114- 406 MM Tube Forming Machine for water& gas tube Production, API pipe Making

 

Tube forming machine specification

 

1. pipe O.D(round):114mm-406mm

2. Wall thickness:4.0-16.0mm

3. length:4-12m

4. Speed:40m/min

 

Basic necessaries for the BuyerL:

Steel strips	material	Low-carbon steel, low alloy steel:,σs≤345mpa,σb≤610mpa
	I.D	Φ350~Φ450mm
	O.D	Φ600~1000mm
	Width	350~1275mm
	Thickness	4.0-16mm
	Maximum.weight	≤25000KGS

 

Product Overview

The High Speed Tube Forming Machine for API Pipe Production is a high-precision ERW pipe manufacturing solution specifically engineered for producing API-standard steel pipes used in oil transmission, natural gas transportation, water pipelines, petrochemical projects, and energy infrastructure.

API pipe production requires far stricter dimensional tolerance, weld integrity, and mechanical performance than ordinary construction tubing. Manufacturers must consistently meet standards such as API 5L PSL1 and PSL2 while maintaining high production efficiency.

Our high-speed API pipe mill integrates precision roll forming technology, high-frequency welding systems, automatic sizing control, and intelligent monitoring systems to ensure stable production of high-quality ERW pipes suitable for demanding pipeline applications.

Conclusion: For manufacturers targeting the oil and gas sector, production stability and weld quality are more important than speed alone. A properly engineered API pipe mill directly determines product qualification rates and long-term profitability.

Cause

Why Is API Pipe Production More Difficult Than Standard Pipe Manufacturing?

Many manufacturers entering the oil and gas market discover that producing API pipes is significantly more challenging than producing ordinary structural tubes.

High Strength Steel Creates Forming Challenges

API-grade materials often include:

• X42
• X52
• X60
• X70

These materials have higher yield strength and place greater stress on the forming system.

Insufficient roll design can lead to:

• Edge buckling
• Surface scratches
• Poor roundness
• Residual stress concentration

Welding Defects Become Critical

Pipeline applications operate under pressure.

Even minor welding defects may cause:

• Leakage
• Crack propagation
• Reduced fatigue life
• Product rejection

Tight Dimensional Tolerance Requirements

Pipeline contractors require strict control of:

• Outside diameter
• Wall thickness
• Straightness
• Ovality

Deviation beyond specification may prevent field installation.

Increasing Global Quality Standards

Oil and gas projects increasingly require:

• API 5L compliance
• Ultrasonic testing
• Hydrostatic testing
• Weld seam inspection

Many conventional tube mills struggle to meet these requirements consistently.

Solution

High Precision API Pipe Manufacturing Solution

Our ERW tube mill is designed specifically to solve the challenges associated with API-grade pipe production.

Precision Roll Forming Technology

Advanced roll pass engineering distributes forming stress evenly across the strip.

Benefits include:

• Improved pipe roundness
• Reduced material stress
• Better weld edge preparation
• Higher dimensional consistency

High Frequency Welding System

The high-frequency welding unit provides concentrated heating along strip edges.

Advantages include:

• Deep weld penetration
• Consistent fusion quality
• Reduced heat affected zone
• Superior seam strength

Online Weld Monitoring

Optional inspection systems include:

• Eddy Current Testing (ECT)
• Ultrasonic Testing (UT)
• Weld seam tracking
• Infrared temperature monitoring

These systems improve quality control and reduce defect rates.

Precision Sizing and Straightening

Multiple sizing stands ensure:

• Accurate outside diameter
• Excellent straightness
• Controlled ovality
• Better field installation performance

Intelligent Automation

The PLC control system enables:

• Recipe storage
• Automatic parameter adjustment
• Production data logging
• Fault diagnosis

This reduces human error and improves manufacturing consistency.

Specifications

Parameter	Specification
Pipe Diameter Range	Φ114 mm – Φ219 mm
Wall Thickness Range	3.0 mm – 10.0 mm
Steel Grade	API X42–X70
Production Speed	Up to 80 m/min
Welding Type	High Frequency ERW
Forming Method	Continuous Roll Forming
Length Accuracy	±3 mm
Diameter Tolerance	According to API 5L
Control System	PLC + HMI
Testing Options	UT, ECT, Hydro Test
Power Supply	380V / 50Hz / 3 Phase
Annual Production Capacity	Up to 120,000 Tons

Final configuration can be customized according to API pipe specifications and customer production requirements.

Application

Oil Transmission Pipelines

Used for transporting crude oil across long-distance pipeline networks where weld integrity is essential.

Natural Gas Pipelines

Manufactures high-strength ERW pipes suitable for natural gas transmission projects.

Petrochemical Industry

Applicable for refinery and chemical plant piping systems requiring reliable pressure resistance.

Water Transmission Projects

Suitable for municipal and industrial water transportation infrastructure.

Energy Infrastructure

Widely used in:

• LNG projects
• Power generation facilities
• Hydrogen transportation development projects
• Offshore support facilities

How It Works

API Pipe Production Process

Step 1: Uncoiling

Steel coils are loaded and continuously fed into the production line.

Step 2: End Shearing and Welding

Coil ends are joined to maintain uninterrupted production.

Step 3: Accumulator Storage

The accumulator provides continuous strip feeding during coil changes.

Step 4: Forming

Multiple forming stands gradually transform flat strip into a cylindrical tube.

Step 5: High Frequency Welding

The strip edges are heated using high-frequency current and forged together under pressure.

Step 6: Weld Bead Removal

Internal and external weld beads are removed for improved flow characteristics.

Step 7: Sizing and Straightening

The pipe is calibrated to final dimensions.

Step 8: Inspection and Testing

Optional systems perform:

• Ultrasonic testing
• Eddy current testing
• Hydrostatic testing
• Dimensional inspection

Step 9: Flying Saw Cutting

Pipes are cut to customer-specified lengths.

Step 10: Packing and Shipment

Finished products are prepared for delivery or downstream processing.

How To Choose

How To Select the Right API Pipe Production Line

Define Required Pipe Diameter

Different markets require different size ranges.

For example:

• Oil gathering pipelines
• Transmission pipelines
• Water transportation pipelines

all require different configurations.

Confirm Steel Grade Requirements

Higher-grade materials such as X60 and X70 require stronger forming and welding capabilities.

Evaluate Inspection Requirements

Projects requiring API PSL2 certification typically need additional testing equipment.

Consider Future Production Expansion

Selecting a machine with upgrade capability reduces future investment costs.

Assess Production Capacity

Choose line speed and mill size according to annual production targets.

Recommendation: The best API pipe mill is not necessarily the fastest machine, but the one that consistently meets quality standards while maximizing production efficiency.

Why Choose Zhongyue Metallurgy Equipment

Extensive Experience in ERW Pipe Manufacturing

Zhangjiagang Zhongyue Metallurgy Equipment Technology Co., Ltd. specializes in:

• ERW Pipe Mills
• API Pipe Production Lines
• Square Tube Mills
• Direct Forming to Square (DFT) Mills

Engineering Expertise

Our technical team provides:

• Roll pass design
• Factory layout planning
• Installation supervision
• Commissioning services
• Operator training

International Project Experience

Our equipment has been supplied to customers across:

• India
• Middle East
• Africa
• Russia
• Southeast Asia

Reliable Quality Assurance

Every production line undergoes mechanical testing, electrical inspection, and trial operation before shipment.

FAQ

1. Can this machine produce API 5L PSL2 pipes?

Yes. The production line can be configured with advanced inspection systems to support API 5L PSL2 production requirements.

2. What steel grades can be processed?

The machine can process API X42, X52, X60, and X70 materials depending on final configuration.

3. What inspection systems are available?

Optional systems include UT, ECT, Hydrostatic Testing, weld seam monitoring, and dimensional measurement.

4. What production speed can be achieved?

Depending on pipe size and wall thickness, speeds up to 80 meters per minute can be achieved while maintaining API quality requirements.

5. Is the production line suitable for oil and gas pipeline projects?

Yes. The machine is specifically designed for manufacturing ERW pipes used in oil, gas, petrochemical, and energy infrastructure projects.

Conclusion

API pipe production demands more than simple tube forming capability. Manufacturers need precise forming technology, stable high-frequency welding, strict dimensional control, and reliable inspection systems to compete in today's oil and gas market. A high-speed, high-precision API pipe mill provides the production consistency necessary to meet international standards, reduce rejection rates, and improve long-term profitability.