

We use premium carbon steel for exceptional strength, wear resistance, and long-term durability in demanding environments.

Reliable Tubing Solutions for Machinery Manufacturing

Machinery manufacturing and equipment assembly require materials that deliver consistent strength, dimensional accuracy, and long-term reliability. Our carbon steel tubes are engineered to meet these requirements, providing stable structural support and dependable performance for a wide range of mechanical and industrial equipment.

Available in various diameters, wall thicknesses, and surface finishes, including black, galvanized, and coated options, these tubes offer excellent weldability and machinability. They are widely used in equipment frames, structural supports, fluid transfer lines, and custom OEM components, ensuring durable, efficient, and long-lasting solutions for machinery manufacturing and equipment integration.

Reliable Tubing Solutions for Energy & Power Applications

Energy and power systems require materials capable of operating safely and reliably under high pressure, elevated temperatures, and continuous load conditions. Our carbon steel tubes are engineered to meet these demands, offering excellent mechanical strength, structural stability, and long-term performance for critical energy applications.

Available in a wide range of diameters, wall thicknesses, and surface finishes, including black, galvanized, and epoxy-coated options, these tubes provide effective resistance to corrosion and mechanical wear. They are widely used in heat exchangers, boilers, condensers, pipelines, offshore platforms, and power generation facilities, delivering durable, high-performance solutions for both conventional and renewable energy projects.

Customized Tubes for OEM and Manufacturing

OEM and manufacturing applications require materials that provide precision, reliability, and adaptability. Our carbon steel tubes are engineered to deliver consistent strength, durability, and stable performance for diverse industrial needs.

Available in custom diameters, wall thicknesses, and finishes such as polished, black oxide, or epoxy coating, they integrate seamlessly into manufacturing processes. Ideal for automotive components, machinery parts, structural reinforcement, and fluid transport systems, our carbon steel tubes provide long-lasting, dependable solutions for OEMs and industrial manufacturers.