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Double Drum Un-coiler

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

The double drum un-coiler is the primary inlet equipment of the entire ERW welded tube production line, tasked with the pivotal front-end function of storing, holding, unwinding and feeding steel coil raw materials for downstream processing. Working in tandem with the coil loading trolley, it accepts heavy steel coils transported from the stockyard. Its expandable mandrel engages the coil’s inner bore for firm clamping, delivering steady radial support to avert coil deformation, loose winding and sudden collapse during decoiling.
Equipped with robust drive and brake assemblies, the uncoiler executes regulated, continuous unwinding to payout flat steel strip at a speed synchronized with the production line. It feeds the uncoiled strip onward to the leveler for preliminary straightening, removing inherent coil camber and surface undulation prior to the strip entering the tube mill forming section.
As the core starter unit that dictates material feeding pacing, stable operation of the uncoiler directly ensures uniform strip tension, uninterrupted material conveyance and holistic line stability. A properly specified uncoiler can effectively prevent strip jams, tensile deformation and inconsistent feeding faults. It lays a sound, qualified material base for high-precision tube forming, high-frequency welding, sizing, as well as all subsequent processes in production lines for OCTG casings, tubings and conventional structural steel pipes.

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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