Fluoropolymer Coated Fasteners

High-Performance Engineering Overview

Fluoropolymer Coated Fasteners manufactured and supplied by ASK Innocomp Pvt. Ltd. represents the highest standard of thermoplastic and fluoropolymer engineering. Specifically designed to solve the critical vulnerabilities of standard metallic and commercial plastic hardware in corrosive chemical plants, this product delivers exceptional durability, chemical immunity, and extended maintenance-free service life.

Technical Specifications & Engineering Parameters

Parameter	Engineering Specification
Base Substrate Material	ASTM A193 Grade B7 / B7M, Stainless Steel 304/316, ASTM A320 L7
Nut & Washer Specifications	ASTM A194 Grade 2H / 2HM Heavy Hex Nuts; ASTM F436 Hardened Washers
Fluoropolymer Coating	Thermoset PTFE / Xylan 1070 / 1424 Multi-Layer Barrier Coating
Coating Thickness	20 to 35 Microns (Evenly applied across external threads)
Corrosion Resistance (ASTM B117)	1,000+ to 3,000+ Hours Salt Spray Testing with Zero Red Rust
Coefficient of Friction	0.06 - 0.08 (Uniform torque tensioning with zero thread galling)
Operating Temperature Range	-200°C to +260°C
Color Coding Available	Standard Blue (Xylan Blue), High-Visibility Yellow, Green, Black, Silver

Key Features & Operating Advantages

• 1,000+ Hours Salt Spray Protection: Multi-coat fluoropolymer barrier completely shields steel substrate from harsh acid mists, sulfur gases, and coastal saline air.
• Prevents Thread Galling & Cold Welding: Low coefficient of friction ensures smooth, predictable torque-tension transmission during flange bolt-up.
• Easy Non-Destructive Disassembly: Eliminates flame cutting or nut splitting during scheduled plant turnaround and maintenance.
• Precise Uniform Film Thickness: Clean, uniform 25-micron coating guarantees full thread engagement without requiring oversize tapping.
• High Tensile Mechanical Strength: Retains full structural load capacity of ASTM A193 B7 high-tensile alloy steel for high-pressure chemical flanges.

Quality Assurance, Testing & Compliance

At ASK Innocomp, quality control is integrated at every manufacturing step:

• High-Voltage Dielectric Spark Testing (20,000V): 100% verification of non-porous fluoropolymer coatings and lining integrity.
• Hydrostatic & Tensile Load Testing: Proof pressure tested to 1.5x working rating with tensile pull verification.
• Laser Dimensional Measurement: Precision tolerance checks ensuring exact interchangeability with standard plant flanges and fittings.
• Mill Test Certificates (EN 10204 3.1): Full raw material batch traceability provided with every dispatch.

Recommended Industrial Applications

• Acid storage tank manways, flanged nozzles, and agitator bridge mountings
• Chemical plant piping flanges (FRP, PPH, PVDF, and PTFE lined steel)
• Offshore oil & gas platforms, marine structures, and coastal processing facilities
• Pollution control scrubber tower flanged joints and centrifugal fan casings
• Fertilizer, Chlor-Alkali, and metal galvanizing plant structural framing