Φ325-630mm DFT Direct Forming&Sizing Mill with Quick Change System,OCTG Pipe Mill Forming Sizing Unit

Equipment Composition

The tube mill consists of Forming Section, Welding Section, Cooling Section, Sizing Section and Turks Head Section.

Layout

Forming→Feed in

↓

Break Down and Fin Pass

↓

Welding →Guiding→ Squeezing→ Weld part→External Scarfing

↓

Water Cooling

↓

Sizing

↓

Turks Head

Product Introduction

Overview

Our DFT Direct Forming&Sizing Mill with Quick Change System serve as the core forming assembly for high-frequency ERW tube production lines. They gradually shape incoming steel strip into a closed tubular profile via staged roller deformation. The butted strip edges are fused by an HF induction welder to form a sturdy, long-service weld seam. Newly welded tubes are conveyed to the cooling zone for controlled heat dissipation. Sizing stands accurately calibrate outer dimensions to meet strict tolerance standards, and downstream Turks Head units optimize profiles and implement pre-straightening, yielding finished square and rectangular tubes with stable dimensional uniformity, superior straightness and excellent overall geometric precision.

Conventional Forming(W Forming)

This design features enhanced maintainability and operational convenience, while effectively improving on-site safety.

High-precision forming stands adopt mechanical shaft expansion for roll shaft connection, ensuring outstanding dimensional accuracy of pipe diameters.

It delivers superior performance and maximizes production throughput. This solution not only boosts production speed, but also reduces equipment wear and tear to extend the service life of the machinery.

Flexible Forming(FF/FFX)

It not only cuts down roll replacement time significantly, but also reduces roller costs by 40–60%.

Rollers are compatible for producing round and square tubes within a certain size range on the same production line, eliminating frequent replacements for different specifications.

By automating multiple procedures in the tube forming process, FF/FFX technology minimizes manual work, effectively lowering labor costs and reducing human error.

Direct Forming(DFT)

It delivers excellent flexibility. Tube dimensions within the mill’s size range can be adjusted without roll replacement.

Full automation of line operation and roll adjustment cuts labor requirements, boosts productivity, and lowers inventory and associated costs.

Equipped with a built-in recipe database and mobile touch screen, the system enables one-click automatic adjustment of roll angles and positions during product changeovers.

Quick Change System

During product changeover, the entire shaft assembly can be lifted from the horizontal stand. Replacement takes only minutes rather than hours.

The universal shaft is automatically engaged and disengaged by hydraulic cylinders. This allows rolls to be prepared, replaced and adjusted offline without halting production.

While offline roll preparation is underway, a pre-assembled spare shaft assembly can be mounted onto the horizontal stand to finish the changeover. This quick-change system drastically cuts machine downtime.

Specifications

Model╲Spec.	Size(mm)	Thickness(mm)	Forming Method	Roll Quick Change
ZJ-GH32	Φ10-32	1.1-2.25	W	Roller changing trolley
ZJ-GH50	Φ12-50	1.2-2.75	W	Roller changing trolley
ZJ-GH76	Φ32-76	1.5-3.5	W	Rafted System
ZJ-GH89	Φ32-89	1.5-3.75	W	Rafted System
ZJ-GH114	Φ40-114	1.5-4.0	W	Rafted System
ZJ-GH140	Φ48-140	1.5-5.0	W	Rafted System
ZJ-GH165	Φ76-165	1.8-6.0	W/DFT	Rafted System
ZJ-GH219	Φ89-219	2.0-8.0	FF/DFT	Shaft Assembly
ZJ-GH273	Φ114-273	3.0-10.0	FF/DFT	Shaft Assembly
ZJ-GH325	Φ165-325	5.0-14.0	FF/DFT	Shaft Assembly
ZJ-GH355	Φ165-355	5.0-15.0	FFX/DFT	Shaft Assembly
ZJ-GH406	Φ219-406	6.0-16.0	FFX/DFT	Shaft Assembly
ZJ-GH457	Φ219-457	6.0-18.0	FFX/DFT	Shaft Assembly
ZJ-GH508	Φ273-508	6.0-20.0	FFX/DFT	Shaft Assembly
ZJ-GH610	Φ273-610	6.0-21.0	FFX/DFT	Shaft Assembly
ZJ-GH660	Φ325-630	6.0-22.0	FFX/DFT	Shaft Assembly
ZJ-GH711	Φ325-760	8.0-22.0	FFX/DFT	Shaft Assembly

About GH-Petro

GH-Petro supplies customized ERW & OCTG pipe mill solutions.We combine domestic craftsmanship and international leading technologies to deliver high-quality equipment and reliable services.

Request a Quote

Order Process

1️⃣ Send Your Inquiry
Tell us your product needs and order details.

2️⃣ Confirm the Solution
We recommend the right product and confirm the price.

3️⃣ Production & Quality Check
We arrange production and check the quality before delivery.

4️⃣ Shipping & Support
We ship the goods and provide after-sales support.

Simple. Fast. Reliable.

Frequently Asked Questions

What types of pipes mill do you supply?

We are a professional manufacturer and we could supply customized mill for ERW pipes and full-range OCTG pipes to meet your request,which include Entry Section,Forming&Sizing,Solid State HF Welder,Straightening Machine,Cold Flying Saw,End Facing Machine,Hydro-tester,UT Flaw Detection Machine,Threading Machine,Bucking Machine and Pipes Packing Machine.

What is your MOQ for Mill orders?

MOQ is flexible for us and one set is feasible.Of course our team also could supply you a complete solution according to your request.

Which standards do your pipe mill machines follow?

All kinds of our equipment are designed for producing pipes meeting API 5CT, API 5L, ASTM, EN, ISO and GB standards, suitable for oil & gas, pipeline, structural and industrial pipe applications.

Can you provide turn key ERW & OCTG pipe mill projects?

Yes. We offer full turn key solutions including process design, equipment manufacturing, installation guidance, commissioning, operator training and after sales service.

Do your machines support high grade OCTG production such as N80, L80, P110?

Absolutely. Our heat treatment and forming systems are specially engineered for high strength steel grades required for deep well oil and gas OCTG pipes.

What payment terms do you accept?

T/T, L/C at sight are available. Flexible payment terms can be discussed for large scale turn key projects.

What is your warranty period?

We provide 12 month warranty for core components from the date of shipment, with lifelong technical consultation and spare part supply service.

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