Slit Felt for Slitting Line | Surface Protection Felt for ERW Tube Mill

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Slit Felt for ERW Tube Mill Slitting Line

Slit Felt for Slitting Line is a durable, high-density felt pad used in ERW tube mill slitting sections for surface protection, strip tension control, and oil absorption. It ensures stable strip feeding and improved welded pipe quality.

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Product Details

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Slitting Line Technology

Slit Felt (also called Slitting Line Felt, Felt Pad, Felt Strip) is a soft, wear-resistant industrial felt used in the slitting section of ERW tube mills to protect steel strip surfaces and stabilize strip movement during high-speed processing.

In ERW tube mill production, the steel coil must go through Uncoiler → Slitting Line → Accumulator → Forming → Welding. During the slitting stage, slit felt plays a critical role in ensuring the strip surface is clean, scratch-free, and well-controlled before entering the welding line.

Slit felt is widely used for mild steel, galvanized steel, cold-rolled steel, stainless steel and pre-coated steel.

Main Applications in ERW Tube Mill Slitting Line

Slit felt is installed on several key positions of the slitting line:

✔ 1. Tension Stand (Tension Pad)

Provides stable friction and keeps the strip tension uniform.

✔ 2. Separator Arms / Overarm Separator

Prevents strip edges from scratching and keeps each strip separated smoothly.

✔ 3. Recoiler Entry Pad

Protects the steel surface before rewinding, avoiding impression marks.

✔ 4. Guide Plates / Support Bars

Used wherever the strip touches a support surface to avoid metal-to-metal contact.

✔ 5. Oil Absorption & Dust Removal

Helps remove residual oil from the strip surface and improves coil cleanliness before tube forming.

Functions & Advantages

Function	Description
⭐ Surface Protection	Prevents scratches, dents, and marks on zinc-coated or polished steel surfaces.
⭐ Stable Strip Tension	Provides consistent friction to maintain strip stability at high speed.
⭐ Oil Absorption	Felt fibers absorb excess lubricating oil or coolant.
⭐ Noise Reduction	Reduces metal friction noise inside the slitting machine.
⭐ Cleaner Production	Helps keep the strip dry and clean before entering the ERW tube mill.
⭐ Improved Slitting Quality	Minimizes strip vibration and edge burr scratches during separation.

This makes slit felt essential for high-speed ERW tube mill lines operating 60–220 m/min.

Available Specifications

Thickness: 5 mm, 8 mm, 10 mm, 12 mm, 15 mm (customized available)
Width: 20–200 mm
Density: 0.30–0.55 g/cm³
Temperature Resistance: 80–120°C
Hardness: Soft / Medium / Hard
Color: White / Grey / Black (polyester)

Why Slit Felt Is Important for ERW Tube Mills

In an ERW tube mill, the slitted strips will directly enter the accumulator, then into the forming and welding section. Any scratch, oil stain, or burr mark on the strip will affect:

welding stability
surface quality of the finished pipe
zinc coating after galvanizing
final pipe aesthetic and corrosion resistance

Using high-quality slit felt reduces surface defects and improves the overall performance of ERW welded pipes.

ERW tube slitting line

FAQs

What is slit felt used for in a slitting line?

It protects the steel strip surface and keeps stable tension during slitting.

Can slit felt be customized?

Yes, thickness, density and width are fully customizable.

Is wool felt better than polyester?

Wool offers better oil absorption and elasticity; polyester is more cost-effective.

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