7.6 - 16 mm Roll Forming Line and Pipe Making Machine for Galvanized Steel Small

Product Specification

7.6 - 16MM Tube Forming Machine for heat exchanger tube, copper coated tubes

Tube forming machine specification

1. pipe O.D(round):7.6mm-16mm

2. Wall thickness:0.3-1.5mm

3. length:4-12m

4. Speed:120m/min

Product Overview

The 7.6 - 16 mm Roll Forming Line and Pipe Making Machine for galvanized steel is designed for manufacturers producing small-diameter welded tubes with stable size, clean surface, and continuous production efficiency.

This production line is suitable for galvanized steel tubes used in furniture, decoration, small structural parts, household products, equipment accessories, display racks, light frames, and precision industrial components.

Small-diameter galvanized tubes require higher forming accuracy than many general steel pipes. Because the tube diameter is small, even minor roller misalignment, strip edge deviation, or unstable welding can cause visible defects, poor roundness, weak weld seams, and surface scratches.

This machine provides a complete production process including uncoiling, strip feeding, forming, high-frequency welding, sizing, cutting, and finished tube discharge. It can be customized according to tube diameter, wall thickness, galvanized strip quality, speed requirement, and factory layout.

Zhangjiagang Zhongyue Metallurgy Equipment Technology Co., Ltd provides welded tube production line solutions for small-diameter galvanized steel pipe manufacturing, helping customers improve production stability, reduce waste, and meet practical application requirements.

Cause

Many factories search for a 7.6 - 16 mm galvanized steel pipe making machine because small tube production is difficult to control with general pipe mill equipment.

The main challenge is dimensional accuracy. When the tube diameter is only 7.6 mm to 16 mm, small changes in strip width, roller position, forming angle, or welding heat can create obvious quality problems.

Another common issue is surface protection. Galvanized steel has a zinc coating on the strip surface. If the roller design, forming pressure, or guiding system is not suitable, the zinc layer may be scratched or damaged during production.

Welding control is also critical. If the high-frequency welding power is too low, the weld seam may be weak. If the welding power is too high, the tube may overheat, the zinc layer near the weld area may be affected, and the surface appearance may become poor.

For customers producing small galvanized tubes for furniture, decoration, or light industrial use, unstable tube quality can directly affect assembly, appearance, coating performance, and customer acceptance.

Therefore, this type of machine should not be selected only by pipe diameter. The correct solution must consider strip material, wall thickness, zinc coating condition, welding method, sizing accuracy, cutting quality, and finished tube handling.

Solution

The 7.6 - 16 mm Roll Forming Line solves these problems through a small-diameter tube forming and welding process designed for galvanized steel strip.

The forming section uses precision rollers to gradually shape the flat galvanized strip into a small round tube. Proper roller design reduces surface friction and helps protect the galvanized coating during forming.

The high-frequency welding system heats the strip edges and joins them into a continuous welded tube. For galvanized steel, welding parameters must be controlled carefully to maintain weld strength while reducing unnecessary heat influence on the tube surface.

The sizing section corrects the tube diameter and improves roundness. This is especially important for small tubes because even a small tolerance deviation may affect assembly or appearance.

The cutting system cuts the tube into required lengths. According to product requirements, the line can use flying saw, cold saw, or other matched cutting solutions to improve cut-end quality and length consistency.

The run out table receives the finished tubes after cutting and supports smooth discharge, collection, inspection, and bundling.

For customers who need stable small tube production, this line offers a practical solution for improving consistency, reducing manual adjustment, and supporting long-term industrial production.

Specifications

The above specifications are reference information. Final configuration should be confirmed according to tube diameter, wall thickness, galvanized strip quality, production speed, cutting length, and final application.

Application

Furniture and Household Product Tubes

This machine is suitable for producing small galvanized tubes used in furniture frames, chair parts, table structures, shelf supports, and household product components.

For these applications, tube appearance and dimensional stability are important because the finished tubes are often visible after assembly.

Decorative and Display Rack Tubes

Small galvanized tubes are widely used in decorative frames, display racks, light stands, retail fixtures, and storage products.

The machine helps produce tubes with stable roundness and clean surface quality, which supports better product appearance.

Light Industrial Components

The 7.6 - 16 mm size range can be used for small industrial accessories, equipment supports, guards, brackets, and light mechanical parts.

For these components, accurate tube diameter and consistent cutting length help reduce downstream processing problems.

Greenhouse and Light Frame Applications

Small galvanized steel tubes can be used for light greenhouse frames, plant supports, garden structures, and small framework products.

Galvanized material is often selected because it provides better corrosion resistance than ordinary untreated carbon steel.

Precision Small Tube Manufacturing

For customers producing small tubes in repeated batches, a specialized small-diameter pipe making machine is more suitable than modifying a larger pipe mill.

A correctly designed line improves production stability and reduces waste caused by frequent adjustment.

How It Works

The process begins with galvanized steel coil loading. The uncoiler releases the steel strip and sends it into the feeding and guiding section.

The strip then enters the roll forming section. A series of precision forming rollers gradually bends the flat galvanized strip into a small open tube shape.

Because the tube diameter is only 7.6 mm to 16 mm, forming accuracy is critical. Roller alignment, strip centering, and stable feeding must be controlled carefully.

After forming, the strip edges enter the high-frequency welding section. The edges are heated and pressed together to form a continuous weld seam.

After welding, the tube passes through cooling and sizing sections. The sizing rollers correct the outer diameter, improve roundness, and help maintain consistent tube shape.

The finished tube is then cut into required lengths. After cutting, the run out table receives the tubes for inspection, collection, or bundling.

The complete process is designed to produce small galvanized tubes continuously while controlling surface quality, weld stability, and dimensional accuracy.

How To Choose

1. Confirm the Tube Diameter Range

The first step is to confirm the exact minimum and maximum tube diameter.

This machine is designed for 7.6 mm - 16 mm small-diameter tube production. If the customer also needs larger sizes, the machine structure and roller design must be adjusted.

2. Confirm the Wall Thickness

Wall thickness affects forming force, welding power, roller design, and production speed.

For very thin galvanized tubes, surface protection and stable feeding are important. For thicker tubes, the machine needs stronger forming force and suitable welding capacity.

3. Confirm the Galvanized Strip Quality

Galvanized steel surface condition directly affects finished tube appearance.

Customers should confirm zinc coating quality, strip width tolerance, strip thickness tolerance, surface oil condition, and coil quality before final machine design.

4. Confirm the Final Application

Furniture tubes, decorative tubes, light structural tubes, and industrial accessory tubes may have different requirements.

For visible products, surface quality is very important. For structural products, weld strength and dimensional consistency may be more important.

5. Confirm the Required Cutting Length

Small tubes may be cut into short or medium lengths depending on the application.

The cutting system should be selected according to tube length tolerance, cut-end quality, production speed, and bundling method.

6. Confirm Production Speed and Output

Higher speed can improve output, but it must match forming stability, welding performance, cutting accuracy, and finished tube handling.

For small galvanized tubes, stable production is more important than speed alone.

7. Confirm Factory Layout

The line layout should consider coil loading area, operator position, machine length, finished tube discharge direction, and collection method.

A compact and reasonable layout can improve production flow and reduce unnecessary manual handling.

FAQ

1. What is the main use of a 7.6 - 16 mm galvanized steel pipe making machine?

It is mainly used to produce small-diameter welded galvanized tubes for furniture, decoration, display racks, light structures, household products, and industrial accessories.

2. Can this machine protect the galvanized surface during production?

Yes. The machine can be designed with suitable roller structure, guiding system, forming pressure, and surface handling methods to reduce scratches and protect the galvanized coating as much as possible.

3. Why is small-diameter tube production difficult?

Small-diameter tube production requires high forming accuracy. Minor strip deviation, roller misalignment, or welding instability can cause obvious defects such as poor roundness, weak weld seams, surface scratches, or size deviation.

4. Can the machine produce carbon steel tubes as well as galvanized tubes?

Yes. The machine can be designed for galvanized steel strip and carbon steel strip. The final configuration depends on material thickness, surface requirement, welding condition, and application.

5. How should I choose the correct machine configuration?

You should provide tube diameter range, wall thickness, material type, galvanized coating requirement, production speed, cutting length, final application, and factory layout. Based on these details, the supplier can design a suitable production line.

Conclusion

The 7.6 - 16 mm Roll Forming Line and Pipe Making Machine for galvanized steel is a practical solution for small-diameter welded tube production.

A qualified machine should not only form and weld tubes. It should also protect the galvanized surface, control tube size, improve weld stability, support accurate cutting, and match the customer’s final application.

For manufacturers producing small galvanized tubes, the correct selection should be based on tube diameter, wall thickness, material quality, surface requirement, production speed, cutting length, and factory layout.