Steel Gas Tube Cold Roll Forming Machine


Steel gas tube cold roll forming machines are used to produce steel tubes and pipes for gas transmission from steel coil strips. This equipment forms steel strips into round, square or rectangular hollow sections by progressively bending and welding through a series of rollers.

Key features of steel gas tube cold roll forming machines:

Forming MethodCold roll forming
MaterialsLow carbon steel, stainless steel
Tube TypesRound, square, rectangular, other custom shapes
Tube Sizes12 – 200 mm diameter (round)<br>20 – 250 mm (square and rectangular)
Wall Thickness0.5 – 3 mm
Tube Length6-12 m
Speed10 – 40 m/min
DrivesServo motor, hydraulic
AutomationPLC control system

Applications of Steel Gas Tube Cold Roll Forming Machine

Steel gas tubes from cold roll forming find application in:

Natural Gas TransmissionFor long distance overground gas pipelines
LPG Gas TransmissionTransmission lines for liquefied petroleum gas
CNG Gas TransmissionPiping networks for compressed natural gas
Industrial Gas PipelinesTo transport other gases like oxygen, nitrogen, hydrogen etc.
Structural and Mechanical SystemsAs mechanical components, structures
steel gas tube cold roll forming machine
Steel Gas Tube Cold Roll Forming Machine 3

Types of Steel Gas Tube Cold Roll Forming Machines

There are three main types of cold roll forming machines for steel gas tubes:

Machine TypeDescription
Round TubeProduces round hollow tube sections
Square and Rectangular TubeForms square and rectangular tube profiles
Custom and Special ShapesFor non-standard tube cross-sections

Round Tube Cold Roll Forming Machine

  • Uses a coil strip which is gradually rolled and welded into a round tube
  • Diameter size range of 12 – 200 mm
  • Output speed up to 40 m/min
  • Used for gas pipelines, automotive parts, structural sections

Square and Rectangular Tube Cold Roll Forming Machine

  • Forms steel strips into square and rectangular tubing
  • Size range of 20 – 250 mm
  • Used for specialized mechanical structures and gas piping

Custom Shape Cold Roll Forming Machine

  • Produces non-standard tube cross-sections
  • Shapes like oval, triangular, trapezoidal etc. sections
  • Used where special tube profiles are required

Specifications of Steel Gas Tube Cold Roll Forming Machine

The following table outlines typical technical specifications of steel gas tube cold roll forming machines:

Tube SizesRound: 12 – 200 mm diameter <br> Square: 20 – 250 mm <br> Rectangular: 50 x 30 mm to 250 x 150 mm
Wall Thickness0.5 – 3 mm
Strip WidthUp to 1250 mm
Tube Length6 – 12 m (up to 18 m optional)
Forming Speed10 – 40 m/min
Machine Power5.5 – 30 kW
Voltage380V, 3-phase, 50 Hz
Machine Weight8000 – 32000 kg
Machine Size10 – 25 m long x 2 – 3 m wide x 2 – 2.5 m high

Steel Gas Tube Cold Roll Forming Machine Design

The main design aspects and components of steel gas tube cold roll forming machines are:

  • Uncoiler – Feeds strip coil into machine
  • Straightening rollers – Correct coil curvature
  • Forming stations – Progressive bending rollers in 5-16 stations
  • Welding assembly – High frequency contact welding
  • Tube cutting unit – Cuts formed tube into lengths
  • PLC control – Automated forming parameters and speed
  • Conveyor system – Transfers formed tubes outside

Other features:

  • Heavy duty structural frame and gearbox transmission
  • Roller materials – alloy steel, wear-resistant
  • Safety covers, light curtains, sensors
  • Options for degreasing, cleaning, testing

Standard codes and standards like ASME B31.8, API 5L, ASTM A500 must be followed for gas tube design.

Working Principle of Steel Gas Tube Cold Roll Forming

The working stages in steel gas tube cold roll forming machine:

1. Feeding – Coil strip enters machine through powered uncoiler

2. Straightening – Rollers correct strip curvature

3. Pre-bending – Initial bend profile imparted

4. Progressive forming – Strip passes through bending stages

5. Welding – Edges welded by contact pads

6. Cutting – Formed tube cut to length by saws

7. Discharge – Conveyor transfers tube outside

8. Degreasing and testing – Cleaning and inspection

Installation of Steel Gas Tube Cold Roll Forming Machine

  • Install on flat leveled concrete floor
  • Anchor forming machine to ground
  • Allow working space around for coil loading, tube offloading
  • Install electric supply lines and control panel
  • Connect hydraulic, pneumatic lines if used
  • Integrate safety barriers, controls
  • Test run empty to confirm alignments

Operation and Maintenance of Steel Gas Tube Cold Roll Forming Machine


  • Ensure adequate strip lubrication
  • Set forming parameters on control panel
  • Monitor tube dimensions during production
  • Inspect welding seam quality
  • Allow cooling time between production cycles


  • Lubricate roller bearings and sliding parts
  • Check roller and gear wear periodically
  • Inspect electrical contacts and welder pads
  • Verify hydraulic system performance
  • Replace damaged forming rollers
  • Keep machine area clean to avoid debris

Choosing a Steel Gas Tube Cold Roll Forming Machine Supplier

Consider the following when selecting a steel gas tube cold roll forming machine supplier:

TechnologyLook for latest designs, high-end components
ExperienceNumber of years supplying such machines
Production RangeDiverse roll forming capabilities
CustomizationAbility to customize for specialized needs
QualityISO certified manufacturing, quality control
ServicesInstallation support, operator training, after-sales service
PricingCompetitive pricing for machine supply, spares, service
Lead TimesAbility to deliver equipment on scheduled time

Cost of Steel Gas Tube Cold Roll Forming Machines

The price of steel gas tube cold roll forming machines depends on:

  • Type of machine (round, square, custom tube)
  • Production speed and automation level
  • Size range of tubes to be produced
  • Additional pre/post-processing like degreasing, testing
  • Shipping and installation charges

Typical price range:

Machine TypePrice Range
Small Round Tube$50,000 – $150,000
Medium Round and Square Tube$150,000 – $350,000
Large Round and Square Tube$350,000 – $600,000
Custom Tube$200,000 – $800,000
steel gas tube cold roll forming machine
Steel Gas Tube Cold Roll Forming Machine 4

Pros and Cons of Steel Gas Tube Cold Roll Forming


  • High production speeds and output
  • Consistent quality and dimensional accuracy
  • Low material waste
  • Automated process requiring less labor
  • Ability to form complex and custom shapes
  • Lower costs than alternatives like extrusion
  • Safer than hot forming processes


  • Higher initial machine investment
  • Limited to certain tube sizes and wall thicknesses
  • Relatively inflexible once set up
  • Welding quality important to performance
  • Significant floor space required for equipment


What materials can be roll formed into gas tubes?

Steel is the most common material for gas tube cold roll forming. Low carbon steel, stainless steel, galvanized steel strips are generally used.

What shapes can be produced by steel tube cold roll forming?

Round, square, rectangular and custom non-standard hollow sections can be produced. Oval, trapezoid, triangular shapes are also possible.

What are the advantages of cold roll forming vs hot rolling for gas tubes?

Cold roll forming has benefits like closer size tolerance, better surface, no scale, safer process compared to hot rolling. But hot rolling allows larger sizes and wall thicknesses.

How to maintain quality of gas tube welding in cold roll forming?

Correct weld pad pressure, alignment and electrical conductivity parameters must be maintained. Roller wear, strip cleanliness also affect weld quality.

What safety aspects need consideration for gas tube roll forming machines?

Safety guards for moving parts, emergency stops, strip and tube sensors should be installed. Proper machine grounding, isolation from electrical hazards is required.

How to calculate power requirement for a gas tube cold roll forming machine?

Power depends on strip width, thickness, yield strength, tube size, production speed and number of forming stations. Typically 0.5-2 kW per roller is installed.


Steel gas tube cold roll forming machines offer an efficient automated process to produce round, square and custom hollow section tubes for gas transmission pipelines and structural applications. With high production speeds, precision tolerances and good surface finish, these machines provide quality tubes at relatively low costs. By selecting a capable supplier and ensuring proper machine installation, operation and maintenance, manufacturers can benefit from roll formed steel gas tubes.

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