PTFE / Xylan Coated Stud Bolt

High-Performance PTFE / Xylan Coated Stud Bolts

In aggressive environments where corrosion, chemical attack, and galling are major concerns, standard fasteners are not enough. Asia Bolts Industries LLC supplies premium PTFE coated stud bolts (often referred to as Xylan coated) that provide an impermeable barrier against harsh elements. These coated fasteners are essential for offshore platforms, subsea pipelines, and chemical processing plants.

Our coating process ensures uniform coverage, precise torque-tension relationships, and long-term durability. As a Saudi Aramco approved manufacturer based in UAE, we deliver certified coated stud bolts that meet the strictest industry standards for corrosion protection.

Technical Specifications

Xylan Coating (Whitford Xylan®)

Key performance characteristics of Xylan-coated stud bolts:

Superior corrosion resistance — exceeds 1,000 hours salt spray resistance to ASTM B117, outperforming hot-dip galvanizing and electroplating by a significant margin
Low, controlled friction — coefficient of friction 0.03–0.15 depending on grade, enabling accurate torque-to-tension conversion and eliminating galling
Outstanding abrasion resistance — the organic binder matrix gives Xylan significantly better wear resistance than pure PTFE coatings
Broad chemical compatibility — resistant to most acids, alkalis, solvents, H₂S, CO₂, chlorides, and hydrocarbon fluids
Thermal stability — service temperatures from –70°C to +230°C for most grades
Thin, precise coating — typical DFT 10–25 microns, preserving dimensional accuracy and thread tolerances
Colour-coded grades — Xylan 1070 (blue), 1424 (grey/green), 1052 (black), 1014 (brown) for easy identification

Xylan grades available:

Xylan GradeColourPrimary AdvantageTypical ApplicationXylan 1070BlueBest corrosion & chemical resistanceSour gas, offshore, subseaXylan 1424Grey/GreenHighest temperature performanceRefinery hot bolting, steam linesXylan 1052BlackExcellent abrasion + corrosionStructural & industrial flangesXylan 1014BrownGood general-purpose performancePipelines, general oil & gasXylan 1331WhiteFood-grade, low contaminationWater treatment, food processing
Best suited for: Oil & gas flanges, subsea bolting, H₂S / sour service, high-pressure pipelines, desalination plants, offshore topsides, chemical reactor flanges, and any application requiring repeatable bolt tensioning with documented torque coefficients.

Benefits of PTFE / Xylan Coating

Choosing PTFE coated stud bolts over plain or galvanized fasteners offers significant advantages in critical applications:

• Superior Corrosion Resistance: Protects against chlorides, acids, alkalis, and solvents. Ideal for C5-M marine environments.
• Anti-Galling Properties: Prevents seizing between nut and bolt, especially in stainless steel assemblies (B8/B8M).
• Low Friction Coefficient: Ensures accurate torque-tension relationship, reducing the risk of over-tightening or under-tightening.
• Non-Stick Surface: Prevents buildup of debris, scale, or process materials on the fastener.
• Electrical Insulation: Provides dielectric properties to prevent galvanic corrosion between dissimilar metals.

Quality Control & Coating Inspection

At Asia Bolts Industries LLC, the coating process is monitored rigorously to ensure performance. Our quality control measures include:

• Surface Preparation: Grit blasting to Sa 2.5 standard before coating to ensure adhesion.
• Thickness Testing: Magnetic induction or eddy current testing to verify micron thickness.
• Holiday Detection: Spark testing to identify any pinholes or gaps in the coating layer.
• Adhesion Test: Cross-cut testing to ensure the coating does not peel under stress.
• Torque Testing: Verification of K-factor (nut factor) for consistent preload.

Request a Quote for PTFE Coated Studs

Protect your infrastructure with certified corrosion-resistant fasteners. Contact Asia Bolts Industries LLC today for pricing on PTFE coated stud bolts. We offer competitive rates for bulk orders and project-specific requirements.

Request a Quote Now | Contact Engineering Team