Product Info

Choosing the right grooved plug ensures a tight, leak-free seal in tube rolling applications, especially in high-pressure systems like boilers and heat exchangers. Proper selection prevents long-term failures and enhances safety.

■ What Are Grooved Plugs in Tube Rolling?
Grooved plugs are used to seal unused tube ends in systems such as heat exchangers, condensers, and boilers. Unlike welded plugs, they rely on mechanical friction for locking.
Key Benefits:
・ Resists high internal pressure
・ Prevents leakage without welding
・ Stays secure under thermal and vibration stress

■ How to Select the Right Size and Shape
・ Size: Slightly oversized for interference fit
・ Shapes:
・ ・Cylindrical・: General use
・ ・Tapered・: Tighter lock
・ ・Angled Grooves・: Prevents dislodging under back pressure

Choose based on your operating pressure and tube configuration.

■ Material Compatibility is Critical
・ Brass: For copper tube systems
・ SUS304/SUS316 Stainless Steel: Ideal for corrosive or marine environments
・ Carbon Steel: For general industrial applications
・ Monel/Inconel: For chemical plants and high-corrosion environments
Using mismatched materials can cause galvanic corrosion—always match plug and tube material types.

■ Importance of Groove Design
・ Groove Angle: 15–30° for optimal locking force
・ Depth: Deep enough to grip, not weaken the structure
・ Number of Grooves: More grooves improve grip but increase cost
Good groove design is key for leak prevention, pressure resistance, and plug longevity.

■ Correct Installation Process
・ Use hydraulic plug installers or manufacturer-approved tools
・ Follow insertion direction and pressure specs
・ Conduct pressure testing to verify seal integrity
Improper installation can result in leakage or plug failure under pressure.

■ Recommended Products: FUJILLOY (THAILAND) CO., LTD.
FUJILLOY offers high-precision grooved plugs and rolls for critical industrial use.
Product Highlights:
・ Materials: Tungsten carbide, hardened steel, ceramics
・ Sizes: From 1 mm to 500 mm diameter
・ Precision: Tolerance up to ±0.001 mm
・ Shapes: Round, oval, and custom geometry
・ Coatings: TiN, CrN, DLC for long service life and reduced wear

Ideal for power plants, petrochemical systems, and industries requiring zero-leakage seals.

■ For more details, please download the PDF or contact us directly.

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