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Heavy Duty Expandable Mandrel Uncoiler for ERW Tube Mill Line,OCTG Steel Coil Decoiling Machine

Equipment Composition

Mechanic: Un-coiler main unit (main body, drum and expansion and contraction device, brake device), hold down roll device.

Hydraulic: Shared among the hydraulic system of entry section

Electric: Shared among the electrical control system of entry section, plus a nearby control box and a mobile remote control for un-coiler

Pneumatic: Air value, solenoid valve, air station

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Product Introduction

Overview

An uncoiler, also known as a decoiler, functions as the primary feeding unit for a complete ERW tube mill line. It is purpose‑built to hold, support and continuously pay off steel coils for downstream operations such as strip leveling, forming, welding and pipe sizing across the entire ERW pipe‑manufacturing process.
Our Expandable Mandrel Uncoiler for ERW Tube Mill Line processes carbon‑steel, alloy‑steel and galvanized‑steel coils across a wide range of coil weights and widths. Fitted with a hydraulically expandable and retractable mandrel, the machine securely grips steel coils to avoid slippage during unwinding. Its built‑in anti‑torsion structure and tension control deliver stable, uniform strip feeding while minimizing material deformation. This protects the whole ERW tube mill line and supports uninterrupted continuous production.
We supply both single‑head and double‑head uncoiler variants for ERW pipe mills. The double‑head design enables seamless coil changeover, substantially cutting downtime and boosting overall tube‑making productivity. Our uncoilers boast excellent compatibility with ERW pipe mills, steel tube forming machinery and OCTG production lines, and are well‑acknowledged by steel pipe manufacturers worldwide.
Custom‑tailored uncoiler solutions are available based on your actual coil specifications, ERW mill capacity and plant layout. Please contact us for technical datasheets and quotations for your ERW tube mill project.

Our Advantages

  • The two drums operate in a continuous cycle: one performs unwinding while the other handles coil loading. This design cuts downtime and boosts productivity. In addition, the drums support forward and reverse rotation to enable both upward and downward unwinding.
  • A brake unit mounted at the rear of the main machine keeps the coil firmly positioned during operation.
  • The hold-down roll prevents coil bounce and avoids personal injury risks.

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.

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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.
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Frequently Asked Questions

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.
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.
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.
Yes. We offer full turn key solutions including process design, equipment manufacturing, installation guidance, commissioning, operator training and after sales service.
Absolutely. Our heat treatment and forming systems are specially engineered for high strength steel grades required for deep well oil and gas OCTG pipes.
T/T, L/C at sight are available. Flexible payment terms can be discussed for large scale turn key projects.
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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